Add test case for calico using etcd datastore (#10722)

* Add multinode ci layout

* Add test case for calico using etcd datastore

tests/cloud_playbooks/roles/packet-ci/templates/inventory.j2

@@ -81,6 +81,16 @@ instance-2
 [broken_etcd]
 instance-1 etcd_member_name=etcd2
 instance-2 etcd_member_name=etcd3
+{% elif mode == "multinode" %}
+[kube_control_plane]
+instance-1
+
+[etcd]
+instance-1
+
+[kube_node]
+instance-2
+instance-3
 {% endif %}
 
 [k8s_cluster:children]

tests/cloud_playbooks/roles/packet-ci/vars/main.yml

@@ -7,6 +7,7 @@ _vm_count_dict:
   ha-recover: 3
   ha-recover-noquorum: 3
   all-in-one: 1
+  multinode: 3
   default: 2
 
 vm_count: "{{ _vm_count_dict[mode | d('default')] }}"