The default decider restarts a faulting child immediately and without limit, and
the hook makes every restart do ShutdownAsync+InitializeAsync+SubscribeAsync, so a
driver faulting on every value became a reconnect storm. Per-driver last-reprovision
stamp + DefaultReprovisionBackoff (10s, matched to DefaultReconnectInterval);
a held request is re-delivered by a single per-driver timer carrying the original
incarnation ref, so the F2 identity check still applies.
Seen RED with the backoff disabled: InitializeCount == 3 (second applied
immediately) where the test requires 2-then-3.
Also: the _children.Keys union-arm test (seeder gained taglessDrivers) and the
_desiredByDriver xmldoc note that it lingers on last-known-good after a failed apply.
New docs/security.md section "Mesh gRPC ingress is AllowAnonymous by design"
(archreview 03/S14): what the cookie FallbackPolicy covers, why it can block a
correctly-PSK'd call before the interceptor's verdict matters, why the
AllowAnonymous opt-out is safe (all five interceptors fail-closed), the
affected-endpoint table (fused-vs-driver-only distinction), and the two
standing guards (MeshGrpcAnonymousMetadataTests, MeshGrpcMapConventionTests)
plus the auth-stack/driver-only boundary tests.
One cross-reference line each in docs/Configuration.md (§MeshTransport,
§ConfigSource/ConfigServe) and docs/Telemetry.md, so an operator reading
about the listener ports meets the constraint where they'd look for it.
A ReprovisionRequested in flight from an old incarnation could reach the NEW child
after HandleRestartDriver swapped it in. In Connecting that child DOES handle
InitializeRequested, so it started a second concurrent InitializeAsync, racing the
#527 dispose-before-overwrite.
Seen RED: InitializeCount == 2 on a child held in Connecting by a gated init
(an already-connected child swallows InitializeRequested and passes vacuously).
MeshGrpcMapConventionTests - source-scan of Program.cs (solution-root walk,
following FlushLoggingConventionTests.cs's idiom): zero direct
MapGrpcService</MapZbLocalDbSync( occurrences, exactly one
MapOtOpcUaMeshGrpcServices( call.
Complements the endpoint-metadata census (T1-T3): the census catches a map
added to MeshGrpcEndpoints without the AllowAnonymous convention, but cannot
see a map that bypasses the helper and goes straight into Program.cs - that
shape never reaches MapOtOpcUaMeshGrpcServices at all. Verified red against
the pre-T1 Program.cs (five inline map sites, zero mapper calls) and green
against the current extracted form.
The alarm subscribe gated on 'a handle exists', which is correct for an idempotent
re-push and wrong for a deploy that widens/narrows the set. Combined with the
spawn-time desired set, a respawning deploy could latch the PREVIOUS revision's
alarm refs for the life of the connection; sourceNodeIds-filtering drivers
(OpcUaClient/AbCip/Focas) would never deliver the new alarm.
Seen RED: LastSubscribedAlarmRefs stayed [alarmX] after a deploy widening to
[alarmX, alarmY].
Security__Auth__DisableLogin: "${OTOPCUA_DISABLE_LOGIN:-true}" on central-1
and central-2 - byte-identical default behaviour, verified via `docker
compose config` both unset (resolves "true") and with
OTOPCUA_DISABLE_LOGIN=false (resolves "false").
DisableLogin's always-succeeding handler, registered under the cookie scheme
name, masks the AdminUI cookie FallbackPolicy entirely - which is exactly how
03/S14 (the FallbackPolicy blocking every mesh gRPC call on a login-enabled
admin node) survived seven phases of prior live gates that all ran with the
default. The production-faithful mode is now a one-variable flip instead of
an edit-and-remember-to-revert; header comment names the flip and the LDAP
users it needs (archreview 03/S14, R3-01 T8).
MeshGrpcDriverOnlyPipelineTests - the driver-role shape (no AddOtOpcUaAuth, no
UseAuthentication/UseAuthorization at all) behaves identically to the fused
shape's T4 positive/negative tests for NodeCommandService and
TelemetryStreamService: a correctly-keyed call succeeds, a no-key call gets
the interceptor's PermissionDenied + detail string.
Also asserts the STRUCTURAL reason it is unaffected - no
IAuthorizationPolicyProvider registered at all - so a future "register auth
everywhere for consistency" change fails this test before it ever reaches a
live site outage. Confirmed (by temporarily swapping in the pre-T2/T3 mapper)
that this class passes identically on both builds: driver-only nodes were
never exposed to 03/S14 in the first place, with or without
.AllowAnonymous().
