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View Code? Open in Web Editor NEWA service manager for s6.
Home Page: https://skarnet.org/software/s6-rc/
License: ISC License
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Timeline for remaining red squares?
As one of those stuck with enterprise Linux, I’ve looked into the s6 constellation of software several times now as a potential drop-in replacement for (the useful parts of) systemd. And I’m really excited about the prospect of the two remaining red squares turning green as envisaged in: https://skarnet.com/projects/service-manager.html.
I was wondering if you could give us an update on the rough timeline for this last piece of the puzzle.
Update: in the meantime, this recent piece will be helpful to others in the same shoes https://skarnet.org/software/s6/unit-conversion.html.
Some specific service handling questions
I have a couple of questions regarding services that I couldn't figure out.
-
Is there a way to make s6-rc to have a specific time between restarting services? I'm using an embedded processor and right now if a service fails it tries to restart immediately. I would like to set a delay appropriate to the service before it retries again. This way if lots of services fail at once for some reason, they don't hammer the system. For example, right now I have a internet connection monitoring daemon, if it fails, I'm ok to wait 5s between retries.
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Is there a way to differentiate between an error that is unrecoverable and something that is not? For example as the example above, I have an internet connection daemon which might fail because a config file does not exist. I'd prefer to have it only restart if the error code is below or above a certain number .... e.g. if errorcode is < 100 then keep supervising and restart, if it's above 100 then don't supervise.
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Is there some kind of failure count mechanism? There are some services I would like to retry 10 times then give up on. Once the service is running, I would like to supervise. So this is a kind of semi-supervision state.
I'm sure there are some clever ways to address my issues above, any ideas on how I could handle these cases?
How to suspend?
s6-linux-init-hpr has options to shutdown, halt and reboot... where's suspend ?
Yes, I am using s6 + s6-rc + s6-linux-init on my main machine. :P
P.S. What distro do you personally use? I'm curious. Mine's Artix.
s6-echo? s6-hostname?
Inside examples/source/00/up, I see -
if { s6-echo "init-stage2 starting." }
s6-hostname foo.example.com
Hmm.. s6-echo and s6-hostname are no longer included in s6...
This intrigued me. Why did these programs exist in the first place?
I mean, what is wrong with the usual echo that you needed to write
a new s6-echo for yourself?
Vim or Emacs? Or something else? 😀
s6-rc Oneshot Fails with Timeout
I'm trying to add a oneshot service as a dependency to an existing s6-rc longrun service. The oneshot script takes up to a few minutes to run to prepare some data, but I get a failure due to a timeout about halfway through and the longrun service never starts. My understanding from the documentation was the oneshot should never timeout unless an explicit timeout-up file was given. I had tried adding a 10-minute timeout-up file, but I still get a timeout in less than a minute.
What would be causing this timeout? Is there a time limit to oneshot tasks?
s6-rc-compile does not creating "compiled" file
Hi,
I'm trying to create working s6-based system with s6-rc. My problem is that s6-rc-compile does not create compiled file required by s6-rc-init in destdir even from sources from examples directory:
localhost examples # ls source/
00 fdholder-log init-diskconfig mount-proc ok-wan syslogd-srv
devd fifodir-cleanup init-eth3 mount-rwfs qmail taiclockd-4
devd-log hostapd init-lan mount-swap qmail-log taiclockd-4-log
dns-cache hostapd-log init-sysctl mount-sync qmtpd-4 udhcpc-eth3
dns-cache-log httpd-4 init-urandom mount-sys qmtpd-4-log udhcpc-eth3-log
