Re: Virtualisation: Network problems

[Gottfried <gottfried@posteo.de>]

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Hi Chris,

thanks for your answer

  does:
> ~sudo virsh net-list~ show a network? 

yes, it shows a network: ("ja" means yes)

gfp@Tuxedo ~$ sudo virsh net-list
  Name      Status   Automatischer Start   Bleibend
----------------------------------------------------
  network   Aktiv    ja                    ja


Gottfried



----------------------------------------------------
From: Chris Keschnat <chris@catsu.it>
To: help-guix@gnu.org
Subject: Re: Virtualisation: Network problems
Message-ID: <8635celpyy.fsf@catsu.it>
Content-Type: text/plain; charset=utf-8


Gottfried <gottfried@posteo.de> writes:

 > [[PGP Signed Part:Undecided]]
 > Hi Guixers,
 >
 > Basic details of my Virtualisation setup:
 >
 > Name: QEUMU/KVM
 > Libvirt URL: qemu:///System
 > Autoconnect yes
 > -------------------------------------
 > Network selection
 > It gives me 3 options:
 >
 > 1. I added a virtual network
 >   Name: network
 >   Device: virbr0 is there
 >   IPv4 configuration is there
 >
 > Details:
 >
 > <network>
 >   <name>network</name>
 >   <uuid>e324aabf-6ad4-4407-9028-82c96be96e0c</uuid>
 >   <forward mode="nat">
 >     <nat>
 >       <port start="1024" end="65535"/>
 >     </nat>
 >   </forward>
 >   <bridge name="virbr0" stp="on" delay="0"/>
 >   <mac address="52:54:00:16:e9:74"/>
 >   <domain name="network"/>
 >   <ip address="192.168.100.1" netmask="255.255.255.0">
 >     <dhcp>
 >       <range start="192.168.100.128" end="192.168.100.254"/>
 >     </dhcp>
 >   </ip>
 > </network>
 >
 > 2. Bridge device
 > 3. Macvtap device
 >
 > I guess the 1. option is the one I need. May be I made a mistake in
 > adding a virtual network
 > -------------------------------------------------------------------
 >
 > When I want to set up the QEMU/KVM network connection for the VM
 > and I want to run the last step(the 5/5 step) of installing an iso
 > it says:
 >
 > Installation konnte nicht fertiggestellt werden/
 > Installation could not be completed:
 > Failed connect socket to
 > '/var/run/libvirt/virtlogd-sock':
 > No such file or directory
 > -------------------------------------------------------------------
 > Installation konnte nicht fertiggestellt werden: «Failed to connect
 > socket to '/var/run/libvirt/virtlogd-sock': No such file or directory»
 >
 > Traceback (most recent call last):
 >   File
 > 
"/gnu/store/n3gyjzsylh2abc3ykxz9kf5335azgacr-virt-manager-3.2.0/share/virt-manager/virtManager/asyncjob.py",
 >   line 65, in cb_wrapper
 >     callback(asyncjob, *args, **kwargs)
 >   File
 > 
"/gnu/store/n3gyjzsylh2abc3ykxz9kf5335azgacr-virt-manager-3.2.0/share/virt-manager/virtManager/createvm.py",
 >   line 2001, in _do_async_install
 >     installer.start_install(guest, meter=meter)
 >   File
 > 
"/gnu/store/n3gyjzsylh2abc3ykxz9kf5335azgacr-virt-manager-3.2.0/share/virt-manager/virtinst/install/installer.py",
 >   line 701, in start_install
 >     domain = self._create_guest(
 >   File
 > 
"/gnu/store/n3gyjzsylh2abc3ykxz9kf5335azgacr-virt-manager-3.2.0/share/virt-manager/virtinst/install/installer.py",
 >   line 649, in _create_guest
 >     domain = self.conn.createXML(install_xml or final_xml, 0)
 >   File
 > 
"/gnu/store/anh3nz3qr46f0ds5i1pswisrc9s3cf3f-python-libvirt-8.6.0/lib/python3.9/site-packages/libvirt.py",
 >   line 4442, in createXML
 >     raise libvirtError('virDomainCreateXML() failed')
 > libvirt.libvirtError: Failed to connect socket to
 > '/var/run/libvirt/virtlogd-sock': No such file or directory
 > --------------------------------------------------------------------
 >
 >
 > But running the last step:
 >
 > Failed to find a suitable default network
 > -----------------------------------------------
 >
 > What are the problems here?
 > Any suggestions?
 >
 > Gottfried
 >
 > [2. OpenPGP public key --- application/pgp-keys; 
OpenPGP_0x61FAF349C9FB7F94.asc]...
 >
 > [[End of PGP Signed Part]]
-------------------------------------------------------------------------------
Hello,
does ~sudo virsh net-list~ show a network? I remember having some issues 
which I never solved "the guix way", only
manually.

If virsh doesn't show a network, you can try (locate a
=default.xml= on your machine):

#+begin_src sh

   sudo virsh net-define 
/gnu/store/47s1cs65izld791m38aa461s02q5ngb7-libvirt-8.6.0/etc/libvirt/qemu/networks/default.xml
   sudo virsh net-autostart default
   sudo virsh net-start default

#+end_src

Obviously I would prefer a cleaner way, but I haven't looked further
into this yet. If anyone knows the answer, I would appreciate it.

PS: Just for completeness, the =default.xml= looks like this:

#+begin_src conf

   <network>
     <name>default</name>
     <bridge name='virbr0'/>
     <forward/>
     <ip address='192.168.122.1' netmask='255.255.255.0'>
       <dhcp>
         <range start='192.168.122.2' end='192.168.122.254'/>
       </dhcp>
     </ip>
   </network>

#+end_src

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