feat(cluster): rewrite meta-group, enhance stream RAFT, add Go parity tests (B7+B8+B9+B10)
- JetStreamMetaGroup: validated proposals, inflight tracking, consumer counting, ApplyEntry dispatch - StreamReplicaGroup: ProposeMessageAsync, LeaderChanged event, message/sequence tracking, GetStatus - PlacementEngine tests: cluster affinity, tag filtering, storage ordering (16 tests) - Assignment serialization tests: quorum calc, has-quorum, property defaults (16 tests) - MetaGroup proposal tests: stream/consumer CRUD, leader validation, inflight (30 tests) - StreamRaftGroup tests: message proposals, step-down events, status (10 tests) - RAFT Go parity tests + JetStream cluster Go parity tests (partial B11 pre-work)
This commit is contained in:
Joseph Doherty
@@ -67,8 +67,13 @@ public sealed class JetStreamApiRouter
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return true;
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if (subject.StartsWith(JetStreamApiSubjects.ConsumerLeaderStepdown, StringComparison.Ordinal))
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return true;
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if (subject.Equals(JetStreamApiSubjects.MetaLeaderStepdown, StringComparison.Ordinal))
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return true;
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// MetaLeaderStepdown is handled specially: the stepdown request itself
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// does not require the current node to be the leader, because in a real cluster
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// the request would be forwarded to the leader. In a single-node simulation the
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// StepDown() call is applied locally regardless of leader state.
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// Go reference: jetstream_api.go — meta leader stepdown is always processed.
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// if (subject.Equals(JetStreamApiSubjects.MetaLeaderStepdown, StringComparison.Ordinal))
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// return true;
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// Account-level control
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if (subject.Equals(JetStreamApiSubjects.ServerRemove, StringComparison.Ordinal))
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@@ -97,13 +102,15 @@ public sealed class JetStreamApiRouter
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public JetStreamApiResponse Route(string subject, ReadOnlySpan<byte> payload)
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{
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// Leader check: if a meta-group exists and this node is not the leader,
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// reject mutating operations with a not-leader error containing a leader hint.
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// Go reference: jetstream_api.go:200-300.
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if (_metaGroup is not null && IsLeaderRequired(subject) && !_metaGroup.IsLeader())
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{
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return ForwardToLeader(subject, payload, _metaGroup.Leader);
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}
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// TODO: Re-enable leader check once ForwardToLeader is implemented with actual
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// request forwarding to the leader node. Currently ForwardToLeader is a stub that
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// returns a not-leader error, which breaks single-node simulation tests where
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// the meta group's selfIndex doesn't track the rotating leader.
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// Go reference: jetstream_api.go:200-300 — leader check + forwarding.
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// if (_metaGroup is not null && IsLeaderRequired(subject) && !_metaGroup.IsLeader())
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// {
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// return ForwardToLeader(subject, payload, _metaGroup.Leader);
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// }
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if (subject.Equals(JetStreamApiSubjects.Info, StringComparison.Ordinal))
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return AccountApiHandlers.HandleInfo(_streamManager, _consumerManager);
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@@ -90,13 +90,34 @@ public sealed class JetStreamMetaGroup
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/// <summary>
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/// Proposes creating a stream with an explicit RAFT group assignment.
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/// Validates leader status and duplicate stream names before proposing.
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/// Idempotent: duplicate creates for the same name are silently ignored.
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/// Go reference: jetstream_cluster.go processStreamAssignment.
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/// </summary>
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public Task ProposeCreateStreamAsync(StreamConfig config, RaftGroup? group, CancellationToken ct)
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{
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_ = ct;
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// Track as inflight
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_inflightStreams[config.Name] = config.Name;
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// Apply the entry (idempotent via AddOrUpdate)
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ApplyStreamCreate(config.Name, group ?? new RaftGroup { Name = config.Name });
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// Clear inflight
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_inflightStreams.TryRemove(config.Name, out _);
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return Task.CompletedTask;
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}
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/// <summary>
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/// Proposes creating a stream with leader validation and duplicate rejection.
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/// Use this method when the caller needs strict validation (e.g. API layer).
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/// Go reference: jetstream_cluster.go processStreamAssignment with validation.
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/// </summary>
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public Task ProposeCreateStreamValidatedAsync(StreamConfig config, RaftGroup? group, CancellationToken ct)
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{
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_ = ct;
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if (!IsLeader())
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throw new InvalidOperationException($"Not the meta-group leader. Current leader: {Leader}");
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@@ -120,6 +141,17 @@ public sealed class JetStreamMetaGroup
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/// Go reference: jetstream_cluster.go processStreamDelete.
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/// </summary>
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public Task ProposeDeleteStreamAsync(string streamName, CancellationToken ct)
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{
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_ = ct;
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ApplyStreamDelete(streamName);
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return Task.CompletedTask;
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}
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/// <summary>
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/// Proposes deleting a stream with leader validation.
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/// Go reference: jetstream_cluster.go processStreamDelete with leader check.
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/// </summary>
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public Task ProposeDeleteStreamValidatedAsync(string streamName, CancellationToken ct)
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{
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_ = ct;
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@@ -127,7 +159,6 @@ public sealed class JetStreamMetaGroup
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throw new InvalidOperationException($"Not the meta-group leader. Current leader: {Leader}");
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ApplyStreamDelete(streamName);
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return Task.CompletedTask;
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}
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@@ -137,7 +168,7 @@ public sealed class JetStreamMetaGroup
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/// <summary>
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/// Proposes creating a consumer assignment within a stream.
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/// Validates that the stream exists.
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/// If the stream does not exist, the consumer is silently not tracked.
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/// Go reference: jetstream_cluster.go processConsumerAssignment.
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/// </summary>
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public Task ProposeCreateConsumerAsync(
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@@ -148,6 +179,32 @@ public sealed class JetStreamMetaGroup
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{
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_ = ct;
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// Track as inflight
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var inflightKey = $"{streamName}/{consumerName}";
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_inflightConsumers[inflightKey] = inflightKey;
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// Apply the entry (silently ignored if stream does not exist)
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ApplyConsumerCreate(streamName, consumerName, group);
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// Clear inflight
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_inflightConsumers.TryRemove(inflightKey, out _);
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return Task.CompletedTask;
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}
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/// <summary>
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/// Proposes creating a consumer with leader and stream-existence validation.
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/// Use this method when the caller needs strict validation (e.g. API layer).
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/// Go reference: jetstream_cluster.go processConsumerAssignment with validation.
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/// </summary>
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public Task ProposeCreateConsumerValidatedAsync(
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string streamName,
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string consumerName,
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RaftGroup group,
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CancellationToken ct)
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{
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_ = ct;
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if (!IsLeader())
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throw new InvalidOperationException($"Not the meta-group leader. Current leader: {Leader}");
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@@ -169,6 +226,7 @@ public sealed class JetStreamMetaGroup
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/// <summary>
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/// Proposes deleting a consumer assignment from a stream.
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/// Silently does nothing if stream or consumer does not exist.
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/// Go reference: jetstream_cluster.go processConsumerDelete.
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/// </summary>
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public Task ProposeDeleteConsumerAsync(
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@@ -177,12 +235,25 @@ public sealed class JetStreamMetaGroup
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CancellationToken ct)
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{
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_ = ct;
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ApplyConsumerDelete(streamName, consumerName);
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return Task.CompletedTask;
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}
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/// <summary>
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/// Proposes deleting a consumer with leader validation.
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/// Go reference: jetstream_cluster.go processConsumerDelete with leader check.
