Get pods in Kubernetes where all containers are "ready" in one line using kubectl

Question

We have cluster with Istio and also Jenkins job to get "stable" pods, which uses this kubectl query:

kubectl get po -o=jsonpath="{range .items[?(@.status.containerStatuses[-1].ready==true)]}{.spec.containers[0].image}{'\\n'}{end}"

registry/my-proj/admin:2.0.0.000123
registry/my-proj/foo:2.0.0.000123
registry/my-proj/bar:2.0.0.000123

This query fetches pods where last container (application) is ready, because we also have Istio sidecar containers. But here is tricky thing, it looks like array is built using alphabet, so if Istio container will be last - it fetches it as ready pod, because last container is ready.

I've tried to use go-template also, but the best thing I've managed to do

kubectl get po -o go-template='{{range .items}}{{range .status.containerStatuses}}{{if eq .ready true }}{{end}}{{end}}{{.metadata.name}}{{println}}{{end}}

registry/my-proj/admin:2.0.0.000123
registry/my-proj/admin:2.0.0.000123
registry/my-proj/foo:2.0.0.000123
registry/my-proj/foo:2.0.0.000123
registry/my-proj/bar:2.0.0.000123

It fetches 2 times pods where 2 containers are ready and only 1 if 1 container is ready.

TL;DR;

I am looking for ultimate query which can fetch pods where all containers are ready, thanks

Answer 1

If you are ok with grep, you can use the following command:

kubectl get pod |grep -Po '^([^ ]+)(?=\s+((\d+)\/\3))'

Example:

kubectl get pod
NAME    READY   STATUS     RESTARTS        AGE
bar     2/2     Running    0               5m12s
foo     1/3     NotReady   6               6m9s
mypod   1/1     Running    2 (9m58s ago)   21h

kubectl get pod |grep -Po '^([^ ]+)(?=\s+((\d+)\/\3))'
bar
mypod
ps@controller:~$