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swarm-ci-runner: run the forge CI runner as a swarm service

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The CI runner was a hive deploy module: hive-ci.nix ran it beside the
forge, and hive-c0re registered it through the forge's admin API with
the `core` token, writing the registration token through hive-priv. It
could only run on the forge's host, and it kept an admin-scoped forge
token on a hive.

Now the runner is a swarm service:

- swarm-ci-runner.nix runs it in a `swarm-ci-runner` container on the
  host that sets deploy.ci-runner.enable, reaching the forge by name.
  It needs neither the forge nor a hive there.
- swarm-controller reads the forge's runner registration token with its
  own admin token and writes it to swarm/services/ci-runner/
  registration-token whenever it differs from what it last wrote. Its
  grant on that path is create/update only.
- The runner's own leaf (CN swarm-ci-runner, role and policy of the same
  name) reads that one path. swarm-bao-ci-runner.service fetches it into
  the runner's EnvironmentFile and restarts the runner on a change.
- A pre-start step removes .runner when the daemon's journal since its
  last start holds Forgejo's "unregistered runner" refusal (the daemon
  exits 1 when its startup Declare gets it), or when .runner names
  another forge address; upstream's pre-start step then registers again.

Removed from the hive side: hive-ci.nix and deploy.forgejo.ci.*,
forge/ci_runner.rs, PrivRequest::RegisterCiRunner and its handler and
ReadWritePaths entry, InfraContainer::Ci with hivectl's --ci and the
dashboard's hive-ci journal entry, HYPERHIVE_FORGE_CI_ENABLED, and
read:admin,write:admin from CORE_TOKEN_SCOPES: nothing else in hive-c0re
calls /api/v1/admin/*. The old ci options, under both swarm.forge.ci and
deploy.forgejo.ci, now fail evaluation naming deploy.ci-runner.

The forge's half of the old ci.enable, the actions/checkout mirror and
DEFAULT_ACTIONS_URL = self, is deploy.forgejo.actionsFromSelf.

Closes #4954
This commit is contained in:
atlas 2026-10-05 02:25:05 +02:00 • committed by mara
commit e2da5509ae
60 changed files with 1088 additions and 1201 deletions
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13
docs/swarm/services.md
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@ -221,3 +221,16 @@ has one either way, reached by its swarm name through the gateway.
Agent-side configuration, and what a hive's own collector does, are in
[`../scheduler/observability.md`](../scheduler/observability.md).
### CI runner
One Forgejo Actions runner, in a `swarm-ci-runner` container on the host that
sets `deploy.ci-runner.enable`. It doesn't derive from `allSwarmServices`: a
runner executes pull-request code, so running one is a decision of its own.
It needs neither the forge nor a hive on its host. It reaches the forge at
`https://<swarm.forge.domain>`, and registers with the token swarm-controller
publishes to the secret store, which it reads under its own `ci-runner` leaf.
On a host without the store, that leaf is the one file to copy. Registration,
the container and the threat model are in
[`../scheduler/ci.md`](../scheduler/ci.md).