mirror of
https://github.com/slurm-personal/school-dev-k8s.git
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Marsel Ibraev
198 lines
3.1 KiB
Markdown
198 lines
3.1 KiB
Markdown
# Job
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### Запускаем простой job
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1) Создаем job
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```bash
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kubectl apply -f job.yaml
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```
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2) Проверяем
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```bash
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kubectl get job
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```
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Видим:
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```bash
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NAME COMPLETIONS DURATION AGE
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hello 1/1 2s 88s
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```
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3) Смотрим на Pod'ы
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```bash
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kubectl get pod
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```
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Видим Pod, созданный Job'ой:
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```bash
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NAME READY STATUS RESTARTS AGE
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hello-6l9tv 0/1 Completed 0 2m6s
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```
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4) Смотрим его логи
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```bash
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kubectl logs hello-6l9tv
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```
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Видим что все отработало правильно:
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```bash
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Mon Mar 18 15:06:10 UTC 2019
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Hello from the Kubernetes cluster
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```
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5) Удаляем Job
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```bash
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kubectl delete job hello
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```
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### Проверяем работу параметра backoffLimit
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6) Открываем файл job.yaml и находим командy выполняющуюся в Pod:
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```yaml
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args:
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- /bin/sh
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- -c
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- date; echo Hello from the Kubernetes cluster
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```
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И ломаем полностью:
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```yaml
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args:
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- /bin/sh
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- -c
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- date; echo Hello from the Kubernetes cluster; exit 1
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```
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7) Создаем Job:
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```bash
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kubectl apply -f job.yaml
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```
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8) Проверяем
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```bash
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kubectl get job
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```
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Видим:
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```bash
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NAME COMPLETIONS DURATION AGE
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hello 0/1 27s 27s
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```
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9) Смотрим на Pod'ы
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```bash
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kubectl get pod
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```
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Видим Pod'ы, созданные Job'ой:
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```bash
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NAME READY STATUS RESTARTS AGE
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hello-5nvqf 0/1 Error 0 22m
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hello-ks4ks 0/1 Error 0 22m
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hello-rl984 0/1 Error 0 22m
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```
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Они в статусе Error
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10) Смотрим в описание Job'ы
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```bash
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kubectl describe job hello
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```
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Видим, что backoffLimit сработал
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```bash
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Warning BackoffLimitExceeded 23m job-controller Job has reached the specified backoff limit
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```
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11) Удаляем Job
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```bash
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kubectl delete job hello
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```
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### Проверяем работу параметра activeDeadlineSeconds
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12) Открываем файл job.yaml и находим командy, выполняющуюся в Pod'е:
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```yaml
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args:
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- /bin/sh
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- -c
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- date; echo Hello from the Kubernetes cluster
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```
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И делаем ее бесконечной
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```yaml
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args:
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- /bin/sh
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- -c
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- while true; do date; echo Hello from the Kubernetes cluster; sleep 1; done
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```
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13) Создаем Job
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```bash
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kubectl apply -f job.yaml
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```
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14) Проверяем
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```bash
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kubectl get job
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```
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Видим:
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```bash
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NAME COMPLETIONS DURATION AGE
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hello 0/1 27s 27s
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```
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15) Смотрим на Pod'ы
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```bash
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kubectl get pod
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```
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Видим Pod'ы, созданный Job'ой
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```bash
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NAME READY STATUS RESTARTS AGE
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hello-bt6g6 1/1 Running 0 5s
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```
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16) Ждем 60 секунд и проверяем Job
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```bash
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kubectl describe job hello
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```
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Видим, что activeDeadlineSeconds сработал
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```bash
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Warning DeadlineExceeded 2m17s job-controller Job was active longer than specified deadline
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```
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17) Удаляем Job
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```bash
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kubectl delete job hello
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```
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