[Bug 1770417] Re: Qemu can not parse long fqdns during drive-mirror

[Thomas Huth]

The QEMU project is currently considering to move its bug tracking to
another system. For this we need to know which bugs are still valid
and which could be closed already. Thus we are setting older bugs to
"Incomplete" now.

If you still think this bug report here is valid, then please switch
the state back to "New" within the next 60 days, otherwise this report
will be marked as "Expired". Or please mark it as "Fix Released" if
the problem has been solved with a newer version of QEMU already.

Thank you and sorry for the inconvenience.


** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1770417

Title:
  Qemu can not parse long fqdns during drive-mirror

Status in QEMU:
  Incomplete
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  During migration of an openstack booted instance, I got the following
  error:

  Apr 12 10:55:22 cmp1 libvirtd[4133]: 2018-04-12 10:55:22.133+0000:
  4139: error : qemuMonitorJSONCheckError:392 : internal error: unable
  to execute QEMU command 'drive-mirror': error parsing address 'cmp0
  .sandriichenko-deploy-heat-virtual-mcp-pike-ovs-76.bud-mk.local:49153'

  A bit more info in libvirt bug
  https://bugzilla.redhat.com/show_bug.cgi?id=1568939

  To reproduce it with qemu only, I followed the guide at
  https://github.com/qemu/qemu/blob/master/docs/interop/live-block-
  operations.rst#id21. On dest and source compute nodes, I launched an
  instance:

  qemu-system-x86_64 -display none -nodefconfig -M q35 -nodefaults -m
  512 -blockdev node-name=node-
  TargetDisk,driver=qcow2,file.driver=file,file.node-
  name=file,file.filename=./test-instance-mirror.qcow2 -device virtio-
  blk,drive=node-TargetDisk,id=virtio0 -S -monitor stdio -qmp unix
  :./qmp-sock,server,nowait -incoming tcp:localhost:6666

  Then on dest node I launched nbd server:

  (qemu) nbd_server_start cmp0:49153
  (qemu) nbd_server_add -w node-TargetDisk

  On the source node:

  (qemu) drive_mirror -n  node-TargetDisk 
nbd:cmp0.vdrok-deploy-heat-virtual-mcp-pike-ovs-foobarbuzz.bud-mk.local:49153:exportname=node-TargetDisk
  error parsing address 
'cmp0.vdrok-deploy-heat-virtual-mcp-pike-ovs-foobarbuzz.bud-mk.local:49153'

  When using short host name instead of FQDN address seems to be parsed
  fine:

  (qemu) drive_mirror -n  node-TargetDisk 
nbd:cmp0:49153:exportname=node-TargetDisk qcow2
  Image is not in qcow2 format

  (not sure why it is not a qcow2 format, as I have qcow2 image with raw
  backing file, but this is unrelated)

  QEMU version is 2.11.1 from bionic

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