Fix incorrect ERROR status with IPv6 UDP members

Some IPv6 UDP members were incorrectly marked in ERROR status because of
a formatting issue between the keepalived configuration file and the
ipvsadm output. Both are used to compute the state of the members and
when a member's address contained '*:0:*', parsing was incorrect. Now
the health message generation function uses only the compressed IPv6
notation instead of mixing notations.

Story: 2008604
Task: 41783

Change-Id: I2fe94cd4c000f143c59c69e82d03c690acf5e0c3
(cherry picked from commit e5f9f6708c70313bd7e0c570f3541c0afb7fc09c)

octavia/amphorae/backends/utils/keepalivedlvs_query.py

@@ -206,19 +206,20 @@ def get_udp_listener_resource_ipports_nsname(listener_id):
         if rs_ip_port_list:
             rs_ip_port_count = len(rs_ip_port_list)
             for index in range(rs_ip_port_count):
-                if ipaddress.ip_address(
-                        rs_ip_port_list[index][0]).version == 6:
+                member_ip = ipaddress.ip_address(
+                    rs_ip_port_list[index][0])
+                if member_ip.version == 6:
                     rs_ip_port_list[index] = (
-                        '[' + rs_ip_port_list[index][0] + ']',
+                        '[' + member_ip.compressed + ']',
                         rs_ip_port_list[index][1])
                 resource_ipport_mapping['Members'][index]['ipport'] = (
                     rs_ip_port_list[index][0] + ':' +
                     rs_ip_port_list[index][1])
 
-        if ipaddress.ip_address(
-                listener_ip_port[0]).version == 6:
+        listener_ip = ipaddress.ip_address(listener_ip_port[0])
+        if listener_ip.version == 6:
             listener_ip_port = (
-                '[' + listener_ip_port[0] + ']', listener_ip_port[1])
+                '[' + listener_ip.compressed + ']', listener_ip_port[1])
         resource_ipport_mapping['Listener']['ipport'] = (
             listener_ip_port[0] + ':' + listener_ip_port[1])
 

octavia/tests/unit/amphorae/backends/utils/test_keepalivedlvs_query.py

@@ -48,6 +48,8 @@ KERNAL_FILE_SAMPLE_V6 = (
     "  -> [fd79:35e2:9963:0000:f816:3eff:feca:b7bf]:08AE      "
     "Masq    3      0          0\n"
     "  -> [fd79:35e2:9963:0000:f816:3eff:fe9d:94df]:0D05      "
+    "Masq    2      0          0\n"
+    "  -> [fd79:35e2::8f3f]:115C       "
     "Masq    2      0          0")
 
 CFG_FILE_TEMPLATE_v4 = (
@@ -124,6 +126,14 @@ CFG_FILE_TEMPLATE_v6 = (
     "        }\n\n"
     "    }\n\n"
     "    # Member %(member_id4)s is disabled\n\n"
+    "    # Configuration for Member %(member_id5)s\n"
+    "    real_server fd79:35e2:0:0:0:0:0:8f3f 4444 {\n"
+    "        weight 2\n"
+    "        MISC_CHECK {\n\n"
+    "            misc_path \"/usr/bin/check_script.sh\"\n\n"
+    "            misc_timeout 5\n\n"
+    "        }\n\n"
+    "    }\n\n"
     "}")
 
 CFG_FILE_TEMPLATE_DISABLED_LISTENER = (
@@ -167,6 +177,7 @@ class LvsQueryTestCase(base.TestCase):
         self.member_id2_v6 = uuidutils.generate_uuid()
         self.member_id3_v6 = uuidutils.generate_uuid()
         self.member_id4_v6 = uuidutils.generate_uuid()
+        self.member_id5_v6 = uuidutils.generate_uuid()
         self.disabled_listener_id = uuidutils.generate_uuid()
         cfg_content_v4 = CFG_FILE_TEMPLATE_v4 % {
             'listener_id': self.listener_id_v4,
@@ -184,7 +195,8 @@ class LvsQueryTestCase(base.TestCase):
             'member_id1': self.member_id1_v6,
             'member_id2': self.member_id2_v6,
             'member_id3': self.member_id3_v6,
-            'member_id4': self.member_id4_v6
+            'member_id4': self.member_id4_v6,
+            'member_id5': self.member_id5_v6
         }
         cfg_content_disabled_listener = (
             CFG_FILE_TEMPLATE_DISABLED_LISTENER % {
@@ -234,6 +246,12 @@ class LvsQueryTestCase(base.TestCase):
                      'ActiveConn': '0',
                      'InActConn': '0'},
                     '[fd79:35e2:9963:0:f816:3eff:fe9d:94df]:3333':
+                        {'status': constants.UP,
+                         'Forward': 'Masq',
+                         'Weight': '2',
+                         'ActiveConn': '0',
+                         'InActConn': '0'},
+                    '[fd79:35e2::8f3f]:4444':
                         {'status': constants.UP,
                          'Forward': 'Masq',
                          'Weight': '2',
@@ -289,6 +307,8 @@ class LvsQueryTestCase(base.TestCase):
                  'ipport': '[fd79:35e2:9963:0:f816:3eff:fe9d:94df]:3333'},
                 {'id': self.member_id3_v6,
                  'ipport': '[fd79:35e2:9963:0:f816:3eff:fe9d:8f3f]:4444'},
+                {'id': self.member_id5_v6,
+                 'ipport': '[fd79:35e2::8f3f]:4444'},
                 {'id': self.member_id4_v6,
                  'ipport': None}]}
         self.assertEqual((expected, constants.AMPHORA_NAMESPACE), res)
@@ -334,7 +354,8 @@ class LvsQueryTestCase(base.TestCase):
              'members': {self.member_id1_v6: constants.UP,
                          self.member_id2_v6: constants.UP,
                          self.member_id3_v6: constants.DOWN,
-                         self.member_id4_v6: constants.MAINT}}}
+                         self.member_id4_v6: constants.MAINT,
+                         self.member_id5_v6: constants.UP}}}
         self.assertEqual(expected, res)
 
     @mock.patch('os.stat')

releasenotes/notes/fix-ipv6-udp-health-message-ed94b35bbea396ec.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Some IPv6 UDP members were incorrectly marked in ERROR status, because of
+    a formatting issue while generating the health message in the amphora.