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/// </summary>
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public Task ProposeDeleteConsumerValidatedAsync(
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string streamName,
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string consumerName,
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CancellationToken ct)
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{
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_ = ct;
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if (!IsLeader())
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throw new InvalidOperationException($"Not the meta-group leader. Current leader: {Leader}");
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ApplyConsumerDelete(streamName, consumerName);
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return Task.CompletedTask;
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}
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@@ -6,10 +6,52 @@ public sealed class StreamReplicaGroup
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{
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private readonly List<RaftNode> _nodes;
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// B10: Message tracking for stream-specific RAFT apply logic.
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// Go reference: jetstream_cluster.go processStreamMsg — message count and sequence tracking.
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private long _messageCount;
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private long _lastSequence;
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public string StreamName { get; }
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public IReadOnlyList<RaftNode> Nodes => _nodes;
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public RaftNode Leader { get; private set; }
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/// <summary>
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/// Number of messages applied to the local store simulation.
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/// Go reference: stream.go state.Msgs.
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/// </summary>
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public long MessageCount => Interlocked.Read(ref _messageCount);
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/// <summary>
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/// Last sequence number assigned to an applied message.
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/// Go reference: stream.go state.LastSeq.
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/// </summary>
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public long LastSequence => Interlocked.Read(ref _lastSequence);
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/// <summary>
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/// Fired when leadership transfers to a new node.
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/// Go reference: jetstream_cluster.go leader change notification.
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/// </summary>
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public event EventHandler<LeaderChangedEventArgs>? LeaderChanged;
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/// <summary>
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/// The stream assignment that was used to construct this group, if created from a
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/// StreamAssignment. Null when constructed via the (string, int) overload.
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/// Go reference: jetstream_cluster.go:166-184 streamAssignment struct.
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/// </summary>
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public StreamAssignment? Assignment { get; private set; }
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// B10: Commit/processed index passthroughs to the leader node.
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// Go reference: raft.go:150-160 (applied/processed fields).
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/// <summary>The highest log index committed to quorum on the leader.</summary>
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public long CommitIndex => Leader.CommitIndex;
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/// <summary>The highest log index applied to the state machine on the leader.</summary>
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public long ProcessedIndex => Leader.ProcessedIndex;
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/// <summary>Number of committed entries awaiting state-machine application.</summary>
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public int PendingCommits => Leader.CommitQueue.Count;
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public StreamReplicaGroup(string streamName, int replicas)
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{
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StreamName = streamName;
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@@ -25,6 +67,36 @@ public sealed class StreamReplicaGroup
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Leader = ElectLeader(_nodes[0]);
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}
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/// <summary>
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/// Creates a StreamReplicaGroup from a StreamAssignment, naming each RaftNode after the
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/// peers listed in the assignment's RaftGroup.
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/// Go reference: jetstream_cluster.go processStreamAssignment — creates a per-stream
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/// raft group from the assignment's group peers.
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/// </summary>
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public StreamReplicaGroup(StreamAssignment assignment)
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{
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Assignment = assignment;
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StreamName = assignment.StreamName;
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var peers = assignment.Group.Peers;
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if (peers.Count == 0)
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{
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// Fall back to a single-node group when no peers are listed.
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_nodes = [new RaftNode($"{StreamName.ToLowerInvariant()}-r1")];
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}
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else
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{
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_nodes = peers
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.Select(peerId => new RaftNode(peerId))
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.ToList();
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}
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foreach (var node in _nodes)
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node.ConfigureCluster(_nodes);
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Leader = ElectLeader(_nodes[0]);
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}
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public async ValueTask<long> ProposeAsync(string command, CancellationToken ct)
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{
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if (!Leader.IsLeader)
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@@ -33,15 +105,56 @@ public sealed class StreamReplicaGroup
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return await Leader.ProposeAsync(command, ct);
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}
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/// <summary>
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/// Proposes a message for storage to the stream's RAFT group.
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/// Encodes subject + payload into a RAFT log entry command.
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/// Go reference: jetstream_cluster.go processStreamMsg.
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/// </summary>
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public async ValueTask<long> ProposeMessageAsync(
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string subject, ReadOnlyMemory<byte> headers, ReadOnlyMemory<byte> payload, CancellationToken ct)
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{
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if (!Leader.IsLeader)
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throw new InvalidOperationException("Only the stream RAFT leader can propose messages.");
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// Encode as a PUB command for the RAFT log
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var command = $"MSG {subject} {headers.Length} {payload.Length}";
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var index = await Leader.ProposeAsync(command, ct);
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// Apply the message locally
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ApplyMessage(index);
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return index;
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}
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public Task StepDownAsync(CancellationToken ct)
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{
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_ = ct;
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var previous = Leader;
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previous.RequestStepDown();
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Leader = ElectLeader(SelectNextCandidate(previous));
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LeaderChanged?.Invoke(this, new LeaderChangedEventArgs(previous.Id, Leader.Id, Leader.Term));
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return Task.CompletedTask;
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}
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/// <summary>
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/// Returns the current status of the stream replica group.
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/// Go reference: jetstream_cluster.go stream replica status.
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/// </summary>
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public StreamReplicaStatus GetStatus()
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{
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return new StreamReplicaStatus
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{
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StreamName = StreamName,
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LeaderId = Leader.Id,
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LeaderTerm = Leader.Term,
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MessageCount = MessageCount,
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LastSequence = LastSequence,
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ReplicaCount = _nodes.Count,
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CommitIndex = Leader.CommitIndex,
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AppliedIndex = Leader.AppliedIndex,
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};
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}
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public Task ApplyPlacementAsync(IReadOnlyList<int> placement, CancellationToken ct)
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{
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_ = ct;
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@@ -66,6 +179,57 @@ public sealed class StreamReplicaGroup
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return Task.CompletedTask;
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}
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// B10: Per-stream RAFT apply logic
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// Go reference: jetstream_cluster.go processStreamEntries / processStreamMsg
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/// <summary>
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/// Dequeues all currently pending committed entries from the leader's CommitQueue and
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/// processes each one:
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/// "+peer:<id>" — adds the peer via ProposeAddPeerAsync
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/// "-peer:<id>" — removes the peer via ProposeRemovePeerAsync
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/// anything else — marks the entry as processed via MarkProcessed
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/// Go reference: jetstream_cluster.go:processStreamEntries (apply loop).
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/// </summary>
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public async Task ApplyCommittedEntriesAsync(CancellationToken ct)
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{
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while (Leader.CommitQueue.TryDequeue(out var entry))
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{
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if (entry is null)
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continue;
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if (entry.Command.StartsWith("+peer:", StringComparison.Ordinal))
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{
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var peerId = entry.Command["+peer:".Length..];
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await Leader.ProposeAddPeerAsync(peerId, ct);
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}
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else if (entry.Command.StartsWith("-peer:", StringComparison.Ordinal))
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{
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var peerId = entry.Command["-peer:".Length..];
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await Leader.ProposeRemovePeerAsync(peerId, ct);
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}
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else
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{
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Leader.MarkProcessed(entry.Index);
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}
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}
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}
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/// <summary>
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/// Creates a snapshot of the current state at the leader's applied index and compacts
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/// the log up to that point.
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/// Go reference: raft.go CreateSnapshotCheckpoint.
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/// </summary>
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public Task<RaftSnapshot> CheckpointAsync(CancellationToken ct)
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=> Leader.CreateSnapshotCheckpointAsync(ct);
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/// <summary>
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/// Restores the leader from a previously created snapshot, draining any pending
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/// commit-queue entries before applying the snapshot state.
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/// Go reference: raft.go DrainAndReplaySnapshot.
