I have created a cluster in gke and then create few deployments specific to my application. My question is how do i delete an specific image that has been up there because even though i have set my imagePullPolicy: Always in my deployment file it does not pull the latest image, instead it uses the cached image.

While i was working on my minikube i used to delete those images manually through this command minikube ssh — docker rmi image-name
But in gke what is the exact procedure?
Also, i do want to know why it does not pull my latest image according to the imagePullPolicy: Always?