James Munnelly
151 lines
3.5 KiB
Go
151 lines
3.5 KiB
Go
package kubernetes
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import (
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"fmt"
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"time"
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log "github.com/Sirupsen/logrus"
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"k8s.io/kubernetes/pkg/api"
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stableApi "k8s.io/kubernetes/pkg/api/unversioned"
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"k8s.io/kubernetes/pkg/client/restclient"
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client "k8s.io/kubernetes/pkg/client/unversioned"
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"github.com/munnerz/plex-elastic-transcoder/common"
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"github.com/munnerz/plex-elastic-transcoder/executors"
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)
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type KubernetesExecutor struct {
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executors.AbstractExecutor
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pod *api.Pod
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client *client.Client
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}
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func (e *KubernetesExecutor) createPod() *api.Pod {
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return &api.Pod{
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TypeMeta: stableApi.TypeMeta{
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Kind: "Pod",
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},
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ObjectMeta: api.ObjectMeta{
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GenerateName: fmt.Sprintf("%s-", e.Config.Kubernetes.PodBasename),
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Namespace: e.Config.Kubernetes.Namespace,
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},
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Spec: api.PodSpec{
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Volumes: []api.Volume{
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api.Volume{
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Name: "source-dir",
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VolumeSource: e.Config.Kubernetes.MediaVolumeSource,
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},
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api.Volume{
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Name: "transcode-dir",
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VolumeSource: e.Config.Kubernetes.TranscodeVolumeSource,
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},
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},
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RestartPolicy: api.RestartPolicyNever,
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Containers: []api.Container{
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api.Container{
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Name: "plex-new-transcoder",
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Image: e.Config.Kubernetes.Image,
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Args: e.Job.Args,
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VolumeMounts: []api.VolumeMount{
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api.VolumeMount{
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Name: "source-dir",
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MountPath: e.Config.Plex.MediaDir,
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},
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api.VolumeMount{
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Name: "transcode-dir",
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MountPath: e.Config.Plex.TranscodeDir,
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},
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},
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ImagePullPolicy: api.PullAlways,
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},
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},
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},
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}
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}
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func (e *KubernetesExecutor) Start() error {
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log.Debugf("executing job: %s", e.Job)
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if len(e.Config.Kubernetes.ProxyURL) > 0 {
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e.client = client.NewOrDie(&restclient.Config{
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Host: e.Config.Kubernetes.ProxyURL,
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})
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} else {
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var err error
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e.client, err = client.NewInCluster()
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if err != nil {
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return fmt.Errorf("failed to create kubernetes client: %s", err.Error())
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}
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}
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pod := e.createPod()
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var err error
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e.pod, err = e.client.Pods(pod.ObjectMeta.Namespace).Create(pod)
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if err != nil {
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return err
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}
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log.Debugf("successfully scheduled job on cluster with name: %s", e.pod.ObjectMeta.Name)
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return nil
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}
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func (e *KubernetesExecutor) Stop() error {
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return e.client.Pods(e.pod.ObjectMeta.Namespace).Delete(e.pod.ObjectMeta.Name, nil)
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}
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func podPhaseToExecutorPhase(in api.PodPhase) common.ExecutorPhase {
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switch in {
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case api.PodRunning:
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return common.ExecutorPhaseRunning
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case api.PodPending:
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return common.ExecutorPhasePreparing
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case api.PodSucceeded:
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return common.ExecutorPhaseSucceeded
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case api.PodFailed:
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return common.ExecutorPhaseFailed
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default:
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return common.ExecutorPhaseUnknown
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}
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}
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func (e *KubernetesExecutor) WaitForState(targetState common.ExecutorPhase) error {
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Loop:
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for {
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pod, err := e.client.Pods(e.pod.ObjectMeta.Namespace).Get(e.pod.ObjectMeta.Name)
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if err != nil {
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return err
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}
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log.Debugf("pod state: %s", pod.Status.Phase)
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Switch:
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switch podPhaseToExecutorPhase(pod.Status.Phase) {
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case targetState:
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break Loop
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case common.ExecutorPhaseFailed:
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return fmt.Errorf("pod failed whilst waiting for state '%s': %s", targetState, pod.Status.Reason)
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default:
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break Switch
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}
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time.Sleep(1 * time.Second)
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}
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return nil
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}
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func init() {
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common.RegisterExecutor("kubernetes", common.ExecutorFactory{
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Create: func(config common.Config, job common.Job) common.Executor {
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return &KubernetesExecutor{
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AbstractExecutor: executors.AbstractExecutor{
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Config: config,
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Job: job,
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},
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}
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},
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})
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}
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