dns-server-tcp-4 httpd-4-log init-wlan0 ntpclient smtpd-4 udhcpd-wlan0
dns-server-tcp-4-log identd-4 klogd-log ntpclient-log smtpd-4-log udhcpd-wlan0-log
dns-server-udp identd-4-log klogd-srv ok-all sshd-4 wan
dns-server-udp-log init-coldplug mount-cgroups ok-lan sshd-4-log
fdholder init-devtmpfs mount-disks ok-local syslogd-log
localhost examples # s6-rc-compile -v 3 built source/
s6-rc-compile: info: parsing source//ok-lan
s6-rc-compile: info: ok-lan has type bundle
s6-rc-compile: info: parsing source//init-sysctl
s6-rc-compile: info: init-sysctl has type oneshot
s6-rc-compile: info: parsing source//ok-local
s6-rc-compile: info: ok-local has type bundle
s6-rc-compile: info: parsing source//dns-cache-log
s6-rc-compile: info: dns-cache-log has type longrun
s6-rc-compile: info: dns-cache-log is a consumer for dns-cache
s6-rc-compile: info: parsing source//mount-cgroups
s6-rc-compile: info: mount-cgroups has type oneshot
s6-rc-compile: info: parsing source//ok-wan
s6-rc-compile: info: ok-wan has type bundle
s6-rc-compile: info: parsing source//mount-sync
s6-rc-compile: info: mount-sync has type oneshot
s6-rc-compile: info: parsing source//qmail
s6-rc-compile: info: qmail has type longrun
s6-rc-compile: info: qmail is a producer for qmail-log
s6-rc-compile: info: parsing source//ntpclient
s6-rc-compile: info: ntpclient has type longrun
s6-rc-compile: info: ntpclient is a producer for ntpclient-log
s6-rc-compile: info: parsing source//mount-swap
s6-rc-compile: info: mount-swap has type oneshot
s6-rc-compile: info: parsing source//httpd-4
s6-rc-compile: info: httpd-4 has type longrun
s6-rc-compile: info: httpd-4 is a producer for httpd-4-log
s6-rc-compile: info: parsing source//identd-4
s6-rc-compile: info: identd-4 has type longrun
s6-rc-compile: info: identd-4 is a producer for identd-4-log
s6-rc-compile: info: parsing source//sshd-4
s6-rc-compile: info: sshd-4 has type longrun
s6-rc-compile: info: sshd-4 is a producer for sshd-4-log
s6-rc-compile: info: parsing source//mount-rwfs
s6-rc-compile: info: mount-rwfs has type oneshot
s6-rc-compile: info: parsing source//mount-sys
s6-rc-compile: info: mount-sys has type oneshot
s6-rc-compile: info: parsing source//dns-server-udp-log
s6-rc-compile: info: dns-server-udp-log has type longrun
s6-rc-compile: info: dns-server-udp-log is a consumer for dns-server-udp
s6-rc-compile: info: parsing source//ntpclient-log
s6-rc-compile: info: ntpclient-log has type longrun
s6-rc-compile: info: ntpclient-log is a consumer for ntpclient
s6-rc-compile: info: parsing source//devd
s6-rc-compile: info: devd has type longrun
s6-rc-compile: info: devd is a producer for devd-log
s6-rc-compile: info: parsing source//qmtpd-4
s6-rc-compile: info: qmtpd-4 has type longrun
s6-rc-compile: info: qmtpd-4 is a producer for qmtpd-4-log
s6-rc-compile: info: parsing source//klogd-log
s6-rc-compile: info: klogd-log has type longrun
s6-rc-compile: info: klogd-log is a consumer for klogd-srv
s6-rc-compile: info: parsing source//smtpd-4-log
s6-rc-compile: info: smtpd-4-log has type longrun
s6-rc-compile: info: smtpd-4-log is a consumer for smtpd-4
s6-rc-compile: info: parsing source//wan
s6-rc-compile: info: wan has type bundle
s6-rc-compile: info: parsing source//mount-disks
s6-rc-compile: info: mount-disks has type bundle
s6-rc-compile: info: parsing source//ok-all
s6-rc-compile: info: ok-all has type bundle
s6-rc-compile: info: parsing source//devd-log
s6-rc-compile: info: devd-log has type longrun
s6-rc-compile: info: devd-log is a consumer for devd
s6-rc-compile: info: parsing source//init-urandom
s6-rc-compile: info: init-urandom has type oneshot
s6-rc-compile: info: parsing source//taiclockd-4
s6-rc-compile: info: taiclockd-4 has type longrun
s6-rc-compile: info: taiclockd-4 is a producer for taiclockd-4-log
s6-rc-compile: info: parsing source//klogd-srv
s6-rc-compile: info: klogd-srv has type longrun
s6-rc-compile: info: klogd-srv is a producer for klogd-log
s6-rc-compile: info: parsing source//fifodir-cleanup
s6-rc-compile: info: fifodir-cleanup has type longrun
s6-rc-compile: info: parsing source//udhcpc-eth3-log
