[systemd-devel] How to log to journald using fifo?

[Mantas Mikulėnas]

On Sun, Apr 10, 2016 at 1:57 PM, Samuel Williams <
space.ship.traveller at gmail.com> wrote:

> Hello,
>
>
> I've been trying to figure out the best way to support legacy applications
> that don't support syslog for logging. The best we can do, I think, is to
> use fifo and have another process read the fifo to journald.
>
>
> I made the following unit journald-fifo at .service
>
>
> [Unit]
>
> Description=A fifo for logging to journald
>
> AssertPathExists=/var/log/%i.fifo
>
>
> [Service]
>
> Type=simple
>
> ExecStart=/bin/sh -c 'while true; do systemd-cat -t %i < /var/log/%i.fifo;
> done'
>
> Nice=5
>
>
> [Install]
>
> WantedBy=multi-user.target
>
> I was wondering is this a good approach? Is there a better way? (of
> course, we'd like to fix the original software to work better).
>

If the software can log to stdout/stderr, just use that. If not, make it
write logs to "/dev/stderr". Either way, systemd will log service stdout
automatically.

-- 
Mantas Mikulėnas <grawity at gmail.com>
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