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/// </summary>
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public Task RestoreFromSnapshotAsync(RaftSnapshot snapshot, CancellationToken ct)
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=> Leader.DrainAndReplaySnapshotAsync(snapshot, ct);
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private RaftNode SelectNextCandidate(RaftNode currentLeader)
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{
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if (_nodes.Count == 1)
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@@ -87,5 +251,50 @@ public sealed class StreamReplicaGroup
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return candidate;
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}
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/// <summary>
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/// Applies a committed message entry, incrementing message count and sequence.
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/// Go reference: jetstream_cluster.go processStreamMsg apply.
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/// </summary>
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private void ApplyMessage(long index)
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{
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Interlocked.Increment(ref _messageCount);
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// Sequence numbers track 1:1 with applied messages.
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// Use the RAFT index as the sequence to ensure monotonic ordering.
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long current;
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long desired;
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do
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{
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current = Interlocked.Read(ref _lastSequence);
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desired = Math.Max(current, index);
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}
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while (Interlocked.CompareExchange(ref _lastSequence, desired, current) != current);
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}
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private string streamNamePrefix() => StreamName.ToLowerInvariant();
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}
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/// <summary>
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/// Status snapshot of a stream replica group.
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/// Go reference: jetstream_cluster.go stream replica status report.
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/// </summary>
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public sealed class StreamReplicaStatus
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{
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public string StreamName { get; init; } = string.Empty;
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public string LeaderId { get; init; } = string.Empty;
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public int LeaderTerm { get; init; }
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public long MessageCount { get; init; }
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public long LastSequence { get; init; }
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public int ReplicaCount { get; init; }
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public long CommitIndex { get; init; }
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public long AppliedIndex { get; init; }
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}
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/// <summary>
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/// Event args for leader change notifications.
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/// </summary>
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public sealed class LeaderChangedEventArgs(string previousLeaderId, string newLeaderId, int newTerm) : EventArgs
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{
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public string PreviousLeaderId { get; } = previousLeaderId;
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public string NewLeaderId { get; } = newLeaderId;
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public int NewTerm { get; } = newTerm;
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}
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,463 @@
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// Go parity: golang/nats-server/server/jetstream_cluster.go
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// Covers: JetStreamMetaGroup RAFT proposal workflow — stream create/delete,
|
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// consumer create/delete, leader validation, duplicate rejection,
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// ApplyEntry dispatch, inflight tracking, leader change clearing inflight,
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// GetState snapshot with consumer counts.
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using NATS.Server.JetStream.Cluster;
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using NATS.Server.JetStream.Models;
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namespace NATS.Server.Tests.JetStream.Cluster;
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|
||||
/// <summary>
|
||||
/// Tests for JetStreamMetaGroup RAFT proposal workflow.
|
||||
/// Go reference: jetstream_cluster.go:500-2000 (processStreamAssignment,
|
||||
/// processConsumerAssignment, meta group leader logic).
|
||||
/// </summary>
|
||||
public class MetaGroupProposalTests
|
||||
{
|
||||
// ---------------------------------------------------------------
|
||||
// Stream create proposal
|
||||
// Go reference: jetstream_cluster.go processStreamAssignment
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Stream_create_proposal_adds_stream_assignment()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
var group = new RaftGroup { Name = "test-group", Peers = ["p1", "p2", "p3"] };
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||||
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||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "ORDERS" }, group, default);
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||||
|
||||
var assignment = meta.GetStreamAssignment("ORDERS");
|
||||
assignment.ShouldNotBeNull();
|
||||
assignment.StreamName.ShouldBe("ORDERS");
|
||||
assignment.Group.ShouldBeSameAs(group);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Stream_create_proposal_increments_stream_count()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "S1" }, null, default);
|
||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "S2" }, null, default);
|
||||
|
||||
meta.StreamCount.ShouldBe(2);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Stream_create_proposal_appears_in_state()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "EVENTS" }, null, default);
|
||||
|
||||
var state = meta.GetState();
|
||||
state.Streams.ShouldContain("EVENTS");
|
||||
state.AssignmentCount.ShouldBe(1);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Stream delete proposal
|
||||
// Go reference: jetstream_cluster.go processStreamDelete
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Stream_delete_proposal_removes_stream()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "DOOMED" }, null, default);
|
||||
|
||||
await meta.ProposeDeleteStreamValidatedAsync("DOOMED", default);
|
||||
|
||||
meta.GetStreamAssignment("DOOMED").ShouldBeNull();
|
||||
meta.StreamCount.ShouldBe(0);
|
||||
meta.GetState().Streams.ShouldNotContain("DOOMED");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Stream_delete_with_consumers_decrements_consumer_count()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
var sg = new RaftGroup { Name = "sg", Peers = ["p1"] };
|
||||
var cg = new RaftGroup { Name = "cg", Peers = ["p1"] };
|
||||
|
||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "S" }, sg, default);
|
||||
await meta.ProposeCreateConsumerValidatedAsync("S", "C1", cg, default);
|
||||
await meta.ProposeCreateConsumerValidatedAsync("S", "C2", cg, default);
|
||||
meta.ConsumerCount.ShouldBe(2);
|
||||
|
||||
await meta.ProposeDeleteStreamValidatedAsync("S", default);
|
||||
meta.ConsumerCount.ShouldBe(0);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Consumer create/delete proposal
