web: add /{tenant}/nodes route

This change adds a /nodes route to return the nodes status.

Change-Id: I81b495d29659f9a130c75f4c3f32cfd0f47ef15f

tests/unit/test_web.py

@@ -372,6 +372,13 @@ class TestWeb(BaseTestWeb):
                 'voting': True
             }], data)
 
+    def test_web_nodes_list(self):
+        # can we fetch the nodes list
+        data = self.get_url('api/tenant/tenant-one/nodes').json()
+        self.assertGreater(len(data), 0)
+        self.assertEqual("test-provider", data[0]["provider"])
+        self.assertEqual("label1", data[0]["type"])
+
     def test_web_labels_list(self):
         # can we fetch the labels list
         data = self.get_url('api/tenant/tenant-one/labels').json()

zuul/web/__init__.py

@@ -356,6 +356,21 @@ class ZuulWebAPI(object):
         resp.headers['Access-Control-Allow-Origin'] = '*'
         return ret
 
+    @cherrypy.expose
+    @cherrypy.tools.save_params()
+    @cherrypy.tools.json_out(content_type='application/json; charset=utf-8')
+    def nodes(self, tenant):
+        ret = []
+        for node in self.zk.nodeIterator():
+            node_data = {}
+            for key in ("id", "type", "connection_type", "external_id",
+                        "provider", "state", "state_time", "comment"):
+                node_data[key] = node.get(key)
+            ret.append(node_data)
+        resp = cherrypy.response
+        resp.headers['Access-Control-Allow-Origin'] = '*'
+        return ret
+
     @cherrypy.expose
     @cherrypy.tools.save_params()
     def key(self, tenant, project):
@@ -594,6 +609,8 @@ class ZuulWeb(object):
                           controller=api, action='pipelines')
         route_map.connect('api', '/api/tenant/{tenant}/labels',
                           controller=api, action='labels')
+        route_map.connect('api', '/api/tenant/{tenant}/nodes',
+                          controller=api, action='nodes')
         route_map.connect('api', '/api/tenant/{tenant}/key/{project:.*}.pub',
                           controller=api, action='key')
         route_map.connect('api', '/api/tenant/{tenant}/'

zuul/zk.py

@@ -294,6 +294,7 @@ class ZooKeeper(object):
         return count
 
     # Copy of nodepool/zk.py begins here
+    NODE_ROOT = "/nodepool/nodes"
     LAUNCHER_ROOT = "/nodepool/launchers"
 
     def _bytesToDict(self, data):
@@ -302,6 +303,9 @@ class ZooKeeper(object):
     def _launcherPath(self, launcher):
         return "%s/%s" % (self.LAUNCHER_ROOT, launcher)
 
+    def _nodePath(self, node):
+        return "%s/%s" % (self.NODE_ROOT, node)
+
     def getRegisteredLaunchers(self):
         '''
         Get a list of all launchers that have registered with ZooKeeper.
@@ -325,6 +329,46 @@ class ZooKeeper(object):
             objs.append(Launcher.fromDict(self._bytesToDict(data)))
         return objs
 
+    def getNodes(self):
+        '''
+        Get the current list of all nodes.
+
+        :returns: A list of nodes.
+        '''
+        try:
+            return self.client.get_children(self.NODE_ROOT)
+        except kze.NoNodeError:
+            return []
+
+    def getNode(self, node):
+        '''
+        Get the data for a specific node.
+
+        :param str node: The node ID.
+
+        :returns: The node data, or None if the node was not found.
+        '''
+        path = self._nodePath(node)
+        try:
+            data, stat = self.client.get(path)
+        except kze.NoNodeError:
+            return None
+        if not data:
+            return None
+
+        d = self._bytesToDict(data)
+        d['id'] = node
+        return d
+
+    def nodeIterator(self):
+        '''
+        Utility generator method for iterating through all nodes.
+        '''
+        for node_id in self.getNodes():
+            node = self.getNode(node_id)
+            if node:
+                yield node
+
 
 class Launcher():
     '''