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equaeghe
l33t
Joined: 22 Feb 2005
Posts: 637
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 Posted: Tue May 09, 2023 11:52 am Post subject: [solved] Can systemd-resolved replace avahi? |
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Recently, I've noticed the following warning in my logs:
| Code: | | avahi-daemon[655]: *** WARNING: Detected another IPv4 mDNS stack running on this host. This makes mDNS unreliable and is thus not recommended. *** |
It seems I have both avahi and systemd-resolved running (as mDNS stacks). I recall that avahi used to be the only option for mdns/zeroconf, but apparently systemd-resolved has some support.
Is it possible to replace avahi by systemd-resolved?
It seems some packages need it when setting their zeroconf flag:
| Code: | # emerge -c avahi --verbose
Calculating dependencies... done!
net-dns/avahi-0.8-r7 pulled in by:
kde-frameworks/kdnssd-5.104.0 requires net-dns/avahi[mdnsresponder-compat]
media-video/pipewire-0.3.67 requires net-dns/avahi
media-video/vlc-3.0.18 requires net-dns/avahi[dbus]
net-fs/samba-4.16.9 requires net-dns/avahi[dbus]
net-print/cups-2.4.2-r7 requires >=net-dns/avahi-0.6.31-r2[dbus,abi_x86_64(-)]
net-print/cups-filters-1.28.17 requires net-dns/avahi[dbus]
sys-auth/nss-mdns-0.15.1 requires >=net-dns/avahi-0.6.31-r2[abi_x86_64(-)] |
(Only the last package, nss-mdns does not conditionally depend on avahi; I think I can live without it.)
Now I'm wondering whether systemd-resolved can replace avahi for my use case, which is essentially easier printer discovery when I'm visiting someone else. Is this possible?
If not, I guess I should disable systemd-resolved's mdns stack?
Last edited by equaeghe on Tue May 09, 2023 7:35 pm; edited 1 time in total |
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rab0171610
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Joined: 24 Dec 2022
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szatox
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Joined: 27 Aug 2013
Posts: 3131
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| Posted: Tue May 09, 2023 6:30 pm Post subject: |
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| Quote: | | Is it possible to replace avahi by systemd-resolved? |
Avahi does much more than just mdns, so probably no.
| Quote: | | If not, I guess I should disable systemd-resolved's mdns stack? |
Systemd-resolved can't even do it's own job (caching dns responses) properly, so I'd suggest you disable and mask it. And install dnsmasq if you do want to have a dns cache on your machine. If, because you can live without it, and in many cases either won't see a difference or have a better alternative, like a site-local cache for all machines on your network. E.g. SOHO routers often come with DNS relay by default. |
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equaeghe
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Joined: 22 Feb 2005
Posts: 637
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| Posted: Tue May 09, 2023 7:35 pm Post subject: |
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| rab0171610 wrote: | | You can do your own research and decide what is best for you, but IMO you should just use avahi for mDNS. […] |
Thanks for the input! I decided to follow your advice. |
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