Hi all,
Laurent has suggested i ask on IRC about this, but since (a) i'm
in UTC+10, (b) i'm constantly moving between a few different
networks, and (c) my bouncer is currently out of action (it's a
Story), i thought i'd ask on these lists instead, to facilitate
asynchronous replies. :-)
When i was on Void, a few years ago, i used s6+66 in place of
runit. Since moving to Gentoo, i've been using OpenRC.
OpenRC currently doesn't have user services. They're gradually
being worked on:
https://github.com/OpenRC/openrc/pull/573
but the current state of things is that the contributor is
rewriting the PR:
https://github.com/OpenRC/openrc/pull/573#issuecomment-2007766162
i've had a lot on my plate for a while, but in more recent times
i've had a bit more space to faff around with lower-priority
stuff, and so i'm exploring setting up s6-rc to manage the user
services i need. Once i've done so, i can:
* write a guide on the Gentoo wiki[a]; and
* provide service definitions for others to use via my personal
overlay[b].
which might help more people to become familiar with the s6
ecosystem in general, and with s6-rc in particular (rather than
trying to use s6 for service management as well as supervision).
However, i've reached an impasse, and i'm hoping some can tell me
what i'm missing / what i'm doing wrong / what i'm
misunderstanding.
Here's the situation:
*
S6RC_SERVICE_REPO=${HOME}/src/srht/gentoo-overlay/sys-apps/s6-rc-services/files/
* The above directory contains two service directories:
** dbus-session-bus/, containing:
*** type: longrun
*** notification-fd: 3
*** producer-for: dbus-session-bus-log
*** run:
#!/usr/bin/execlineb -P
importas HOME HOME
redirfd -w 4 ${HOME}/.env.d/DBUS_SESSION_BUS_ADDRESS
dbus-daemon --session --fork --nopidfile --print-address=4
*** finish:
#!/usr/bin/execlineb -P
importas HOME HOME
rm -f ${HOME}/.env.d/DBUS_SESSION_BUS_ADDRESS
** dbus-session-bus-log/, containing:
*** type: longrun
*** notification-fd: 3
*** consumer-for: dbus-session-bus
*** pipeline-name: dbus-session-bus-pipeline
*** run:
#!/usr/bin/execlineb -P
importas HOME HOME
exec -c
s6-log -d3 -- t ${HOME}/.logs/s6-rc-services/dbus-session-bus
* SCANDIR="${XDG_DATA_HOME}/s6-rc/services"
* The above directory contains symlinks to
${S6RC_SERVICE_REPO}/{dbus-session-bus,dbus-session-bus-log}
* S6RC_COMPILED="${XDG_STATE_HOME}/s6-rc/compiled"
* Running:
s6-rc-compile "${S6RC_COMPILED}" "${SCANDIR}"
completes successfully.
* Running
s6-svscan -- "${SCANDIR}"
succeeds, with two s6-supervise processes created.
* HOWEVER, running
s6-rc-init -c "${S6RC_COMPILED}" -l "${XDG_RUNTIME_DIR}/s6-rc"
"${SCANDIR}"
fails, with the error message:
unable to supervise service directories in
/run/user/1000/s6-rc/servicedirs: File exists
i've taken a look at s6rc_livedir_create.c:
https://git.skarnet.org/cgi-bin/cgit.cgi/s6-rc/tree/src/libs6rc/s6rc_livedir_create.c
but nothing is leaping out to me as explaining what's happening.
Thoughts?
Alexis.
[a] The current s6 and s6-rc pages on the wiki have lot of detail,
without any "quickstart" tutorials that might make it easy for
people to get on board. A while ago i did a big restructure of the
s6 article:
https://wiki.gentoo.org/wiki/User:Flexibeast/drafts/S6
which i feel improves the current page:
https://wiki.gentoo.org/wiki/S6
but which has been awaiting review by a more senior wiki editor
than me.
The s6-rc page is similarly detailed and similarly lacking a
"quickstart":
https://wiki.gentoo.org/wiki/S6-rc
[b] Various people are providing s6 service definitions,
e.g. https://codeberg.org/alecStewart1/gentoo-s6-scripts, but i'm
not
currently aware of any providing s6-rc service definitions -
pointers welcome. :-)
