create cloudsql sidecar container

[bitvirago]

In what area(s)?

In service definition

What version of Knative?

0.7

Expected Behavior

I need to create more than one container in the Service definition.

Actual Behavior

If I want to create a google cloud sql sidecar container. I got the following error message:

Error from server (InternalError): error when creating "deploy-app.yaml": Internal error occurred: admission webhook "webhook.serving.knative.dev" denied the request: mutation failed: missing field(s): spec.template.spec.containers[0].image

Steps to Reproduce the Problem

My service definition:

apiVersion: serving.knative.dev/v1alpha1
kind: Service
metadata:
  name: test-svc
  namespace: test
spec:
  template:
    spec:
      containers:
        - image: gcr.io/cloudsql-docker/gce-proxy
        - image: hub.docker.com/_/hello-world

[markusthoemmes]

We don't allow for more than one container today in Knative Service/Configuration/Revision. See https://github.com/knative/serving/blob/master/docs/spec/spec.md

[dgerd]

As Markus mentioned is not currently supported today. That said that error message looks like a bug. It should be invalid field for the second container instead of missing for the first.

missing field(s): spec.template.spec.containers[0].image

[dgerd]

Created a bug for the error message: #4706

Going to change this to feature request.

[knative-housekeeping-robot]

Issues go stale after 90 days of inactivity.
Mark the issue as fresh by adding the comment /remove-lifecycle stale.
Stale issues rot after an additional 30 days of inactivity and eventually close.
If this issue is safe to close now please do so by adding the comment /close.

Send feedback to Knative Productivity Slack channel or file an issue in knative/test-infra.

/lifecycle stale

[dgerd]

Resolving this as duplicate of #5822

See https://github.com/mattmoor/bindings#googlecloudsqlbinding as a potential workaround for this Cloud SQL in current release.