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[Bug 1845330] [NEW] neutron-tempest-plugin API test for list agents failure

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Slawek Kaplonski <1845330@xxxxxxxxxxxxxxxxxx>
Date: Wed, 25 Sep 2019 13:44:46 -0000
Reply-to: Bug 1845330 <1845330@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

I saw in d/s ci that it may happend in some cases that test
neutron_tempest_plugin.api.admin.test_agent_management.AgentManagementTestJSON.test_list_agent
may fails if e.g. in another test, like test_update_agent_description
modifies same agent which is assigned to be "non modfied" agent.

Example of failure:

testtools.testresult.real._StringException: pythonlogging:'': {{{
2019-09-24 17:19:37,952 291890 INFO     [tempest.lib.common.rest_client] Request (AgentManagementTestJSON:test_list_agent): 200 GET http://10.0.0.148:9696/v2.0/agents 0.594s
2019-09-24 17:19:37,953 291890 DEBUG    [tempest.lib.common.rest_client] Request - Headers: {'Content-Type': 'application/json', 'Accept': 'application/json', 'X-Auth-Token': '<omitted>'}
        Body: None
    Response - Headers: {'content-type': 'application/json', 'content-length': '11713', 'x-openstack-request-id': 'req-698a3a9e-4abe-4453-bb61-7d348032d734', 'date': 'Tue, 24 Sep 2019 17:19:37 GMT', 'connection': 'close', 'status': '200', 'content-location': 'http://10.0.0.148:9696/v2.0/agents'}
        Body: b'{"agents": [{"id": "29cbb538-fc95-4ec9-9d7d-5028a6ed7d82", "agent_type": "L3 agent", "binary": "neutron-l3-agent", "topic": "l3_agent", "host": "controller-0.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:20", "started_at": "2019-09-24 16:46:20", "heartbeat_timestamp": "2019-09-24 17:19:20", "description": "description for update agent.", "resources_synced": null, "availability_zone": "nova", "alive": true, "configurations": {"agent_mode": "legacy", "ex_gw_ports": 0, "floating_ips": 0, "gateway_external_network_id": "", "handle_internal_only_routers": true, "interface_driver": "neutron.agent.linux.interface.OVSInterfaceDriver", "interfaces": 0, "log_agent_heartbeats": false, "routers": 0}}, {"id": "2c347a90-f262-47a2-b980-bab1aa1fb294", "agent_type": "DHCP agent", "binary": "neutron-dhcp-agent", "topic": "dhcp_agent", "host": "controller-1.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:16", "started_at": "2019-09-24 16:46:16", "heartbeat_timestamp": "2019-09-24 17:19:16", "description": null, "resources_synced": null, "availability_zone": "nova", "alive": true, "configurations": {"dhcp_driver": "neutron.agent.linux.dhcp.Dnsmasq", "dhcp_lease_duration": 86400, "log_agent_heartbeats": false, "networks": 0, "ports": 0, "subnets": 0}}, {"id": "41032db3-4508-4f93-b840-e9ca38f22479", "agent_type": "DHCP agent", "binary": "neutron-dhcp-agent", "topic": "dhcp_agent", "host": "controller-0.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:17", "started_at": "2019-09-24 16:46:17", "heartbeat_timestamp": "2019-09-24 17:19:17", "description": null, "resources_synced": null, "availability_zone": "nova", "alive": true, "configurations": {"dhcp_driver": "neutron.agent.linux.dhcp.Dnsmasq", "dhcp_lease_duration": 86400, "log_agent_heartbeats": false, "networks": 0, "ports": 0, "subnets": 0}}, {"id": "45d76247-ec5e-439d-b966-3045087e35e0", "agent_type": "Open vSwitch agent", "binary": "neutron-openvswitch-agent", "topic": "N/A", "host": "compute-0.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:30", "started_at": "2019-09-24 16:47:00", "heartbeat_timestamp": "2019-09-24 17:19:30", "description": null, "resources_synced": null, "availability_zone": null, "alive": true, "configurations": {"arp_responder_enabled": false, "bridge_mappings": {"datacentre": "br-ex", "tenant": "br-isolated"}, "datapath_type": "system", "devices": 0, "enable_distributed_routing": false, "extensions": ["qos"], "in_distributed_mode": false, "integration_bridge": "br-int", "l2_population": false, "log_agent_heartbeats": false, "ovs_capabilities": {"datapath_types": ["netdev", "system"], "iface_types": ["erspan", "geneve", "gre", "internal", "ip6erspan", "ip6gre", "lisp", "patch", "stt", "system", "tap", "vxlan"]}, "ovs_hybrid_plug": true, "resource_provider_bandwidths": {}, "resource_provider_inventory_defaults": {"allocation_ratio": 1.0, "min_unit": 1, "step_size": 1, "reserved": 0}, "tunnel_types": ["vxlan"], "tunneling_ip": "172.17.2.131", "vhostuser_socket_dir": "/var/run/openvswitch"}}, {"id": "5555b04e-ea86-498e-8c93-a83553e52bf1", "agent_type": "Metadata agent", "binary": "neutron-metadata-agent", "topic": "N/A", "host": "controller-0.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:23", "started_at": "2019-09-24 16:46:23", "heartbeat_timestamp": "2019-09-24 17:19:23", "description": null, "resources_synced": null, "availability_zone": null, "alive": true, "configurations": {"log_agent_heartbeats": false, "metadata_proxy_socket": "/var/lib/neutron/metadata_proxy", "nova_metadata_host": "overcloud.internalapi.localdomain", "nova_metadata_port": 8775}}, {"id": "948d978a-4df1-4de9-82aa-0ba2cc4a0da9", "agent_type": "Open vSwitch agent", "binary": "neutron-openvswitch-agent", "topic": "N/A", "host": "controller-1.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:32", "started_at": "2019-09-24 16:47:02", "heartbeat_timestamp": "2019-09-24 17:19:32", "description": null, "resources_synced": null, "availability_zone": null, "alive":
}}}

