Arch Linux

jlesquembre

Member

Registered: 2012-11-10

Posts: 5

Systemd service, make it response to network changes

I'm using netctl and I'm trying to make my own service. The idea is that my service is restarted if I do a

systemctl restart netctl@net0

or if I unplug and plug again the network cable with the service netctl-ifplugd@net0 enabled. First case is easy, but I don't find a solution for both cases, any suggestions?

teckk

Member

Registered: 2013-02-21

Posts: 519

Re: Systemd service, make it response to network changes

I don't understand what you are trying to do.

I'm using netctl

https://wiki.archlinux.org/index.php/netctl

Do you want

netctl stop mynetwork
netctl start mynetwork

jlesquembre

Member

Registered: 2012-11-10

Posts: 5

Re: Systemd service, make it response to network changes

I wrote service like this:

[Unit]
Description=Service on interface %I
Wants=docker.service

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/lib/project/my_script.sh start %I
ExecStop=/usr/lib/project/my_script.sh stop %I

[Install]
WantedBy=multi-user.target

What I want is restart this service if I do a restart of the network, with 'netctl restart mynetwork' or automatically via the 'netctl-ifplugd@mynetwork' service. Ideally my service restart would be independent from netctl and only dependent of the network interface.

firecat53

Member

From: Lake Stevens, WA, USA

Registered: 2007-05-14

Posts: 1,542

Website

Re: Systemd service, make it response to network changes

Try changing your service under [Unit] to:

[Unit]
Description=Service on interface %I
Wants=docker.service
PartOf=netctl-ifplugd@mynetwork.service

See 'man systemd.unit' for more info on the PartOf directive. I _think_ that's what you might be trying to do

Scott

Last edited by firecat53 (2014-10-03 15:26:32)

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jlesquembre

Member

Registered: 2012-11-10

Posts: 5

Re: Systemd service, make it response to network changes

@firecat53, thanks for the info about the PartOf directive, I didn't know it and is really useful. But doesn't help in this case, service netctl-ifplugd watchs the interface for changes, but never restart itself. If I unplug and plug the network cable, the network is restarted, but not the service itself, and my service is not restarted.