Manually creating IAM for Azure

In environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace, you can put the Cloud Credential Operator (CCO) into manual mode before you install the cluster.

Alternatives to storing administrator-level secrets in the kube-system project

The Cloud Credential Operator (CCO) manages cloud provider credentials as Kubernetes custom resource definitions (CRDs). You can configure the CCO to suit the security requirements of your organization by setting different values for the credentialsMode parameter in the install-config.yaml file.

If you prefer not to store an administrator-level credential secret in the cluster kube-system project, you can set the credentialsMode parameter for the CCO to Manual when installing OKD and manage your cloud credentials manually.

Using manual mode allows each cluster component to have only the permissions it requires, without storing an administrator-level credential in the cluster. You can also use this mode if your environment does not have connectivity to the cloud provider public IAM endpoint. However, you must manually reconcile permissions with new release images for every upgrade. You must also manually supply credentials for every component that requests them.

Additional resources

Manually create IAM

The Cloud Credential Operator (CCO) can be put into manual mode prior to installation in environments where the cloud identity and access management (IAM) APIs are not reachable, or the administrator prefers not to store an administrator-level credential secret in the cluster kube-system namespace.

Procedure

  1. Change to the directory that contains the installation program and create the install-config.yaml file:

    1. $ openshift-install create install-config --dir <installation_directory>

    where <installation_directory> is the directory in which the installation program creates files.

  2. Edit the install-config.yaml configuration file so that it contains the credentialsMode parameter set to Manual.

    Example install-config.yaml configuration file

    1. apiVersion: v1
    2. baseDomain: cluster1.example.com
    3. credentialsMode: Manual (1)
    4. compute:
    5. - architecture: amd64
    6.   hyperthreading: Enabled
    7. ...
    1This line is added to set the credentialsMode parameter to Manual.

  3. Generate the manifests by running the following command from the directory that contains the installation program:

    1. $ openshift-install create manifests --dir <installation_directory>

    where:

    <installation_directory>

    Specifies the directory in which the installation program creates files.

  4. Copy the generated credential files to the target manifests directory:

    1. $ cp ./<path_to_ccoctl_output_dir>/manifests/*credentials.yaml ./<path_to_installation>dir>/manifests/

    where:

    <path_to_ccoctl_output_dir>

    Specifies the directory created by the ccoctl alibabacloud create-ram-users command.

    <path_to_installation>dir>

    Specifies the directory in which the installation program creates files.

  5. From the directory that contains the installation program, obtain details of the OKD release image that your openshift-install binary is built to use:

    1. $ openshift-install version

    Example output

    1. release image quay.io/openshift-release-dev/ocp-release:4.y.z-x86_64

  6. Locate all CredentialsRequest objects in this release image that target the cloud you are deploying on:

    1. $ oc adm release extract quay.io/openshift-release-dev/ocp-release:4.y.z-x86_64 --credentials-requests --cloud=azure

    This command creates a YAML file for each CredentialsRequest object.

    Sample CredentialsRequest object

    1. apiVersion: cloudcredential.openshift.io/v1
    2. kind: CredentialsRequest
    3. metadata:
    4.   labels:
    5.     controller-tools.k8s.io: "1.0"
    6.   name: openshift-image-registry-azure
    7.   namespace: openshift-cloud-credential-operator
    8. spec:
    9.   secretRef:
    10.     name: installer-cloud-credentials
    11.     namespace: openshift-image-registry
    12.   providerSpec:
    13.     apiVersion: cloudcredential.openshift.io/v1
    14.     kind: AzureProviderSpec
    15.     roleBindings:
    16.     - role: Contributor

  7. Create YAML files for secrets in the openshift-install manifests directory that you generated previously. The secrets must be stored using the namespace and secret name defined in the spec.secretRef for each CredentialsRequest object. The format for the secret data varies for each cloud provider.

  8. From the directory that contains the installation program, proceed with your cluster creation:

    1. $ openshift-install create cluster --dir <installation_directory>

    Before upgrading a cluster that uses manually maintained credentials, you must ensure that the CCO is in an upgradeable state.

Additional references

Admin credentials root secret format

Each cloud provider uses a credentials root secret in the kube-system namespace by convention, which is then used to satisfy all credentials requests and create their respective secrets. This is done by copying the credentials root secret with passthrough mode.

The format for the secret varies by cloud, and is also used for each CredentialsRequest secret.

Microsoft Azure secret format

  1. apiVersion: v1
  2. kind: Secret
  3. metadata:
  4.   namespace: kube-system
  5.   name: azure-credentials
  6. stringData:
  7.   azure_subscription_id: <SubscriptionID>
  8.   azure_client_id: <ClientID>
  9.   azure_client_secret: <ClientSecret>
  10.   azure_tenant_id: <TenantID>
  11.   azure_resource_prefix: <ResourcePrefix>
  12.   azure_resourcegroup: <ResourceGroup>
  13.   azure_region: <Region>

On Microsoft Azure, the credentials secret format includes two properties that must contain the cluster’s infrastructure ID, generated randomly for each cluster installation. This value can be found after running create manifests:

  1. $ cat .openshift_install_state.json | jq '."*installconfig.ClusterID".InfraID' -r

Example output

  1. mycluster-2mpcn

This value would be used in the secret data as follows:

  1. azure_resource_prefix: mycluster-2mpcn
  2. azure_resourcegroup: mycluster-2mpcn-rg

Next steps