版本Ubuntu 12.04 Icehouse
/var/log/neutron/openvswitch-agent.log
Stderr: 'sudo: no tty present and no askpass program specified\nSorry, try again.\nsudo: no tty present and no askpass program specified\nSorry, try again.\nsudo: no tty present and no askpass program specified\nSorry, try again.\nsudo: 3 incorrect password attempts\n'
2015-12-18 15:06:45.459 28397 ERROR neutron.agent.linux.ovs_lib [-] Unable to execute ['ovs-vsctl', '--timeout=10', '--', 'set-fail-mode', 'br-int', 'secure']. Exception:
Command: ['sudo', 'ovs-vsctl', '--timeout=10', '--', 'set-fail-mode', 'br-int', 'secure']
Exit code: 1
Stdout: ''
Stderr: 'sudo: no tty present and no askpass program specified\nSorry, try again.\nsudo: no tty present and no askpass program specified\nSorry, try again.\nsudo: no tty present and no askpass program specified\nSorry, try again.\nsudo: 3 incorrect password attempts\n'
2015-12-18 15:06:45.459 28397 CRITICAL neutron [-]
Command: ['sudo', 'ovs-vsctl', '--timeout=10', '--', 'set-fail-mode', 'br-int', 'secure']
Exit code: 1
Stdout: ''
Stderr: 'sudo: no tty present and no askpass program specified\nSorry, try again.\nsudo: no tty present and no askpass program specified\nSorry, try again.\nsudo: no tty present and no askpass program specified\nSorry, try again.\nsudo: 3 incorrect password attempts\n'
ERROR neutron.agent.linux.ovs_lib [-] Unable to execute ['ovs-vsctl', '--timeout=10'
解决办法：
/etc/neutron/neutron.conf
添加如下：
[agent]
root_helper = sudo /usr/bin/neutron-rootwrap /etc/neutron/rootwrap.conf
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