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Chapter 3. Configuring IAM for IBM Cloud VPC
In environments where the cloud identity and access management (IAM) APIs are not reachable, you must put the Cloud Credential Operator (CCO) into manual mode before you install the cluster.
3.1. 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.
Storing an administrator-level credential secret in the cluster kube-system project is not supported for IBM Cloud; therefore, you must set the credentialsMode parameter for the CCO to Manual when installing OpenShift Container Platform 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
3.2. Configuring the Cloud Credential Operator utility
To create and manage cloud credentials from outside of the cluster when the Cloud Credential Operator (CCO) is operating in manual mode, extract and prepare the CCO utility (ccoctl) binary.
The ccoctl utility is a Linux binary that must run in a Linux environment.
Prerequisites
- You have access to an OpenShift Container Platform account with cluster administrator access.
-
You have installed the OpenShift CLI (
oc).
Procedure
Obtain the OpenShift Container Platform release image by running the following command:
$ RELEASE_IMAGE=$(./openshift-install version | awk '/release image/ {print $3}')Obtain the CCO container image from the OpenShift Container Platform release image by running the following command:
$ CCO_IMAGE=$(oc adm release info --image-for='cloud-credential-operator' $RELEASE_IMAGE -a ~/.pull-secret)
NoteEnsure that the architecture of the
$RELEASE_IMAGEmatches the architecture of the environment in which you will use theccoctltool.Extract the
ccoctlbinary from the CCO container image within the OpenShift Container Platform release image by running the following command:$ oc image extract $CCO_IMAGE --file="/usr/bin/ccoctl" -a ~/.pull-secret
Change the permissions to make
ccoctlexecutable by running the following command:$ chmod 775 ccoctl
Verification
To verify that
ccoctlis ready to use, display the help file by running the following command:$ ccoctl --help
Output of
ccoctl --helpOpenShift credentials provisioning tool Usage: ccoctl [command] Available Commands: alibabacloud Manage credentials objects for alibaba cloud aws Manage credentials objects for AWS cloud gcp Manage credentials objects for Google cloud help Help about any command ibmcloud Manage credentials objects for IBM Cloud nutanix Manage credentials objects for Nutanix Flags: -h, --help help for ccoctl Use "ccoctl [command] --help" for more information about a command.
Additional resources
