physics-cluster-registration

Knative source to sink service to trigger steps upon cluster (OCM) registration

PHYSICS has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No. 101017047.

Deploy

The steps to deploy it are:

• Create the namespace, sa, role and role binding:

oc apply -f deploy/001-namespace.yaml
oc apply -f deploy/002-rbac.yaml

• Deploy the sink application handling the events:

oc apply -f deploy/003-secret.yaml  # update the secret yaml file accordingly
oc apply -f deploy/004-sink.yaml

Note you need to change the container image by the one where your actual sink is located

• [optional] instead of deploying a normal Kubernetes service/deployment, there is an option to deploy a knative service too, so that the application is scaled to 0 when not used, since cluster registration is sporadic action and this could lead to saving resources

oc apply -f deploy/003-secret.yaml  # update the secret yaml file accordingly
oc apply -f deploy/004b-sink.yaml

• Create the knative ApiServerSource by running the commant:

kn source apiserver physics-apiserversource \
  --namespace physics-cluster-registration \
  --mode "Resource" \
  --resource "ManagedCluster:v1" \
  --service-account physics-cr-sa \
  --sink http://cluster-registration.physics-cluster-registration.svc.cluster.local
  # or --sink ksvc:cluster-registration

or directly create the CRD if created with 003b-sink option (knative service)
oc apply -f deploy/005-apiserversource.yaml

Logic for the application

• Receive the notification event about a new cluster being registered

• Obtains the cluster name

• Deploy a specific application and service in the remote cluster

• Get the IP of the service and call the RF with the cluster name and the service IP

Create a container from the application at cluster-registration folder

To build the a new image of the sink application, just run:

$ docker build -t quay.io/myuser/cluster-registration:latest -f Dockerfile .

Push the image to your registry

$ docker login -u myuser quay.io
$ docker push quay.io/myuser/cluster-registration:latest