Interacting with Kubernetes Pods using microk8s

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microk8s kubectl logs <pod-name>

• View the logs of a specific pod.

microk8s kubectl exec -it <pod-name> — /bin/sh

• Start an interactive shell inside a pod.

microk8s kubectl exec envar-demo — printenv

• Execute the printenv command inside the pod named envar-demo using MicroK8s.

Managing Deployments

microk8s kubectl create deployment <deployment-name> — image=<image-name>

• Create a new deployment.

microk8s kubectl expose deployment <deployment-name> — type=NodePort — port=<port>

• Expose a deployment as a NodePort service.

microk8s kubectl scale deployment <deployment-name> — replicas=<desired-replicas>

• Scale the number of replicas for a deployment.

microk8s kubectl delete pod <pod-name>

• Delete a specific pod.

microk8s kubectl delete deployment <deployment-name>

• Delete a deployment.

Configuration and Resources

microk8s kubectl apply -f <filename>

• Apply a configuration file to the cluster.

microk8s kubectl get pv

• List persistent volumes.

microk8s kubectl get pvc

• List persistent volume claims.

microk8s kubectl get configmaps

• List config maps.

microk8s kubectl get secrets

• List secrets.

microk8s kubectl get ingress

• List ingress resources.

Cluster Management and Troubleshooting

microk8s kubectl describe node <node-name>

• Get detailed information about a specific node.

microk8s kubectl proxy

• Start a proxy to access the Kubernetes API server.

microk8s kubectl get events

• List cluster events.

microk8s kubectl rollout history deployment <deployment-name>

• View the rollout history of a deployment.

microk8s kubectl rollout undo deployment <deployment-name> — to-revision=<revision>

• Rollback a deployment to a specific revision.

Additional Tips

microk8s kubectl get all

• List all resources in the current namespace.

microk8s kubectl exec -it <pod-name> — /bin/sh -n <namespace>

• Start an interactive shell inside a pod in a specific namespace.

microk8s kubectl port-forward <pod-name> <local-port>:<remote-port>

• Forward ports from a pod to your local machine.

microk8s kubectl label <resource> <resource-name> <key>=<value>

• Add a label to a resource.

microk8s kubectl exec envar-demo — printenv

• Execute the printenv command inside the pod named envar-demo using MicroK8s.

These kubectl and MicroK8s commands provide a comprehensive set of tools for managing, troubleshooting, and interacting with Kubernetes clusters. Experimenting with these commands in different scenarios will contribute to a deeper understanding of Kubernetes orchestration and enhance your proficiency in cluster management.