Deploy boards docs

We're missing docs for the deploy boards!

• Issue: https://gitlab.com/gitlab-org/gitlab-ee/issues/1589
• MR: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1233

From my understanding:

1. You should have a Kubernetes cluster up and running
2. GitLab Runner using Docker or Kubernetes executor
3. Enable the Kubernetes service in your project as described in https://docs.gitlab.com/ee/user/project/integrations/kubernetes.html
4. Use an auto-deploy template https://docs.gitlab.com/ee/ci/autodeploy/index.html#auto-deploy
5. Navigate to the environments page and see the deploy boards

What I'm missing is what the deploy board is showing me.

• What are the green squares?
• What are the different colors of the squares?
• What is the percentage?

assigned to @axil

Use an auto-deploy template

@axil Using auto deploy isn't the only way. If you meet certain conditions, we can grab the info for other deploys as well.

The green squares represent pods in your k8s cluster that are associated with the given environment. The states represent the states of a deploy rolling out. The specific may different from the mockup, so we should get the definitive set from @ayufan or @nick.thomas or @filipa. The percentage is the percent of the pods that are updated to the latest release.

So far I've only seen Deploying and Finished as states for the pods.

mentioned in merge request !1467 (merged)

closed via commit 28baca8ad85b217af010a9774ec8f5c7b82943da

mentioned in commit 28baca8a

mentioned in commit 4063db15