I have a yaml file which I can use to create pods. I am using the dashboard so I can simply select yaml file and it will create pods. Pod will start the container and container will run the docker image. So now lets say I have done some changes in the docker image and want to deploy it again. For this, I will delete the already running pod and will upload the yaml file.
Instead of deleting and uploading yaml file again, is there any keyword available which will delete the already running pod/deployment and will recreate it.
Thanks
I can't remember the StackOverflow question where I first saw this method, but here it is again:
kubectl --namespace thenamespace get pod thepod -o yaml | kubectl replace --save-config -f -
You can do that with all k8s resources.
If you are using this for development you might get away with
containers:
- image: my/app:dev
imagePullPolicy: AlwaysWith this, whenever your pod is recreated, you will get fresh image version.
That said, you need to use something like Deployment to have a pod restarted automaticaly, and then you can just kubectl delete my-pod-xxxxx-yyy to wipe old one and in few sec get the fresh, current one.
For prod, don't do that please. Just use tagged images and apply changed image to your Deployment with kubectl apply -f my.yaml or preferably something like Helm (but that is more complicated topic for starters)