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main.go
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main.go
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package main
import (
"flag"
"fmt"
"context"
"strings"
"log"
kubernetes "k8s.io/client-go/kubernetes"
cruntimeconfig "sigs.k8s.io/controller-runtime/pkg/client/config"
batchv1 "k8s.io/api/batch/v1"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
func main() {
jobName := flag.String("jobname", "test-job", "The name of the job")
containerImage := flag.String("image", "ubuntu:latest", "Name of the container image")
entryCommand := flag.String("command", "ls", "The command to run inside the container")
flag.Parse()
fmt.Printf("Args : %s %s %s\n", *jobName, *containerImage, *entryCommand)
clientset := connectK8sCluster()
launchK8sCronJob(clientset, jobName, containerImage, entryCommand)
}
func connectK8sCluster() *kubernetes.Clientset {
return kubernetes.NewForConfigOrDie(cruntimeconfig.GetConfigOrDie())
}
func launchK8sCronJob(clientset *kubernetes.Clientset, jobName *string, image *string, cmd *string) {
jobs := clientset.BatchV1().Jobs("default")
var backOffLimit int32 = 0
jobSpec := &batchv1.Job{
ObjectMeta: metav1.ObjectMeta{
Name: *jobName,
Namespace: "default",
},
Spec: batchv1.JobSpec{
Template: v1.PodTemplateSpec{
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: *jobName,
Image: *image,
Command: strings.Split(*cmd, " "),
},
},
RestartPolicy: v1.RestartPolicyNever,
},
},
BackoffLimit: &backOffLimit,
},
}
_, err := jobs.Create(context.TODO(), jobSpec, metav1.CreateOptions{})
if err != nil {
log.Fatalln("failed to create k8s job")
}
log.Println("successfully created k8s job")
}