[SR-Users] systemd kamailio.service - RFC Wants=network-online.target

[Sergey Safarov]

Also you may want change
Restart=on-failure

вт, 6 нояб. 2018 г. в 14:54, Kevin Olbrich <ko at sv01.de>:

> Hi!
>
> The systemd kamailio.service file for debian (in my case, it's stretch)
> has the following unit options set:
>
> [Unit]
>> Description=Kamailio (OpenSER) - the Open Source SIP Server
>> After=network.target
>
>
> It would be better to change this to:
>
> [Unit]
>> Description=Kamailio (OpenSER) - the Open Source SIP Server
>> Wants=network-online.target
>> After=network-online.target
>
>
> Why? With network.target the service starts as soon as the network setup
> is started, not explicitly after configuring (=IP) it [1].
> This creates a race condition on very fast hardware like mine (booting
> incl. all services takes 10s).
>
> Even with static IPs, kamailio often fails directly at boot because eth1
> (connection to DB cluster) is not up.
> [I have never met this problem on systems which ran on HDDs.]
>
> Setting "network-online.target" as Wants + After makes sure, Kamailio is
> started after all interfaces are ready to serve.
>
> Units that strictly require a configured network connection should pull in
>> network-online.target (via a Wants= type dependency) and order
>> themselves after it. This target unit is intended to pull in a service that
>> delays further execution until the network is sufficiently set up. What
>> precisely this requires is left to the implementation of the network
>> managing service.
>
>
> Perfect example for this is the Shorewall package (firewall solution):
>
> [Unit]
>> Description=Shorewall IPv4 firewall
>> Wants=network-online.target
>> After=network-online.target
>> Conflicts=iptables.service firewalld.service
>
>
> RFC
>
> Kind regards
> Kevin
>
> [1] https://www.freedesktop.org/software/systemd/man/systemd.special.html
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