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48108a3569 |
fix: a lane that is OFF was not attributable to itself (4295)
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Operator, 2026-09-23: *"clean up the stale service_seen rows"*.
**They were not stale.** They were phantoms, written on purpose, and they will
come back on every install that turns a lane off — so the rows are the smaller
half of this.
A celery worker was attributed to its lane by the queues it was CONSUMING. A
lane at cap 0 has its consumers cancelled, so it answers `active_queues()`
with an empty list, matches no lane, and is dropped. Three consequences, all
on the operator's screen at once:
1. The lanes table reported the lane **not answering** — the signal for a
crashed worker, not for one the operator turned off.
2. The roster grew a phantom row named **`Worker ()`** — the empty queue set
rendered as a display name — shown "running" beside the real lane's row
going stale, because nothing updated it any more.
3. **The container went unhealthy.** `healthcheck._lanes_ok` requires every
lane present. ML ships at cap 0, so a fresh install was permanently
unhealthy and Swarm restarts an unhealthy task forever.
That third one is the severe one, and its docstring asserted the opposite of
what the code did — *"a disabled lane still runs its process with its
consumers cancelled, so it answers inspect and is healthy"*. It answers. It
was not attributed. A comment can be right about the intent and wrong about
the program, and this one had been wrong since the consolidated container
shipped.
`worker_lanes.lane_for_node` attributes by NODE NAME instead: identity travels
with the process rather than with what it happens to be doing.
`gen_supervisord` already sets `CELERY_NODENAME={lane.name}` per program — the
information was there and nothing read it. Falls back to the queue set for a
deployment that names no node, and `docker-compose.yml` now sets one per
service so the multi-service stack gets it too.
The roster keys on the LANE's queue set when the node resolves, which is the
same string the row already had while it was consuming — so an existing row
keeps updating rather than a second one appearing.
Migration 0106 deletes the one key the bug produced, `celery:`. Deliberately
NOT a retention sweep: the roster never forgets on purpose, so a quiet row is
what it is FOR, and only a row that cannot correspond to anything real is safe
to remove. An `agent:agent` row, if one exists, is left alone — nothing here
can tell an abandoned agent id from a second agent that is genuinely down, and
hiding a dead GPU agent is the one thing the roster must not do.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LVjrnpQjRgHdvq95rASoiR
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efde3b188f |
refactor: the image carries its own healthcheck and picks it by role (4295)
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Operator, 2026-09-23: *"why isn't the healthcheck built into the image or
base on what command runs if one is passed in. why is it manually declared in
the stack here."*
No good reason. The container is the only thing that knows what it was asked
to run, and every compose file, stack file and README had to restate it:
web -> urllib /api/health
worker -> celery inspect ping -d celery@$HOSTNAME
all -> both, for every lane
Three checks written by hand, once per service, in every file anyone ever
wrote — none of them wrong until a role changed, and all of them silently
wrong after. The same duplication the lane table exists to remove one level
down, and I built it without noticing.
`entrypoint.sh` now records the role it started. The Dockerfile declares ONE
`HEALTHCHECK` that reads it and asks the right question: HTTP for web, a
self-addressed celery ping for a worker lane, both-for-every-lane for `all`,
and nothing for shell/alembic, which are one-shot and have no liveness to
probe. `docker-compose.single.yml` and the consolidated stack declare none.
A service that wants something else can still declare its own; docker prefers
it, so the escape hatch is the default docker behaviour rather than a flag.
Two details that are load-bearing:
* The role is written ONCE, by the outermost invocation. `all` starts the
other roles through this same script under supervisord, and a child
overwriting the container's role would turn the composite check into a
web-only one — silently, and only on the consolidated path. FC_ROLE is
exported so a child sees it set and skips.
* The celery ping is addressed to THIS node, not a bare ping. A bare one is
answered by any worker on the broker, so in a stack with replicas a dead
container would report healthy for as long as a sibling lived — the check
would be measuring the cluster rather than the container it is inside.
`healthcheck_all.py` is deleted; its two probes moved into the dispatcher
rather than being a second copy beside it.
An unrecorded role PASSES. The entrypoint always writes the file, so the only
way to miss it is bypassing the entrypoint — a debugging shape, where a check
that cannot tell what it is looking at must not assert the thing is broken
(snippet #3969). Said on stdout rather than assumed.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LVjrnpQjRgHdvq95rASoiR
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