s6-rc-compile: info: udhcpc-eth3-log has type longrun
s6-rc-compile: info: udhcpc-eth3-log is a consumer for udhcpc-eth3
s6-rc-compile: info: parsing source//qmtpd-4-log
s6-rc-compile: info: qmtpd-4-log has type longrun
s6-rc-compile: info: qmtpd-4-log is a consumer for qmtpd-4
s6-rc-compile: info: parsing source//init-coldplug
s6-rc-compile: info: init-coldplug has type oneshot
s6-rc-compile: info: parsing source//sshd-4-log
s6-rc-compile: info: sshd-4-log has type longrun
s6-rc-compile: info: sshd-4-log is a consumer for sshd-4
s6-rc-compile: info: parsing source//init-eth3
s6-rc-compile: info: init-eth3 has type oneshot
s6-rc-compile: info: parsing source//fdholder-log
s6-rc-compile: info: fdholder-log has type longrun
s6-rc-compile: info: fdholder-log is a consumer for fdholder
s6-rc-compile: info: parsing source//taiclockd-4-log
s6-rc-compile: info: taiclockd-4-log has type longrun
s6-rc-compile: info: taiclockd-4-log is a consumer for taiclockd-4
s6-rc-compile: info: parsing source//dns-server-tcp-4-log
s6-rc-compile: info: dns-server-tcp-4-log has type longrun
s6-rc-compile: info: dns-server-tcp-4-log is a consumer for dns-server-tcp-4
s6-rc-compile: info: parsing source//dns-server-udp
s6-rc-compile: info: dns-server-udp has type longrun
s6-rc-compile: info: dns-server-udp is a producer for dns-server-udp-log
s6-rc-compile: info: parsing source//httpd-4-log
s6-rc-compile: info: httpd-4-log has type longrun
s6-rc-compile: info: httpd-4-log is a consumer for httpd-4
s6-rc-compile: info: parsing source//identd-4-log
s6-rc-compile: info: identd-4-log has type longrun
s6-rc-compile: info: identd-4-log is a consumer for identd-4
s6-rc-compile: info: parsing source//mount-proc
s6-rc-compile: info: mount-proc has type oneshot
s6-rc-compile: info: parsing source//hostapd-log
s6-rc-compile: info: hostapd-log has type longrun
s6-rc-compile: info: hostapd-log is a consumer for hostapd
s6-rc-compile: info: parsing source//00
s6-rc-compile: info: 00 has type oneshot
s6-rc-compile: info: parsing source//udhcpd-wlan0-log
s6-rc-compile: info: udhcpd-wlan0-log has type longrun
s6-rc-compile: info: udhcpd-wlan0-log is a consumer for udhcpd-wlan0
s6-rc-compile: info: parsing source//udhcpc-eth3
s6-rc-compile: info: udhcpc-eth3 has type longrun
s6-rc-compile: info: udhcpc-eth3 is a producer for udhcpc-eth3-log
s6-rc-compile: info: parsing source//qmail-log
s6-rc-compile: info: qmail-log has type longrun
s6-rc-compile: info: qmail-log is a consumer for qmail
s6-rc-compile: info: parsing source//hostapd
s6-rc-compile: info: hostapd has type longrun
s6-rc-compile: info: hostapd is a producer for hostapd-log
s6-rc-compile: info: parsing source//init-diskconfig
s6-rc-compile: info: init-diskconfig has type oneshot
s6-rc-compile: info: parsing source//dns-cache
s6-rc-compile: info: dns-cache has type longrun
s6-rc-compile: info: dns-cache is a producer for dns-cache-log
s6-rc-compile: info: parsing source//init-lan
s6-rc-compile: info: init-lan has type oneshot
s6-rc-compile: info: parsing source//fdholder
s6-rc-compile: info: fdholder has type longrun
s6-rc-compile: info: fdholder is a producer for fdholder-log
s6-rc-compile: info: parsing source//init-devtmpfs
s6-rc-compile: info: init-devtmpfs has type oneshot
s6-rc-compile: info: parsing source//udhcpd-wlan0
s6-rc-compile: info: udhcpd-wlan0 has type longrun
s6-rc-compile: info: udhcpd-wlan0 is a producer for udhcpd-wlan0-log
s6-rc-compile: info: parsing source//init-wlan0
s6-rc-compile: info: init-wlan0 has type oneshot
s6-rc-compile: info: parsing source//syslogd-log
s6-rc-compile: info: syslogd-log has type longrun
s6-rc-compile: info: syslogd-log is a consumer for syslogd-srv
s6-rc-compile: info: parsing source//smtpd-4
s6-rc-compile: info: smtpd-4 has type longrun
s6-rc-compile: info: smtpd-4 is a producer for smtpd-4-log
s6-rc-compile: info: parsing source//dns-server-tcp-4
s6-rc-compile: info: dns-server-tcp-4 has type longrun
s6-rc-compile: info: dns-server-tcp-4 is a producer for dns-server-tcp-4-log
s6-rc-compile: info: parsing source//syslogd-srv
