Deployments.md

ROLLING UPDATE WITH A REPLICATIONCONTROLLER

Cleanup existing pods and replicasets

create RC and svc

kubectl apply -f kubia-rc-and-service-v1.yaml

kubectl get svc kubia

repeat the below command to see various different result

curl http://<clusterIP>:80

now perform rolling update

kubectl rolling-update kubia-v1 kubia-v2 --image=luksa/kubia:v2

 kubectl describe rc kubia-v2

Do it more declaratively

kubectl create -f kubia-deployment-v1.yaml --record

kubectl rollout status deployment kubia

patching a deployment

kubectl patch deployment kubia -p '{"spec": {"minReadySeconds": 10}}'

change image

kubectl set image deployment kubia nodejs=luksa/kubia:v2

kubectl set image deployment kubia nodejs=luksa/kubia:v3

You can follow the progress of the rollout with kubectl rollout status:

kubectl rollout status deployment kubia

kubectl rollout undo deployment kubia

kubectl rollout history deployment kubia

kubectl rollout undo deployment kubia --to-revision=1
kubectl rollout pause deployment kubia
kubectl rollout resume deployment kubia

update deployment with readiness probe:

$ kubectl apply -f kubia-deployment-v3-with-readinesscheck.yaml
deployment "kubia" configured