Add a test for subnodes

Some misc changes related to running this:
  * Set log/stdout/err capture vars as in ZUUL
  * Give the main loop a configurable sleep value so tests can run faster
  * Fix a confusing typo in the node.yaml config

Additionally, a better method for waiting for test completion is added
which permits us to use assert statements in the tests.

Change-Id: Icddd2afcd816dbd5ab955fa4ab5011ac8def8faf

.testr.conf

@@ -1,4 +1,4 @@
 [DEFAULT]
-test_command=OS_TEST_TIMEOUT=60 ${PYTHON:-python} -m subunit.run discover -t ./ nodepool/tests/ $LISTOPT $IDOPTION
+test_command=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} OS_LOG_CAPTURE=${OS_LOG_CAPTURE:-1} OS_TEST_TIMEOUT=60 ${PYTHON:-python} -m subunit.run discover -t ./ nodepool/tests/ $LISTOPT $IDOPTION
 test_id_option=--load-list $IDFILE
 test_list_option=--list

nodepool/nodepool.py

@@ -836,9 +836,10 @@ class GearmanServer(ConfigValue):
 class NodePool(threading.Thread):
     log = logging.getLogger("nodepool.NodePool")
 
-    def __init__(self, configfile):
+    def __init__(self, configfile, watermark_sleep=WATERMARK_SLEEP):
         threading.Thread.__init__(self, name='NodePool')
         self.configfile = configfile
+        self.watermark_sleep = watermark_sleep
         self._stopped = False
         self.config = None
         self.zmq_context = None
@@ -1275,7 +1276,7 @@ class NodePool(threading.Thread):
                     self._run(session)
             except Exception:
                 self.log.exception("Exception in main loop:")
-            time.sleep(WATERMARK_SLEEP)
+            time.sleep(self.watermark_sleep)
 
     def _run(self, session):
         self.checkForMissingImages(session)

nodepool/tests/__init__.py

@@ -49,8 +49,10 @@ class BaseTestCase(testtools.TestCase, testresources.ResourcedTestCase):
         if os.environ.get('OS_STDERR_CAPTURE') in TRUE_VALUES:
             stderr = self.useFixture(fixtures.StringStream('stderr')).stream
             self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))
-
-        self.useFixture(fixtures.FakeLogger(level=logging.DEBUG))
+        if os.environ.get('OS_LOG_CAPTURE') in TRUE_VALUES:
+            self.useFixture(fixtures.FakeLogger(level=logging.DEBUG))
+        else:
+            logging.basicConfig(level=logging.DEBUG)
         self.useFixture(fixtures.NestedTempfile())
 
 

nodepool/tests/fixtures/node.yaml

@@ -14,7 +14,7 @@ gearman-servers:
 
 labels:
   - name: fake-label
-    image: fake-label
+    image: fake-image
     min-ready: 1
     providers:
       - name: fake-provider
@@ -32,7 +32,7 @@ providers:
       - net-id: 'some-uuid'
     rate: 0.0001
     images:
-      - name: fake-label
+      - name: fake-image
         base-image: 'Fake Precise'
         min-ram: 8192
         name-filter: 'Fake'

nodepool/tests/fixtures/subnodes.yaml

@@ -0,0 +1,53 @@
+script-dir: .
+dburi: '{dburi}'
+
+cron:
+  check: '*/15 * * * *'
+  cleanup: '*/1 * * * *'
+  update-image: '14 2 * * *'
+
+zmq-publishers:
+  - tcp://localhost:8881
+
+gearman-servers:
+  - host: localhost
+
+labels:
+  - name: fake-label
+    image: fake-image
+    min-ready: 2
+    providers:
+      - name: fake-provider
+  - name: multi-fake
+    image: fake-image
+    ready-script: multinode_setup.sh
+    subnodes: 2
+    min-ready: 2
+    providers:
+      - name: fake-provider
+
+providers:
+  - name: fake-provider
+    keypair: 'if-present-use-this-keypair'
+    username: 'fake'
+    password: 'fake'
+    auth-url: 'fake'
+    project-id: 'fake'
+    max-servers: 96
+    pool: 'fake'
+    networks:
+      - net-id: 'some-uuid'
+    rate: 0.0001
+    images:
+      - name: fake-image
+        base-image: 'Fake Precise'
+        min-ram: 8192
+        name-filter: 'Fake'
+        setup: prepare_node_devstack.sh
+
+targets:
+  - name: fake-target
+    jenkins:
+      url: https://jenkins.example.org/
+      user: fake
+      apikey: fake

nodepool/tests/test_nodepool.py

@@ -60,22 +60,53 @@ class TestNodepool(tests.DBTestCase):
         with db.getSession() as session:
             session.getNodes()
 
-    def test_node(self):
-        """Test that an image and node are created"""
-        configfile = self.setup_config('node.yaml')
-        pool = nodepool.nodepool.NodePool(configfile)
-        pool.start()
-        time.sleep(2)
+    def waitForNodes(self, pool):
         while True:
             self.wait_for_threads()
             with pool.getDB().getSession() as session:
-                nodes = session.getNodes(provider_name='fake-provider',
-                                         label_name='fake-label',
-                                         target_name='fake-target',
-                                         state=nodedb.READY)
-                if len(nodes) == 1:
+                needed = pool.getNeededNodes(session)
+                if not needed:
                     break
-                nodes = session.getNodes()
                 time.sleep(1)
         self.wait_for_threads()
+
+    def test_node(self):
+        """Test that an image and node are created"""
+        configfile = self.setup_config('node.yaml')
+        pool = nodepool.nodepool.NodePool(configfile, watermark_sleep=0.5)
+        pool.start()
+        time.sleep(2)
+        self.waitForNodes(pool)
+
+        with pool.getDB().getSession() as session:
+            nodes = session.getNodes(provider_name='fake-provider',
+                                     label_name='fake-label',
+                                     target_name='fake-target',
+                                     state=nodedb.READY)
+            self.assertEqual(len(nodes), 1)
+        pool.stop()
+
+    def test_subnodes(self):
+        """Test that an image and node are created"""
+        configfile = self.setup_config('subnodes.yaml')
+        pool = nodepool.nodepool.NodePool(configfile, watermark_sleep=0.5)
+        pool.start()
+        time.sleep(2)
+        self.waitForNodes(pool)
+
+        with pool.getDB().getSession() as session:
+            nodes = session.getNodes(provider_name='fake-provider',
+                                     label_name='fake-label',
+                                     target_name='fake-target',
+                                     state=nodedb.READY)
+            self.assertEqual(len(nodes), 2)
+            nodes = session.getNodes(provider_name='fake-provider',
+                                     label_name='multi-fake',
+                                     target_name='fake-target',
+                                     state=nodedb.READY)
+            self.assertEqual(len(nodes), 2)
+            for node in nodes:
+                self.assertEqual(len(node.subnodes), 2)
+                for subnode in node.subnodes:
+                    self.assertEqual(subnode.state, nodedb.READY)
         pool.stop()