From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46745) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZD9Cj-0005Zt-1o for qemu-devel@nongnu.org; Thu, 09 Jul 2015 06:37:22 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZD9Ch-0003Lj-Up for qemu-devel@nongnu.org; Thu, 09 Jul 2015 06:37:20 -0400 Date: Thu, 9 Jul 2015 11:37:05 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20150709103705.GF2359@work-vm> References: <20150707091323.GC2347@work-vm> <559B9A80.5080901@redhat.com> <559C04CE.4090103@linux.vnet.ibm.com> <559C7F06.3020100@cn.fujitsu.com> <559D4692.3060002@linux.vnet.ibm.com> <559DC78D.3060609@cn.fujitsu.com> <20150709015525.GF2741@work-vm> <559DD7CA.2050103@cn.fujitsu.com> <20150709091610.GC2359@work-vm> <559E3FDD.7040705@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <559E3FDD.7040705@cn.fujitsu.com> Subject: Re: [Qemu-devel] [PATCH COLO-BLOCK v7 00/17] Block replication for continuous checkpoints List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Wen Congyang Cc: Kevin Wolf , Yang Hongyang , Fam Zheng , Wen Congyang , qemu block , Jiang Yunhong , Dong Eddie , "Dr. David Alan Gilbert" , "Michael R. Hines" , qemu devel , "Michael R. Hines" , Stefan Hajnoczi , Paolo Bonzini , Max Reitz , Lai Jiangshan * Wen Congyang (wency@cn.fujitsu.com) wrote: > On 07/09/2015 05:16 PM, Dr. David Alan Gilbert wrote: > > * Wen Congyang (wency@cn.fujitsu.com) wrote: > > > >>>> I have sent the v8. But the usage is not changed. You can setup the environment according to the wiki. > >>>> When we open nbd client, we need to connect to the nbd server. So I introduce a new command child_add to add NBD client > >>>> as a quorum child when the nbd server is ready. > >>>> > >>>> The nbd server is ready after you run the following command: > >>>> nbd_server_start 0:6262 # the secondary qemu will listen to host:port > >>>> nbd_server_add -w mc1 # the NBD server will know this disk is used as NBD server. The export name is its id wc1. > >>>> # -w means we allow to write to this disk. > >>>> > >>>> Then you can run the following command in the primary qemu: > >>>> child_add disk1 child.driver=replication,child.mode=primary,child.file.host=127.0.0.1,child.file.port=6262,child.file.export=mc1,child.file.driver=nbd,child.ignore-errors=on > >>>> > >>>> After this monitor command, nbd client has connected to the nbd server. > >>> > >>> Ah! The 'child.file.export=mc1' wasn't there previously; I see Yang added that to the wiki yesterday; > >>> that probably explains the problem that we've been having. > >> > >> Sorry for this mistake. > > > > OK, so this is working for me (with the 7.2 world). What isn't working in this setup is migrate -b, I get: > > > > (qemu) Receiving block device images > > Error unknown block device disk1 > > qemu-system-x86_64: error while loading state section id 1(block) > > qemu-system-x86_64: load of migration failed: Invalid argument > > > > Can you explain the id=disk1 on the master side? > > Can you give me the command line? I think the id in primary and secondary qemu is not same. Sure, primary: ./try/bin/qemu-system-x86_64 -enable-kvm -nographic \ -boot c -m 4096 -smp 4 -S \ -name debug-threads=on -trace events=trace-file \ -netdev tap,id=hn0,script=$PWD/ifup-prim,\ downscript=no,colo_script=$PWD/qemu/scripts/colo-proxy-script.sh,colo_nicname=em4 \ -device e1000,mac=9c:da:4d:1c:b5:89,id=net-pci0,netdev=hn0 \ -device virtio-rng-pci \ -drive if=virtio,id=disk1,driver=quorum,read-pattern=fifo,\ cache=none,aio=native,\ children.0.file.filename=./bugzilla.raw,\ children.0.driver=raw Sure, secondary: TMPDISKS=/run qemu-img create -f qcow2 $TMPDISKS/colo-hidden-disk.qcow2 40G qemu-img create -f qcow2 $TMPDISKS/colo-active-disk.qcow2 40G ./try/bin/qemu-system-x86_64 -enable-kvm -nographic \ -boot c -m 4096 -smp 4 -S \ -name debug-threads=on -trace events=trace-file \ -netdev tap,id=hn0,script=$PWD/ifup-slave,\ downscript=no,colo_script=$PWD/qemu/scripts/colo-proxy-script.sh,colo_nicname=em4 \ -device e1000,mac=9c:da:4d:1c:b5:89,id=net-pci0,netdev=hn0 \ -device virtio-rng-pci \ -drive if=none,driver=raw,file=/home/localvms/bugzilla.raw,id=colo1,cache=none,aio=native \ -drive if=virtio,driver=replication,mode=secondary,export=colo1,throttling.bps-total-max=70000000,\ file.file.filename=$TMPDISKS/colo-active-disk.qcow2,\ file.driver=qcow2,\ file.backing.file.filename=$TMPDISKS/colo-hidden-disk.qcow2,\ file.backing.driver=qcow2,\ file.backing.backing.backing_reference=colo1,\ file.backing.allow-write-backing-file=on \ -incoming tcp:0:8888 Secondary: nbd_server_start :8889 nbd_server_add -w colo1 primary: child_add disk1 child.driver=replication,child.mode=primary,child.file.host=ibpair,child.file.port=8889,child.file.export=colo1,child.file.driver=nbd,child.ignore-errors=on (qemu) migrate_set_capability colo on (qemu) migrate -d -b tcp:ibpair:8888 note the 'id=disk1' in the primary is shown in your wiki. Dave Thanks > Wen Congyang > > > > > Dave > > > >> > >> Thanks > >> Wen Congyang > >> > >>> > >>> Dave > >>> > >>>> > >>>> Thanks > >>>> Wen Congyang > >>>> > >>>>> > >>>>> - Michael > >>>>> > >>>>> . > >>>>> > >>>> > >>>> > >>> -- > >>> Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK > >>> . > >>> > >> > > -- > > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK > > . > > > > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK