Enable cluster support for mariadb and cassandra

Added cluster detail overview for mysql compatible clusters and
cassandra clusters.

Added mariabdb and cassandra to the list of cluster datastores and
grow/shrink capable datastores.

Clean up some code that was duplicated in many places.

Change-Id: I395184554c749ad1584f57fa9480c1353e6a6d38
Closes-Bug: #1551906

releasenotes/notes/enable-cluster-mariabdb-cassandra-11f3f7f6badfc211.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Enable cluster support for MariaDB and Cassandra.

trove_dashboard/content/database_clusters/tabs.py

@@ -22,6 +22,7 @@ from horizon import tabs
 
 from trove_dashboard import api
 from trove_dashboard.content.database_clusters import tables
+from trove_dashboard.content.databases import db_capability
 
 
 class OverviewTab(tabs.Tab):
@@ -34,7 +35,7 @@ class OverviewTab(tabs.Tab):
     def get_template_name(self, request):
         cluster = self.tab_group.kwargs['cluster']
         template_file = ('project/database_clusters/_detail_overview_%s.html'
-                         % cluster.datastore['type'])
+                         % self._get_template_type(cluster.datastore['type']))
         try:
             template.loader.get_template(template_file)
             return template_file
@@ -43,6 +44,12 @@ class OverviewTab(tabs.Tab):
             # Just use the base template file
             return ('project/database_clusters/_detail_overview.html')
 
+    def _get_template_type(self, datastore):
+        if db_capability.is_mysql_compatible(datastore):
+            return 'mysql'
+
+        return datastore
+
 
 class InstancesTab(tabs.TableTab):
     table_classes = (tables.InstancesTable,)

trove_dashboard/content/database_clusters/templates/database_clusters/_detail_overview_cassandra.html

@@ -0,0 +1,19 @@
+{% extends "project/database_clusters/_detail_overview.html" %}
+{% load i18n sizeformat %}
+
+{% block connection_info %}
+    <h4>{% trans "Connection Information" %}</h4>
+    <hr class="header_rule">
+    <dl class="dl-horizontal">
+        {% with cluster.ip.0 as ip %}
+            <dt>{% trans "Host" %}</dt>
+            {% if not ip %}
+                <dd>{% trans "Not Assigned" %}</dd>
+            {% else %}
+                <dd>{{ ip }}</dd>
+                <dt>{% trans "Connection Examples" %}</dt>
+                <dd>cqlsh {{ ip }} 9042</dd>
+            {% endif %}
+        {% endwith %}
+    </dl>
+{% endblock %}

trove_dashboard/content/database_clusters/templates/database_clusters/_detail_overview_mysql.html

@@ -0,0 +1,19 @@
+{% extends "project/database_clusters/_detail_overview.html" %}
+{% load i18n sizeformat %}
+
+{% block connection_info %}
+    <h4>{% trans "Connection Information" %}</h4>
+    <hr class="header_rule">
+    <dl class="dl-horizontal">
+        {% with cluster.ip.0 as ip %}
+            <dt>{% trans "Host" %}</dt>
+            {% if not ip %}
+                <dd>{% trans "Not Assigned" %}</dd>
+            {% else %}
+                <dd>{{ ip }}</dd>
+                <dt>{% trans "Connection Examples" %}</dt>
+                <dd>mysql {{ ip }} 3306</dd>
+            {% endif %}
+        {% endwith %}
+    </dl>
+{% endblock %}

trove_dashboard/content/databases/db_capability.py

@@ -13,6 +13,7 @@
 #    under the License.
 
 
+CASSANDRA = "cassandra"
 MARIA = "maria"
 MONGODB = "mongodb"
 MYSQL = "mysql"
@@ -21,12 +22,15 @@ PERCONA_CLUSTER = "pxc"
 REDIS = "redis"
 VERTICA = "vertica"
 
-_mysql_compatible_datastores = (MYSQL, MARIA, PERCONA)
+_mysql_compatible_datastores = (MYSQL, MARIA, PERCONA, PERCONA_CLUSTER)
-_cluster_capable_datastores = (MONGODB, PERCONA_CLUSTER, REDIS, VERTICA)
+_cluster_capable_datastores = (CASSANDRA, MARIA, MONGODB, PERCONA_CLUSTER,
+                               REDIS, VERTICA)
+_cluster_grow_shrink_capable_datastores = (CASSANDRA, MARIA, MONGODB, REDIS)
 
 
 def can_modify_cluster(datastore):
-    return (is_mongodb_datastore(datastore) or is_redis_datastore(datastore))
+    return _is_datastore_in_list(datastore,
+                                 _cluster_grow_shrink_capable_datastores)
 
 
 def is_mongodb_datastore(datastore):
@@ -46,17 +50,17 @@ def is_vertica_datastore(datastore):
 
 
 def is_mysql_compatible(datastore):
-    if (datastore is not None):
+    return _is_datastore_in_list(datastore, _mysql_compatible_datastores)
-        for ds in _mysql_compatible_datastores:
-            if ds in datastore.lower():
-                return True
-    return False
 
 
 def is_cluster_capable_datastore(datastore):
+    return _is_datastore_in_list(datastore, _cluster_capable_datastores)
+
+
+def _is_datastore_in_list(datastore, datastores):
     if datastore is not None:
         datastore_lower = datastore.lower()
-        for ds in _cluster_capable_datastores:
+        for ds in datastores:
             if ds in datastore_lower:
                 return True
     return False