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feat: add Kubernetes backend (#1260)

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Adds a Kubernetes backend. A `name:kubernetes://image` label runs the job as one pod through the Kubernetes API, with services as containers of the same pod. Step env is exported by a script sent over exec stdin, keeping it out of the pod spec and process arguments, and service env goes into a per-job Secret. Docker actions and container options are rejected. See `docs/kubernetes.md`.

Operators shape job pods with `kubernetes.pod_template`, with per-label `pod_templates` merged in `runs-on` order and a `$services` entry for service containers. The idle cleanup removes pods and Secrets a runner left behind.

The client calls the Kubernetes API directly and runs step commands over `coder/websocket` (same dependency used in gitea) instead of pulling in the heavyweight `kubernetes/client-go`. Includes an e2e test against k3s.

Replaces: https://gitea.com/gitea/runner/pulls/1000
Fixes: https://gitea.com/gitea/runner/issues/31

Assisted-by: Claude Code:claude-opus-5-5
Co-authored-by: Zettat123 <[email protected]>
Co-authored-by: bircni <[email protected]>
Reviewed-on: https://gitea.com/gitea/runner/pulls/1260
Reviewed-by: Lunny Xiao <[email protected]>
Reviewed-by: Zettat123 <[email protected]>
Co-authored-by: silverwind <[email protected]>
This commit is contained in:
silverwindZettat123bircni
 authored and Lunny Xiao committed 2026-10-01 06:59:15 +00:00
1 parent 07ca4bfa7f
commit 0cedd98051
35 files changed
+2012 -226
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e2e/gitea_fixture.go
+17 -5
View File
@@ -23,6 +23,7 @@ import (
"gitea.com/gitea/runner/act/container"
"github.com/moby/moby/api/pkg/stdcopy"
apicontainer "github.com/moby/moby/api/types/container"
"github.com/moby/moby/api/types/network"
mobyclient "github.com/moby/moby/client"
@@ -306,9 +307,14 @@ func randomToken(n int) string {
}
func (f *GiteaFixture) exec(ctx context.Context, cmd []string) (string, error) {
created, err := f.cli.ExecCreate(ctx, f.id, mobyclient.ExecCreateOptions{
return containerExec(ctx, f.cli, f.id, "git", nil, cmd...) // gitea refuses root
}
func containerExec(ctx context.Context, cli mobyclient.APIClient, id, user string, stdin io.Reader, cmd ...string) (string, error) {
created, err := cli.ExecCreate(ctx, id, mobyclient.ExecCreateOptions{
Cmd: cmd,
User: "git", // gitea refuses root
User: user,
AttachStdin: stdin != nil,
AttachStdout: true,
AttachStderr: true,
})
@@ -316,18 +322,24 @@ func (f *GiteaFixture) exec(ctx context.Context, cmd []string) (string, error) {
return "", err
}
attached, err := f.cli.ExecAttach(ctx, created.ID, mobyclient.ExecAttachOptions{})
attached, err := cli.ExecAttach(ctx, created.ID, mobyclient.ExecAttachOptions{})
if err != nil {
return "", err
}
defer attached.Close()
if stdin != nil {
go func() {
_, _ = io.Copy(attached.Conn, stdin)
_ = attached.CloseWrite()
}()
}
var out bytes.Buffer
if _, err := io.Copy(&out, attached.Reader); err != nil {
if _, err := stdcopy.StdCopy(&out, &out, attached.Reader); err != nil {
return "", err
}
inspected, err := f.cli.ExecInspect(ctx, created.ID, mobyclient.ExecInspectOptions{})
inspected, err := cli.ExecInspect(ctx, created.ID, mobyclient.ExecInspectOptions{})
if err != nil {
return "", err
}