Feature/cpu autoscaling

[vitorguidi]

Motivation

Placeholder PR so I can iterate with @cezarguimaraes

Caveats

cass-operator depends on go/v4-alpha, so we need to use operator sdk 1.32

Setting up boilerplate

operator-sdk create api --group cassandra.datastax.com --version v1beta1 --kind CassandraDataCenterAutoscaler --resource --controller

this creates things on places different than the standard project structure for this repo, but does not matter for now. will fix iff the community is interested in the feature, for now it is just an exercise

Testing

Comment out webhook setup with manager in cmd/main.go

/*
		if !operConfig.DisableWebhooks {
			if err = (&api.CassandraDatacenter{}).SetupWebhookWithManager(mgr); err != nil {
				setupLog.Error(err, "unable to create webhook", "webhook", "CassandraDatacenter")
				os.Exit(1)
			}
		}
	*/

make generate
make install
make run
k apply -f config/samples/cassandra.datastax.com_v1beta1_cassandradatacenterautoscaler.yaml

if all goes well, we should see the logs in the operator when the reconcile happens:

2024-01-14T14:03:46.449-0300    INFO    Bem vindo ao maravilhoso mundo de autoscaling. Recebi o evento do recurso %s    {"controller": "cassandradatacenterautoscaler", "controllerGroup": "cassandra.datastax.com.cassandra.datastax.com", "controllerKind": "CassandraDataCenterAutoscaler", "CassandraDataCenterAutoscaler": {"name":"cassandradatacenterautoscaler-sample","namespace":"cassandra"}, "namespace": "cassandra", "name": "cassandradatacenterautoscaler-sample", "reconcileID": "8caf7afd-6c72-4d36-8ff3-6430ab443ed1", "resource name": {"namespace": "cassandra", "name": "cassandradatacenterautoscaler-sample"}}
2024-01-14T14:03:46.449-0300    INFO    Datacenter Ref = cassandra      {"controller": "cassandradatacenterautoscaler", "controllerGroup": "cassandra.datastax.com.cassandra.datastax.com", "controllerKind": "CassandraDataCenterAutoscaler", "CassandraDataCenterAutoscaler": {"name":"cassandradatacenterautoscaler-sample","namespace":"cassandra"}, "namespace": "cassandra", "name": "cassandradatacenterautoscaler-sample", "reconcileID": "8caf7afd-6c72-4d36-8ff3-6430ab443ed1"}