I want to undeploy pod/redeploy for previous image - meaning reverting of code. This should happen from kubernates dashboard. Like there is option to delete deployment in cluster dashboard .. similarly is there a way to undeploy or redeploy to previous image tag?
In Kubernetes Dashboard v1.8.1 and later, go to Workload->Deployment section, and when you press triple dot button to the left of any deployment, there is the "View/edit YAML" option right after "Scale" and "Delete" options.
When you select that option, YAML editor opens, and you can change the image property (e.g., set the previous one) and update the deployment. Changes are applied instantly.
You can't currently roll back from the dashboard, no. Actually there is an open feature request asking for it - https://github.com/kubernetes/dashboard/issues/2889
Rolling back a deployment from the command-line is possible (https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#rolling-back-a-deployment) or you could switch the image referenced by your deployment. But rollback is not currently a feature of the dashboard.