[Feat][Credential Provider] Registry mirror mapping

[lzhecheng]

What would you like to be added:

Need a new feature to support registry mirror mapping for credential provider. For example, the image URL is mcr.microsoft.com/test/acronly:dev, and credential provider fetches credential from xxx.azurecr.io ACR.

Steps:

1. docker push an image to an ACR xxx.azurecr.io/test/acronly:dev and set annonymous pull to false
2. Set up containerd config on Node

server = "https://mcr.microsoft.com"

[host."https://xxx.azurecr.io"]
  capabilities = ["pull", "resolve"]

3. Set up /var/lib/kubelet/credential-provider-config.yaml

apiVersion: kubelet.config.k8s.io/v1
kind: CredentialProviderConfig
providers:
  - name: acr-credential-provider
    matchImages:
      - "*.azurecr.io"
      - "*.azurecr.cn"
      - "*.azurecr.de"
      - "*.azurecr.us"
      - "mcr.microsoft.com"
    defaultCacheDuration: "10m"
    apiVersion: credentialprovider.kubelet.k8s.io/v1
    args:
      - /etc/kubernetes/azure.json
      - --mirror-mapping=mcr.microsoft.com:xxx.azurecr.io

5. Create a Pod using image mcr.microsoft.com/test/acronly:dev and image pull is successful

Why is this needed:

Credential provider supports registry host namespace in containerd config

[lzhecheng]

zhechengli@devbox:~$ kgpo
NAME                      READY   STATUS    RESTARTS        AGE
busybox-cd5485c9d-d5db2   1/1     Running   1 (5m23s ago)   65m
zhechengli@devbox:~$ kdpo busybox-cd5485c9d-d5db2
Name:         busybox-cd5485c9d-d5db2
Namespace:    default
Priority:     0
...
Containers:
  busybox:
    Container ID:  containerd://a886b73539abea83e596b1d76622be472252ff9d6bf768fc4c8ecf0d47ff15ff
    Image:         mcr.microsoft.com/test/acronly:dev
...
Events:
  Type    Reason   Age                  From     Message
  ----    ------   ----                 ----     -------
  Normal  Pulling  5m28s (x2 over 65m)  kubelet  Pulling image "mcr.microsoft.com/test/acronly:dev"
  Normal  Created  5m26s (x2 over 65m)  kubelet  Created container busybox
  Normal  Started  5m26s (x2 over 65m)  kubelet  Started container busybox
  Normal  Pulled   5m26s                kubelet  Successfully pulled image "mcr.microsoft.com/test/acronly:dev" in 1.14s (1.14s including waiting). Image size: 774778 bytes.