ACM and ArgoCD integration that deploys an application to all ACM managed cluster using ArgoCD.
The idea is to have ACM managing clusters and give Argo visibility to it so Argo can sync your application repositories with them.
We will need at least two fresh installed OCP clusters, one to act as Hub and another to be added as a managed cluster so we can see Argo sync and deploy the resources onto it.
First lets deploy ACM Hub operator and OpenShift GitOps operator which will also create your ACM Hub and ArgoCD instances.
until oc apply -k gitops/manifests/bootstrap/openshift-gitops-operator/base; do sleep 5; done
until oc apply -k gitops/manifests/bootstrap/advanced-cluster-management/base; do sleep 15; done
In the ACM view in the console, we will add the spoke cluster as managed cluster, this is a manual step, we will have to add labels to the managed and local clusters so the integration between ACM and Argo works (via ManagedClusterSet).
When adding the remote cluster, note that it must be in the demo cluster set. Also make sure your local-cluster is transfered to the demo cluster set.
Your local-cluster needs the env=test label and your remote cluster needs the env=prod label.
As a option to the UI method of assigning the clusters to the demo cluster set and adding the proper labels you can execute this:
oc label managedcluster <name-of-your-remote-cluster> cluster.open-cluster-management.io/clusterset=demo env=prod
oc label managedcluster local-cluster cluster.open-cluster-management.io/clusterset=demo env=test
The last step is to create the ApplicationSet in Argo that will create application objects to represent every deployment on every cluster that are part of the cluster set demo. We can create it by executing:
oc apply -k gitops/manifests/content/demo/apps/base
After provisioning the operators and deploying the application using the app of apps pattern with Argo, we can validate it by checking:
Your managed clusters:
oc get managedcluster
Your placement rule:
oc get placement -n openshift-gitops
Your GitOps cluster:
oc get gitopscluster demo-gitops-cluster -n openshift-gitops -o=jsonpath='{.status.message}'
Now, open the Argo web console and check the two created applications and that is synced with both clusters, also check the pods under the welcome project, they should be running the nodejs sample application.