Migrating FRR-K8s resources

All user-created FRR-K8s custom resources (CRs) in the metallb-system namespace under OpenShift Container Platform 4.17 and earlier releases must be migrated to the openshift-frr-k8s namespace. As a cluster administrator, complete the steps in this procedure to migrate your FRR-K8s custom resources.

Migrating FRR-K8s resources

You can migrate the FRR-K8s FRRConfiguration custom resources from the metallb-system namespace to the openshift-frr-k8s namespace.

Prerequisites

You have installed the OpenShift CLI (oc).
You are logged in to the cluster as a user with the cluster-admin role.

Procedure

When upgrading from an earlier version of OpenShift Container Platform with the Metal LB Operator deployed, you must manually migrate your custom FRRConfiguration configurations from the metallb-system namespace to the openshift-frr-k8s namespace. To move these CRs, enter the following commands:

To create the openshift-frr-k8s namespace, enter the following command:
```
$ oc create namespace openshift-frr-k8s
```

To automate the migration, create a shell script named migrate.sh with the following contents:

#!/bin/bash
OLD_NAMESPACE="metallb-system"
NEW_NAMESPACE="openshift-frr-k8s"
FILTER_OUT="metallb-"
oc get frrconfigurations.frrk8s.metallb.io -n "${OLD_NAMESPACE}" -o json |\
  jq -r '.items[] | select(.metadata.name | test("'"${FILTER_OUT}"'") | not)' |\
  jq -r '.metadata.namespace = "'"${NEW_NAMESPACE}"'"' |\
  oc create -f -

To execute the migration, run the following command:
```
$ bash migrate.sh
```

Verification

To confirm that the migration succeeded, run the following command:
```
$ oc get frrconfigurations.frrk8s.metallb.io -n openshift-frr-k8s
```

After the migration is complete, you can remove the FRRConfiguration custom resources from the metallb-system namespace.