How to List all Containers Running in a Cluster

Problem

View all the containers runnings inside a cluster.

Environment

• Platform9 Managed Kubernetes - All Versions
• kubectl

Procedure

1. Download the kubeconfig for the cluster you want the information for.
2. Save the kubeconfig at the following path ~/.kube/config or run the kubectl command with the --kubeconfig= command
3. Run the following command to get a list and number of running containers of each type.

kubectl get pods --all-namespaces -o jsonpath="{.items[*].spec.containers[*].name}" | tr -s ' ' '\n' |sort |uniq -c

Additional Information

You can obtain other information about the containers by changing the spec. value. For example you can get a list and number of all images running in a cluster by running the above command with spec.containers[*].image.