How to determine if volume is already existing in OpenShift 3?

Question

Im trying to create a step in my Jenkins pipeline wherein I would like to determine if a volume is already existing, if it is not existing then i will issue an oc set volume dc/mydeployment-config ... command, if its already existing then i will just use the --overwrite option.

I'm looking at jsonpath to determine if the expected name of my volume is already there, here is what i have right now.

$.spec.template.spec.volumes[?(@.name == 'mydeployment-volume')].name

I also tried this

oc set volume dc/mydeployment-config -o jsonpath={'$.spec.template.spec.volumes[?(@.name == 'mydeployment-volume')].name'}

The error was

error: --list and --output may not be specified together

Can anyone nudge me in the right direction to determine the correct

oc set volume

command to use? Or if there is a better way to do this?

Since your checking volumes on a DC, why not just use oc get DC with your -o jsonpath? — Will Gordon, Jan 29 '19 at 14:10
@WillGordon I was able to implement this based on your comment. If you put an answer, i can accept it. — bencampbell_14, Mar 29 '19 at 11:05

score 1 · Accepted Answer · answered Mar 29 '19 at 16:33

To find volumes attached to a DeploymentConfig, you should be using oc get dc, so something like

oc get dc/mydeployment-config -o jsonpath={'$.spec.template.spec.volumes[?(@.name == 'mydeployment-volume')].name'}

should show you if your volume is already attached to this DeploymentConfig.

If you simply just want to see the volumes that already exist, you can run

oc get pv

to see all the persistent volumes created.

How to determine if volume is already existing in OpenShift 3?

1 Answers1