I want to write a wrapper on kubectl to display only failed pods which means it should only display items whose Ready column values are not the same (i.e 0/1, 0/2, 1/2, 2/3, etc.)
$ kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
default pod-with-sidecar 1/2 ErrImagePull 0 39s
kube-system calico-node-chcqq 2/2 Running 2 7d
kube-system calico-policy-controller-6449789dd6-z5t5j 1/1 Running 0 7d
kube-system etcd 1/1 Running 0 7d
kube-system kube-apiserver 1/1 Running 2 7d
kube-system kube-controller-manager 1/1 Running 0 7d
kube-system kube-dns-5c76d6bddb-8zhmq 3/3 Running 1 7d
kube-system kube-proxy-xq8j6 1/1 Running 0 7d
kube-system kube-scheduler- 1/1 Running 0 7d
kube-system tiller-deploy-5b7cb9cfd7-j725s 1/1 Running 0 7d
my-system glusterfs-brick-0 0/2 Pending 0 3m
my-system sticky-scheduler-6d968f8d74-xvjqn 0/1 ImagePullBackOff 0 4mso from the above output i want to print these failed pods
NAMESPACE NAME READY STATUS RESTARTS AGE
default pod-with-sidecar 1/2 ErrImagePull 0 4m
my-system glusterfs-brick-0 0/2 Pending 0 56s
my-system sticky-scheduler-6d968f8d74-xvjqn 0/1 ImagePullBackOff 0 8mThis works!
$ kubectl get pods --all-namespaces | grep -vE '1/1|2/2|3/3'
NAMESPACE NAME READY STATUS RESTARTS AGE
default pod-with-sidecar 1/2 ErrImagePull 0 4m
my-system glusterfs-brick-0 0/2 Pending 0 56s
my-system sticky-scheduler-6d968f8d74-xvjqn 0/1 ImagePullBackOff 0 8mBut it won't work if i have 2/4,0/4,0/5,0/6 etc in the Ready column, what can i do with grep -vE '1/1|2/2|3/3' to make it work for all such cases
Reference: https://github.com/kubernetes/kubernetes/issues/49387
You can do it by using --field-selector:
kubectl get pods --all-namespaces --field-selector=status.phase!=RunningWith GNU grep:
| grep -Ev '([0-9]+)/\1'Output:
NAMESPACE NAME READY STATUS RESTARTS AGE default pod-with-sidecar 1/2 ErrImagePull 0 39s my-system glusterfs-brick-0 0/2 Pending 0 3m my-system sticky-scheduler-6d968f8d74-xvjqn 0/1 ImagePullBackOff 0 4m