e372f97beb
This changes the default s6 service directory to /var/svc.d, also it changes the code to work with the individual services instead of forcing a rescan when a service is started or stopped.
1.9 KiB
Using S6 with OpenRC
Beginning with OpenRC-0.16, we support using the s6 supervision suite from Skarmet Software in place of start-stop-daemon for monitoring daemons [1].
Setup
Documenting s6 in detail is beyond the scope of this guide. It will document how to set up OpenRC services to communicate with s6.
Use Default start, stop and status functions
If you write your own start, stop and status functions in your service script, none of this will work. You must allow OpenRC to use the default functions.
Dependencies
All OpenRC service scripts that want their daemons monitored by s6 should have the following line added to their dependencies to make sure the s6 scan directory is being monitored.
need s6-svscan
Variable Settings
The most important setting is the supervisor variable. At the top of your service script, you should set this variable as follows:
supervisor=s6
Several other variables affect s6 services. They are documented on the openrc-run man page, but I will list them here for convenience:
s6_service_path - the path to the s6 service directory s6_svwait_options_start - the options to pass to s6-svwait when starting s6_svwait_options_stop - the options to pass to s6-svwait when stopping.
The s6_service_path variable defaults to /var/svc.d/${RC_SVCNAME} if it is not set in the service script. For example, if you want a service script called /etc/init.d/foobar to use s6 to monitor its daemon, the s6 service should be the directory /var/svc.d/foobar.
See the documentation for s6 for more information about s6 service directories.
The s6_svwait_options_* variables set command line options to pass to s6-svwait when starting or stopping the s6 service. These can be very useful for waiting for s6 services to signal when they are up, timing out when an s6 service doesn't come up, etc.
This is very early support, so feel free to file bugs if you have issues.