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/neutron_tempest_plugin/api/admin/test_agent_management.py", line 42, in test_list_agent
    self.assertIn(self.agent, agents)
  File "/usr/lib/python3.6/site-packages/testtools/testcase.py", line 417, in assertIn
    self.assertThat(haystack, Contains(needle), message)
  File "/usr/lib/python3.6/site-packages/testtools/testcase.py", line 498, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: {'id': '29cbb538-fc95-4ec9-9d7d-5028a6ed7d82', 'agent_type': 'L3 agent', 'binary': 'neutron-l3-agent', 'topic': 'l3_agent', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:20', 'started_at': '2019-09-24 16:46:20', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True} not in [{'id': '29cbb538-fc95-4ec9-9d7d-5028a6ed7d82', 'agent_type': 'L3 agent', 'binary': 'neutron-l3-agent', 'topic': 'l3_agent', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:20', 'started_at': '2019-09-24 16:46:20', 'description': 'description for update agent.', 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': '2c347a90-f262-47a2-b980-bab1aa1fb294', 'agent_type': 'DHCP agent', 'binary': 'neutron-dhcp-agent', 'topic': 'dhcp_agent', 'host': 'controller-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:16', 'started_at': '2019-09-24 16:46:16', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': '41032db3-4508-4f93-b840-e9ca38f22479', 'agent_type': 'DHCP agent', 'binary': 'neutron-dhcp-agent', 'topic': 'dhcp_agent', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:17', 'started_at': '2019-09-24 16:46:17', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': '45d76247-ec5e-439d-b966-3045087e35e0', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'compute-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:30', 'started_at': '2019-09-24 16:47:00', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': '5555b04e-ea86-498e-8c93-a83553e52bf1', 'agent_type': 'Metadata agent', 'binary': 'neutron-metadata-agent', 'topic': 'N/A', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:23', 'started_at': '2019-09-24 16:46:23', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': '948d978a-4df1-4de9-82aa-0ba2cc4a0da9', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'controller-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:32', 'started_at': '2019-09-24 16:47:02', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'a11efdd7-83ce-4449-8fd4-fbf11ed86ecc', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:33', 'started_at': '2019-09-24 16:47:03', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'aacd3aee-caf6-403e-8890-5fce6867ce24', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'controller-2.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:32', 'started_at': '2019-09-24 16:47:02', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'c940f293-0e33-4586-bfce-4caba48560a4', 'agent_type': 'Metadata agent', 'binary': 'neutron-metadata-agent', 'topic': 'N/A', 'host': 'controller-2.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:23', 'started_at': '2019-09-24 16:46:23', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'cfce4183-5ff5-49a2-9957-54434b218afd', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'compute-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:29', 'started_at': '2019-09-24 16:46:59', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'd8c1b0b7-a84d-48b3-be24-184c44c2123a', 'agent_type': 'DHCP agent', 'binary': 'neutron-dhcp-agent', 'topic': 'dhcp_agent', 'host': 'controller-2.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:17', 'started_at': '2019-09-24 16:46:17', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': 'dae0d572-2edb-4d39-9e7a-43206c0d234d', 'agent_type': 'L3 agent', 'binary': 'neutron-l3-agent', 'topic': 'l3_agent', 'host': 'controller-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:20', 'started_at': '2019-09-24 16:46:20', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': 'daf0c85a-1472-4dfb-816b-7aad7ee70a8b', 'agent_type': 'L3 agent', 'binary': 'neutron-l3-agent', 'topic': 'l3_agent', 'host': 'controller-2.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:20', 'started_at': '2019-09-24 16:46:20', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': 'e7651528-ed52-489e-9e58-31105aad469c', 'agent_type': 'Metadata agent', 'binary': 'neutron-metadata-agent', 'topic': 'N/A', 'host': 'controller-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:22', 'started_at': '2019-09-24 16:46:22', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}]

