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enhance: add runner.default_image for jobs matching no label (#1164)

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A job whose `runs-on` matches none of the runner's labels, which includes every job that sets no `runs-on` at all, runs in `runner.default_image`. It defaults to `docker.gitea.com/runner-images:ubuntu-latest` as before, so a mirror can be pointed at instead.

A runner with no reachable docker daemon now runs such a job on the host, rather than failing on an image it cannot pull. Runners that use docker are unaffected and never probe for one.

This matters most to a host-mode runner, one whose labels are all `host`. Such a runner has no daemon to pull an image with, so a job matching none of its labels used to fail at container start. It now runs on the host, where that runner runs everything else anyway, and it takes no configuration to get there. A host-mode runner that does have a daemon within reach keeps using the image, unchanged.

Supersedes https://gitea.com/gitea/runner/pulls/642

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Co-authored-by: silverwind <me@silverwind.io>
Reviewed-on: https://gitea.com/gitea/runner/pulls/1164
Reviewed-by: silverwind <2021+silverwind@noreply.gitea.com>
This commit is contained in:
bircni
2026-08-19 18:36:00 +00:00
parent bc8161c673
commit 11ac12efa4
9 changed files with 86 additions and 22 deletions
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internal/app/cmd/exec.go
+1 -1
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@@ -558,7 +558,7 @@ func loadExecCmd(ctx context.Context) *cobra.Command {
execCmd.PersistentFlags().BoolVarP(&execArg.noSkipCheckout, "no-skip-checkout", "", false, "Do not skip actions/checkout")
execCmd.PersistentFlags().BoolVarP(&execArg.debug, "debug", "d", false, "enable debug log")
execCmd.PersistentFlags().BoolVarP(&execArg.dryrun, "dryrun", "n", false, "dryrun mode")
execCmd.PersistentFlags().StringVarP(&execArg.image, "image", "i", "docker.gitea.com/runner-images:ubuntu-latest", "Docker image to use. Use \"-self-hosted\" to run directly on the host.")
execCmd.PersistentFlags().StringVarP(&execArg.image, "image", "i", config.DefaultImage, "Docker image to use. Use \"-self-hosted\" to run directly on the host.")
execCmd.PersistentFlags().StringVarP(&execArg.toolCacheMode, "tool-cache-mode", "", config.ToolCacheModeNone, "What to mount at RUNNER_TOOL_CACHE: none, or shared to reuse one tool cache across runs")
execCmd.PersistentFlags().StringVarP(&execArg.network, "network", "", "", "Specify the network to which the container will connect")
execCmd.PersistentFlags().StringVarP(&execArg.githubInstance, "gitea-instance", "", "", "Gitea instance to use.")