5 Commits

Include renames

Author	SHA1	Message	Date
bvandeusenandClaude Opus 5	445164c852	feat: one number per lane — the cap — and the autoscaler is the mechanism (4295) ... Operator, 2026-09-23: *"auto should be always on, not a setting, so that idle instances quiet down when not running. the number that is visible and something the user can tweak and manage should be the cap itself the number of running workers is handled by the autoscaling function which is always on."* They are right, and the reason it was not built this way is worth stating: the manual dial came first (steps 2-4) and the autoscaler came last (step 7), as an opt-in BESIDE a control that already existed. Nothing ever asked whether the dial should still exist once something could move it automatically. Each step was defensible; the result was three operator settings over one number. ## `slots`, `enabled` and `autoscale` are gone `slots` was a MEASUREMENT wearing a preference's clothes. How many workers a lane runs is read live and moved every minute; storing it meant the operator had to keep two numbers in agreement and the autoscaler had to be told it was allowed to touch one of them. `autoscale` gated the mechanism behind a choice, so a lane nobody opted in never gave its workers back — which is why an idle instance never quieted down. `enabled` is derived: a cap of zero means no consumers. "Off" and "may use no workers" were two spellings of one fact, stored separately, free to disagree. ## Two sweeps become one `reconcile_lanes_sync` drove the pool to the stored `slots`; `autoscale_lanes_ sync` moved it away from that same number; and most of step 7's hardest reasoning — a stored value that is a FLOOR, a target of `max(stored, current)` — existed only to stop them fighting. Delete the stored number and the problem is not solved, it is absent. `size_lanes_sync` runs every minute and owns both consumers and pool size. It also subsumes what the reconcile was for: a worker restarted at its ENV concurrency is corrected on the next tick rather than after five. Growth is immediate, shrink is one worker per tick. Deliberately asymmetric — "always on" is only pleasant if the ramp keeps up, and +1/minute would take four minutes to answer a burst. Being one worker too large for a minute costs a sleeping process; being too small costs work not happening. For ML the asymmetry matters most: every new slot reloads a multi-GB model, so the slow shrink is what stops a quiet patch from paying that cost again a minute later. ## The caps ship at one, and zero for ML Per the operator. Conservative on purpose — and a conservative default nobody knows how to raise is just a slow product, which is the other half of what they asked for: "there needs to be something that tells the user to bump those numbers to improve processing rate or they'd never know the controls exist." So a lane running everything its cap allows while work piles up says so, in its own row, with the headroom named: *"4,060 waiting and all 1 worker busy. Raise the cap to run more at once — this machine allows up to 7."* It fires only when raising the cap would actually help. Not when the lane is keeping up, not when the sizing pass has room it has not taken, and not at the machine ceiling — where "raise the cap" is advice nobody can take. ## Migration 0105 rewrites the caps rather than carrying them The old defaults (4/2/2/1) bounded a manual control and were loose because moving within them was the ordinary act. The number now means "the most workers this lane may use", which is a different promise; carrying the old figure over would quadruple the worker lane on every existing install at the moment this deploys. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LVjrnpQjRgHdvq95rASoiR	2026-09-23 12:48:22 -04:00
bvandeusenandClaude Opus 5	a01165365b	feat: a saturated lane can grow itself, within the cap the operator set (4297) ... Milestone 422 step 7 — the one sweep in this milestone that decides rather than obeys, so it is off until a lane is opted in, bounded by the operator's cap, floored at the operator's value, and it reports every decision including the ones where it did nothing. Growth needs BOTH halves: all slots busy AND a backlog. Depth alone means celery is about to pick those up and growing would add idle children (#1253 is that bug in the GPU agent); saturation alone means the lane is busy with exactly as much work as exists. The backlog is depth PLUS reserved, because celery prefetches and LLEN reads 0 while a worker holds thirty tasks in memory — the case an LLEN-only autoscaler misses entirely, and the reason step 2 plumbed `reserved` through. The two sweeps had to be taught not to fight. The reconcile drives every lane to its stored slots every five minutes, which would have reverted each grow on the next tick: grow, revert, grow, revert, forever. For an autoscaling lane the stored value is now a FLOOR — restored when a lane falls below it, never taken back above it. The operator's "a task that runs for x concurrent time" idea stays a UI warning rather than a trigger: a long task does not finish sooner because the lane gained a slot, so scaling on it would spend memory to change nothing. Read from `task_run` on our own wall clock, not celery's `time_start`, which is the WORKER's monotonic clock and would produce a duration that is meaningless in the direction that matters — plausible. Caught while reading it back: the first version read the stored slots as the CURRENT pool. The autoscaler never writes that row, so every tick would have proposed floor+1 — resizing nothing, reporting `grew` anyway (a replica already past the target is issued no message and reports success), and capping the lane one slot above its floor forever while claiming otherwise. It now reads the live pool and keeps the stored value purely as the floor, and the tests fix the two to different numbers so an equal-fixture pass cannot hide it again. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LVjrnpQjRgHdvq95rASoiR	2026-09-22 10:05:43 -04:00
