Re: Virtualisation: Network problems

[Chris Keschnat]

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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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