k8s CronJob Intro

k8s CronJob

**every 5 minues start a pod and do one computer **

kubectl run pi --schedule="0/5 * * * ?" --image=perl --restart=OnFailure -- perl -Mbignum=bpi -wle 'print bpi(2000)'

the cron:

--schedule="0/5 * * * *"

定时任务中的时间格式:
* * * * * 五个*号代表的意思分别是分，时，日，月，周

如果想每分钟都执行一次的话就采用默认的 * * * * *，
如果想每五分钟执行一次可以 */5 * * * * ，
如果是每两个小时执行一次的话

那就是 *  */2 * * *来设置;  

cron-jobs

https://kubernetes.io/docs/concepts/workloads/controllers/cron-jobs/

https://kubernetes.io/docs/tasks/job/automated-tasks-with-cron-jobs/

https://kubernetes.io/docs/tasks/administer-cluster/configure-multiple-schedulers/

kubectl run download-kubectl --schedule="*/1 * * * *" --restart=OnFailure --image=busybox -- /bin/sh -c "cd ~;wget https://storage.googleapis.com/kubernetes-release/release/v1.15.0/bin/linux/amd64/kubectl ./"

monitor https://github.com/iovisor/kubectl-trace