Add hypervisor_hostname to compute_nodes table and use it in XenServer.

This ensures the dom0 hostname is available to the API even when dom0 is "offline."

Change-Id: I1230c1871606fadc30f63ed97b56d54e51fd8833

1 files changed, 18 insertions, 1 deletions

diff --git a/nova/virt/xenapi_conn.py b/nova/virt/xenapi_conn.py
index 85e94c4316..6fae558b5d 100644
--- a/nova/virt/xenapi_conn.py
+++ b/nova/virt/xenapi_conn.py
@@ -181,6 +181,8 @@ class XenAPIConnection(driver.ComputeDriver):
         self._initiator = None
         self._pool = pool.ResourcePool(self._session)
 
+        self._capture_dom0_hostname()
+
     @property
     def host_state(self):
         if not self._host_state:
@@ -194,6 +196,22 @@ class XenAPIConnection(driver.ComputeDriver):
         #e.g. to do session logout?
         pass
 
+    def _capture_dom0_hostname(self):
+        """Find dom0's hostname and log it to the DB."""
+        ctxt = context.get_admin_context()
+        service = db.service_get_by_host_and_topic(ctxt, FLAGS.host, "compute")
+
+        try:
+            compute_node = db.compute_node_get_for_service(ctxt, service["id"])
+        except TypeError:
+            return
+
+        host_stats = self.get_host_stats()
+
+        db.compute_node_update(ctxt, compute_node["id"],
+                {"hypervisor_hostname": host_stats["host_hostname"]},
+                auto_adjust=False)
+
     def list_instances(self):
         """List VM instances"""
         return self._vmops.list_instances()
@@ -390,7 +408,6 @@ class XenAPIConnection(driver.ComputeDriver):
         :param host: hostname that compute manager is currently running
 
         """
-
         try:
             service_ref = db.service_get_all_compute_by_host(ctxt, host)[0]
         except exception.NotFound: