Re: Per-user service managers

[Jameson Graef Rollins <jrollins@finestructure.net>]

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On Thu, 20 Oct 2011 10:26:17 -0600, Mike Buland <xagafinelle@gmail.com> wrote:
> I wrote this little program that manages per-user runsv instances.
> For each user in the "svusers" group it starts a service manager in
> their ~/.sv directory.  The service manager runs as that user, so as
> long as they can run the sv program, they can manage their own
> services.
>
> Per-user service managers run independently of user logins.
>
> I've released this under the BSD license, and it's available on github.
>
> https://github.com/eichlan/usersv

Hey, Mike.  Very cool!  I actually wrote basically the exact same thing
a while ago, but never got around to publishing it.  I think this sort
of thing can be very useful.  Thanks for sharing.

I see that your system uses a single process that spawns a runsvdir for
each user.  The problem I see with that is that it's hard to
individually control the user runsvdir processes.  If you do have an
idea about how to control (ie. start/stop/restart/etc.) the user
runsvdir processes I would be interested in hearing it.

The system I put together uses a separate runsv dir for each user, and
the entire system is basically encapsulated in the runsv run script (and
log/run script), which I've pasted in below.  The env dir for this
particular example is as follows:

HOME=/home/jrollins
LOG=/home/jrollins/.service.log
PATH=/usr/local/bin:/usr/local/sbin:/bin:/sbin:/usr/bin:/usr/sbin
RUNSVDIR=/home/jrollins/.service
USER=jrollins

Anyway, just thought you might be interested, and thanks again for
sharing your work.

jamie.


servo 0$ cat /etc/sv/runsvdir-jrollins/run
#!/bin/sh
exec 2>&1
USER=`head env/USER`
RUNSVDIR=`head env/RUNSVDIR`
GROUPS=$(groups "$USER" | cut -d: -f2 | tr ' ' ':')
echo "${USER}${GROUPS}"
until [ -d "$RUNSVDIR" ] ; do
    sleep 10
done
if [ -d log/main ] ; then
    exec chpst -u "${USER}${GROUPS}" -e env \
	runsvdir -P "$RUNSVDIR"
else
    exec chpst -u "${USER}${GROUPS}" -e env \
	runsvdir -P "$RUNSVDIR" 'log: ...........................................................................................................................................................................................................................................................................................................................................................................................................'
fi

servo 0$ cat /etc/sv/runsvdir-jrollins/log/run
#!/bin/sh
set -e
LOG=`readlink -f ./main`
USER=`head ../env/USER`
if ! [ -d "$LOG" ] ; then
    mkdir -p -m0750 "$LOG"
    chown "$USER":"$USER" "$LOG"
fi
exec chpst -u "$USER" svlogd -tt "$LOG"

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