Allow setting only the registry for docker images in the helm chart instead of full URI

[komapa]

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Is your feature request related to a problem? Please describe.

Yes. Let me explain :)

We are mirroring all of consul-k8s dependent images in our private registry in the following format:

      global:
        image: ${local.registry}/hub/hashicorp/consul-enterprise:${local.consul_version}
        imageK8S: ${local.registry}/hub/hashicorp/consul-k8s-control-plane:${local.consul_chart_version}
        imageConsulDataplane: ${local.registry}/hub/hashicorp/consul-dataplane:${local.consul_chart_version}

The immediate problem is that releases for 1.1.x do not track the same versioning in consul-dataplane project! consul-k8s is at 1.1.8 but consul-dataplane is at 1.1.7 and the above logic fails while it works perfectly for 1.2.x and 1.3.x series.

Feature Description

It will be great if we can just specify:

global:
   registry: ${local.registry}/hub/hashicorp

and then you fill in with consul-k8s-control-plane:1.1.8 and consul-dataplane:1.1.7 the rest.

Use Case(s)

Using private registries

[dmpe]

Yes, this is pretty much required. No idea why it hasn't been done yet. It makes using renovate bot so much harder...

[komapa]

@david-yu if this is a "breaking change" like you mentioned in #644, can we at least bring consul-dataplane versioning in line with the versioning of consul-k8s? We got bit again just now because the official 1.1.11 was released and overwrite out mirrored image and started erroring for envoy.tracing (unrelated issue but proving the point).

Just make the versions at least match for 1.1.x just like they do for the other minor versions and will make the problem a little worse.

Thanks!