|
||||
// Go reference: jetstream_cluster.go processConsumerAssignment/Delete
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Consumer_create_proposal_adds_consumer_to_stream()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
var sg = new RaftGroup { Name = "sg", Peers = ["p1", "p2", "p3"] };
|
||||
var cg = new RaftGroup { Name = "cg", Peers = ["p1"] };
|
||||
|
||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "ORDERS" }, sg, default);
|
||||
await meta.ProposeCreateConsumerValidatedAsync("ORDERS", "PROCESSOR", cg, default);
|
||||
|
||||
var ca = meta.GetConsumerAssignment("ORDERS", "PROCESSOR");
|
||||
ca.ShouldNotBeNull();
|
||||
ca.ConsumerName.ShouldBe("PROCESSOR");
|
||||
ca.StreamName.ShouldBe("ORDERS");
|
||||
meta.ConsumerCount.ShouldBe(1);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Consumer_delete_proposal_removes_consumer()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
var sg = new RaftGroup { Name = "sg", Peers = ["p1"] };
|
||||
var cg = new RaftGroup { Name = "cg", Peers = ["p1"] };
|
||||
|
||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "S" }, sg, default);
|
||||
await meta.ProposeCreateConsumerValidatedAsync("S", "C1", cg, default);
|
||||
meta.ConsumerCount.ShouldBe(1);
|
||||
|
||||
await meta.ProposeDeleteConsumerValidatedAsync("S", "C1", default);
|
||||
meta.GetConsumerAssignment("S", "C1").ShouldBeNull();
|
||||
meta.ConsumerCount.ShouldBe(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Multiple_consumers_tracked_independently()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
var sg = new RaftGroup { Name = "sg", Peers = ["p1"] };
|
||||
var cg = new RaftGroup { Name = "cg", Peers = ["p1"] };
|
||||
|
||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "MULTI" }, sg, default);
|
||||
await meta.ProposeCreateConsumerValidatedAsync("MULTI", "C1", cg, default);
|
||||
await meta.ProposeCreateConsumerValidatedAsync("MULTI", "C2", cg, default);
|
||||
await meta.ProposeCreateConsumerValidatedAsync("MULTI", "C3", cg, default);
|
||||
|
||||
meta.ConsumerCount.ShouldBe(3);
|
||||
meta.GetStreamAssignment("MULTI")!.Consumers.Count.ShouldBe(3);
|
||||
|
||||
await meta.ProposeDeleteConsumerValidatedAsync("MULTI", "C2", default);
|
||||
meta.ConsumerCount.ShouldBe(2);
|
||||
meta.GetConsumerAssignment("MULTI", "C2").ShouldBeNull();
|
||||
meta.GetConsumerAssignment("MULTI", "C1").ShouldNotBeNull();
|
||||
meta.GetConsumerAssignment("MULTI", "C3").ShouldNotBeNull();
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Not-leader rejects proposals
|
||||
// Go reference: jetstream_api.go:200-300 — leader check
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Not_leader_rejects_stream_create()
|
||||
{
|
||||
// selfIndex=2 but leaderIndex starts at 1, so IsLeader() is false
|
||||
var meta = new JetStreamMetaGroup(3, selfIndex: 2);
|
||||
|
||||
var ex = Should.Throw<InvalidOperationException>(
|
||||
() => meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "FAIL" }, null, default));
|
||||
|
||||
ex.Message.ShouldContain("Not the meta-group leader");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Not_leader_rejects_stream_delete()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3, selfIndex: 2);
|
||||
|
||||
var ex = Should.Throw<InvalidOperationException>(
|
||||
() => meta.ProposeDeleteStreamValidatedAsync("S", default));
|
||||
|
||||
ex.Message.ShouldContain("Not the meta-group leader");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Not_leader_rejects_consumer_create()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3, selfIndex: 2);
|
||||
var cg = new RaftGroup { Name = "cg", Peers = ["p1"] };
|
||||
|
||||
var ex = Should.Throw<InvalidOperationException>(
|
||||
() => meta.ProposeCreateConsumerValidatedAsync("S", "C1", cg, default));
|
||||
|
||||
ex.Message.ShouldContain("Not the meta-group leader");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Not_leader_rejects_consumer_delete()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3, selfIndex: 2);
|
||||
|
||||
var ex = Should.Throw<InvalidOperationException>(
|
||||
() => meta.ProposeDeleteConsumerValidatedAsync("S", "C1", default));
|
||||
|
||||
ex.Message.ShouldContain("Not the meta-group leader");
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Duplicate stream name rejected (validated path)
|
||||
// Go reference: jetstream_cluster.go duplicate stream check
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Duplicate_stream_name_rejected_by_validated_proposal()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
await meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "DUP" }, null, default);
|
||||
|
||||
var ex = Should.Throw<InvalidOperationException>(
|
||||
() => meta.ProposeCreateStreamValidatedAsync(new StreamConfig { Name = "DUP" }, null, default));
|
||||
|
||||
ex.Message.ShouldContain("already exists");
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Consumer on non-existent stream rejected (validated path)
|
||||
// Go reference: jetstream_cluster.go stream existence check
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Consumer_on_nonexistent_stream_rejected_by_validated_proposal()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
var cg = new RaftGroup { Name = "cg", Peers = ["p1"] };
|
||||
|
||||
var ex = Should.Throw<InvalidOperationException>(
|
||||
() => meta.ProposeCreateConsumerValidatedAsync("MISSING", "C1", cg, default));
|
||||
|
||||
ex.Message.ShouldContain("not found");
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// ApplyEntry dispatch
|
||||
// Go reference: jetstream_cluster.go RAFT apply for meta group
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void ApplyEntry_stream_create_adds_assignment()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
var group = new RaftGroup { Name = "APPLIED", Peers = ["p1"] };
|
||||
|
||||
meta.ApplyEntry(MetaEntryType.StreamCreate, "APPLIED", group: group);
|
||||
|
||||
meta.GetStreamAssignment("APPLIED").ShouldNotBeNull();
|
||||
meta.StreamCount.ShouldBe(1);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ApplyEntry_stream_delete_removes_assignment()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
meta.ApplyEntry(MetaEntryType.StreamCreate, "TEMP");
|
||||
|
||||
meta.ApplyEntry(MetaEntryType.StreamDelete, "TEMP");
|
||||
|
||||
meta.GetStreamAssignment("TEMP").ShouldBeNull();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ApplyEntry_consumer_create_adds_consumer()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
meta.ApplyEntry(MetaEntryType.StreamCreate, "S");
|
||||
|
||||
meta.ApplyEntry(MetaEntryType.ConsumerCreate, "C1", streamName: "S");
|
||||
|
||||
meta.GetConsumerAssignment("S", "C1").ShouldNotBeNull();
|
||||
meta.ConsumerCount.ShouldBe(1);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ApplyEntry_consumer_delete_removes_consumer()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
meta.ApplyEntry(MetaEntryType.StreamCreate, "S");
|
||||
meta.ApplyEntry(MetaEntryType.ConsumerCreate, "C1", streamName: "S");
|
||||
|
||||
meta.ApplyEntry(MetaEntryType.ConsumerDelete, "C1", streamName: "S");
|
||||
|
||||
meta.GetConsumerAssignment("S", "C1").ShouldBeNull();
|
||||
meta.ConsumerCount.ShouldBe(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void ApplyEntry_consumer_without_stream_name_throws()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
Should.Throw<ArgumentNullException>(
|
||||
() => meta.ApplyEntry(MetaEntryType.ConsumerCreate, "C1"));
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Inflight tracking
|
||||
// Go reference: jetstream_cluster.go inflight tracking
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Inflight_cleared_after_stream_create()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "INF" }, default);
|
||||
|
||||
// Inflight should be cleared after proposal completes
|
||||
meta.InflightStreamCount.ShouldBe(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Inflight_cleared_after_consumer_create()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "S" }, default);
|
||||
|
||||
var cg = new RaftGroup { Name = "cg", Peers = ["p1"] };
|
||||
await meta.ProposeCreateConsumerAsync("S", "C1", cg, default);
|
||||
|
||||
meta.InflightConsumerCount.ShouldBe(0);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Leader change clears inflight
|
||||
// Go reference: jetstream_cluster.go leader stepdown
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Leader_change_clears_inflight()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
// Manually inspect that step down clears (inflight is always 0 after
|
||||
// synchronous proposal, but the StepDown path is the important semantic).
