qemu-guest-agent stop work when fsfreeze
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
QEMU |
Expired
|
Undecided
|
Unassigned |
Bug Description
Create a live snapshot, we should first to fsfreeze the file system. We do have only one disk mounted to /:
Filesystem Size Used Avail Use% Mounted on
udev 48G 0 48G 0% /dev
tmpfs 9.5G 8.7M 9.5G 1% /run
/dev/vda1 485G 1.5G 484G 1% /
tmpfs 48G 0 48G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 48G 0 48G 0% /sys/fs/cgroup
tmpfs 9.5G 0 9.5G 0% /run/user/0
snapshot action is OK, when we restore the snapshot, the file system became read-only, and syslog seems stop writing until we fsck /dev/vda1 and mount -o rw,remount /:
Dec 5 00:39:16 systemd[1]: Started Session 180 of user root.
Dec 5 00:45:05 qemu-ga: info: guest-fsfreeze called
Dec 5 07:00:45 kernel: [ 114.623823] EXT4-fs (vda1): re-mounted. Opts: (null)
So after snapshoting, wo do fsthaw the file system, maybe the qga dose not respond or stop work, this action dose not execute successfully and there is no log to show the status of qemu-guest-agent.
Version:
libvirt 1.2.17
qemu 2.3.0
qemu-guest-agent 2.5
Just got almost the same
Ubuntu 16.04 as guest on Centos 7 host,
all will latest updates.
Execute of :"guest- fsfreeze- freeze" }'
virsh qemu-agent-command inetgw2 '{"execute"
failed with agent not available ( or something like this), but fsfreeze executed in OS
Apr 7 02:28:54 inetgw2 qemu-ga: info: guest-fsfreeze called
snapshot was created :"guest- fsfreeze- thaw"}'
after this
virsh qemu-agent-command inetgw2 '{"execute"
failed too with agent not available
So Ubuntu 16.04 VM stuck in freezed i/o state.
qemu-guest-age 1:2.5+dfsg-5
Same version...
Thank you!