Zettat123 ef6ca957b5 fix(artifactcache): preserve cache key case to stop redundant uploads (#947)
## Summary

`artifactcache.Handler` was lowercasing cache keys before storing and returning them. This caused actions like `actions/setup-go` to treat every restore as a partial hit and re-upload the cache on every job run.

Similar issue: [act#2497](https://github.com/nektos/act/issues/2497)

## Root Cause

These actions build cache keys that include `RUNNER_OS` (e.g. `setup-go-Linux-x64-...` See [setup-go/cache-restore.ts](78961f6f84/src/cache-restore.ts (L11-L51)) ). In `gitea/runner`,  `RUNNER_OS` is always `Linux` by default (See https://gitea.com/gitea/runner/search?q=RUNNER_OS).

These actions decide whether to save the cache data in their post step using **strict** `===` comparison between the primary key and the key returned from the runner. See [setup-go cache-save.ts](78961f6f84/src/cache-save.ts (L44-L86)) .

|State | Value|
|--- | ---|
|CachePrimaryKey | `setup-go-Linux-x64-ubuntu-22.04-go-1.24.9-abc123` |
|CacheMatchedKey | `setup-go-linux-x64-ubuntu-22.04-go-1.24.9-abc123` |

Because the runner's cache server lowercased the stored key, the response carried `setup-go-linux-...` while the action's primary key was `setup-go-Linux-...`. Strict equality failed, then the actions updated same data again. This repeated on every run, wasting disk and bandwidth. The duplicate blobs accumulate until GC .

https://gitea.com/gitea/runner/actions/runs/462560/jobs/737401#jobstep-2-15
![image.png](/attachments/d3487457-1d09-44b5-9937-a0b8cab1bcc5)

https://gitea.com/gitea/runner/actions/runs/462560/jobs/737401#jobstep-6-22
![image.png](/attachments/9217dc71-cb0c-456b-a516-0017458123c7)

## Fix
Drop the `strings.ToLower` calls in `find` and `reserve` so the original key case is preserved end-to-end. This fix will invalidate existing "case insensitive" keys.

## Notes

The [original act review](https://github.com/nektos/act/pull/1770/changes/BASE..d44b8d15649d9d09d1d891130b8f3962097a81f3#r1177624608) suggested making cache keys case-insensitive because `isExactKeyMatch` compares cache key ignoring case. However, the actions (`setup-go` / `setup-node` / `setup-ruby`) compare with strict `===` rather than `isExactKeyMatch`.

---------

Co-authored-by: Nicolas <bircni@icloud.com>
Reviewed-on: https://gitea.com/gitea/runner/pulls/947
Reviewed-by: silverwind <2021+silverwind@noreply.gitea.com>
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-by: Nicolas <bircni@icloud.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-committed-by: Zettat123 <zettat123@gmail.com>
2026-05-09 12:27:52 +00:00
2026-04-30 20:12:51 +00:00
2023-03-18 01:58:21 -04:00
2026-04-24 13:04:47 +02:00
2026-04-24 13:04:47 +02:00
2022-11-24 15:36:16 +08:00
2026-04-30 20:12:51 +00:00
2026-04-30 20:12:51 +00:00
2023-11-23 20:41:10 +00:00

Gitea Runner

Installation

Prerequisites

Docker Engine Community version is required for docker mode. To install Docker CE, follow the official install instructions.

Download pre-built binary

Visit here and download the right version for your platform.

Build from source

make build

Build a docker image

make docker

Quickstart

Actions are disabled by default, so you need to add the following to the configuration file of your Gitea instance to enable it:

[actions]
ENABLED=true

Register

./gitea-runner register

And you will be asked to input:

  1. Gitea instance URL, like http://192.168.8.8:3000/. You should use your gitea instance ROOT_URL as the instance argument and you should not use localhost or 127.0.0.1 as instance IP;
  2. Runner token, you can get it from http://192.168.8.8:3000/admin/actions/runners;
  3. Runner name, you can just leave it blank;
  4. Runner labels, you can just leave it blank.

