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[libvirt] error: internal error canonical hostname pointed to localhost, but this is not allowed




When trying to migrate a VM the destination libvirtd
virGetHostnameLocalhost throws an internal error.

I issue this command from the source host.
> virsh migrate rel-vm1 qemu+tls://croton/system
error: internal error canonical hostname pointed to localhost, but this is
not allowed

The destination host throws the error:
14:14:57.914: debug : virDomainMigratePrepare2:3740 : dconn=0xed17e0,
cookie=0x7f983a352d68, cookielen=0x7f983a352d74, uri_in=(null),
uri_out=0xe8c360,flags=0, dname=(null), bandwidth=0, dom_xml=<domain
type='kvm' id='1'>
  <name>rel-vm1</name>
  <uuid>c0c98fc9-8cd6-e246-a06e-b5ce37c4f05e</uuid>
  <memory>262144</memory>
  <currentMemory>262144</currentMemory>
  <vcpu>1</vcpu>
  <os>
    <type arch='x86_64' machine='pc-0.11'>hvm</type>
    <boot dev='hd'/>
  </os>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <source file='/share/images/nagin/rel-vm1/rel-vm1.img'/>
      <target dev='hda' bus='ide'/>
      <alias name='ide0-0-0'/>
      <address type='drive' controller='0' bus='0' unit='0'/>
    </disk>
    <controller type='ide' index='0'>
      <alias name='ide0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x1'/>
    </controller>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='5900' autoport='yes'/>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
    </video>
  </devices>
</domain>

14:14:57.914: error : virGetHostnameLocalhost:2372 : internal error
canonical hostname pointed to localhost, but this is not allowed
libvir: error : internal error canonical hostname pointed to localhost, but
this is not allowed
14:14:57.914: debug : remoteSerializeError:141 : prog=536903814 ver=1
proc=108 type=1 serial=3, msg=internal error canonical hostname pointed to
localhost, but this is not allowed

The libvirt version is the tip of git:
[root croton rel-vm1]# virsh version
Compiled against library: libvir 0.7.7
Using library: libvir 0.7.7
Using API: QEMU 0.7.7
Running hypervisor: QEMU 0.12.1

Changing qemudDomainMigratePrepare2 call  to virGetHostnameLocalhost
from: if ((hostname = virGetHostnameLocalhost(0)) == NULL)
to: if ((hostname = virGetHostnameLocalhost(1)) == NULL)
seems to fix the problem.
But maybe this is only masking a another problem.


--Kenneth Nagin





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