** Affects: neutron
     Importance: Low
     Assignee: Slawek Kaplonski (slaweq)
         Status: Confirmed

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https://bugs.launchpad.net/bugs/1845330

Title:
  neutron-tempest-plugin API test for list agents failure

Status in neutron:
  Confirmed

Bug description:
  I saw in d/s ci that it may happend in some cases that test
  neutron_tempest_plugin.api.admin.test_agent_management.AgentManagementTestJSON.test_list_agent
  may fails if e.g. in another test, like test_update_agent_description
  modifies same agent which is assigned to be "non modfied" agent.

  Example of failure:

  testtools.testresult.real._StringException: pythonlogging:'': {{{
  2019-09-24 17:19:37,952 291890 INFO     [tempest.lib.common.rest_client] Request (AgentManagementTestJSON:test_list_agent): 200 GET http://10.0.0.148:9696/v2.0/agents 0.594s
  2019-09-24 17:19:37,953 291890 DEBUG    [tempest.lib.common.rest_client] Request - Headers: {'Content-Type': 'application/json', 'Accept': 'application/json', 'X-Auth-Token': '<omitted>'}
          Body: None
      Response - Headers: {'content-type': 'application/json', 'content-length': '11713', 'x-openstack-request-id': 'req-698a3a9e-4abe-4453-bb61-7d348032d734', 'date': 'Tue, 24 Sep 2019 17:19:37 GMT', 'connection': 'close', 'status': '200', 'content-location': 'http://10.0.0.148:9696/v2.0/agents'}
          Body: b'{"agents": [{"id": "29cbb538-fc95-4ec9-9d7d-5028a6ed7d82", "agent_type": "L3 agent", "binary": "neutron-l3-agent", "topic": "l3_agent", "host": "controller-0.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:20", "started_at": "2019-09-24 16:46:20", "heartbeat_timestamp": "2019-09-24 17:19:20", "description": "description for update agent.", "resources_synced": null, "availability_zone": "nova", "alive": true, "configurations": {"agent_mode": "legacy", "ex_gw_ports": 0, "floating_ips": 0, "gateway_external_network_id": "", "handle_internal_only_routers": true, "interface_driver": "neutron.agent.linux.interface.OVSInterfaceDriver", "interfaces": 0, "log_agent_heartbeats": false, "routers": 0}}, {"id": "2c347a90-f262-47a2-b980-bab1aa1fb294", "agent_type": "DHCP agent", "binary": "neutron-dhcp-agent", "topic": "dhcp_agent", "host": "controller-1.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:16", "started_at": "2019-09-24 16:46:16", "heartbeat_timestamp": "2019-09-24 17:19:16", "description": null, "resources_synced": null, "availability_zone": "nova", "alive": true, "configurations": {"dhcp_driver": "neutron.agent.linux.dhcp.Dnsmasq", "dhcp_lease_duration": 86400, "log_agent_heartbeats": false, "networks": 0, "ports": 0, "subnets": 0}}, {"id": "41032db3-4508-4f93-b840-e9ca38f22479", "agent_type": "DHCP agent", "binary": "neutron-dhcp-agent", "topic": "dhcp_agent", "host": "controller-0.