Extends MeshGrpcAuthStackTests (T5): a no-bearer or wrong-bearer call to
DeploymentArtifactService.Fetch, TelemetryStreamService.Subscribe and
NodeCommandService.Execute fails with the INTERCEPTOR's detail string
("Config-serve authentication failed.", "Telemetry stream authentication
failed.", "Node command authentication failed."), asserted alongside the
status code rather than in place of it - the vacuity trap the plan calls out
(ConfigServeAuthInterceptor throws Unauthenticated, and Grpc.Net.Client can
map an HTTP 401 to the same status, so status alone would not discriminate a
broken build).
Verified red-then-green against the T1 (pre-AllowAnonymous) mapper: all 6 new
theory cases fail there with StatusCode.Internal ("HTTP/2 server reset the
stream, PROTOCOL_ERROR") instead of Unauthenticated/PermissionDenied - the
cookie challenge breaking the h2c stream before any gRPC trailers are
written, never a clean auth denial. That is the exact signature the live
gate (T10) should grep for; recorded in the class remarks.
MeshGrpcAuthStackTests - the CI-shaped guard 03/S14 asked for. A real
AddOtOpcUaAuth(config) + UseAuthentication/UseAuthorization pipeline (cookie
scheme, DisableLogin=false, EnvironmentName=Production) with the production
interceptor set, driving DeploymentArtifactService.Fetch,
CentralCommandService.ReportApply and NodeCommandService.Execute through
MapOtOpcUaMeshGrpcServices.
Verified red-then-green by hand: with the T1 (pre-AllowAnonymous) mapper
swapped in, all three positive calls fail with
"HTTP/2 server reset the stream, PROTOCOL_ERROR" (RpcException/Internal) -
the cookie challenge breaking prior-knowledge h2c, not a clean auth denial.
With the current mapper (T2/T3) all three succeed. That asymmetry is the only
thing distinguishing the two builds; every other assertion here (cookie
handler identity, the falsifiability control) is unchanged by the fix and
proves nothing on its own.
Falsifiability control: LocalDbSyncService is mapped directly (bypassing
MapOtOpcUaMeshGrpcServices) with no .AllowAnonymous(), and a correctly-shaped
call to it is refused - proving the fixture's auth stack is genuinely live,
not accidentally permissive.
Crash seam: the planned null-Snapshot OnDataChange (no SupervisorStrategy fallback needed).
Seen RED with T6 reverted: InitializeCount 1, not 2 — with a preceding ShutdownCount>=1
assertion proving the restart really happened, so the red is not ambiguous with 'never crashed'.
Seen RED against a T3-reverted build: all 4 failed, Created[1].SubscribeCount == 0
on the headline case. 20x isolation run green after the fix was restored.
MapZbLocalDbSync returns IEndpointRouteBuilder, not an IEndpointConventionBuilder,
so .AllowAnonymous() cannot be chained onto it the way the other four mesh maps
are (T2). app.MapGroup(string.Empty).AllowAnonymous().MapZbLocalDbSync() carries
the same convention while leaving the gRPC route pattern byte-identical -
verified directly (LocalDbSync_AllowAnonymousGroup_LeavesTheRoutePatternByteIdentical).
The census's RealMethodEndpoints filter had to move off a "route pattern starts
with /" heuristic to an exact-route-pattern-set match: inside the empty-prefix
group, grpc-dotnet's own "Unimplemented service"/"Unimplemented method" fallback
endpoints also gain a leading "/", so the heuristic let them back in and
over-counted (caught by DriverOnly_WithASyncPort_AlsoMapsTheLocalDbSyncEndpoint
and LocalDbSync_AllowAnonymousGroup_LeavesTheRoutePatternByteIdentical going red
against the naive filter before this fix).
All five mesh gRPC endpoints now carry IAllowAnonymous (archreview 03/S14, T3).
.AllowAnonymous() on DeploymentArtifactGrpcService, CentralCommandGrpcService,
TelemetryStreamGrpcService and NodeCommandGrpcService — the four MapGrpcService
maps that are chainable. On a login-enabled admin node the global cookie
FallbackPolicy (RequireAuthenticatedUser) applies to every endpoint without
explicit authorization metadata, gRPC included; the PSK bearer interceptors run
INSIDE the endpoint invocation, strictly after that middleware, so a
correctly-keyed node call was challenged before the interceptor's verdict could
matter. Safe because all four interceptors fail closed on an unset key.
The census now asserts IAllowAnonymous on all four (red before this change,
green after) plus a scope guard proving the opt-out never leaks onto an
unrelated endpoint. MapZbLocalDbSync (T3) is not chainable the same way and is
asserted absent here on purpose, so this test cannot start passing for the
wrong reason once T3 lands.
Behaviour-preserving: Program.cs:743-784 collapses to a single call, same gates,
same order, every existing per-map rationale comment carried over. A new
endpoint-metadata census (MeshGrpcAnonymousMetadataTests) drives the SAME
production mapper across all three role shapes (admin-only / driver-only /
fused), so the guard can never assert a shape production no longer has -
archreview 03/S14, T1.
Joseph Doherty