s6-rc-compile: info: syslogd-srv has type longrun
s6-rc-compile: info: syslogd-srv is a producer for syslogd-log
s6-rc-compile: info: making bundles for pipelines
s6-rc-compile: info: creating bundle for pipeline syslogd
s6-rc-compile: info: creating bundle for pipeline dns-server-tcp-4-pipeline
s6-rc-compile: info: creating bundle for pipeline smtpd-4-pipeline
s6-rc-compile: info: creating bundle for pipeline udhcpd-wlan0-pipeline
s6-rc-compile: info: creating bundle for pipeline fdholder-pipeline
s6-rc-compile: info: creating bundle for pipeline dns-cache-pipeline
s6-rc-compile: info: creating bundle for pipeline hostapd-pipeline
s6-rc-compile: info: creating bundle for pipeline udhcpc-eth3-pipeline
s6-rc-compile: info: creating bundle for pipeline dns-server-udp-pipeline
s6-rc-compile: info: creating bundle for pipeline klogd
s6-rc-compile: info: creating bundle for pipeline taiclockd-4-pipeline
s6-rc-compile: info: creating bundle for pipeline qmtpd-4-pipeline
s6-rc-compile: info: creating bundle for pipeline devd-pipeline
s6-rc-compile: info: creating bundle for pipeline sshd-4-pipeline
s6-rc-compile: info: creating bundle for pipeline identd-4-pipeline
s6-rc-compile: info: creating bundle for pipeline httpd-4-pipeline
s6-rc-compile: info: creating bundle for pipeline ntpclient-pipeline
s6-rc-compile: info: creating bundle for pipeline qmail-pipeline
s6-rc-compile: info: resolving bundle names
s6-rc-compile: info: converting bundle array
s6-rc-compile: info: resolving service names
s6-rc-compile: info: converting service dependency array
s6-rc-compile: info: checking database correctness
s6-rc-compile: info: writing compiled information to built
s6-rc-compile: info: writing built/n
s6-rc-compile: info: writing built/resolve.cdb
s6-rc-compile: info: writing built/db
s6-rc-compile: info: writing built/servicedirs
localhost examples # ls built/
db lock n resolve.cdb servicedirs
localhost examples #
localhost examples # s6-rc-init /home/ecko/develop/s6-rc/examples/built/
s6-rc-init: fatal: unable to open /etc/s6-rc/compiled: No such file or directory
localhost examples #
There is some system info:
localhost examples # eix s6
<...>
* app-emulation/s6-overlay
Available versions: ~1.18.1.3
Homepage: https://github.com/just-containers/s6-overlay
Description: an s6-based init system for containers
[I] sys-apps/s6
Available versions: 2.1.3.0 (~)2.2.4.3 (~)2.3.0.0 {static static-libs}
Installed versions: 2.3.0.0(19:35:33 31/10/16)(-static -static-libs)
Homepage: http://www.skarnet.org/software/s6/
Description: skarnet.org's small and secure supervision software suite
[I] sys-apps/s6-linux-init
Available versions: (~)0.0.1.4 (~)0.1.0.0 {static}
Installed versions: 0.1.0.0(20:27:42 07/12/16)(-static)
Homepage: http://www.skarnet.org/software/s6-linux-init/
Description: Generates an init binary for s6-based init systems
[I] sys-apps/s6-linux-utils
Available versions: (~)2.0.2.3 (~)2.1.0.0 {static}
Installed versions: 2.1.0.0(20:27:46 07/12/16)(-static)
Homepage: http://www.skarnet.org/software/s6-linux-utils/
Description: Set of tiny linux utilities
[I] sys-apps/s6-portable-utils
Available versions: (~)2.0.5.3 (~)2.0.6.0 {static}
Installed versions: 2.0.6.0(20:35:25 07/12/16)(-static)
Homepage: http://www.skarnet.org/software/s6-portable-utils/
Description: Set of tiny portable unix utilities
[I] sys-apps/s6-rc
Available versions: (~)0.0.2.1 (~)0.0.3.0 {static static-libs}
Installed versions: 0.0.3.0(20:27:52 07/12/16)(-static -static-libs)
Homepage: http://www.skarnet.org/software/s6-rc/
Description: Service manager for the s6 supervision suite
<...>
localhost examples #
Can you help me with this issue? Thank you!
How to make it work with GDM?
How can I make it work with GDM.
I have installed gdm and gdm-s6 and enabled the service via:
s6-rc-bundle-update add default gdm.
After the boot is finished, I get a blank screen.
restart a service using s6-rc
So far I have been using -u/-d change options to bring up or bring down a service. Is there a way to restart the service without have to run two commands?
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