** Description changed:
Versions:
root@juju-xh-machine-5:~# dpkg -l|grep openvswitch
ii openvswitch-common 2.0.2-0ubuntu0.14.04.1 amd64
Open vSwitch common components
ii openvswitch-switch 2.0.2-0ubuntu0.14.04.1 amd64
Open vSwitch switch implementations
root@juju-xh-machine-5:~# uname -a
Linux juju-precise-machine-5 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8
19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
root@juju-xh-machine-5:~# cat /etc/issue
Ubuntu 14.04.1 LTS \n \l
+
+ root@juju-precise-machine-5:/var/log/neutron# dpkg -l|grep neutron
+ ii neutron-common 1:2014.1.3-0ubuntu1.1 all
Neutron is a virtual network service for Openstack - common
+ ii neutron-plugin-ml2 1:2014.1.3-0ubuntu1.1 all
Neutron is a virtual network service for Openstack - ML2 plugin
+ ii neutron-plugin-openvswitch-agent 1:2014.1.3-0ubuntu1.1 all
Neutron is a virtual network service for Openstack - Open vSwitch
plugin agent
+ ii python-neutron 1:2014.1.3-0ubuntu1.1 all
Neutron is a virutal network service for Openstack - Python
Erros:
root@juju-xh-machine-5:~# ovs-vsctl show
2014-12-25T09:26:56Z|00001|reconnect|WARN|unix:/var/run/openvswitch/db.sock:
connection attempt failed (Protocol error)
ovs-vsctl: unix:/var/run/openvswitch/db.sock: database connection failed
(Protocol error)
root@juju-precise-machine-5:~# tail -f /var/log/neutron/openvswitch-agent.log
2014-12-25 09:37:03.990 20991 ERROR neutron.agent.linux.ovsdb_monitor [-]
Error received from ovsdb monitor: ovsdb-client:
unix:/var/run/openvswitch/db.sock: receive failed (End of file)
2014-12-25 09:44:53.796 20991 ERROR neutron.agent.linux.ovsdb_monitor [-]
Error received from ovsdb monitor:
2014-12-25T09:44:53Z|00001|fatal_signal|WARN|terminating with signal 15
(Terminated)
Workaround:
restart openvswitch-switch
But ovs-vsctl will get this error every several minutes, this caused
neutron-plugin-openvswitch-agent keep reporting errors since ovs-vsctl
is wrong.
+
+ The root cause is :
+ Neutron agent will call ovs monitor to get interfaces info, but ovs monitor
process will be respawned every 'respawn_interval' minutes due to get error
output 'sudo: unable to resolve host juju-precise-machine-5' when running
command 'sudo neutron-rootwrap /etc/neutron/rootwrap.conf ovsdb-client monitor
Interface name,ofport --format=json', after several times the ovs db socket is
reconnected for multiple times, however, some of them are not released well,
and it goes to the maxim limit of socket number, which leads to connect to
ovsdb server failed.
+
+ Currently, one possible fix in code is to add hostname to /etc/hosts
+ followed by 127.0.0.1 or localhost to avoid the error 'sudo: unable to
+ resolve host juju-precise-machine-5' in openvswitch charm.
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https://bugs.launchpad.net/bugs/1405588
Title:
database connection failed (Protocol error)
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