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kubernetesistiodocker-registry

Istio installation failed with private docker registry

Bug description

Installation gets timeout errors and in kubectl get pods -n istio-system shows ImagePullBackOff.

kubectl describe pod istiod-xxx-xxx -n istio-system

Failed to pull image "our-registry:5000/pilot:1.10.3": rpc error: code = Unknown desc = Error response from daemon: Head https://our-registry:5000/v2/pilot/manifests/1.10.3: no basic auth credentials

Affected product area (please put an X in all that apply)

[x] Installation

Expected behavior

Successful installation with istioctl install --set profile=demo --set hub=our-registry:5000

Steps to reproduce the bug

  • Create istio-system namespace.

  • Set docker-registry user credentials for istio-system namespace.

  • istioctl manifest generate --set profile=demo --set hub=our-registry:5000 > new-generated-manifest.yaml

  • Verify it has proper images with our-registry:5000

  • Pull and push required images to our-registry:5000

  • istioctl install --set profile=demo --set hub=our-registry:5000

Version

Kubernetes : v1.21

Istio : 1.10.3 / 1.7.3

How was Istio installed?

istioctl install --set profile=demo --set hub=our-registry:5000

[References]

  1. Tried to setup imagePullSecrets as described here, but it gives

Json object error 2. Here describe about using it in charts, but dont know how they applied it.

Originally posted as an issue.

Solution

  • There are two ways to cirumvent this issue.

    If installing with istioctl install

    Using istioctl install provide a secret with docker-registry auth details with --set values.global.imagePullSecrets. Like this

    istioctl install [other options] --set values.global.imagePullSecrets[0]=<auth-secret>

    Where <auth-secret> is the secret created prior on the cluster.
    You can read more about using secrets with docker repository here

    If installing using Istio operator

    Installing Istio with operator, from private regostry, you have to pass proper YAML:

    apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
...
spec:
  profile: demo #as an example
  values:
    global:
      imagePullSecrets:
      - <auth-secret>
...

    Again, <auth-secret> must be created prior.