[SOLVED] Extracting kubernetes pod name using shell script

Issue

I want to extract a pod name from a list of pods available on kubernetes. For example, for the following command

kubectl get pods -n namespace

NAME          READY   STATUS            RESTARTS   AGE
pod1          1/1     Running           2          46d
pod2          1/1     Running           0          46d
test-pod3-yy  0/1     ImagePullBackOff  0          338d
test-pod3-xx  1/1     Running           0          255d

I want to extract pod test-pod3-xx using shell script. Currently this is the command that I'm using

POD_NAME=$(kubectl get pods -n namespace | grep testpod-3 | cut -d' ' -f1)

With this I get both the pods test-pod3-yy and test-pod3-xx but I want to extract the pod that is in running state. How can I do that?

Solution

You can use the field-selector and check for running only:

--field-selector=status.phase=Running

You could also use the -o name flag, to get only the names. With that you'll get:

$ kubectl get pods -n namespace -o name --field-selector=status.phase=Running
pod/pod1
pod/pod2
pod/test-pod3-xx

Answered By - Chris

Answer Checked By - Pedro (WPSolving Volunteer)