[Pacemaker] How to live migrate the kvm vm

[Dan Frincu]

Hi,

On Tue, Dec 13, 2011 at 6:11 AM, Qiu Zhigang <qiuzhigang at fronware.com> wrote:
> Hi,
>
> Thank you, you are right, I correct the 'allow-migrate="true"', but now I found another problem when migrate, migrate failed.
> The following is the log.
>
> Dec 13 12:10:03 h10_151 kernel: type=1400 audit(1323749403.251:623): avc:  denied  { search } for  pid=27201 comm="virsh" name="libvirt" dev=dm-0 ino=2098071 scontext=unconfined_u:system_r:corosync_t:s0 tcontext=system_u:object_r:virt_var_run_t:s0 tclass=dir
> Dec 13 12:10:04 h10_151 kernel: type=1400 audit(1323749404.067:624): avc:  denied  { search } for  pid=27218 comm="VirtualDomain" name="" dev=0:1c ino=13825028 scontext=unconfined_u:system_r:corosync_t:s0 tcontext=system_u:object_r:nfs_t:s0 tclass=dir
> Dec 13 12:10:04 h10_151 kernel: type=1400 audit(1323749404.252:625): avc:  denied  { read } for  pid=27242 comm="virsh" name="random" dev=devtmpfs ino=3585 scontext=unconfined_u:system_r:corosync_t:s0 tcontext=system_u:object_r:random_device_t:s0 tclass=chr_file

You need to take a look at the SELinux context.

Regards,
Dan

>
> [root at h10_145 ~]# crm
> crm(live)# status
> ============
> Last updated: Tue Dec 13 12:09:06 2011
> Stack: openais
> Current DC: h10_145 - partition with quorum
> Version: 1.1.2-f059ec7ced7a86f18e5490b67ebf4a0b963bccfe
> 2 Nodes configured, 2 expected votes
> 2 Resources configured.
> ============
>
> Online: [ h10_151 h10_145 ]
>
>  test2  (ocf::heartbeat:VirtualDomain): Started h10_151 (unmanaged) FAILED
>  test1  (ocf::heartbeat:VirtualDomain): Started h10_145 (unmanaged) FAILED
>
> Failed actions:
>    test1_stop_0 (node=h10_145, call=19, rc=1, status=complete): unknown error
>    test2_stop_0 (node=h10_151, call=14, rc=1, status=complete): unknown error
>
> Best Regards,
>
>> -----Original Message-----
>> From: Arnold Krille [mailto:arnold at arnoldarts.de]
>> Sent: Monday, December 12, 2011 7:52 PM
>> To: The Pacemaker cluster resource manager
>> Subject: Re: [Pacemaker] How to live migrate the kvm vm
>>
>> Hi,
>>
>> On Monday 12 December 2011 11:22:51 邱志刚 wrote:
>> > I have 2-node cluster of pacemaker,I want to migrate the kvm vm with
>> > command "migrate", but I found the vm isn't migrated, actually it is
>> > shutdown and then start on other node. I checked the log and found the
>> > vm is stopped but not migrated.
>>
>> > How could I live migrate the vm ? The configuration :
>> > crm(live)configure# show
>> > primitive test1 ocf:heartbeat:VirtualDomain \
>> >     params config="/etc/libvirt/qemu/test1.xml"
>> > hypervisor="qemu:///system" \
>> >     meta allow-migrate="ture" priority="100" target-role="Started"
>> > is-managed="true" \
>> >     op start interval="0" timeout="120s" \
>> >     op stop interval="0" timeout="120s" \
>> >     op monitor interval="10s" timeout="30s" depth="0" \
>> >     op migrate_from interval="0" timeout="120s" \
>> >     op migrate_to interval="0" timeout="120"
>>
>> I hope that "ture" is only a typo when writing the email. Otherwise its probably
>> the reason why your machine stop-start instead of a nice migration.
>> Try with 'allow-migrate="true"' and see if that helps.
>>
>> Have fun,
>>
>> Arnold
>
>
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-- 
Dan Frincu
CCNA, RHCE