- Check how many replicasets there are.
kubectl get replicaset- How to find the images that are used to create the pods in a replicaset.
kubectl describe replicaset <name_of_replica_set>
- The image is listed under
Pod Template.
- You can also see the amount of pods that are ready.
- To check why the pods are not in ready status, just describe one of the pods from the
kubectl describe replicaset <name_of_replica_set> output, with kubectl describe pod <pod_name>.
- Delete one of the pods.
kubectl delete pod <pod_name>
- The replicaset always ensures the amount of pods are continually available, even if you delete a pod, a new pod will be created in its place.
- Can find more information by running the
kubectl explain replicaset command, can see apiVersion and similar items.
- Make sure that the labels are always the same in the replicaset yaml file.
- To check for replicasets, can use
kubectl get rs.
- To delete replicasets, can use
kubectl delete rs replicaset-here.
- To edit a replicaset to fix an image, can run
kubectl edit rs replicaset-here.
- An example is changing the container image name.
- If you update an image in a replicaset, the pods are not automatically updated or recreated.
- Can delete multiple pods by using
kubectl delete pods pod1 pod2 pod3 pod4.
- To scale a replicaset, can use the command
kubectl scale rs replicaset-here --replicas=5.