bvandeusenandClaude Opus 5	ecbd325437	feat: an optional lane says it is optional, and what enabling it costs (4296) ... Operator, 2026-09-22: "since the ml-worker is optional it should be shown as such in the UI and have a warning about what it does and that it pulls the models and what models and their projected size and ram requirements to run." The card previously said "a few GB, once" — a number sourced from nothing, which is exactly the hand-wave I had flagged in this step's own survey log as something that should be measured rather than asserted. ONE FACT CORRECTED WHILE WRITING THE COPY. I had named the lane "ML tagging". It downloads an EMBEDDER: google/siglip-so400m-patch14-384. WD14 tagging is the GPU agent's job — celery_app.py:5 still names both, but that has been stale since B3 (#1238), when the agent took over and this lane was left as the CPU embed fallback for stacks running no agent (see MLSettings.cpu_embed_enabled). Telling someone the lane "does tagging" would have been wrong in exactly the way this request exists to prevent. The facts are structured data on the lane, not prose in a component: ModelRequirement(repo, approx_download_bytes, approx_resident_bytes, measured). The API carries them; the card renders them. Numbers come from the system, wording from the UI. ML_BYTES_PER_SLOT IS NOW DERIVED from that requirement rather than stated separately. They have to be one number: the figure quoted to the operator before they enable the lane and the figure the cap enforces. Two copies could disagree, and the UI would promise a slot the cap then refuses. `measured=False` travels with the numbers and the card renders "about". They are estimates from the checkpoint's parameter count and dtype — ~877M params at fp32 is ~3.5GB of weights — not from a build. This decides whether someone's server survives, so it is labelled rather than rounded into something that reads like a fact. A test asserts the flag is false, to be flipped in the same commit that records a real measurement. The card now shows: an "optional" chip in the row itself (someone scanning the table should not have to enable a lane to learn it was never required), and before the switch, what the lane does, that you only need it if you are NOT running the GPU agent, the repo id, the download size, the per-slot RAM, and why the ceiling is what it is — including saying plainly when a box has too little memory to run it at all. Keyed on the lane's own `optional` flag, not on the name 'ml', so a second optional lane gets the same treatment without anyone remembering to add it. A test asserts no REQUIRED lane declares a model: if one ever needs a download, it stops being required. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LVjrnpQjRgHdvq95rASoiR	2026-09-22 08:45:22 -04:00
bvandeusenandClaude Opus 5	172e33de9a	feat: run web and every worker lane in one container (4295) ... Milestone 422 step 5. `docker compose -f docker-compose.single.yml up -d` gives three containers — FabledCurator, Postgres, Redis — where the stack previously needed seven. THE MULTI-SERVICE STACK IS KEPT. docker-compose.yml still runs the five app services separately and remains the right shape for a Swarm deployment spread across hosts, where per-service rolling rollback and placement constraints matter. This adds a compose file; it deletes none. `entrypoint.sh all` GENERATES the supervisord config from worker_lanes.LANES and execs it as PID 1. Generated rather than checked in because a static .conf would spell out each lane's -Q list, making a FIFTH hand-kept copy of the queue names — after celery_app.task_routes and the three collapsed in steps 1, 2 and 4. Every one of those had already drifted when found. Generating gives a stronger guarantee than "they match today": a lane added to LANES gets a process, and a queue cannot end up with no consumer because someone missed a file. supervisord over s6-overlay: one pip dependency on an image already Python, with per-program stop timeouts and stopasgroup. The process-group part is not a detail — celery's prefork pool forks children, and a TERM reaching only the parent leaves them orphaned holding tasks. s6's advantage (PID-1 signal and zombie handling) comes from `init: true` instead. Nothing in FC talks to the supervisor, so the choice is reversible without touching product code. FOUR LANES, NOT FIVE. The ml lane is skipped: torch and the ML requirements live only in Dockerfile.ml until step 6 merges the images, so an `ml` program here