OpenShift Cheatsheet - Revision history

Sunflower: /* pvc */

2026-04-27T14:30:05Z

pvc

← Older revision		Revision as of 14:30, 27 April 2026
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	=== pvc ===		=== pvc ===
	$ oc set volume deployment/<mydeployment> --add --type pvc --name <mypvc-vol> --claim-name <mypvc> --mount-path < /var/lib/mysql> (--claim-class <storage class> --claim-mode ~~RWX~~\|~~RWO~~ --claim-size 1G )		$ oc set volume deployment/<mydeployment> --add --type pvc --name <mypvc-vol> --claim-name <mypvc> --mount-path < /var/lib/mysql> (--claim-class <storage class> --claim-mode rwm\|rwo --claim-size 1G )

	== Remove volume from deployment ==		== Remove volume from deployment ==

2026-03-10T13:51:04Z

← Older revision		Revision as of 13:51, 10 March 2026
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	Which resources are there?		Which resources are there?
	$ oc api-resources (--namespaced=false)(--api-group=config.openshift.io)(~~00api~~-group='')		$ oc api-resources (--namespaced=false)(--api-group=config.openshift.io)(--api-group='')
	(in\|without namespace)(openshift specific)(core-api-group only)		(in\|without namespace)(openshift specific) (core-api-group only)

	Explain resources:		Explain resources:

2026-02-16T17:12:39Z

Deployments

← Older revision		Revision as of 17:12, 16 February 2026
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	oc set env deployment/mariadb --from=secret/my-secret (--prefix=MYSQL_)		oc set env deployment/mariadb --from=secret/my-secret (--prefix=MYSQL_)

	=== Restart deployment after change ===		== Restart deployment after change ==

	$ oc rollout restart deployment testdeploy		$ oc rollout restart deployment testdeploy

2026-02-14T09:20:06Z

2026-02-06T21:17:54Z

Set environment variables afterwards

← Older revision		Revision as of 21:17, 6 February 2026
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	(Not recommended for passwords; you'd better set secrets and configmaps, s. below)		(Not recommended for passwords; you'd better set secrets and configmaps, s. below)

	oc set env deployment/mariadb --from=secret/my-secret		oc set env deployment/mariadb --from=secret/my-secret (--prefix=MYSQL_)

	== Create Deployment from image ==		== Create Deployment from image ==

2026-02-06T20:31:12Z

Set environment variables afterwards

← Older revision		Revision as of 20:31, 6 February 2026
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	(Not recommended for passwords; you'd better set secrets and configmaps, s. below)		(Not recommended for passwords; you'd better set secrets and configmaps, s. below)

			oc set env deployment/mariadb --from=secret/my-secret

	== Create Deployment from image ==		== Create Deployment from image ==

2026-02-06T11:39:23Z

configmap

← Older revision		Revision as of 11:39, 6 February 2026
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	=== configmap ===		=== configmap ===
	$ oc set volume deployment/<mydeployment> --add --type configmap --name <myvol> --configmap-name <mymap> --mount-path </var/www/html>		$ oc set volume deployment/<mydeployment> --add --type configmap --name <myvol> --configmap-name <mymap> --mount-path < /var/www/html >

	=== pvc ===		=== pvc ===

2026-01-25T09:50:17Z

Create Secret

← Older revision		Revision as of 09:50, 25 January 2026
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	=== as TLS secret ===		=== as TLS secret ===
	$ oc create secret tls <secret-tls> --cert /tmp/mydomain.crt --key /tmp/mydomain.key		$ oc create secret tls <secret-tls> --cert /tmp/mydomain.crt --key /tmp/mydomain.key

			=== Update Secret ===
			$ oc set data secret/<mysecret> --from-file /tmp/root-password

			=== Extract secret ===
			$ oc extract secret /<mysecret> --to /tmp/mysecret (--confirm)

	== Create configmap from file ==		== Create configmap from file ==

2026-01-25T09:32:41Z

from file

← Older revision		Revision as of 09:32, 25 January 2026
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	=== from file ===		=== from file ===
	$ oc create secret generic <~~mysecret~~> --from-file id_rsa=/path-to/id_rsa --from-file id_rsa.pub=/path-to/id_rsa.pub		$ oc create secret generic <sshkeys> --from-file id_rsa=/path-to/id_rsa --from-file id_rsa.pub=/path-to/id_rsa.pub

	=== as TLS secret ===		=== as TLS secret ===

2026-01-25T09:32:01Z

Create Secret

← Older revision		Revision as of 09:32, 25 January 2026
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	=== from file ===		=== from file ===
	$ oc create secret generic --from-file id_rsa=/path-to/id_rsa --from-file id_rsa.pub=/path-to/id_rsa.pub		$ oc create secret generic <mysecret> --from-file id_rsa=/path-to/id_rsa --from-file id_rsa.pub=/path-to/id_rsa.pub

	=== as TLS secret ===		=== as TLS secret ===
	$ oc create secret tls secret-tls --cert /tmp/mydomain.crt --key /tmp/mydomain.key		$ oc create secret tls <secret-tls> --cert /tmp/mydomain.crt --key /tmp/mydomain.key

	== Create configmap from file ==		== Create configmap from file ==