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fix(#2398): graceful restart as one atomic DAG, not compose-and-await

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mara's review on #2436: no submit-await-submit composition, even
server-side. Adds Template::GracefulRestart (Signal -> Drain ->
StopForUpdate -> Reconcile, wanted=Up) mirroring how Restart already
does StopForUpdate -> Reconcile, plus submit::graceful_restart and
templates::graceful_restart. handle_restart_scoped now submits exactly
one DAG per agent up front for both the graceful and non-graceful
case -- no await_dags in the loop anymore.
This commit is contained in:
atlas 2026-07-14 20:21:06 +02:00 • committed by mara
commit 901ab6a779
8 changed files with 103 additions and 40 deletions
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docs/coordinator.md
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@ -78,6 +78,7 @@ container build:
rebuild(a): Prebuild(a) → StopForUpdate(a) → Swap(a) →(after-any) Reconcile(a)
graceful-stop(a): [wanted=Offline] Signal(a) → Drain(a) → Reconcile(a)
restart(a): [wanted=Up] StopForUpdate(a) → Reconcile(a)
graceful-restart(a): [wanted=Up] Signal(a) → Drain(a) → StopForUpdate(a) → Reconcile(a)
start(a): [wanted=Up] Reconcile(a) (stale rev ⇒ upgraded to rebuild)
stop(a): [wanted=Offline] Reconcile(a)
spawn(a): [wanted=Up] Create(a) → WriteDropin(a) → Reconcile(a)