Virt-manager: Difference between revisions

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=== Networking ===

To use the default libvirt network, you will need to install the <code>dnsmasq</code> package. This is required for DNS and DCHP functionality within the network:

{{File|3=environment.systemPackages = with pkgs; [

dnsmasq

];|name=/etc/nixos/configuration.nix|lang=nix}}

The default network starts off inactive, you must enable it before it is accessible. This can be done by running the following command: <syntaxhighlight lang="console"># virsh net-start default</syntaxhighlight>And if you would like to enable it automatically at boot:<syntaxhighlight lang="console">

# virsh net-autostart default

</syntaxhighlight>By default, this will enable a virtual network bridge under the name <code>virbr0</code>.

</syntaxhighlight>By default, this will enable a virtual network bridge under the name <code>virbr0</code>. You may need to allow it through your firewall filter like so:

{{File|3=networking.firewall.trustedInterfaces = [ "virbr0" ];|name=/etc/nixos/configuration.nix|lang=nix}}

=== Display ===

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Line 66:

name = "Vanilla-DMZ";

};

== Troubleshooting ==

=== Unable to find 'efi' firmware ===

The following guide is to fix the following error which will occur when starting a virtual machine after NixOS upgrade:

<code>Error: Error starting domain: operation failed: Unable to find 'efi' firmware that is compatible with the current configuration</code>

Solution:

# Delete old generations: <code>nix-collect-garbage -d</code>

# Find where the EFI boot loaded file is located: <code>find /nix/store/ -maxdepth 1 -type d -name "*qemu*" | xargs -I {} find "{}" -type f -name "edk2-x86_64-secure-code.fd"</code> Find the dir holding the latest qemu. The directory should be something like: <code>xbfjilai721rzd9rf9dhhpv03xza4xp4-qemu-9.1.3</code>. Take a note of this directory name.

# Open VM in virt-manager, go to XML and within the <code><os ...></code> tag:

## Edit <code><loader ...></code> with the above directory name

## Edit <code><nvram ...></code> with the above directory name.

[[Category:Virtualization]]

@@ Line 18: / Line 18: @@
 === Networking ===
+To use the default libvirt network, you will need to install the <code>dnsmasq</code> package. This is required for DNS and DCHP functionality within the network:
+{{File|3=environment.systemPackages = with pkgs; [
+  dnsmasq
+];|name=/etc/nixos/configuration.nix|lang=nix}}
 The default network starts off inactive, you must enable it before it is accessible. This can be done by running the following command: <syntaxhighlight lang="console"># virsh net-start default</syntaxhighlight>And if you would like to enable it automatically at boot:<syntaxhighlight lang="console">
 # virsh net-autostart default
-</syntaxhighlight>By default, this will enable a virtual network bridge under the name <code>virbr0</code>.
+</syntaxhighlight>By default, this will enable a virtual network bridge under the name <code>virbr0</code>. You may need to allow it through your firewall filter like so:
+{{File|3=networking.firewall.trustedInterfaces = [ "virbr0" ];|name=/etc/nixos/configuration.nix|lang=nix}}
 === Display ===
@@ Line 59: / Line 66: @@
       name = "Vanilla-DMZ";
    };
+== Troubleshooting ==
+=== Unable to find 'efi' firmware ===
+The following guide is to fix the following error which will occur when starting a virtual machine after NixOS upgrade:
+<code>Error:  Error starting domain: operation failed: Unable to find 'efi' firmware that is compatible with the current configuration</code>
+Solution:
+# Delete old generations:  <code>nix-collect-garbage -d</code>
+# Find where the EFI boot loaded file is located:  <code>find /nix/store/ -maxdepth 1 -type d -name "*qemu*"  |  xargs -I {} find "{}" -type f -name "edk2-x86_64-secure-code.fd"</code>  Find the dir holding the latest qemu.  The directory should be something like: <code>xbfjilai721rzd9rf9dhhpv03xza4xp4-qemu-9.1.3</code>.  Take a note of this directory name.
+# Open VM in virt-manager, go to XML and within the <code><os ...></code> tag:
+## Edit <code><loader ...></code> with the above directory name
+## Edit <code><nvram ...></code> with the above directory name.
 [[Category:Virtualization]]