Pass User-Agent info to container that has the CLI in it

[jillianwilson]

Have you tested this locally?

[edif2008]

The injector itself needs the following updates:

• Update go dependencies (may require Go 1.19)
• Change AdmissionResponse from v1beta1 to v1
• Add the MetaType content to make the response complete:

  TypeMeta: metav1.TypeMeta{
    APIVersion: "admission.k8s.io/v1",
    Kind:       "AdmissionReview",
  }

• Add the vendor directory in the repo by running go mod vendor
• Adjust the Dockerfile to get the proper files needed in the right way
• Add some scripts that generate and place the certificate in your Kubernetes cluster. NOTE: This is subject to change since we may want to do this step on the fly, when the webhook is deployed.

The working injector can be found in the test-env-inject branch.

I have tested the working version of the injector and indeed in the response it passes the User-Agent info required for the CLI.

[edif2008]

@jillianwilson The updates for the injector to work are in this PR: https://github.com/1Password/kubernetes-secret-injector/pull/5

Note that the updates don't include the certificate management. That is still work in progress. However, these are valid and shouldn't depend on the certificate management part.

[jillianwilson]

As long as this has been tested and verified to work I am happy with this :)