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0cedd98051
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]>
115 lines
2.5 KiB
Go
115 lines
2.5 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package labels
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import (
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"errors"
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"strings"
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)
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const (
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SchemeHost = "host"
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SchemeDocker = "docker"
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SchemeKubernetes = "kubernetes"
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// SelfHostedPlatform is the platform marker act treats as "run on the host".
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SelfHostedPlatform = "-self-hosted"
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)
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type Label struct {
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Name string
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Schema string
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Arg string
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// Opaque marks a label whose name contains a colon but no supported schema,
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// like "pool:e57e18d4-...". It is kept verbatim and behaves like a host label.
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Opaque bool
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}
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func Parse(str string) (*Label, error) {
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if str == "" {
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return nil, errors.New("empty label")
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}
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splits := strings.SplitN(str, ":", 3)
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label := &Label{
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Name: splits[0],
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Schema: SchemeHost,
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Arg: "",
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}
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if len(splits) >= 2 {
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label.Schema = splits[1]
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}
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if len(splits) >= 3 {
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label.Arg = splits[2]
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}
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kubernetes := label.Schema == SchemeKubernetes && strings.HasPrefix(label.Arg, "//") && len(label.Arg) > 2
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if label.Schema != SchemeHost && label.Schema != SchemeDocker && !kubernetes {
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// Not a schema we know, or kubernetes without an image: the colon belongs to the label name itself.
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return &Label{
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Name: str,
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Schema: SchemeHost,
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Opaque: true,
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}, nil
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}
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return label, nil
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}
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type Labels []*Label
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func (l Labels) RequireDocker() bool {
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for _, label := range l {
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if label.Schema == SchemeDocker {
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return true
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}
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}
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return false
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}
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// PickPlatform returns the platform of the first runs-on entry this runner has a label for, or "".
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func (l Labels) PickPlatform(runsOn []string) string {
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platforms := make(map[string]string, len(l))
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for _, label := range l {
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switch label.Schema {
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case SchemeDocker:
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// "//" will be ignored
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platforms[label.Name] = strings.TrimPrefix(label.Arg, "//")
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case SchemeKubernetes:
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platforms[label.Name] = SchemeKubernetes + ":" + label.Arg
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case SchemeHost:
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platforms[label.Name] = SelfHostedPlatform
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default:
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continue
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}
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}
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for _, v := range runsOn {
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if v, ok := platforms[v]; ok {
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return v
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}
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}
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return ""
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}
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func (l Labels) Names() []string {
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names := make([]string, 0, len(l))
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for _, label := range l {
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names = append(names, label.Name)
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}
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return names
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}
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func (l Labels) ToStrings() []string {
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ls := make([]string, 0, len(l))
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for _, label := range l {
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lbl := label.Name
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if !label.Opaque && label.Schema != "" {
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lbl += ":" + label.Schema
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if label.Arg != "" {
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lbl += ":" + label.Arg
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}
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}
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ls = append(ls, lbl)
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}
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return ls
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}
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