docs: Document setting dashboard_url on k8s

[lkysow]

It's tricky because the {{ needs to be escaped with Helm.

Fixes hashicorp/consul-helm#1006

[johncowen]

Hey @lkysow 👋

I always wondered whether we should support JS style TemplateLiteral interpolation here so "${}":

http://myvirtualmachine:3000/d/4Z9CWegnz/test-consul?orgId=1&var-service=${Service.Name}&var-namespace=${Service.Namespace}&var-dc=${Datacenter}

Would that help us not get into a situation where escaping is needed, does ${} have any special meaning in helm-land?

[lkysow]

Would that help us not get into a situation where escaping is needed, does ${} have any special meaning in helm-land?

Yes that would work. Helm uses go templating so that's why there's an issue since Consul's using that too.

[david-yu]

LGTM

[hc-github-team-consul-core]

🍒 If backport labels were added before merging, cherry-picking will start automatically.

To retroactively trigger a backport after merging, add backport labels and re-run https://circleci.com/gh/hashicorp/consul/401017.

[hc-github-team-consul-core]

🍒✅ Cherry pick of commit 68c4c23 onto stable-website succeeded!

[hc-github-team-consul-core]

🍒✅ Cherry pick of commit 68c4c23 onto release/1.10.x succeeded!