The process looks like:

INFO Registering runner, arch=amd64, os=darwin, version=0.1.5.
WARN Runner in user-mode.
INFO Enter the Gitea instance URL (for example, https://gitea.com/):
http://192.168.8.8:3000/
INFO Enter the runner token:
fe884e8027dc292970d4e0303fe82b14xxxxxxxx
INFO Enter the runner name (if set empty, use hostname: Test.local):

INFO Enter the runner labels, leave blank to use the default labels (comma-separated, for example, ubuntu-latest:docker://docker.gitea.com/runner-images:ubuntu-latest):

INFO Registering runner, name=Test.local, instance=http://192.168.8.8:3000/, labels=[ubuntu-latest:docker://docker.gitea.com/runner-images:ubuntu-latest ubuntu-22.04:docker://docker.gitea.com/runner-images:ubuntu-22.04 ubuntu-20.04:docker://docker.gitea.com/runner-images:ubuntu-20.04].
DEBU Successfully pinged the Gitea instance server
INFO Runner registered successfully.

You can also register with command line arguments.

./gitea-runner register --instance http://192.168.8.8:3000 --token <my_runner_token> --no-interactive

If the registry succeed, it will run immediately. Next time, you could run the runner directly.

Run

./gitea-runner daemon

Run with docker

docker run -e GITEA_INSTANCE_URL=https://your_gitea.com -e GITEA_RUNNER_REGISTRATION_TOKEN=<your_token> -v /var/run/docker.sock:/var/run/docker.sock --name my_runner gitea/runner:nightly

Mount a volume on /data if you want the registration file and optional config to survive container recreation (see scripts/run.sh).

Configuration

The runner is configured with a YAML file. Generate a starting point (this matches what ships in the tree):

./gitea-runner generate-config > config.yaml

Pass it with -c / --config on any command that loads configuration (register, daemon, cache-server):

./gitea-runner -c config.yaml register
./gitea-runner -c config.yaml daemon
./gitea-runner -c config.yaml cache-server

Every option is described in config.example.yaml (the same content generate-config prints).

Without a config file

If you omit -c, built-in defaults apply (same as an empty YAML document). A small set of deprecated environment variables can still override parts of that default config, but only when no -c path was given; they are ignored if you use a config file:

Variable Effect
GITEA_DEBUG If true, sets log level to debug
GITEA_TRACE If true, sets log level to trace
GITEA_RUNNER_CAPACITY Concurrent jobs (integer)
GITEA_RUNNER_FILE Registration state file path (default .runner)
GITEA_RUNNER_ENVIRON Extra job env vars as comma-separated KEY:VALUE pairs
GITEA_RUNNER_ENV_FILE Path to an env file merged into job env (same idea as runner.env_file in YAML)

Prefer a YAML file for all settings.

Registration vs config labels

If runner.labels is set in the YAML file, those labels are used during register and the --labels CLI flag is ignored.

External cache (actions/cache)

If cache.external_server is set, you must set cache.external_secret to the same value on this runner and on the standalone cache server. Run the server with gitea-runner cache-server using a config that defines cache.external_secret (and matching cache.dir / host / port as needed). Flags --dir, --host, and --port on cache-server override the file.

Official Docker image

Besides GITEA_INSTANCE_URL and GITEA_RUNNER_REGISTRATION_TOKEN, the image entrypoint supports optional variables such as CONFIG_FILE (passed through as -c), GITEA_RUNNER_LABELS, GITEA_RUNNER_EPHEMERAL, GITEA_RUNNER_ONCE, GITEA_RUNNER_NAME, GITEA_MAX_REG_ATTEMPTS, RUNNER_STATE_FILE, and GITEA_RUNNER_REGISTRATION_TOKEN_FILE. See scripts/run.sh for exact behavior.

For a fuller container-oriented walkthrough, see examples/docker.

When container.bind_workdir is enabled, stale task workspace directories can be cleaned while the runner is idle:

  • directories older than runner.workdir_cleanup_age are removed (default: 24h; set 0 to disable)
  • cleanup runs every runner.idle_cleanup_interval (default: 10m; set 0 to disable)
  • only purely numeric subdirectories under container.workdir_parent are treated as task workspaces and may be removed
  • cleanup assumes container.workdir_parent is not shared across multiple runners

Example Deployments

Check out the examples directory for sample deployment types.

Description
A runner for Gitea based on act.
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