Re: RBD I/O errors with QEMU [luminous upgrade/osd change]

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On Sun, Sep 10, 2017 at 03:56:21PM +0200, Nico Schottelius wrote:
> 
> Just tried and there is not much more log in ceph -w (see below) neither
> from the qemu process.
> 
> [15:52:43] server4:~$  /usr/bin/qemu-system-x86_64 -name one-17031 -S
> -machine pc-i440fx-2.1,accel=kvm,usb=off -m 8192 -realtime mlock=off
> -smp 6,sockets=6,cores=1,threads=1 -uuid
> 79845fca-9b26-4072-bcb3-7f5206c2a531 -no-user-config -nodefaults
> -chardev
> socket,id=charmonitor,path=/var/lib/libvirt/qemu/one-17031.monitor,server,nowait
> -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc
> -no-shutdown -boot strict=on -device
> piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive
> file='rbd:one/one-29-17031-0:id=libvirt:key=DELETEME:auth_supported=cephx\;none:mon_host=server1\:6789\;server3\:6789\;server5\:6789,if=none,id=drive-virtio-disk0,format=raw,cache=none' -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=/var/lib/one//datastores/100/17031/disk.1,if=none,id=drive-ide0-0-0,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -vnc [::]:21131 -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 -msg timestamp=on 2>&1 | tee kvmlogwithdebug
> 
> -> no output

Try to find where the qemu process writes the ceph log, e.g. with the
help of lsof utility. Or add something like below

 log file = /tmp/ceph.$name.$pid.log

to ceph.conf before starting qemu and look for /tmp/ceph.*.log

-- 
Mykola Golub
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