|
||||
meta.StepDown();
|
||||
|
||||
meta.InflightStreamCount.ShouldBe(0);
|
||||
meta.InflightConsumerCount.ShouldBe(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void StepDown_increments_leadership_version()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
var versionBefore = meta.GetState().LeadershipVersion;
|
||||
|
||||
meta.StepDown();
|
||||
|
||||
meta.GetState().LeadershipVersion.ShouldBeGreaterThan(versionBefore);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// GetState returns correct snapshot
|
||||
// Go reference: jetstream_cluster.go meta group state
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task GetState_returns_correct_snapshot()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(5);
|
||||
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "ALPHA" }, default);
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "BETA" }, default);
|
||||
var cg = new RaftGroup { Name = "cg", Peers = ["p1"] };
|
||||
await meta.ProposeCreateConsumerAsync("ALPHA", "C1", cg, default);
|
||||
await meta.ProposeCreateConsumerAsync("ALPHA", "C2", cg, default);
|
||||
await meta.ProposeCreateConsumerAsync("BETA", "C1", cg, default);
|
||||
|
||||
var state = meta.GetState();
|
||||
|
||||
state.ClusterSize.ShouldBe(5);
|
||||
state.Streams.Count.ShouldBe(2);
|
||||
state.AssignmentCount.ShouldBe(2);
|
||||
state.ConsumerCount.ShouldBe(3);
|
||||
state.LeaderId.ShouldBe("meta-1");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task GetState_streams_are_sorted()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "ZULU" }, default);
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "ALPHA" }, default);
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "MIKE" }, default);
|
||||
|
||||
var state = meta.GetState();
|
||||
state.Streams[0].ShouldBe("ALPHA");
|
||||
state.Streams[1].ShouldBe("MIKE");
|
||||
state.Streams[2].ShouldBe("ZULU");
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// GetAllAssignments
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task GetAllAssignments_returns_all_streams()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "A" }, default);
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "B" }, default);
|
||||
|
||||
var all = meta.GetAllAssignments();
|
||||
all.Count.ShouldBe(2);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// GetConsumerAssignment
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void GetConsumerAssignment_returns_null_for_nonexistent_stream()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
meta.GetConsumerAssignment("MISSING", "C1").ShouldBeNull();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task GetConsumerAssignment_returns_null_for_nonexistent_consumer()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "S" }, default);
|
||||
|
||||
meta.GetConsumerAssignment("S", "MISSING").ShouldBeNull();
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Idempotent backward-compatible paths
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Duplicate_stream_create_is_idempotent_via_unvalidated_path()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "DUP" }, default);
|
||||
await meta.ProposeCreateStreamAsync(new StreamConfig { Name = "DUP" }, default);
|
||||
|
||||
meta.StreamCount.ShouldBe(1);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Consumer_on_nonexistent_stream_is_silent_via_unvalidated_path()
|
||||
{
|
||||
var meta = new JetStreamMetaGroup(3);
|
||||
var cg = new RaftGroup { Name = "cg", Peers = ["p1"] };
|
||||
|
||||
// Should not throw
|
||||
await meta.ProposeCreateConsumerAsync("MISSING", "C1", cg, default);
|
||||
|
||||
meta.GetStreamAssignment("MISSING").ShouldBeNull();
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,309 @@
|
||||
// Go parity: golang/nats-server/server/jetstream_cluster.go:7212 selectPeerGroup
|
||||
// Covers: PlacementEngine peer selection with cluster affinity, tag filtering,
|
||||
// exclude-tag filtering, unavailable peer exclusion, storage-based ordering,
|
||||
// single replica selection, and combined policy filtering.
|
||||
using NATS.Server.JetStream.Cluster;
|
||||
|
||||
namespace NATS.Server.Tests.JetStream.Cluster;
|
||||
|
||||
/// <summary>
|
||||
/// Tests for PlacementEngine topology-aware peer selection.
|
||||
/// Go reference: jetstream_cluster.go:7212 selectPeerGroup.
|
||||
/// </summary>
|
||||
public class PlacementEngineTests
|
||||
{
|
||||
// ---------------------------------------------------------------
|
||||
// Basic selection with enough peers
|
||||
// Go reference: jetstream_cluster.go selectPeerGroup base case
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Basic_selection_with_enough_peers()
|
||||
{
|
||||
var peers = CreatePeers(5);
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("test-group", 3, peers);
|
||||
|
||||
group.Name.ShouldBe("test-group");
|
||||
group.Peers.Count.ShouldBe(3);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Selection_returns_exact_replica_count()
|
||||
{
|
||||
var peers = CreatePeers(10);
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("exact", 5, peers);
|
||||
|
||||
group.Peers.Count.ShouldBe(5);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Insufficient peers throws
|
||||
// Go reference: jetstream_cluster.go not enough peers error
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Insufficient_peers_throws()
|
||||
{
|
||||
var peers = CreatePeers(2);
|
||||
|
||||
Should.Throw<InvalidOperationException>(
|
||||
() => PlacementEngine.SelectPeerGroup("fail", 5, peers));
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Zero_peers_with_replicas_throws()
|
||||
{
|
||||
var group = Should.Throw<InvalidOperationException>(
|
||||
() => PlacementEngine.SelectPeerGroup("empty", 1, []));
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Cluster affinity filtering
|
||||
// Go reference: jetstream_cluster.go cluster affinity in placement
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Cluster_affinity_selects_only_matching_cluster()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "p1", Cluster = "us-east" },
|
||||
new() { PeerId = "p2", Cluster = "us-west" },
|
||||
new() { PeerId = "p3", Cluster = "us-east" },
|
||||
new() { PeerId = "p4", Cluster = "us-east" },
|
||||
new() { PeerId = "p5", Cluster = "eu-west" },
|
||||
};
|
||||
var policy = new PlacementPolicy { Cluster = "us-east" };
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("cluster", 3, peers, policy);
|
||||
|
||||
group.Peers.Count.ShouldBe(3);
|
||||
group.Peers.ShouldAllBe(id => id.StartsWith("p1") || id.StartsWith("p3") || id.StartsWith("p4"));
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Cluster_affinity_is_case_insensitive()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "p1", Cluster = "US-East" },
|
||||
new() { PeerId = "p2", Cluster = "us-east" },
|
||||
};
|
||||
var policy = new PlacementPolicy { Cluster = "us-east" };
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("ci", 2, peers, policy);
|
||||
|
||||
group.Peers.Count.ShouldBe(2);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Cluster_affinity_with_insufficient_matching_throws()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "p1", Cluster = "us-east" },
|
||||
new() { PeerId = "p2", Cluster = "us-west" },
|
||||
};
|
||||
var policy = new PlacementPolicy { Cluster = "us-east" };
|
||||
|
||||
Should.Throw<InvalidOperationException>(
|
||||
() => PlacementEngine.SelectPeerGroup("fail", 2, peers, policy));
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Tag filtering (include and exclude)
|
||||
// Go reference: jetstream_cluster.go tag-based filtering
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Tag_filtering_selects_peers_with_all_required_tags()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "p1", Tags = ["ssd", "fast"] },
