Use SSL compatible service status check

Override the layer_ovn method used to check if services
are running so that we can use SSL connections instead
of netcat since the latter causes problems with
ovsdb-server due to connections not being closed
properly.

Closes-Bug: #1920770
Change-Id: I6b2c09c643c6fddfb48dc15d6272e58303fae265
(cherry picked from commit fafa6d418a)
(cherry picked from commit 05722e0fbc)
(cherry picked from commit 0a7904fba2)
(cherry picked from commit 202684c9f7)

src/build.lock

@@ -171,7 +171,7 @@
       "package": "charmhelpers",
       "url": "git+https://github.com/juju/charm-helpers.git",
       "branch": "refs/heads/stable/yoga",
-      "version": "971ac5117c96bd1cb4a6a520787e4509564da582",
+      "version": "e9dfd069b1ff29d39a3f06829f299709f102d887",
       "vcs": "git"
     },
     {

src/lib/charm/openstack/ovn_central.py

@@ -25,7 +25,10 @@ import charmhelpers.contrib.network.ovs.ovn as ch_ovn
 import charmhelpers.contrib.network.ovs.ovsdb as ch_ovsdb
 from charmhelpers.contrib.network import ufw as ch_ufw
 import charmhelpers.contrib.openstack.deferred_events as deferred_events
+import charmhelpers.contrib.hahelpers.cluster as ch_cluster
+import charmhelpers.contrib.openstack.utils as os_utils
 import charmhelpers.fetch as ch_fetch
+from charmhelpers.contrib.network.ip import SSLPortCheckInfo
 
 import charms.reactive as reactive
 
@@ -361,6 +364,27 @@ class BaseOVNCentralCharm(charms_openstack.charm.OpenStackCharm):
                 .format(self.min_election_timer, self.max_election_timer))
         return None, None
 
+    def check_services_running(self):
+        """
+        The default charms.openstack/layer_openstack handler will use netcat to
+        check if services are running. This causes the ovsdb-server logs to
+        get spammed with SSL protocol errors and warnings because netcat does
+        not close the connection properly. We override this method to request
+        that services be tested using SSL connections.
+        """
+        _services, _ports = ch_cluster.get_managed_services_and_ports(
+            self.services,
+            self.ports_to_check(self.active_api_ports))
+        ssl_info = SSLPortCheckInfo(os.path.join(self.ovn_sysconfdir(),
+                                                 'key_host'),
+                                    os.path.join(self.ovn_sysconfdir(),
+                                                 'cert_host'),
+                                    os.path.join(self.ovn_sysconfdir(),
+                                                 'ovn-central.crt'))
+        return os_utils.ows_check_services_running(services=_services,
+                                                   ports=_ports,
+                                                   ssl_check_info=ssl_info)
+
     def custom_assess_status_last_check(self):
         """Customize charm status output.