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runnerreplicaset_controller.go
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/
runnerreplicaset_controller.go
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/*
Copyright 2020 The actions-runner-controller authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package controllers
import (
"context"
"fmt"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/record"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/summerwind/actions-runner-controller/api/v1alpha1"
"github.com/summerwind/actions-runner-controller/github"
)
// RunnerReplicaSetReconciler reconciles a Runner object
type RunnerReplicaSetReconciler struct {
client.Client
Log logr.Logger
Recorder record.EventRecorder
Scheme *runtime.Scheme
GitHubClient *github.Client
}
// +kubebuilder:rbac:groups=actions.summerwind.dev,resources=runnerreplicasets,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=actions.summerwind.dev,resources=runnerreplicasets/finalizers,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=actions.summerwind.dev,resources=runnerreplicasets/status,verbs=get;update;patch
// +kubebuilder:rbac:groups=actions.summerwind.dev,resources=runners,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=actions.summerwind.dev,resources=runners/status,verbs=get;update;patch
// +kubebuilder:rbac:groups=core,resources=events,verbs=create;patch
func (r *RunnerReplicaSetReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
ctx := context.Background()
log := r.Log.WithValues("runner", req.NamespacedName)
var rs v1alpha1.RunnerReplicaSet
if err := r.Get(ctx, req.NamespacedName, &rs); err != nil {
return ctrl.Result{}, client.IgnoreNotFound(err)
}
if !rs.ObjectMeta.DeletionTimestamp.IsZero() {
return ctrl.Result{}, nil
}
var allRunners v1alpha1.RunnerList
if err := r.List(ctx, &allRunners, client.InNamespace(req.Namespace)); err != nil {
if !errors.IsNotFound(err) {
return ctrl.Result{}, err
}
}
var myRunners []v1alpha1.Runner
var available, ready int
for _, r := range allRunners.Items {
if metav1.IsControlledBy(&r, &rs) {
myRunners = append(myRunners, r)
available += 1
if r.Status.Phase == string(corev1.PodRunning) {
ready += 1
}
}
}
var desired int
if rs.Spec.Replicas != nil {
desired = *rs.Spec.Replicas
} else {
desired = 1
}
log.V(0).Info("debug", "desired", desired, "available", available)
if available > desired {
n := available - desired
// get runners that are currently not busy
var notBusy []v1alpha1.Runner
for _, runner := range myRunners {
busy, err := r.isRunnerBusy(ctx, runner.Spec.Organization, runner.Spec.Repository, runner.Name)
if err != nil {
log.Error(err, "Failed to check if runner is busy")
return ctrl.Result{}, err
}
if !busy {
notBusy = append(notBusy, runner)
}
}
if len(notBusy) < n {
n = len(notBusy)
}
for i := 0; i < n; i++ {
if err := r.Client.Delete(ctx, ¬Busy[i]); err != nil {
log.Error(err, "Failed to delete runner resource")
return ctrl.Result{}, err
}
r.Recorder.Event(&rs, corev1.EventTypeNormal, "RunnerDeleted", fmt.Sprintf("Deleted runner '%s'", myRunners[i].Name))
log.Info("Deleted runner", "runnerreplicaset", rs.ObjectMeta.Name)
}
} else if desired > available {
n := desired - available
for i := 0; i < n; i++ {
newRunner, err := r.newRunner(rs)
if err != nil {
log.Error(err, "Could not create runner")
return ctrl.Result{}, err
}
if err := r.Client.Create(ctx, &newRunner); err != nil {
log.Error(err, "Failed to create runner resource")
return ctrl.Result{}, err
}
}
}
if rs.Status.AvailableReplicas != available || rs.Status.ReadyReplicas != ready {
updated := rs.DeepCopy()
updated.Status.AvailableReplicas = available
updated.Status.ReadyReplicas = ready
if err := r.Status().Update(ctx, updated); err != nil {
log.Error(err, "Failed to update runner status")
return ctrl.Result{}, err
}
}
return ctrl.Result{}, nil
}
func (r *RunnerReplicaSetReconciler) newRunner(rs v1alpha1.RunnerReplicaSet) (v1alpha1.Runner, error) {
objectMeta := rs.Spec.Template.ObjectMeta.DeepCopy()
objectMeta.GenerateName = rs.ObjectMeta.Name + "-"
objectMeta.Namespace = rs.ObjectMeta.Namespace
runner := v1alpha1.Runner{
TypeMeta: metav1.TypeMeta{},
ObjectMeta: *objectMeta,
Spec: rs.Spec.Template.Spec,
}
if err := ctrl.SetControllerReference(&rs, &runner, r.Scheme); err != nil {
return runner, err
}
return runner, nil
}
func (r *RunnerReplicaSetReconciler) SetupWithManager(mgr ctrl.Manager) error {
r.Recorder = mgr.GetEventRecorderFor("runnerreplicaset-controller")
return ctrl.NewControllerManagedBy(mgr).
For(&v1alpha1.RunnerReplicaSet{}).
Owns(&v1alpha1.Runner{}).
Complete(r)
}
func (r *RunnerReplicaSetReconciler) isRunnerBusy(ctx context.Context, org, repo, name string) (bool, error) {
runners, err := r.GitHubClient.ListRunners(ctx, org, repo)
r.Log.Info("runners", "github", runners)
if err != nil {
return false, err
}
for _, runner := range runners {
if runner.GetName() == name {
return runner.GetBusy(), nil
}
}
return false, fmt.Errorf("runner not found")
}