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:17", "started_at": "2019-09-24 16:46:17", "heartbeat_timestamp": "2019-09-24 17:19:17", "description": null, "resources_synced": null, "availability_zone": "nova", "alive": true, "configurations": {"dhcp_driver": "neutron.agent.linux.dhcp.Dnsmasq", "dhcp_lease_duration": 86400, "log_agent_heartbeats": false, "networks": 0, "ports": 0, "subnets": 0}}, {"id": "45d76247-ec5e-439d-b966-3045087e35e0", "agent_type": "Open vSwitch agent", "binary": "neutron-openvswitch-agent", "topic": "N/A", "host": "compute-0.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:30", "started_at": "2019-09-24 16:47:00", "heartbeat_timestamp": "2019-09-24 17:19:30", "description": null, "resources_synced": null, "availability_zone": null, "alive": true, "configurations": {"arp_responder_enabled": false, "bridge_mappings": {"datacentre": "br-ex", "tenant": "br-isolated"}, "datapath_type": "system", "devices": 0, "enable_distributed_routing": false, "extensions": ["qos"], "in_distributed_mode": false, "integration_bridge": "br-int", "l2_population": false, "log_agent_heartbeats": false, "ovs_capabilities": {"datapath_types": ["netdev", "system"], "iface_types": ["erspan", "geneve", "gre", "internal", "ip6erspan", "ip6gre", "lisp", "patch", "stt", "system", "tap", "vxlan"]}, "ovs_hybrid_plug": true, "resource_provider_bandwidths": {}, "resource_provider_inventory_defaults": {"allocation_ratio": 1.0, "min_unit": 1, "step_size": 1, "reserved": 0}, "tunnel_types": ["vxlan"], "tunneling_ip": "172.17.2.131", "vhostuser_socket_dir": "/var/run/openvswitch"}}, {"id": "5555b04e-ea86-498e-8c93-a83553e52bf1", "agent_type": "Metadata agent", "binary": "neutron-metadata-agent", "topic": "N/A", "host": "controller-0.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:23", "started_at": "2019-09-24 16:46:23", "heartbeat_timestamp": "2019-09-24 17:19:23", "description": null, "resources_synced": null, "availability_zone": null, "alive": true, "configurations": {"log_agent_heartbeats": false, "metadata_proxy_socket": "/var/lib/neutron/metadata_proxy", "nova_metadata_host": "overcloud.internalapi.localdomain", "nova_metadata_port": 8775}}, {"id": "948d978a-4df1-4de9-82aa-0ba2cc4a0da9", "agent_type": "Open vSwitch agent", "binary": "neutron-openvswitch-agent", "topic": "N/A", "host": "controller-1.redhat.local", "admin_state_up": true, "created_at": "2019-09-24 16:46:32", "started_at": "2019-09-24 16:47:02", "heartbeat_timestamp": "2019-09-24 17:19:32", "description": null, "resources_synced": null, "availability_zone": null, "alive":
  }}}

