feat: add cassandradatacenter healthcheck

resource_customizations/cassandra.datastax.com/CassandraDatacenter/health.lua

@@ -0,0 +1,28 @@
+local hs = {}
+
+local amountOfNodes = 0
+if obj.status ~= nil and obj.status.nodeStatuses ~= nil then
+	for _, _ in pairs(obj.status.nodeStatuses) do
+		amountOfNodes = amountOfNodes + 1
+	end
+else
+	hs.status = "Degraded"
+	hs.message = "No nodeStatus in object's status"
+	return hs
+end
+
+if obj.spec ~= nil and obj.spec.size ~= nil then
+	if obj.spec.size == amountOfNodes then
+		hs.status = "Healthy"
+		return hs
+	else
+		hs.status = "Degraded"
+		hs.message = "Size in spec and number of nodes in status differ"
+	end
+else
+	hs.status = "Degraded"
+	hs.message = "No size in object's spec"
+	return hs
+end
+
+return hs

resource_customizations/cassandra.datastax.com/CassandraDatacenter/health_test.yaml

@@ -0,0 +1,8 @@
+tests:
+- healthStatus:
+    status: Healthy
+  inputPath: testdata/datacenter-ok.yaml
+- healthStatus:
+    status: Degraded
+    message: "Size in spec and number of nodes in status differ"
+  inputPath: testdata/datacenter-missing-nodestatus.yaml

resource_customizations/cassandra.datastax.com/CassandraDatacenter/testdata/datacenter-missing-nodestatus.yaml

@@ -0,0 +1,14 @@
+apiVersion: cassandra.datastax.com/v1beta1
+kind: CassandraDatacenter
+spec:
+  size: 3
+status:
+  nodeStatuses:
+    dti6001dbv-cluster-stage0-dti6001dbv-default-sts-0:
+      hostID: testID1
+      ip: 10.42.2.219
+      rack: default
+    dti6001dbv-cluster-stage0-dti6001dbv-default-sts-1:
+      hostID: testID2
+      ip: 10.42.5.37
+      rack: default

resource_customizations/cassandra.datastax.com/CassandraDatacenter/testdata/datacenter-ok.yaml

@@ -0,0 +1,19 @@
+apiVersion: cassandra.datastax.com/v1beta1
+kind: CassandraDatacenter
+spec:
+  size: 3
+status:
+  nodeStatuses:
+    dti6001dbv-cluster-stage0-dti6001dbv-default-sts-0:
+      hostID: testID1
+      ip: 10.42.2.219
+      rack: default
+    dti6001dbv-cluster-stage0-dti6001dbv-default-sts-1:
+      hostID: testID2
+      ip: 10.42.5.37
+      rack: default
+    dti6001dbv-cluster-stage0-dti6001dbv-default-sts-2:
+      hostID: testID3
+      ip: 10.42.4.198
+      rack: default
+