Re: [chrony-dev] Multihomed (multiple) network interfaces support !

[CpServiceSPb <cpservicespb@xxxxxxxxx>]

I use chronyd version 4.3 on Ubuntu 22.04 x64 LTS.

чт, 7 дек. 2023 г. в 00:33, CpServiceSPb <cpservicespb@xxxxxxxxx>:

I really don't understand how to specify the interface address for each instance.

Here are my config files:

conf.d/lan.conf

server lanIP port 11123 minpoll 0 maxpoll 0 copy
allow
bindcmdaddress /var/run/chrony/chronyd-server_lan.sock
cmdport 11323
pidfile /var/run/chrony/chronyd-server_lan.pid
driftfile /var/lib/chrony/drift-server_lan

conf.d/van.conf (not wan, but van)

server vanIP port 11123 minpoll 0 maxpoll 0 copy
allow
bindcmdaddress /var/run/chrony/chronyd-server_van.sock
cmdport 11323
pidfile /var/run/chrony/chronyd-server_van.pid
driftfile /var/lib/chrony/drift-server_van

I used a sent script.

Here is netstat -anupt | grep 123

udp        0      0 127..0.0.1:11123         0.0.0.0:*                           35124/chronyd
udp        0      0 vanIP:49629        van IP :11123      ESTABLISHED 35124/chronyd
udp        0      0 lanIP:56374         lanIP :11123        ESTABLISHED 35124/chronyd
udp        0      0 0.0.0.0:123             0.0.0.0:*                           35122/chronyd
udp        0      0 0.0.0.0:123             0.0.0.0:*                           35120/chronyd
udp        0      0 0.0.0.0:123             0.0.0.0:*                           35123/chronyd
udp        0      0 0.0.0.0:123             0.0.0.0:*                           35121/chronyd

Where is

udp        0      lanIP:123              0.0.0.0:*                           xxxxx/chronyd
udp        0      vanIP:123             0.0.0.0:*                           xxxxx/chronyd

And why are here

udp        0      0 0.0.0.0:123             0.0.0.0:*                           35121/chronyd

udp        0      0 0.0.0.0:123             0.0.0.0:*                           35121/chronyd

udp        0      0 0.0.0.0:123             0.0.0.0:*                           35121/chronyd

udp        0      0 0.0.0.0:123             0.0.0.0:*                           35121/chronyd

How chrony will know addresses to bind to ?

ср, 6 дек. 2023 г. в 11:25, Miroslav Lichvar <mlichvar@xxxxxxxxxx>:

On Wed, Dec 06, 2023 at 12:28:01AM +0300, CpServiceSPb wrote:
> Can you either post a link or detailed instruction on how to launch
> multiple chrony server instances for the same port but different
> interfaces/addresses ?

Here is an example:
https://chrony-project.org/faq.html#_can_ntp_server_be_separated_from_ntp_client

and a script:
https://gist.github.com/mlichvar/d2260423e2c5c3d83ec9608feaa749f1

You would just need to modify it to set different binddevice
for each server instance.

--
Miroslav Lichvar


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