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Using Third-Party Images

Updated on 2024-01-04 GMT+08:00

Scenario

CCE allows you to create workloads using images pulled from third-party image repositories.

Generally, a third-party image repository can be accessed only after authentication (using your account and password). CCE uses the secret-based authentication to pull images. Therefore, create a secret for an image repository before pulling images from the repository.

Prerequisites

The node where the workload is running is accessible from public networks.

Using the Console

  1. Create a secret for accessing a third-party image repository.

    Click the cluster name to access the cluster console. In the navigation pane, choose Configurations & Secrets. On the Secrets tab page, click Create Secret in the upper right corner. Set Secret Type to kubernetes.io/dockerconfigjson. For details, see Creating a Secret.

    Enter the username and password used to access the third-party image repository.

  2. When creating a workload, enter a private image path in the format of domainname/namespace/imagename:tag in Image Name and select the key created in 1.
  3. Set other parameters and click Create Workload.

Using kubectl

  1. Use kubectl to connect to the cluster. For details, see Connecting to a Cluster Using kubectl.
  2. Use kubectl to create a secret of the kubernetes.io/dockerconfigjson.

    kubectl create secret docker-registry myregistrykey  -n default --docker-server=DOCKER_REGISTRY_SERVER --docker-username=DOCKER_USER --docker-password=DOCKER_PASSWORD --docker-email=DOCKER_EMAIL

    In the preceding command, myregistrykey indicates the key name, default indicates the namespace where the key is located, and other parameters are as follows:

    • DOCKER_REGISTRY_SERVER: address of a third-party image repository, for example, www.3rdregistry.com or 10.10.10.10:443
    • DOCKER_USER: account used for logging in to a third-party image repository
    • DOCKER_PASSWORD: password used for logging in to a third-party image repository
    • DOCKER_EMAIL: email of a third-party image repository

  3. Use a third-party image to create a workload.

    A kubernetes.io/dockerconfigjson secret is used for authentication when you obtain a private image. The following is an example of using the myregistrykey for authentication.
    apiVersion: v1
    kind: Pod
    metadata:
      name: foo
      namespace: default
    spec:
      containers:
        - name: foo
          image: www.3rdregistry.com/janedoe/awesomeapp:v1
      imagePullSecrets:
        - name: myregistrykey              # Use the created secret.

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