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.

1. Getting the Jobs Done With
Kubernetes / OpenShift
Maciej Szulik, KubeCon 2016
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2. soltysh @    
maszulik@redhat.com
https://github.com/soltysh/talks/
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3. 3 / 20

4. Job
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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
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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
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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
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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
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9. Job
- api
- command
- restart policy
Always
OnFailure
Never
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10. Job
- api
- command
- restart policy
Always
OnFailure
Never
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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
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12. Job
- api
- command
- restart policy
- pod selector?
- parallelism /
completions
single jobs
.spec.completions: 1
.spec.parallelism: 1
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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
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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
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15. Use Cases
- data calculations
- image rendering
etc.
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16. Rendering
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17. Render demo
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18. Future
workflow by @sdminonne
indexed jobs by @erictune
scheduled jobs by @soltysh
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19. http://commons.openshift.org/join
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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
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