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Agent-wide node selector (#3608)

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Co-authored-by: qwerty287 <80460567+qwerty287@users.noreply.github.com>
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Thomas Anderson 2024-06-03 18:25:28 +03:00 committed by GitHub
parent c53a05b6fb
commit 065eebd306
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5 changed files with 33 additions and 4 deletions
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9
docs/docs/30-administration/22-backends/40-kubernetes.md
View file

@ -79,7 +79,8 @@ And then overwrite the `nodeSelector` in the `backend_options` section of the st
kubernetes.io/arch: "${ARCH}"
```
You can use [PodNodeSelector](https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/#podnodeselector) admission controller if you want to set the node selector by per-namespace basis.
You can use [WOODPECKER_BACKEND_K8S_POD_NODE_SELECTOR](#woodpecker_backend_k8s_pod_node_selector) if you want to set the node selector per Agent
or [PodNodeSelector](https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/#podnodeselector) admission controller if you want to set the node selector by per-namespace basis.
### Tolerations
@ -279,6 +280,12 @@ Additional annotations to apply to worker Pods. Must be a YAML object, e.g. `{"e
Determines if Pod annotations can be defined from a step's backend options.
### `WOODPECKER_BACKEND_K8S_POD_NODE_SELECTOR`
> Default: empty
Additional node selector to apply to worker pods. Must be a YAML object, e.g. `{"topology.kubernetes.io/region":"eu-central-1"}`.
### `WOODPECKER_BACKEND_K8S_SECCTX_NONROOT`
> Default: `false`

6
pipeline/backend/kubernetes/flags.go
View file

@ -61,6 +61,12 @@ var Flags = []cli.Flag{
Usage: "backend k8s additional Agent-wide worker pod annotations",
Value: "",
},
&cli.StringFlag{
EnvVars: []string{"WOODPECKER_BACKEND_K8S_POD_NODE_SELECTOR"},
Name: "backend-k8s-pod-node-selector",
Usage: "backend k8s Agent-wide worker pod node selector",
Value: "",
},
&cli.BoolFlag{
EnvVars: []string{"WOODPECKER_BACKEND_K8S_POD_ANNOTATIONS_ALLOW_FROM_STEP"},
Name: "backend-k8s-pod-annotations-allow-from-step",

9
pipeline/backend/kubernetes/kubernetes.go
View file

@ -62,6 +62,7 @@ type config struct {
PodLabelsAllowFromStep bool
PodAnnotations map[string]string
PodAnnotationsAllowFromStep bool
PodNodeSelector map[string]string
ImagePullSecretNames []string
SecurityContext SecurityContextConfig
}
@ -91,6 +92,7 @@ func configFromCliContext(ctx context.Context) (*config, error) {
PodLabelsAllowFromStep: c.Bool("backend-k8s-pod-labels-allow-from-step"),
PodAnnotations: make(map[string]string), // just init empty map to prevent nil panic
PodAnnotationsAllowFromStep: c.Bool("backend-k8s-pod-annotations-allow-from-step"),
PodNodeSelector: make(map[string]string), // just init empty map to prevent nil panic
ImagePullSecretNames: c.StringSlice("backend-k8s-pod-image-pull-secret-names"),
SecurityContext: SecurityContextConfig{
RunAsNonRoot: c.Bool("backend-k8s-secctx-nonroot"), // cspell:words secctx nonroot
@ -113,6 +115,12 @@ func configFromCliContext(ctx context.Context) (*config, error) {
return nil, err
}
}
if nodeSelector := c.String("backend-k8s-pod-node-selector"); nodeSelector != "" {
if err := yaml.Unmarshal([]byte(nodeSelector), &config.PodNodeSelector); err != nil {
log.Error().Err(err).Msgf("could not unmarshal pod node selector '%s'", nodeSelector)
return nil, err
}
}
return &config, nil
}
}
@ -173,6 +181,7 @@ func (e *kube) getConfig() *config {
c := *e.config
c.PodLabels = maps.Clone(e.config.PodLabels)
c.PodAnnotations = maps.Clone(e.config.PodAnnotations)
c.PodNodeSelector = maps.Clone(e.config.PodNodeSelector)
c.ImagePullSecretNames = slices.Clone(e.config.ImagePullSecretNames)
return &c
}

9
pipeline/backend/kubernetes/pod.go
View file

@ -154,7 +154,7 @@ func podSpec(step *types.Step, config *config, options BackendOptions) (v1.PodSp
ServiceAccountName: options.ServiceAccountName,
ImagePullSecrets: imagePullSecretsReferences(config.ImagePullSecretNames),
HostAliases: hostAliases(step.ExtraHosts),
NodeSelector: nodeSelector(options.NodeSelector, step.Environment["CI_SYSTEM_PLATFORM"]),
NodeSelector: nodeSelector(options.NodeSelector, config.PodNodeSelector, step.Environment["CI_SYSTEM_PLATFORM"]),
Tolerations: tolerations(options.Tolerations),
SecurityContext: podSecurityContext(options.SecurityContext, config.SecurityContext, step.Privileged),
}
@ -331,7 +331,7 @@ func resourceList(resources map[string]string) (v1.ResourceList, error) {
return requestResources, nil
}
func nodeSelector(backendNodeSelector map[string]string, platform string) map[string]string {
func nodeSelector(backendNodeSelector, configNodeSelector map[string]string, platform string) map[string]string {
nodeSelector := make(map[string]string)
if platform != "" {
@ -340,6 +340,11 @@ func nodeSelector(backendNodeSelector map[string]string, platform string) map[st
log.Trace().Msgf("using the node selector from the Agent's platform: %v", nodeSelector)
}
if len(configNodeSelector) > 0 {
log.Trace().Msgf("appending labels to the node selector from the configuration: %v", configNodeSelector)
maps.Copy(nodeSelector, configNodeSelector)
}
if len(backendNodeSelector) > 0 {
log.Trace().Msgf("appending labels to the node selector from the backend options: %v", backendNodeSelector)
maps.Copy(nodeSelector, backendNodeSelector)

4
pipeline/backend/kubernetes/pod_test.go
View file

@ -240,7 +240,8 @@ func TestFullPod(t *testing.T) {
],
"restartPolicy": "Never",
"nodeSelector": {
"storage": "ssd"
"storage": "ssd",
"topology.kubernetes.io/region": "eu-central-1"
},
"runtimeClassName": "runc",
"serviceAccountName": "wp-svc-acc",
@ -331,6 +332,7 @@ func TestFullPod(t *testing.T) {
PodLabelsAllowFromStep: true,
PodAnnotations: map[string]string{"apps.kubernetes.io/pod-index": "0"},
PodAnnotationsAllowFromStep: true,
PodNodeSelector: map[string]string{"topology.kubernetes.io/region": "eu-central-1"},
SecurityContext: SecurityContextConfig{RunAsNonRoot: false},
}, "wp-01he8bebctabr3kgk0qj36d2me-0", "linux/amd64", BackendOptions{
Labels: map[string]string{"part-of": "woodpecker-ci"},