[ovirt-users] Importing VM from Xen Server 6.5

Thu Aug 11 10:31:51 UTC 2016

On 11.08.16 14:14, Anantha Raghava wrote:
> Hi,
> 
> Tested this with different combinations:
> 
> a. from VDSM host, both "ssh root at 192.168.1.40" and "sudo -u vdsm ssh
> root at 192.168.1.40" commands are logging in without asking for password and I
> can run all xe commands without any glitch without modifications to default
> xen server firewall or SELinux rules.
> 
> b. With firewall enabled and SELinux set to enforcing or permissive or
> disabled, I run "virsh -c ssh://root@192.168.1.40". And the command is
> resulting in two errors:
> 
>     error: filed to connect to the hypervisor
>     error: unable to connect to the server at '192.168.1.40:16514' : No
> route to the host.
> 
> c. With firewall disabled and SELinux set to Enforcing or permissive or
> disabled, I run "virsh -c ssh://192.168.1.40". And the command is resulting
> in two errors
> 
> error: filed to connect to the hypervisor
>     error: unable to connect to the server at '192.168.1.40:16514' :
> Connection refused
Good tests,
We need to figure out why libvirt refuse the connection,
try to debug virsh by running:

$ export LIBVIRT_LOG_OUTPUTS="1:file:/tmp/libvirt_client.log"
$ export LIBVIRT_DEBUG=1
$ virsh -c virsh -c ssh://192.168.1.40

and examing /tmp/libvirt_client.log file

> 
> -- 
> 
> Thanks & Regards,
> 
> 
> Anantha Raghava
> 
> eXza Technology Consulting & Services
> 
> Ph: +91-9538849179, E-mail: raghav at exzatechconsulting.com
> <mailto:raghav at exzatechconsulting.com>
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> On Thursday 11 August 2016 12:20 PM, Shahar Havivi wrote:
> > On 10.08.16 19:40, Anantha Raghava wrote:
> > > Hello Richard / Shahar,
> > > 
> > > I installed and enabled nc on Xen Server host. Now the " ...... sh: nc:
> > > command not found: Input/output error" is gone. Communication is
> > > established. However I am still getting two specific errors:
> > > 
> > > VDSM ovirt_engine command failed: End of file while reading data: :
> > > Input/Output error
> > > 
> > > &
> > > 
> > > Failed to retrieve VMs Information from the external server
> > > xen+ssh://root@192.168.1.40
> > > 
> > > I am receiving the same error when I run virsh -c
> > > xen+ssh://root@192.168.1.40
> > > 
> > > Screen shot is attached for quick reference.
> > > 
> > > Is it something to do with firewall / ip tables on xen server or libvirtd
> > > host?
> > Hi,
> > You don't need to try it on oVirt when 'virsh -c' doesn't work since oVirt try
> > to connect via libvirt libraries (same as virsh) before it called virt-v2v.
> > 
> > Did you follow all the steps in the wiki?
> > Are you able to ssh to the Xen server from the vdsm machine that you try to
> > run virsh without password? (ssh root at 192.168.1.40)
> > 
> > > -- 
> > > 
> > > Thanks & Regards,
> > > 
> > > Anantha Raghava
> > > 
> > > 
> > > Do not print this e-mail unless required. Save Paper & trees.
> > > 
> > > On Wednesday 10 August 2016 06:04 PM, Anantha Raghava wrote:
> > > > Hi,
> > > > 
> > > > Let me try this and post the results here.
> > > > 
> > > > Regards,
> > > > Ananth
> > > > 
> > > > On 10 Aug 2016 15:28, "Richard W.M. Jones" <rjones at redhat.com
> > > > <mailto:rjones at redhat.com>> wrote:
> > > > 
> > > >      On Wed, Aug 10, 2016 at 09:45:52AM +0300, Shahar Havivi wrote:
> > > >      > On 10.08.16 06:45, Anantha Raghava wrote:
> > > >      > > Hi,
> > > >      > >
> > > >      > > I even attempted to run command virsh -c
> > > >      xen+ssh://root@xenhost and I get
> > > >      > > error "/*error: End of file reading data: sh: nc: command not
> > > >      found:
> > > >      > > Input/output error"*/
> > > >      > First you need to be able to login via virsh (before trying to
> > > >      import via
> > > >      > oVirt).
> > > >      >
> > > >      > I never encounter this error before,
> > > >      > I guess that nc is netcat...,
> > > >      > try to install nmap-ncat:
> > > >      > $ dnf info nmap-ncat
> > > >      >
> > > >      > Adding Richard which may have more input.
> > > > 
> > > >      Yes, you need to install 'nc' on the *target* (Xen) machine.
> > > > 
> > > >      This is because libvirt's ssh transport uses nc:
> > > >      https://libvirt.org/guide/html/Application_Development_Guide-Architecture-Transports.html
> > > >      <https://libvirt.org/guide/html/Application_Development_Guide-Architecture-Transports.html>
> > > > 
> > > >      Rich.
> > > > 
> > > >      --
> > > >      Richard Jones, Virtualization Group, Red Hat
> > > >      http://people.redhat.com/~rjones <http://people.redhat.com/%7Erjones>
> > > >      Read my programming and virtualization blog: http://rwmj.wordpress.com
> > > >      virt-builder quickly builds VMs from scratch
> > > >      http://libguestfs.org/virt-builder.1.html
> > > >      <http://libguestfs.org/virt-builder.1.html>
> > > > 
> > 
>