  Traceback (most recent call last):
    File "/usr/lib/python3.6/site-packages/neutron_tempest_plugin/api/admin/test_agent_management.py", line 42, in test_list_agent
      self.assertIn(self.agent, agents)
    File "/usr/lib/python3.6/site-packages/testtools/testcase.py", line 417, in assertIn
      self.assertThat(haystack, Contains(needle), message)
    File "/usr/lib/python3.6/site-packages/testtools/testcase.py", line 498, in assertThat
      raise mismatch_error
  testtools.matchers._impl.MismatchError: {'id': '29cbb538-fc95-4ec9-9d7d-5028a6ed7d82', 'agent_type': 'L3 agent', 'binary': 'neutron-l3-agent', 'topic': 'l3_agent', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:20', 'started_at': '2019-09-24 16:46:20', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True} not in [{'id': '29cbb538-fc95-4ec9-9d7d-5028a6ed7d82', 'agent_type': 'L3 agent', 'binary': 'neutron-l3-agent', 'topic': 'l3_agent', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:20', 'started_at': '2019-09-24 16:46:20', 'description': 'description for update agent.', 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': '2c347a90-f262-47a2-b980-bab1aa1fb294', 'agent_type': 'DHCP agent', 'binary': 'neutron-dhcp-agent', 'topic': 'dhcp_agent', 'host': 'controller-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:16', 'started_at': '2019-09-24 16:46:16', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': '41032db3-4508-4f93-b840-e9ca38f22479', 'agent_type': 'DHCP agent', 'binary': 'neutron-dhcp-agent', 'topic': 'dhcp_agent', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:17', 'started_at': '2019-09-24 16:46:17', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': '45d76247-ec5e-439d-b966-3045087e35e0', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'compute-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:30', 'started_at': '2019-09-24 16:47:00', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': '5555b04e-ea86-498e-8c93-a83553e52bf1', 'agent_type': 'Metadata agent', 'binary': 'neutron-metadata-agent', 'topic': 'N/A', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:23', 'started_at': '2019-09-24 16:46:23', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': '948d978a-4df1-4de9-82aa-0ba2cc4a0da9', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'controller-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:32', 'started_at': '2019-09-24 16:47:02', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'a11efdd7-83ce-4449-8fd4-fbf11ed86ecc', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'controller-0.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:33', 'started_at': '2019-09-24 16:47:03', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'aacd3aee-caf6-403e-8890-5fce6867ce24', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'controller-2.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:32', 'started_at': '2019-09-24 16:47:02', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'c940f293-0e33-4586-bfce-4caba48560a4', 'agent_type': 'Metadata agent', 'binary': 'neutron-metadata-agent', 'topic': 'N/A', 'host': 'controller-2.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:23', 'started_at': '2019-09-24 16:46:23', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'cfce4183-5ff5-49a2-9957-54434b218afd', 'agent_type': 'Open vSwitch agent', 'binary': 'neutron-openvswitch-agent', 'topic': 'N/A', 'host': 'compute-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:29', 'started_at': '2019-09-24 16:46:59', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}, {'id': 'd8c1b0b7-a84d-48b3-be24-184c44c2123a', 'agent_type': 'DHCP agent', 'binary': 'neutron-dhcp-agent', 'topic': 'dhcp_agent', 'host': 'controller-2.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:17', 'started_at': '2019-09-24 16:46:17', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': 'dae0d572-2edb-4d39-9e7a-43206c0d234d', 'agent_type': 'L3 agent', 'binary': 'neutron-l3-agent', 'topic': 'l3_agent', 'host': 'controller-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:20', 'started_at': '2019-09-24 16:46:20', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': 'daf0c85a-1472-4dfb-816b-7aad7ee70a8b', 'agent_type': 'L3 agent', 'binary': 'neutron-l3-agent', 'topic': 'l3_agent', 'host': 'controller-2.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:20', 'started_at': '2019-09-24 16:46:20', 'description': None, 'resources_synced': None, 'availability_zone': 'nova', 'alive': True}, {'id': 'e7651528-ed52-489e-9e58-31105aad469c', 'agent_type': 'Metadata agent', 'binary': 'neutron-metadata-agent', 'topic': 'N/A', 'host': 'controller-1.redhat.local', 'admin_state_up': True, 'created_at': '2019-09-24 16:46:22', 'started_at': '2019-09-24 16:46:22', 'description': None, 'resources_synced': None, 'availability_zone': None, 'alive': True}]

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https://bugs.launchpad.net/neutron/+bug/1845330/+subscriptions
Follow ups

[Bug 1845330] Re: neutron-tempest-plugin API test for list agents failure
From: OpenStack Infra, 2019-10-23