Comment 0 for bug 1722946

In previous releases, and upgrade to the openvswitch packages which results in a restart of the userspace daemons is detected by the neutron-openvswitch-agent, which then tidies and restores the required state resulting in a minimal outage to instances on the hypervisor being upgrades.

Whilst testing updates to ovs 2.8.1, I noted that instance connectivity dropped but was never restored; restarting the neutron-openvswitch-agent resolved the issue.

2017-10-11 22:12:43.481 28598 WARNING ovsdbapp.backend.ovs_idl.vlog [-] tcp:127.0.0.1:6640: send error: Connection refused
2017-10-11 22:12:43.482 28598 WARNING ovsdbapp.backend.ovs_idl.vlog [-] tcp:127.0.0.1:6640: connection dropped (Connection refused)
2017-10-11 22:12:45.332 28598 WARNING neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-d616236d-5a5f-4f55-a721-83ff5079e5f0 - - - - -] OVS is restarted. OVSNeutronAgent will reset bridges and recover ports.
2017-10-11 22:12:45.647 28598 INFO neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-d616236d-5a5f-4f55-a721-83ff5079e5f0 - - - - -] Mapping physical network physnet1 to bridge br-data
2017-10-11 22:12:45.700 28598 INFO neutron.plugins.ml2.drivers.openvswitch.agent.openflow.native.ovs_bridge [req-d616236d-5a5f-4f55-a721-83ff5079e5f0 - - - - -] Bridge br-data has datapath-ID 00003e24776a3b44
2017-10-11 22:12:45.886 28598 INFO neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-d616236d-5a5f-4f55-a721-83ff5079e5f0 - - - - -] Port b08484e1-5e7d-45e9-86d8-7078ded39d9f updated. Details: {'profile': {}, 'network_qos_policy_id': None, 'qos_policy_id': None, 'allowed_address_pairs': [], 'admin_state_up': True, 'network_id': 'f1b6715f-9d79-457f-8272-6b54d0f82332', 'segmentation_id': 5, 'fixed_ips': [{'subnet_id': 'b069aeff-8879-4007-9799-bd350c3d1e5c', 'ip_address': '192.168.21.3'}], 'device_owner': u'compute:nova', 'physical_network': None, 'mac_address': 'fa:16:3e:69:89:92', 'device': u'b08484e1-5e7d-45e9-86d8-7078ded39d9f', 'port_security_enabled': True, 'port_id': 'b08484e1-5e7d-45e9-86d8-7078ded39d9f', 'network_type': u'gre', 'security_groups': ['84afead6-fcc4-45f7-94f1-017f263ca080']}
2017-10-11 22:12:45.887 28598 INFO neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-d616236d-5a5f-4f55-a721-83ff5079e5f0 - - - - -] Assigning 1 as local vlan for net-id=f1b6715f-9d79-457f-8272-6b54d0f82332
2017-10-11 22:12:45.892 28598 INFO neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-d616236d-5a5f-4f55-a721-83ff5079e5f0 - - - - -] Port 8aedca8c-fd85-42f0-97fa-eacb43a3364b updated. Details: {'profile': {}, 'network_qos_policy_id': None, 'qos_policy_id': None, 'allowed_address_pairs': [], 'admin_state_up': True, 'network_id': 'f1b6715f-9d79-457f-8272-6b54d0f82332', 'segmentation_id': 5, 'fixed_ips': [{'subnet_id': 'b069aeff-8879-4007-9799-bd350c3d1e5c', 'ip_address': '192.168.21.10'}], 'device_owner': u'compute:nova', 'physical_network': None, 'mac_address': 'fa:16:3e:50:b7:1a', 'device': u'8aedca8c-fd85-42f0-97fa-eacb43a3364b', 'port_security_enabled': True, 'port_id': '8aedca8c-fd85-42f0-97fa-eacb43a3364b', 'network_type': u'gre', 'security_groups': ['84afead6-fcc4-45f7-94f1-017f263ca080']}
2017-10-11 22:12:45.893 28598 INFO neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-d616236d-5a5f-4f55-a721-83ff5079e5f0 - - - - -] Assigning 1 as local vlan for net-id=f1b6715f-9d79-457f-8272-6b54d0f82332
2017-10-11 22:12:45.902 28598 INFO neutron.agent.securitygroups_rpc [req-d616236d-5a5f-4f55-a721-83ff5079e5f0 - - - - -] Preparing filters for devices set([u'b08484e1-5e7d-45e9-86d8-7078ded39d9f', u'8aedca8c-fd85-42f0-97fa-eacb43a3364b'])
2017-10-11 22:12:47.813 28598 INFO neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent [req-d616236d-5a5f-4f55-a721-83ff5079e5f0 - - - - -] Configuration for devices up [u'b08484e1-5e7d-45e9-86d8-7078ded39d9f', u'8aedca8c-fd85-42f0-97fa-eacb43a3364b'] and devices down [] completed.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: neutron-openvswitch-agent 2:11.0.1-0ubuntu1~cloud0 [origin: Canonical]
ProcVersionSignature: Ubuntu 4.4.0-96.119-generic 4.4.83
Uname: Linux 4.4.0-96-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CrashDB:
 {
                "impl": "launchpad",
                "project": "cloud-archive",
                "bug_pattern_url": "http://people.canonical.com/~ubuntu-archive/bugpatterns/bugpatterns.xml",
             }
Date: Wed Oct 11 22:17:32 2017
Ec2AMI: ami-0000022c
Ec2AMIManifest: FIXME
Ec2AvailabilityZone: nova
Ec2InstanceType: m1.medium
Ec2Kernel: unavailable
Ec2Ramdisk: unavailable
PackageArchitecture: all
ProcEnviron:
 TERM=screen-256color-bce
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: neutron
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.neutron.plugins.ml2.openvswitch_agent.ini: 2017-10-11T19:36:21.675410