Provide a way for envoy sidecars to filter upstreams based on tags

[apollo13]

Feature Description

It would be very cool if it were possible to tell consul connect envoy to filter upstreams based on tags. This would be useful if one has a service named backend exposing http & metrics instances so envoy could access only the http instances.

Use Case(s)

I am currently trying to put nomad behind an envoy proxy for certain things and nomad registers instances with the tags serf, rpc and http. Now I'd like to relatively easily tell envoy to be a proxy for the http tag. I do know that I can configure subsets on the service resolver and then add an extra service that routes to that, but that is quite some overhead…

[Amier3]

A little late on the response, but thanks for the feature request florian! I'll make sure we have a conversation about this internally and report back with some thoughts.

[apollo13]

No worries, better late than never ☺️ let me know how the discussion turns out. Maybe there are alternative ways to filter the upstreams that I haven't thought about.

…

On Fri, Jul 8, 2022, at 17:29, Amier Chery wrote: A little late on the response, but thanks for the feature request florian! I'll make sure we have a conversation about this internally and report back with some thoughts. — Reply to this email directly, view it on GitHub <#11867 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAT5C6RX565DBMTQM2ADG3VTBCLZANCNFSM5KGJZWQQ>. You are receiving this because you authored the thread.Message ID: ***@***.***>

[apollo13]

So it seems like nomad is fixing this for my usecase via hashicorp/nomad#13143 -- didn't know that this was possible so easily (unless I missunderstood what the PR does).

[apollo13]

Also crosslinking to hashicorp/nomad#9914