fix: stop artifact uploads depending on the cache server reaching Gitea (#1216)

Cache v2 makes the cache server the `ACTIONS_RESULTS_URL` origin, so artifact calls arrived there and were proxied on to Gitea, failing whenever it could not reach the instance.

- Artifact calls are answered with a redirect, so the cache server opens no connection to Gitea. A scheme change or an untrusted instance is still proxied, but there the cache server is the runner itself, which already reaches Gitea.
- Failures answer in twirp, not an empty `502` that clients report as `Unexpected end of JSON input`.
- `cache.v2: false` really points artifacts at Gitea now.
- Cache reservations are bound to the job that made them, so two jobs saving one key cannot commit against each other's upload, and a retry after a lost answer no longer fails a saved entry.
- The toolkit patch, which edits the GitHub-host check out of an action's bundle, was left in the shared checkout where a job running with `runner.patch_actions: false` could inherit it. It is put back after the job's copy.
- `exec` names an origin for the cache v2 it advertises, and masks its runtime token.

Behaviour changes: `no_proxy` no longer exempts `cache.external_server`, and `cache.enabled: false` also stops external registration.

Fixes https://gitea.com/gitea/runner/issues/1208
Fixes https://gitea.com/gitea/runner/issues/1211

Assisted by Claude (Opus 5).

Reviewed-on: https://gitea.com/gitea/runner/pulls/1216
Reviewed-by: bircni <bircni@icloud.com>
Co-authored-by: silverwind <me@silverwind.io>
This commit is contained in:
silverwind
2026-09-08 18:45:10 +00:00
committed by bircni
parent ff9965e940
commit 2ed8cdb76e
22 changed files with 533 additions and 82 deletions
+5 -4
View File
@@ -139,7 +139,8 @@ runner:
# job_completed: ''
cache:
# Enable the built-in cache server (used by actions/cache and similar actions).
# Enable caching (used by actions/cache and similar actions). Off means no built-in server is
# started and no job is registered with an external_server either.
#enabled: true
# Directory where cache blobs are stored on disk. Default: $HOME/.cache/actcache
# Ignored when external_server is set.
@@ -176,9 +177,9 @@ cache:
# until its cache entry expires or is manually removed.
#offline_mode: false
# Serve the actions cache service v2 API. The actions that use it refuse any host they do not
# take for GitHub, so reaching it means editing that check out of their own bundle, undone
# whenever it is downloaded again. That edit is made either way, this only governs the API
# advertised. A bundle that does not match is left alone.
# take for GitHub, so reaching it means editing that check out of their own bundle, put back
# after the copy into the job. That edit is made either way, this only governs the API
# advertised. A bundle that does not match is left alone. With v2, uploads need a reachable cache.
#v2: true
# How the cache server discards entries, ignored when external_server is set since that
# server applies its own. Leave a setting out for its default; 0s or 0 turns the three