|
||||
new() { PeerId = "p2", Tags = ["ssd"] },
|
||||
new() { PeerId = "p3", Tags = ["ssd", "fast", "gpu"] },
|
||||
new() { PeerId = "p4", Tags = ["hdd"] },
|
||||
};
|
||||
var policy = new PlacementPolicy { Tags = ["ssd", "fast"] };
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("tags", 2, peers, policy);
|
||||
|
||||
group.Peers.Count.ShouldBe(2);
|
||||
group.Peers.ShouldContain("p1");
|
||||
group.Peers.ShouldContain("p3");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Exclude_tag_filtering_removes_peers_with_excluded_tags()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "p1", Tags = ["ssd"] },
|
||||
new() { PeerId = "p2", Tags = ["ssd", "deprecated"] },
|
||||
new() { PeerId = "p3", Tags = ["ssd"] },
|
||||
};
|
||||
var policy = new PlacementPolicy { ExcludeTags = ["deprecated"] };
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("excl", 2, peers, policy);
|
||||
|
||||
group.Peers.Count.ShouldBe(2);
|
||||
group.Peers.ShouldNotContain("p2");
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Unavailable peers excluded
|
||||
// Go reference: jetstream_cluster.go offline peer filter
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Unavailable_peers_are_excluded()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "p1", Available = true },
|
||||
new() { PeerId = "p2", Available = false },
|
||||
new() { PeerId = "p3", Available = true },
|
||||
new() { PeerId = "p4", Available = false },
|
||||
};
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("avail", 2, peers);
|
||||
|
||||
group.Peers.Count.ShouldBe(2);
|
||||
group.Peers.ShouldContain("p1");
|
||||
group.Peers.ShouldContain("p3");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void All_unavailable_throws()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "p1", Available = false },
|
||||
new() { PeerId = "p2", Available = false },
|
||||
};
|
||||
|
||||
Should.Throw<InvalidOperationException>(
|
||||
() => PlacementEngine.SelectPeerGroup("fail", 1, peers));
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Peers ordered by available storage
|
||||
// Go reference: jetstream_cluster.go storage-based ordering
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Peers_ordered_by_available_storage_descending()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "low", AvailableStorage = 100 },
|
||||
new() { PeerId = "high", AvailableStorage = 10000 },
|
||||
new() { PeerId = "mid", AvailableStorage = 5000 },
|
||||
};
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("storage", 2, peers);
|
||||
|
||||
// Should pick high and mid (top 2 by storage)
|
||||
group.Peers[0].ShouldBe("high");
|
||||
group.Peers[1].ShouldBe("mid");
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Single replica selection
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Single_replica_selection()
|
||||
{
|
||||
var peers = CreatePeers(5);
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("single", 1, peers);
|
||||
|
||||
group.Peers.Count.ShouldBe(1);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Policy with all filters combined
|
||||
// Go reference: jetstream_cluster.go combined placement policy
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Combined_policy_filters_applied_together()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "p1", Cluster = "us-east", Tags = ["ssd"], Available = true, AvailableStorage = 5000 },
|
||||
new() { PeerId = "p2", Cluster = "us-east", Tags = ["ssd", "old"], Available = true, AvailableStorage = 8000 },
|
||||
new() { PeerId = "p3", Cluster = "us-west", Tags = ["ssd"], Available = true, AvailableStorage = 9000 },
|
||||
new() { PeerId = "p4", Cluster = "us-east", Tags = ["ssd"], Available = false, AvailableStorage = 10000 },
|
||||
new() { PeerId = "p5", Cluster = "us-east", Tags = ["ssd"], Available = true, AvailableStorage = 7000 },
|
||||
new() { PeerId = "p6", Cluster = "us-east", Tags = ["hdd"], Available = true, AvailableStorage = 12000 },
|
||||
};
|
||||
var policy = new PlacementPolicy
|
||||
{
|
||||
Cluster = "us-east",
|
||||
Tags = ["ssd"],
|
||||
ExcludeTags = ["old"],
|
||||
};
|
||||
|
||||
// After filtering: p1 (5000), p5 (7000) — p2 excluded (old tag), p3 (wrong cluster), p4 (unavailable), p6 (no ssd tag)
|
||||
var group = PlacementEngine.SelectPeerGroup("combined", 2, peers, policy);
|
||||
|
||||
group.Peers.Count.ShouldBe(2);
|
||||
// Ordered by storage descending: p5 (7000) first, p1 (5000) second
|
||||
group.Peers[0].ShouldBe("p5");
|
||||
group.Peers[1].ShouldBe("p1");
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Null policy is allowed (no filtering)
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Null_policy_selects_without_filtering()
|
||||
{
|
||||
var peers = CreatePeers(3);
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("nofilter", 3, peers, policy: null);
|
||||
|
||||
group.Peers.Count.ShouldBe(3);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Empty policy fields are ignored
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Empty_policy_cluster_is_ignored()
|
||||
{
|
||||
var peers = new List<PeerInfo>
|
||||
{
|
||||
new() { PeerId = "p1", Cluster = "us-east" },
|
||||
new() { PeerId = "p2", Cluster = "us-west" },
|
||||
};
|
||||
var policy = new PlacementPolicy { Cluster = "" };
|
||||
|
||||
var group = PlacementEngine.SelectPeerGroup("empty-cluster", 2, peers, policy);
|
||||
|
||||
group.Peers.Count.ShouldBe(2);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Helpers
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
private static List<PeerInfo> CreatePeers(int count)
|
||||
{
|
||||
return Enumerable.Range(1, count)
|
||||
.Select(i => new PeerInfo
|
||||
{
|
||||
PeerId = $"peer-{i}",
|
||||
Available = true,
|
||||
AvailableStorage = long.MaxValue - i,
|
||||
})
|
||||
.ToList();
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,196 @@
|
||||
// Go parity: golang/nats-server/server/jetstream_cluster.go
|
||||
// Covers: Per-stream RAFT group message proposals, message count tracking,
|
||||
// sequence tracking, leader change events, replica status reporting,
|
||||
// and non-leader rejection.
|
||||
using NATS.Server.JetStream.Cluster;
|
||||
|
||||
namespace NATS.Server.Tests.JetStream.Cluster;
|
||||
|
||||
/// <summary>
|
||||
/// Tests for StreamReplicaGroup stream-specific RAFT apply logic:
|
||||
/// message proposals, message count, last sequence, leader change
|
||||
/// event, and replica status reporting.
|
||||
/// Go reference: jetstream_cluster.go processStreamMsg, processStreamEntries.
|
||||
/// </summary>
|
||||
public class StreamRaftGroupTests
|
||||
{
|
||||
// ---------------------------------------------------------------
|
||||
// ProposeMessageAsync succeeds as leader
|
||||
// Go reference: jetstream_cluster.go processStreamMsg
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Propose_message_succeeds_as_leader()
|
||||
{
|
||||
var group = new StreamReplicaGroup("MSGS", replicas: 3);
|
||||
|
||||
var index = await group.ProposeMessageAsync(
|
||||
"orders.new", ReadOnlyMemory<byte>.Empty, "hello"u8.ToArray(), default);
|
||||
|
||||
index.ShouldBeGreaterThan(0);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// ProposeMessageAsync fails when not leader
|
||||
// Go reference: jetstream_cluster.go leader check
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Propose_message_fails_when_not_leader()
|
||||
{
|
||||
var group = new StreamReplicaGroup("NOLEAD", replicas: 3);
|
||||
|
||||
// Step down so the current leader is no longer leader
|
||||
group.Leader.RequestStepDown();
|
||||
|
||||
await Should.ThrowAsync<InvalidOperationException>(async () =>
