ACM + ArgoCD

# managedclustersetbinding.yaml
cat << EOF | oc apply -f -
apiVersion: cluster.open-cluster-management.io/v1alpha1
kind: ManagedClusterSetBinding
metadata:
  name: production-clusters
  namespace: openshift-gitops
spec:
  clusterSet: production-clusters
EOF

# managedclusterset.yaml
cat << EOF | oc apply -f -
apiVersion: cluster.open-cluster-management.io/v1alpha1
kind: ManagedClusterSet
metadata:
  name: production-clusters
spec: {}
EOF

# gitopscluster.yaml 
cat << EOF | oc apply -f -
apiVersion: apps.open-cluster-management.io/v1beta1
kind: GitOpsCluster
metadata:
  name: argo-acm-importer
  namespace: openshift-gitops
spec:
  argoServer:
    cluster: notused
    argoNamespace: openshift-gitops
  placementRef:
    kind: Placement
    apiVersion: cluster.open-cluster-management.io/v1alpha1
    name: production-clusters
    namespace: openshift-gitops
EOF

# placement.yaml
cat << EOF | oc apply -f -
apiVersion: cluster.open-cluster-management.io/v1alpha1
kind: Placement
metadata:
  name: production-clusters
  namespace: openshift-gitops
spec:
  predicates:
  - requiredClusterSelector:
      labelSelector:
        matchExpressions:
        - key: vendor
          operator: "In"
          values:
          - OpenShift
EOF