Explicitly list the container registry by default

[jcpunk]

For my auditors, they want the registry listed for each container we are running. Storing it here makes generating my reports much easier.

[anothertobi]

This would introduce a breaking change for everyone currently configuring a registry as part of .image.repository like:

image:
  repository: registry.mycompany.com/rancher/local-path-provisioner

resulting in (broken):

image: "docker.io/registry.mycompany.com/rancher/local-path-provisioner:master-head"

We could use a backwards-compatible approach, like the rancher-system charts:

• https://github.com/rancher/system-charts/blob/dev-v2.7/charts/rancher-monitoring/v0.3.2/values.yaml#L384-L385
• https://github.com/rancher/system-charts/blob/dev-v2.7/charts/rancher-monitoring/v0.3.2/templates/_helpers.tpl#L126-L132
• https://github.com/rancher/system-charts/blob/dev-v2.7/charts/rancher-monitoring/v0.3.2/charts/prometheus/templates/prometheus.yaml#L87

However, this still requires you to provide custom values with the registry. I don't see a backwards-compatible way that would allow us to configure docker.io as the default registry in the Helm chart (non-empty default registry) since there are also some edge-cases where systems don't default to docker.io when no registry is given.

[jcpunk]

That possibility non-defaulting to docker.io is what has our audit team concerned. Without an explicit origin path they are uncomfortable. I figured that discomfort might be shared by others and was hopeful for some sort of way clean up my site and provide something beneficial.

I could switch the default registry to None and wrap it in logic so we don't get a weird leading / and keep docker.io in my local values.yaml but still track the image and tag from the chart. Having the chart default to explicit would be my ideal, but sometimes life is like that.

[derekbit]

@jcpunk The break change is a concern. Need to figure out a solution to it.

[github-actions]

This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days.

[jcpunk]

I'll confess some interest in this still

[github-actions]

This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days.

[jcpunk]

I'll confess some interest in this still

[github-actions]

This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days.

[jcpunk]

I'll confess some interest in this still, any thoughts on how to proceed?

[derekbit]

@jcpunk let's put it in the next release. Thanks.

[github-actions]

This PR is stale because it has been open 45 days with no activity. Remove stale label or comment or this will be closed in 10 days.

[jcpunk]

I'd still like to see some version of this.