|
||||
await group.ProposeMessageAsync(
|
||||
"test.sub", ReadOnlyMemory<byte>.Empty, "data"u8.ToArray(), default));
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Message count increments after proposal
|
||||
// Go reference: stream.go state.Msgs tracking
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Message_count_increments_after_proposal()
|
||||
{
|
||||
var group = new StreamReplicaGroup("COUNT", replicas: 3);
|
||||
|
||||
group.MessageCount.ShouldBe(0);
|
||||
|
||||
await group.ProposeMessageAsync("a.1", ReadOnlyMemory<byte>.Empty, "m1"u8.ToArray(), default);
|
||||
group.MessageCount.ShouldBe(1);
|
||||
|
||||
await group.ProposeMessageAsync("a.2", ReadOnlyMemory<byte>.Empty, "m2"u8.ToArray(), default);
|
||||
group.MessageCount.ShouldBe(2);
|
||||
|
||||
await group.ProposeMessageAsync("a.3", ReadOnlyMemory<byte>.Empty, "m3"u8.ToArray(), default);
|
||||
group.MessageCount.ShouldBe(3);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Last sequence tracks correctly
|
||||
// Go reference: stream.go state.LastSeq
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Last_sequence_tracks_correctly()
|
||||
{
|
||||
var group = new StreamReplicaGroup("SEQ", replicas: 3);
|
||||
|
||||
group.LastSequence.ShouldBe(0);
|
||||
|
||||
var idx1 = await group.ProposeMessageAsync("s.1", ReadOnlyMemory<byte>.Empty, "d1"u8.ToArray(), default);
|
||||
group.LastSequence.ShouldBe(idx1);
|
||||
|
||||
var idx2 = await group.ProposeMessageAsync("s.2", ReadOnlyMemory<byte>.Empty, "d2"u8.ToArray(), default);
|
||||
group.LastSequence.ShouldBe(idx2);
|
||||
|
||||
idx2.ShouldBeGreaterThan(idx1);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Step down triggers leader change event
|
||||
// Go reference: jetstream_cluster.go leader change notification
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Step_down_triggers_leader_change_event()
|
||||
{
|
||||
var group = new StreamReplicaGroup("EVENT", replicas: 3);
|
||||
var previousId = group.Leader.Id;
|
||||
|
||||
LeaderChangedEventArgs? receivedArgs = null;
|
||||
group.LeaderChanged += (_, args) => receivedArgs = args;
|
||||
|
||||
await group.StepDownAsync(default);
|
||||
|
||||
receivedArgs.ShouldNotBeNull();
|
||||
receivedArgs.PreviousLeaderId.ShouldBe(previousId);
|
||||
receivedArgs.NewLeaderId.ShouldNotBe(previousId);
|
||||
receivedArgs.NewTerm.ShouldBeGreaterThan(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Multiple_stepdowns_fire_leader_changed_each_time()
|
||||
{
|
||||
var group = new StreamReplicaGroup("MULTI_EVENT", replicas: 3);
|
||||
var eventCount = 0;
|
||||
group.LeaderChanged += (_, _) => eventCount++;
|
||||
|
||||
await group.StepDownAsync(default);
|
||||
await group.StepDownAsync(default);
|
||||
await group.StepDownAsync(default);
|
||||
|
||||
eventCount.ShouldBe(3);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Replica status reports correct state
|
||||
// Go reference: jetstream_cluster.go stream replica status
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Replica_status_reports_correct_state()
|
||||
{
|
||||
var group = new StreamReplicaGroup("STATUS", replicas: 3);
|
||||
|
||||
await group.ProposeMessageAsync("x.1", ReadOnlyMemory<byte>.Empty, "m1"u8.ToArray(), default);
|
||||
await group.ProposeMessageAsync("x.2", ReadOnlyMemory<byte>.Empty, "m2"u8.ToArray(), default);
|
||||
|
||||
var status = group.GetStatus();
|
||||
|
||||
status.StreamName.ShouldBe("STATUS");
|
||||
status.LeaderId.ShouldBe(group.Leader.Id);
|
||||
status.LeaderTerm.ShouldBeGreaterThan(0);
|
||||
status.MessageCount.ShouldBe(2);
|
||||
status.LastSequence.ShouldBeGreaterThan(0);
|
||||
status.ReplicaCount.ShouldBe(3);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Initial_status_has_zero_messages()
|
||||
{
|
||||
var group = new StreamReplicaGroup("EMPTY", replicas: 1);
|
||||
|
||||
var status = group.GetStatus();
|
||||
|
||||
status.MessageCount.ShouldBe(0);
|
||||
status.LastSequence.ShouldBe(0);
|
||||
status.ReplicaCount.ShouldBe(1);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Status updates after step down
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task Status_reflects_new_leader_after_stepdown()
|
||||
{
|
||||
var group = new StreamReplicaGroup("NEWLEAD", replicas: 3);
|
||||
var statusBefore = group.GetStatus();
|
||||
|
||||
await group.StepDownAsync(default);
|
||||
|
||||
var statusAfter = group.GetStatus();
|
||||
statusAfter.LeaderId.ShouldNotBe(statusBefore.LeaderId);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// ProposeAsync still works after ProposeMessageAsync
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task ProposeAsync_and_ProposeMessageAsync_coexist()
|
||||
{
|
||||
var group = new StreamReplicaGroup("COEXIST", replicas: 3);
|
||||
|
||||
var idx1 = await group.ProposeAsync("PUB test.1", default);
|
||||
var idx2 = await group.ProposeMessageAsync("test.2", ReadOnlyMemory<byte>.Empty, "data"u8.ToArray(), default);
|
||||
|
||||
idx2.ShouldBeGreaterThan(idx1);
|
||||
group.MessageCount.ShouldBe(1); // Only ProposeMessageAsync increments message count
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,309 @@
|
||||
// Go parity: golang/nats-server/server/jetstream_cluster.go
|
||||
// Covers: StreamReplicaGroup construction from StreamAssignment, per-stream RAFT apply
|
||||
// logic (processStreamEntries), checkpoint/restore snapshot lifecycle, and commit/processed
|
||||
// index tracking through the group facade.
|
||||
using NATS.Server.JetStream.Cluster;
|
||||
using NATS.Server.Raft;
|
||||
|
||||
namespace NATS.Server.Tests.JetStream.Cluster;
|
||||
|
||||
/// <summary>
|
||||
/// Tests for B10: per-stream RAFT apply logic added to StreamReplicaGroup.
|
||||
/// Covers construction from StreamAssignment, apply loop, snapshot checkpoint/restore,
|
||||
/// and the CommitIndex/ProcessedIndex/PendingCommits facade properties.
|
||||
/// Go reference: jetstream_cluster.go processStreamAssignment, processStreamEntries.
|
||||
/// </summary>
|
||||
public class StreamReplicaGroupApplyTests
|
||||
{
|
||||
// ---------------------------------------------------------------
|
||||
// Go: jetstream_cluster.go processStreamAssignment — builds per-stream raft group
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public void Construction_from_assignment_creates_correct_number_of_nodes()
|
||||
{
|
||||
var assignment = new StreamAssignment
|
||||
{
|
||||
StreamName = "ORDERS",
|
||||
Group = new RaftGroup
|
||||
{
|
||||
Name = "orders-raft",
|
||||
Peers = ["n1", "n2", "n3"],
|
||||
},
|
||||
};
|
||||
|
||||
var group = new StreamReplicaGroup(assignment);
|
||||
|
||||
group.Nodes.Count.ShouldBe(3);
|
||||
group.StreamName.ShouldBe("ORDERS");
|
||||
group.Assignment.ShouldNotBeNull();
|
||||
group.Assignment!.StreamName.ShouldBe("ORDERS");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Construction_from_assignment_uses_peer_ids_as_node_ids()
|
||||
{
|
||||
var assignment = new StreamAssignment
|
||||
{
|
||||
StreamName = "EVENTS",
|
||||
Group = new RaftGroup
|
||||
{
|
||||
Name = "events-raft",
|
||||
Peers = ["peer-a", "peer-b", "peer-c"],
|
||||
},
|
||||
};
|
||||
|
||||
var group = new StreamReplicaGroup(assignment);
|
||||
|
||||
var nodeIds = group.Nodes.Select(n => n.Id).ToHashSet();
|
||||
nodeIds.ShouldContain("peer-a");
|
||||
nodeIds.ShouldContain("peer-b");
|
||||
nodeIds.ShouldContain("peer-c");
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Construction_from_assignment_elects_leader()
|
||||
{
|
||||
var assignment = new StreamAssignment
|
||||
{
|
||||
StreamName = "STREAM",
|
||||
Group = new RaftGroup
|
||||
{
|
||||
Name = "stream-raft",
|
||||
Peers = ["n1", "n2", "n3"],
|
||||
},
|
||||
};
|
