Arch Linux

meijin

Member

From: Israel

Registered: 2009-03-05

Posts: 100

[Solved] Libvirt networking and systemd-reosolved instead of dnsmasq

I am trying to use `virt-manager` and create a new VM, based on QEMU/KVM, which fails with

Unable to complete install: 'Requested operation is not valid: network 'default' is not active'

As far as I understood from looking around, the problem is that I need to have `dnsmasq` installed and running. But when I am trying to start

dnsmasqd.service

it is unable to start with the following error (from `journalctl -xeu dnsmasq.service`):

Aug 01 14:53:27 Sapir-i7 dnsmasq[209126]: dnsmasq: syntax check OK.
Aug 01 14:53:27 Sapir-i7 dnsmasq[209127]: dnsmasq: failed to create listening socket for port 53: Address already in use
Aug 01 14:53:27 Sapir-i7 dnsmasq[209127]: failed to create listening socket for port 53: Address already in use
Aug 01 14:53:27 Sapir-i7 dnsmasq[209127]: FAILED to start up

I guess this is because I use

systemd-resolved`

as my DNS/DHCP resolver.
Is there any way to bypass that, besides not using `systemd-resolved`?

Last edited by meijin (2024-08-02 06:01:36)

cryptearth

Member

Registered: 2024-02-03

Posts: 1,150

Re: [Solved] Libvirt networking and systemd-reosolved instead of dnsmasq

an option could be to use a network-bridge instead of nat

Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 13,146

Re: [Solved] Libvirt networking and systemd-reosolved instead of dnsmasq

If the default network cannot be started, make sure iptables-nft and dnsmasq are installed.

Arte both those programs installed ?

---

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

meijin

Member

From: Israel

Registered: 2009-03-05

Posts: 100

Re: [Solved] Libvirt networking and systemd-reosolved instead of dnsmasq

If the default network cannot be started, make sure iptables-nft and dnsmasq are installed.

Arte both those programs installed ?

both are installed, but as I wrote I can't start the dnsmasq service.

meijin

Member

From: Israel

Registered: 2009-03-05

Posts: 100

Re: [Solved] Libvirt networking and systemd-reosolved instead of dnsmasq

I also see it's written:

libvirt handles DHCP and DNS with dnsmasq, launching a separate instance for every virtual network. It also adds iptables rules for proper routing, and enables the ip_forward kernel parameter. This also means that having dnsmasq running on the host system is not necessary to support libvirt requirements (and could interfere with libvirt dnsmasq instances).p

meijin

Member

From: Israel

Registered: 2009-03-05

Posts: 100

Re: [Solved] Libvirt networking and systemd-reosolved instead of dnsmasq

so restarting the machine seems to have some progress, and this error is not longer shown.