Re: dnsmasq dhcp failure

14.10.2022 01:24, Erich Titl пишет:
> Hi Folks
>
> Am 13.10.2022 um 22:12 schrieb Andrew:
>> 13.10.2022 20:16, Steve Tell пишет:
>>>
>>> ...
>>>
>>> A mechanism to automaticly restart daemons that exit would be nice. 
>>> But its not worth converting to systemd just for that - or at least 
>>> I'm not offering to do the work :-) 
>
> I am not even sure how systemd could detect such a failure.
>
>>
>>
>> there's monit in packages for that purpose
>
> When using monit, how can monit detect that dnsmasq is not responding 
> to dhcp requests as the process appears to still be running, maybe not 
> running completely. So one would have to write something that detects 
> the non functionality. I have not found anything in the logs that 
> would suggest such a failure. It just appears as if the dhcp requests 
> are dropped, not in iptables but just like it gets digested inside 
> dnsmasq and not reacted to.
>
> It would be different if this was the DNS caching part of dnsmasq. But 
> then, to be honest, I hasve not even looked at this as a client 
> becomes nonfunctional if it cannot get an IP address.
>
> cheers
>
> ET 
monit can run external command or script. for ex., something like 'ip 
n|grep 192\.168\.0 | wc -l' (but it needs to have at least 1 client 
active), or compare iptables packes counter for 2 rules (input/output) 
for DHCP.


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