The periodic reconcile runs ExistingOnly — merely listing a catalog
manifest must never install an app — and its only absent-container
recovery keyed on the last running-names snapshot, which ages out after
a few daemon restarts. An absent member of an installed stack then stays
absent forever: .38 ran indeedhub with no minio/postgres for days, nginx
down on 'host not found in upstream "minio"', and nothing ever put the
members back.
A live sibling container is proof the stack is installed on this node,
so an absent member is now treated as a hole to repair, not a choice to
respect: the recovery guard also fires when another member of the same
stack (app_ops::stack_member_app_ids) has a container in any state.
A stack with no containers at all is left untouched, and sibling app ids
resolve through the loaded-manifest container names (immich-postgres
runs as immich_postgres).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
