Created attachment 654286 [details] ad-hoc patch to ipnetns.c Description of problem: When network namespace is enabled, dhcp-agent and l3-agent sometimes files to execute "ip netns" with the following error. ---- Command: ['sudo', 'quantum-rootwrap', '/etc/quantum/rootwrap.conf', 'ip', 'netns', 'exec', 'qdhcp-359fd226-4680-469c-84d1-bbe733c3e6ca', 'ip', 'link', 'set', 'tapa2491012-8e', 'up'] Exit code: 1 Stdout: '' Stderr: 'mount of /sys failed: Device or resource busy\n' ---- Command: ['sudo', 'quantum-rootwrap', '/etc/quantum/rootwrap.conf', 'ip', 'netns', 'exec', 'qrouter-08ad50c6-4081-45f8-954d-b76595a8bcb9', 'sysctl', '-w', 'net.ipv4.ip_forward=1'] Exit code: 1 Stdout: '' Stderr: 'mount of /sys failed: Device or resource busy\n' ---- Version-Release number of selected component (if applicable): # rpm -qa |grep quantum python-quantum-2012.2-1.fc18.noarch openstack-quantum-openvswitch-2012.2-1.fc18.noarch python-quantumclient-2.1.1-0.fc18.noarch openstack-quantum-2012.2-1.fc18.noarch Additional info: As it looks depending on the timing of executing "ip netns", I added an ad-hoc patch to ip command as in the attached. It worked for me, at least, though there should be more fundamental fix.
Created attachment 654745 [details] Alternative patch for quantum/agent/linux/utils.py Instead of applying patch to ip, I tried another patch for quantum/agent/linux/utils.py. This worked for me, too.
This could be related to bug 882047.
Yes. In my setup, iproute-3.6.0-6.fc18 issued with #882047 resolved this, too.
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