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Description of problem: virsh iface:should prompt user destroy iface first before undefine it Version-Release number of selected component (if applicable): libvirt-0.9.3-1.el6.x86_64 How reproducible: Always Steps to Reproduce: 1.make sure interface eth0 active # virsh iface-list --all Name State MAC Address -------------------------------------------- eth0 active 1c:6f:65:06:ba:42 lo active 00:00:00:00:00:00 2. # virsh iface-undefine eth0 Interface eth0 undefined 3. # virsh iface-list --all Name State MAC Address -------------------------------------------- lo active 00:00:00:00:00:00 4.# ls /etc/sysconfig/network-scripts/ifcfg-eth0 ls: cannot access /etc/sysconfig/network-scripts/ifcfg-eth0: No such file or directory 5.#ifconfig eth0 eth0 Link encap:Ethernet HWaddr 1C:6F:65:06:BA:42 inet addr:10.66.6.166 Bcast:10.66.7.255 Mask:255.255.252.0 inet6 addr: fe80::1e6f:65ff:fe06:ba42/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1562 errors:0 dropped:0 overruns:0 frame:0 TX packets:512 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:392939 (383.7 KiB) TX bytes:70424 (68.7 KiB) Interrupt:16 Memory:fc300000-fc320000 6:# ifdown eth0 usage: ifdown <device name> Actual results: ifcfg-eth0 file removed, but actually the interface eth0 exist and can't use ifdown/ifup Expected results: Should be a prompt before use iface-undefine an active interface like following. # virsh iface-undefine eth0 error:Failed to undefine eth0 error:Requested operation is not valid: cannot delete active interface Additional info: in virsh man page: iface-undefine iface Undefine the configuration for an inactive host interface.
I have sent a patch to upstream, and wait for developers review: https://www.redhat.com/archives/libvir-list/2011-July/msg00859.html Alex
sent patch, waiting for review: https://www.redhat.com/archives/libvir-list/2011-July/msg00966.html
Even though I've sent patch, now that I am re-thinking this over again I don't think this is okay with libvirt policy. I mean, it's possible to have persistent domain, start it and undefine while running (=> transfer to transient domain). Therefore in fact, we want to make undefine on active device/interface possible. But I must admit that libvirt doesn't know anything like transient interfaces yet. And that's where I see the fix should aim. Introducing transient interfaces to libvirt. Thoughts? Setting condNak design meanwhile.
transient interfaces probably requires heavy netcf coordination, and given that netcf is basically maintenance mode at this point I doubt this will ever be fixed as suggested in Comment #5. closing