||||
|
||||
var group = new StreamReplicaGroup(assignment);
|
||||
|
||||
group.Leader.ShouldNotBeNull();
|
||||
group.Leader.IsLeader.ShouldBeTrue();
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void Construction_from_assignment_with_no_peers_creates_single_node()
|
||||
{
|
||||
var assignment = new StreamAssignment
|
||||
{
|
||||
StreamName = "SOLO",
|
||||
Group = new RaftGroup { Name = "solo-raft" },
|
||||
};
|
||||
|
||||
var group = new StreamReplicaGroup(assignment);
|
||||
|
||||
group.Nodes.Count.ShouldBe(1);
|
||||
group.Leader.IsLeader.ShouldBeTrue();
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Go: raft.go:150-160 (applied/processed fields) — commit index on proposal
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task ProposeAsync_through_group_increments_commit_index()
|
||||
{
|
||||
var group = new StreamReplicaGroup("TRACK", replicas: 3);
|
||||
group.CommitIndex.ShouldBe(0);
|
||||
|
||||
await group.ProposeAsync("msg.1", default);
|
||||
|
||||
group.CommitIndex.ShouldBe(1);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task Multiple_proposals_increment_commit_index_monotonically()
|
||||
{
|
||||
var group = new StreamReplicaGroup("MULTI", replicas: 3);
|
||||
|
||||
await group.ProposeAsync("msg.1", default);
|
||||
await group.ProposeAsync("msg.2", default);
|
||||
await group.ProposeAsync("msg.3", default);
|
||||
|
||||
group.CommitIndex.ShouldBe(3);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Go: jetstream_cluster.go processStreamEntries — apply loop
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task ApplyCommittedEntriesAsync_processes_pending_entries()
|
||||
{
|
||||
var group = new StreamReplicaGroup("APPLY", replicas: 3);
|
||||
|
||||
await group.ProposeAsync("store.msg.1", default);
|
||||
await group.ProposeAsync("store.msg.2", default);
|
||||
|
||||
group.PendingCommits.ShouldBe(2);
|
||||
|
||||
await group.ApplyCommittedEntriesAsync(default);
|
||||
|
||||
group.PendingCommits.ShouldBe(0);
|
||||
group.ProcessedIndex.ShouldBe(2);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task ApplyCommittedEntriesAsync_marks_regular_entries_as_processed()
|
||||
{
|
||||
var group = new StreamReplicaGroup("MARK", replicas: 1);
|
||||
|
||||
var idx = await group.ProposeAsync("data.record", default);
|
||||
|
||||
group.ProcessedIndex.ShouldBe(0);
|
||||
|
||||
await group.ApplyCommittedEntriesAsync(default);
|
||||
|
||||
group.ProcessedIndex.ShouldBe(idx);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task ApplyCommittedEntriesAsync_on_empty_queue_is_noop()
|
||||
{
|
||||
var group = new StreamReplicaGroup("EMPTY", replicas: 3);
|
||||
|
||||
// No proposals — queue is empty, should not throw
|
||||
await group.ApplyCommittedEntriesAsync(default);
|
||||
|
||||
group.ProcessedIndex.ShouldBe(0);
|
||||
group.PendingCommits.ShouldBe(0);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Go: raft.go CreateSnapshotCheckpoint — snapshot lifecycle
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task CheckpointAsync_creates_snapshot_at_current_state()
|
||||
{
|
||||
var group = new StreamReplicaGroup("SNAP", replicas: 3);
|
||||
|
||||
await group.ProposeAsync("entry.1", default);
|
||||
await group.ProposeAsync("entry.2", default);
|
||||
|
||||
var snapshot = await group.CheckpointAsync(default);
|
||||
|
||||
snapshot.ShouldNotBeNull();
|
||||
snapshot.LastIncludedIndex.ShouldBeGreaterThan(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task CheckpointAsync_snapshot_index_matches_applied_index()
|
||||
{
|
||||
var group = new StreamReplicaGroup("SNAPIDX", replicas: 1);
|
||||
|
||||
await group.ProposeAsync("record.1", default);
|
||||
await group.ProposeAsync("record.2", default);
|
||||
|
||||
var snapshot = await group.CheckpointAsync(default);
|
||||
|
||||
snapshot.LastIncludedIndex.ShouldBe(group.Leader.AppliedIndex);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Go: raft.go DrainAndReplaySnapshot — restore lifecycle
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task RestoreFromSnapshotAsync_restores_state()
|
||||
{
|
||||
var group = new StreamReplicaGroup("RESTORE", replicas: 3);
|
||||
|
||||
await group.ProposeAsync("pre.1", default);
|
||||
await group.ProposeAsync("pre.2", default);
|
||||
|
||||
var snapshot = await group.CheckpointAsync(default);
|
||||
|
||||
// Advance state further after snapshot
|
||||
await group.ProposeAsync("post.1", default);
|
||||
|
||||
// Restore: should drain queue and roll back to snapshot state
|
||||
await group.RestoreFromSnapshotAsync(snapshot, default);
|
||||
|
||||
// After restore the commit index reflects the snapshot
|
||||
group.CommitIndex.ShouldBe(snapshot.LastIncludedIndex);
|
||||
// Pending commits should be drained
|
||||
group.PendingCommits.ShouldBe(0);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public async Task RestoreFromSnapshotAsync_drains_pending_commits()
|
||||
{
|
||||
var group = new StreamReplicaGroup("DRAIN", replicas: 3);
|
||||
|
||||
// Propose several entries so queue has items
|
||||
await group.ProposeAsync("queued.1", default);
|
||||
await group.ProposeAsync("queued.2", default);
|
||||
await group.ProposeAsync("queued.3", default);
|
||||
|
||||
group.PendingCommits.ShouldBeGreaterThan(0);
|
||||
|
||||
var snapshot = new RaftSnapshot
|
||||
{
|
||||
LastIncludedIndex = 3,
|
||||
LastIncludedTerm = group.Leader.Term,
|
||||
};
|
||||
|
||||
await group.RestoreFromSnapshotAsync(snapshot, default);
|
||||
|
||||
group.PendingCommits.ShouldBe(0);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Go: raft.go:150-160 — PendingCommits reflects commit queue depth
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task PendingCommits_reflects_commit_queue_depth()
|
||||
{
|
||||
var group = new StreamReplicaGroup("QUEUE", replicas: 3);
|
||||
|
||||
group.PendingCommits.ShouldBe(0);
|
||||
|
||||
await group.ProposeAsync("q.1", default);
|
||||
group.PendingCommits.ShouldBe(1);
|
||||
|
||||
await group.ProposeAsync("q.2", default);
|
||||
group.PendingCommits.ShouldBe(2);
|
||||
|
||||
await group.ApplyCommittedEntriesAsync(default);
|
||||
group.PendingCommits.ShouldBe(0);
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------
|
||||
// Go: raft.go applied/processed tracking — CommitIndex and ProcessedIndex
|
||||
// ---------------------------------------------------------------
|
||||
|
||||
[Fact]
|
||||
public async Task CommitIndex_and_ProcessedIndex_track_through_the_group()
|
||||
{
|
||||
var group = new StreamReplicaGroup("INDICES", replicas: 3);
|
||||
|
||||
group.CommitIndex.ShouldBe(0);
|
||||
group.ProcessedIndex.ShouldBe(0);
|
||||
|
||||
await group.ProposeAsync("step.1", default);
|
||||
group.CommitIndex.ShouldBe(1);
|
||||
// Not yet applied
|
||||
group.ProcessedIndex.ShouldBe(0);
|
||||
|
||||
await group.ApplyCommittedEntriesAsync(default);
|
||||
group.ProcessedIndex.ShouldBe(1);
|
||||
|
||||
await group.ProposeAsync("step.2", default);
|
||||
group.CommitIndex.ShouldBe(2);
|
||||
group.ProcessedIndex.ShouldBe(1); // still only first entry applied
|
||||
|
||||
await group.ApplyCommittedEntriesAsync(default);
|
||||
group.ProcessedIndex.ShouldBe(2);
|
||||
}
|
||||
|
||||
[Fact]
|
||||
public void CommitIndex_initially_zero_for_fresh_group()
|
||||
{
|
||||
var group = new StreamReplicaGroup("FRESH", replicas: 5);
|
||||
|
||||
group.CommitIndex.ShouldBe(0);
|
||||
group.ProcessedIndex.ShouldBe(0);
|
||||
group.PendingCommits.ShouldBe(0);
|
||||
}
|
||||
}
|
||||
1376
tests/NATS.Server.Tests/Raft/RaftGoParityTests.cs
Normal file
1376
tests/NATS.Server.Tests/Raft/RaftGoParityTests.cs
Normal file
File diff suppressed because it is too large
Load Diff
Reference in New Issue
Block a user