would fail to import on every restart forever. `--with-ml` is the flag step 6 turns on. THREE BUGS FOUND BY READING IT BACK, none of which the first tests caught: 1. `environment=CELERY_QUEUES=default,import,thumbnail,download` — supervisord parses that key as a COMMA-separated list, so it reads as CELERY_QUEUES=default plus three malformed entries and the worker lane would have consumed only `default`. Silent: the worker starts, reports healthy, never picks up an import. Now quoted, and the test asserts the quoted form rather than the bare substring, which passed either way. 2. The generator emitted `entrypoint.sh <lane.name>`, but `maintenance_long` is not a role — compose runs it as the plain `worker` role with different queues. Lane now carries `entrypoint_role`, and a test reads entrypoint.sh to assert every role a lane names actually exists. 3. The `scheduler` role hardcoded --concurrency=1, ignoring CELERY_CONCURRENCY. Harmless while only compose started it and set none; with a generated value being passed, the lane would have sat at 1 until the reconcile noticed, with nothing saying why. The healthcheck asserts BOTH halves — hypercorn answers and every configured lane is answering the broker. That is the failure mode consolidation creates: docker can no longer see the lanes as separate services, so a web-only check would report a healthy container with every lane inside it dead. It deliberately ignores the `enabled` flag: a disabled lane still has a running process with its consumers cancelled, and marking the container unhealthy for turning tagging off would be wrong. stop_grace_period 200s, sized to the slowest lane (maintenance_long at 180s) rather than the average, with a test asserting no program's stopwaitsecs can exceed what compose allows. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LVjrnpQjRgHdvq95rASoiR	2026-09-22 08:32:27 -04:00
bvandeusenandClaude Opus 5	84f13135ce	feat: worker lanes become rows — slots, a settable cap, a derived ceiling (4291) ... Milestone 422 step 1. The data model the rest of the milestone reads. No behaviour change: nothing consumes these rows yet, and every lane still boots at its CELERY_CONCURRENCY env value. Three numbers, not two, per the operator's distinction — the derived value is a cap ON the cap: slots <= slots_cap <= derived_ceiling (live) (operator) (computed) They can always lower their own cap; they cannot raise it past what the container can hold. The ceiling is never stored, so a row written on a 32GB host and later run in a 4GB container is bounded by the 4GB. `services/worker_lanes.py` is the one place that knows the lane set. `models/worker_lane.py` holds only what an operator may change. Two deviations from the step as written, both deliberate: QUEUES ARE NOT A COLUMN. The step body said the row carries its `-Q` list, but a lane's queues are decided by celery_app's task_routes, not by preference — an operator cannot move a backup off maintenance_long. Storing them would create a row that can contradict the routing table, with nothing to notice until a queue had no consumer. So queues are code, slots are data. `test_every_routed_queue_has_a_lane_that_serves_it` reads the real routing table and fails if a route is ever added without a lane. ROLE_NAMES IS NOW DERIVED, not left alone. It was a hand-kept second copy of "queue set -> display name" and had already drifted: maintenance_long is a live lane with four task routes and a dedicated worker in the operator's stack, and the roster did not know its name — so the System tab labelled it `Worker (maintenance_long)`. Adding a lane table beside it would have made three copies. The ceiling honours cgroup limits rather than the host's. `os.cpu_count()` reports the HOST's cores from inside a container, so a 4-core quota on a 32-core host would otherwise offer 32 slots — and the operator's own stack sets `cpus: '4.0'` on ml-worker, so that is real configuration, not a hypothetical. Memory reads cgroup v2 then v1, and recognises v1's PAGE_SIZE-aligned LONG_MAX sentinel by magnitude rather than treating it as petabytes. Every uncertain case fails LOW. An unreadable limit yields UNKNOWN_CEILING, never unlimited — not knowing how much memory there is must not read as plenty. A box too small to hold one model beside the web process gets an ML ceiling of 0 rather than a floor of 1: offering a slot that OOMs the container the first time it is used is exactly what this exists to prevent. ML_BYTES_PER_SLOT is 4 GiB and is UNMEASURED — flagged as such in the code, with the method for replacing it with a real figure. It decides whether a stranger's server survives enabling tagging, so it errs toward refusing a slot that would have fitted. Seeded one-of-each with ml at 0 and disabled (alembic 0103). ML off is step 6's requirement arriving early: enabling the lane is what triggers the SigLIP download, and rule 164 permits a runtime fetch only for a feature that is optional and clearly off. The seed values are literals rather than an import of LANES — a migration is a statement about one moment, and importing the live defaults would silently change what this revision does on a fresh database in 2027. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LVjrnpQjRgHdvq95rASoiR	2026-09-22 07:48:25 -04:00