I'm new to k8s and I'm trying to learn how to setup deployments.
I'm searching for a way to create a new deployment without any images. Over time, I will add new (0 or more) images (and specify thier desired state). As I don't know what images the deployment will contain in advance, I can't use any existing configuration files.
Is it possible? If yes, how?
If you want to start a single instance of nginx, you can do
$ kubectl run nginx --image=nginxBut it is not possible to create any deployments without image.
$ kubectl run demo --image=""
error: --image is requiredIf you want to edit your existing deployment, then you can run
$ kubectl edit deployments <deployment-name> -n <namespace>You can also patch container with new image to existing deployments by running following command
$ kubectl patch deployment <deployment-name> -p '{"spec":{"template":{"spec":{"containers":[{"name":"myapp","image":"newimage"}]}}}}'To replace image of a containers in deployment, run
$ kubectl set image deployment/<deployment-name> <container-name>=<image>