[libvirt-users] VM migration upon shutdown in centos 7
Hi, I have CentOS 7, two node system which allows live VM migration between them. Live migration triggered from virsh is happily happening. I am using GlusterFS for replicating VM disk files. Now I want to automatically do the live migration at the time of reboot/shutdown/halt of the host node and for this I have written a systemd service unit [vPreShutdownHook.service] and placed the live migration command in a migrate script which is invoked from this service unit. The migrate script is invoked but migration does not happen. If someone has some idea please help me to migrate VM upon shutdown. ######## vPreShutdownHook.service ############### [Unit] Description=vPreShutdownHook Requires=network.target Requires=libvirtd.service Requires=dbus.service Requires=glusterd.service Requires=glusterfsd.service DefaultDependencies=no Before=shutdown.target reboot.target [Service] Type=oneshot RemainAfterExit=true ExecStart=/bin/true ExecStop=/root/vm_migrate.sh [Install] WantedBy=multi-user.target ########## Command to migrate ############ /usr/bin/virsh migrate --verbose --p2p --tunneled --live --compressed --comp-methods "mt" --comp-mt-level 5 --comp-mt-threads 5 --comp-mt-dthreads 5 MY_VM qemu+ssh://root@$node2/system Thanks,
----- Original Message -----
From: "Raman Gupta" <ramangupta16@gmail.com> To: libvirt-users@redhat.com Sent: Friday, January 5, 2018 7:00:49 PM Subject: [libvirt-users] VM migration upon shutdown in centos 7
Hi,
I have CentOS 7, two node system which allows live VM migration between them. Live migration triggered from virsh is happily happening. I am using GlusterFS for replicating VM disk files.
Now I want to automatically do the live migration at the time of reboot/shutdown/halt of the host node and for this I have written a systemd service unit [vPreShutdownHook.service] and placed the live migration command in a migrate script which is invoked from this service unit. The migrate script is invoked but migration does not happen. If someone has some idea please help me to migrate VM upon shutdown.
######## vPreShutdownHook.service ###############
[Unit] Description=vPreShutdownHook Requires=network.target Requires=libvirtd.service Requires=dbus.service Requires=glusterd.service Requires=glusterfsd.service DefaultDependencies=no Before=shutdown.target reboot.target
[Service] Type=oneshot RemainAfterExit=true ExecStart=/bin/true ExecStop=/root/vm_migrate.sh
[Install] WantedBy=multi-user.target
########## Command to migrate ############ /usr/bin/virsh migrate --verbose --p2p --tunneled --live --compressed Please modify "--tunneled" to "tunnelled" and try again.
--comp-methods "mt" --comp-mt-level 5 --comp-mt-threads 5 --comp-mt-dthreads 5 MY_VM qemu+ssh://root@$node2/system
Thanks,
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On 01/05/2018 12:00 PM, Raman Gupta wrote:
Hi,
I have CentOS 7, two node system which allows live VM migration between them. Live migration triggered from virsh is happily happening. I am using GlusterFS for replicating VM disk files.
Now I want to automatically do the live migration at the time of reboot/shutdown/halt of the host node and for this I have written a systemd service unit [vPreShutdownHook.service] and placed the live migration command in a migrate script which is invoked from this service unit. The migrate script is invoked but migration does not happen. If someone has some idea please help me to migrate VM upon shutdown.
######## vPreShutdownHook.service ###############
[Unit] Description=vPreShutdownHook Requires=network.target Requires=libvirtd.service Requires=dbus.service Requires=glusterd.service Requires=glusterfsd.service DefaultDependencies=no Before=shutdown.target reboot.target
[Service] Type=oneshot RemainAfterExit=true ExecStart=/bin/true ExecStop=/root/vm_migrate.sh
[Install] WantedBy=multi-user.target
########## Command to migrate ############ /usr/bin/virsh migrate --verbose --p2p --tunneled --live --compressed --comp-methods "mt" --comp-mt-level 5 --comp-mt-threads 5 --comp-mt-dthreads 5 MY_VM qemu+ssh://root@$node2/system
Does this command alone succeed? BTW: unless really needed --live will only make the migration take longer. I don't know enough about systemd but maybe it's not waiting for virsh to finish? Can you try to get any logs to see what is going on actually? Michal
participants (3)
-
Alice(Fangge Jin) -
Michal Privoznik -
Raman Gupta