[SR-Users] systemd - properly starting up rtpengine with kernel forwarding

[Daniel-Constantin Mierla]

Nice to hear about oneshot systemd service type, thanks!

So this should executed only once, before the start of rtpengine
service. Does it require to put something in rtpengine.service file
(like after run after service)? Or systemd figures it out by itself?

Cheers,
Daniel

On 17.01.20 15:30, Sergey Safarov wrote:
> Systemd seems to have the "ExecStartPre" option, is it what people use
> to ensure the rtpengine kernel module is loaded and iptables rule exists?
>
> yes, that is option
> But this command will be executed for Every daemon start.
>
> Any systemd-specific wayt to run a script only once after system boot? I
> have seen workarounds on the net for creating like a rc.local service,
> but they didn't look to be systemd-native
>
> I can recommend create dedicated systemd unit file
> "prepare-rtpengine.service"
> Like this
>
> [Unit]
> Description=prepare rpengine
>
> [Service]
> Type=oneshot
> RemainAfterExit=yes
> ExecStartPre=/usr/sbin/modprobe xt_RTPENGINE
> ExecStart=/usr/sbin/iptables -I INPUT -p udp -j RTPENGINE --id 0
> ExecStartPost=ip6tables -I INPUT -p udp -j RTPENGINE --id 0
> StandardOutput=syslog
> StandardError=syslog
>
> [Install]
> RequiredBy=rtpengine.service
> WantedBy=basic.target
>
> and then
> systemctl enable prepare-rtpengine.service
>
> This will create dependency that will be execute one tme before
> rtpengine daemon started.
>
>
> On Fri, Jan 17, 2020 at 5:03 PM Daniel-Constantin Mierla
> <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>
>     Hello,
>
>     do people here have (implemented) special ways to properly start
>     rtpengine with kernel forwarding after system reboot?
>
>     From rtpengine readme:
>
>     """
>
>     A typical start-up sequence including in-kernel forwarding might look
>     like this:
>
>     # this only needs to be one once after system (re-) boot
>     modprobe xt_RTPENGINE
>     iptables -I INPUT -p udp -j RTPENGINE --id 0
>     ip6tables -I INPUT -p udp -j RTPENGINE --id 0
>
>     # ensure that the table we want to use doesn't exist - usually needed
>     after a daemon
>     # restart, otherwise will error
>     echo 'del 0' > /proc/rtpengine/control
>
>     # start daemon
>     /usr/sbin/rtpengine --table=0 --interface=10.64.73.31
>     --interface=2001:db8::4f3:3d \
>     --listen-ng=127.0.0.1:2223 <http://127.0.0.1:2223> --tos=184
>     --pidfile=/run/rtpengine.pid
>     --no-fallback
>
>     """
>
>     I was relying on shell scripts executed on boot time, but now that
>     systemd is more common, I am looking to see what are
>     "standard"/"recommended" ways for running additional scripts
>     besides the
>     start/stop daemon, which makes it also easier to build packages not
>     worrying about the type of OS and how it can run scripts at startup.
>
>     Systemd seems to have the "ExecStartPre" option, is it what people use
>     to ensure the rtpengine kernel module is loaded and iptables rule
>     exists?
>
>     Any systemd-specific wayt to run a script only once after system
>     boot? I
>     have seen workarounds on the net for creating like a rc.local service,
>     but they didn't look to be systemd-native, ...
>
>     Not strictly related, but if someone is aware or had some experiences
>     with,  I am curious if "echo 'del 0' > /proc/rtpengine/control" is
>     really needed because on a system where I forgot to have it in the
>     scripts (well, was commented), I haven't noticed any issues after
>     rtpengine restarts.
>
>     Cheers,
>     Daniel
>
>     -- 
>     Daniel-Constantin Mierla -- www.asipto.com <http://www.asipto.com>
>     www.twitter.com/miconda <http://www.twitter.com/miconda> --
>     www.linkedin.com/in/miconda <http://www.linkedin.com/in/miconda>
>     Kamailio World Conference - April 27-29, 2020, in Berlin --
>     www.kamailioworld.com <http://www.kamailioworld.com>
>
>
>     _______________________________________________
>     Kamailio (SER) - Users Mailing List
>     sr-users at lists.kamailio.org <mailto:sr-users at lists.kamailio.org>
>     https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio World Conference - April 27-29, 2020, in Berlin -- www.kamailioworld.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20200117/6b842ff6/attachment.html>