KubeCon EU 2016: Getting the Jobs Done With Kubernetes
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The document presents an overview of Kubernetes job management as discussed by Maciej Szulik at KubeCon 2016. It emphasizes the usage of the batch job API in Kubernetes, detailing specifications for single and parallel jobs along with example commands using Python. It also covers potential use cases such as data calculations and image rendering, and indicates future workflows and links for further resources.
![Job apiVersion: batch/v1
kind: Job
metadata:
name: hello
spec:
template:
metadata:
name: hello
spec:
containers:
- name: hello
image: python:3.5.1
command: ["python", "-c",
"print('Hello world!')"]
restartPolicy: Never
5 / 20](https://image.slidesharecdn.com/gettingthejobsdonewithkubernetesopenshift-160329021014/85/KubeCon-EU-2016-Getting-the-Jobs-Done-With-Kubernetes-5-320.jpg)
![Job
- api
->apiVersion:batch/v1
kind: Job
metadata:
name: job
spec:
template:
metadata:
name: job
spec:
containers:
- name: job
image: python:3.5.1
command: ["python", "-c",
"print('Hello world!')"]
restartPolicy: Never
6 / 20](https://image.slidesharecdn.com/gettingthejobsdonewithkubernetesopenshift-160329021014/85/KubeCon-EU-2016-Getting-the-Jobs-Done-With-Kubernetes-6-320.jpg)
![Job
- api
- command
apiVersion: batch/v1
kind: Job
metadata:
name: job
spec:
template:
metadata:
name: job
spec:
containers:
-> -name:job
image:python:3.5.1
command:["python","-c",
"print('Helloworld!')"]
restartPolicy: Never
7 / 20](https://image.slidesharecdn.com/gettingthejobsdonewithkubernetesopenshift-160329021014/85/KubeCon-EU-2016-Getting-the-Jobs-Done-With-Kubernetes-7-320.jpg)
![Job
- api
- command
- restart policy
apiVersion: batch/v1
kind: Job
metadata:
name: job
spec:
template:
metadata:
name: job
spec:
containers:
- name: job
image: python:3.5.1
command: ["python", "-c",
"print('Hello world!')"]
-> restartPolicy:Never
8 / 20](https://image.slidesharecdn.com/gettingthejobsdonewithkubernetesopenshift-160329021014/85/KubeCon-EU-2016-Getting-the-Jobs-Done-With-Kubernetes-8-320.jpg)
![Job
- api
- command
- restart policy
- pod selector?
apiVersion: batch/v1
kind: Job
metadata:
name: job
spec:
template:
metadata:
name: job
spec:
containers:
- name: job
image: python:3.5.1
command: ["python", "-c",
"print('Hello world!')"]
restartPolicy: Never
11 / 20](https://image.slidesharecdn.com/gettingthejobsdonewithkubernetesopenshift-160329021014/85/KubeCon-EU-2016-Getting-the-Jobs-Done-With-Kubernetes-11-320.jpg)
KubeCon EU 2016: Getting the Jobs Done With Kubernetes
- 1. Getting the Jobs Done With Kubernetes / OpenShift Maciej Szulik, KubeCon 2016 1 / 20
- 2. soltysh @ maszulik@redhat.com https://github.com/soltysh/talks/ 2 / 20
- 3. 3 / 20
- 4. Job 4 / 20
- 5. Job apiVersion: batch/v1 kind: Job metadata: name: hello spec: template: metadata: name: hello spec: containers: - name: hello image: python:3.5.1 command: ["python", "-c", "print('Hello world!')"] restartPolicy: Never 5 / 20
- 6. Job - api ->apiVersion:batch/v1 kind: Job metadata: name: job spec: template: metadata: name: job spec: containers: - name: job image: python:3.5.1 command: ["python", "-c", "print('Hello world!')"] restartPolicy: Never 6 / 20
- 7. Job - api - command apiVersion: batch/v1 kind: Job metadata: name: job spec: template: metadata: name: job spec: containers: -> -name:job image:python:3.5.1 command:["python","-c", "print('Helloworld!')"] restartPolicy: Never 7 / 20
- 8. Job - api - command - restart policy apiVersion: batch/v1 kind: Job metadata: name: job spec: template: metadata: name: job spec: containers: - name: job image: python:3.5.1 command: ["python", "-c", "print('Hello world!')"] -> restartPolicy:Never 8 / 20
- 9. Job - api - command - restart policy Always OnFailure Never 9 / 20
- 10. Job - api - command - restart policy Always OnFailure Never 10 / 20
- 11. Job - api - command - restart policy - pod selector? apiVersion: batch/v1 kind: Job metadata: name: job spec: template: metadata: name: job spec: containers: - name: job image: python:3.5.1 command: ["python", "-c", "print('Hello world!')"] restartPolicy: Never 11 / 20
- 12. Job - api - command - restart policy - pod selector? - parallelism / completions single jobs .spec.completions: 1 .spec.parallelism: 1 12 / 20
- 13. Job - api - command - restart policy - pod selector? - parallelism / completions single jobs .spec.completions: 1 .spec.parallelism: 1 parallel job with a fixed completions count .spec.completions: 8 .spec.parallelism: 4 13 / 20
- 14. Job - api - command - restart policy - pod selector? - parallelism / completions single jobs .spec.completions: 1 .spec.parallelism: 1 parallel job with a fixed completions count .spec.completions: 8 .spec.parallelism: 4 parallel job with a work queue .spec.completions: <unset> .spec.parallelism: 4 14 / 20
- 15. Use Cases - data calculations - image rendering etc. 15 / 20
- 17. Render demo 17 / 20
- 18. Future workflow by @sdminonne indexed jobs by @erictune scheduled jobs by @soltysh 18 / 20
- 20. Links soltysh @ maszulik@redhat.com http://releases.k8s.io/master/docs/proposals/job.md http://releases.k8s.io/master/docs/user-guide/jobs.md 20 / 20