Getting the Jobs Done With

Kubernetes / OpenShift

Maciej Szulik, KubeCon 2016

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soltysh @

maszulik@redhat.com

https://github.com/soltysh/talks/

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Job

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Job apiVersion: batch/v1kind: Jobmetadata: name: hellospec: template: metadata: name: hello spec: containers: - name: hello image: python:3.5.1 command: ["python", "-c", "print('Hello world!')"] restartPolicy: Never

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Job

- api

-> apiVersion: batch/v1

kind: Jobmetadata: name: jobspec: template: metadata: name: job spec: containers: - name: job image: python:3.5.1 command: ["python", "-c", "print('Hello world!')"] restartPolicy: Never

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Job

- api

- command

apiVersion: batch/v1kind: Jobmetadata: name: jobspec: template: metadata: name: job spec: containers:

-> - name: job image: python:3.5.1 command: ["python", "-c", "print('Hello world!')"]

restartPolicy: Never

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Job

- api

- command

- restart policy

apiVersion: batch/v1kind: Jobmetadata: name: jobspec: template: metadata: name: job spec: containers: - name: job image: python:3.5.1 command: ["python", "-c", "print('Hello world!')"]

-> restartPolicy: Never

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Job

- api

- command

- restart policy

Always

OnFailure

Never

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Job

- api

- command

- restart policy

Always

OnFailure

Never

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Job

- api

- command

- restart policy

- pod selector?

apiVersion: batch/v1kind: Jobmetadata: name: jobspec: template: metadata: name: job spec: containers: - name: job image: python:3.5.1 command: ["python", "-c", "print('Hello world!')"] restartPolicy: Never

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Job

- api

- command

- restart policy

- pod selector?

- parallelism /completions

single jobs.spec.completions: 1.spec.parallelism: 1

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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

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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

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Use Cases- data calculations

- image rendering

etc.

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Rendering

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Render demo

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Future workflow by @sdminonne

indexed jobs by @erictune

scheduled jobs by @soltysh

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http://commons.openshift.org/join

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Links

soltysh @

maszulik@redhat.com

http://releases.k8s.io/master/docs/proposals/job.md

http://releases.k8s.io/master/docs/user-guide/jobs.md

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