Trouble starting services on boot with s6-rc

[dark.pen9108@fastmail.com]

[-- Attachment #1: Type: text/plain, Size: 4671 bytes --]

Hi,

Hoping this is the right place to ask for some help as I am very new to s6 and not well versed on any init system.  

I’m attempting to use what I understand to be the “new” s6-rc way to start some processes in a docker container. 

Just for testing out what I want to do, I have a oneshot who’s job is just to sleep, and a longrun that depends on the oneshot. 

I have created the following files 

[Aug 19 18:42:24 root@s6 ~]# ll /etc/s6-overlay/s6-rc.d/longrun_test/
total 12
-rw-rw-r-- 1 root root 13 Aug 17 23:19 dependencies
-rw-rw-r-- 1 root root 53 Aug 19 18:29 run
-rw-rw-r-- 1 root root  8 Aug 17 23:19 type
[Aug 19 18:42:24 root@s6 ~]# cat /etc/s6-overlay/s6-rc.d/longrun_test/type
longrun
[Aug 19 18:42:24 root@s6 ~]# cat /etc/s6-overlay/s6-rc.d/longrun_test/run
#!/command/execlineb -P
/usr/local/bin/longrun_start
[Aug 19 18:42:24 root@s6 ~]# cat /etc/s6-overlay/s6-rc.d/longrun_test/dependencies
sleeponstart
[Aug 19 18:42:24 root@s6 ~]# ll /etc/s6-overlay/s6-rc.d/sleeponstart/
total 8
-rw-rw-r-- 1 root root  8 Aug 15 21:53 type
-rw-rw-r-- 1 root root 52 Aug 16 20:25 up
[Aug 19 18:42:24 root@s6 ~]# cat /etc/s6-overlay/s6-rc.d/sleeponstart/type
oneshot
[Aug 19 18:42:24 root@s6 ~]# cat /etc/s6-overlay/s6-rc.d/sleeponstart/up
#!/command/execlineb -P
/usr/local/bin/sleeponstart

I can see that my services are registered with s6-rc 

[Aug 19 18:43:04 root@s6 ~]# s6-rc-db list all | grep -e longrun_test -e sleeponstart
sleeponstart
longrun_test

The test services are very simple scripts just to prove they ran
[Aug 19 18:44:23 root@s6 ~]# cat /usr/local/bin/sleeponstart
#!/bin/bash
sleep_time=30
sleep ${sleep_time}
echo "I slept for ${sleep_time}." > /tmp/i_slept
[Aug 19 18:44:23 root@s6 ~]# cat /usr/local/bin/longrun_start
#!/bin/bash
echo "I started the longrun" > /tmp/longrun_started

But when I look in tmp I never see the files created.

[Aug 19 18:44:23 root@s6 ~]# ll /tmp/
total 652
-rw------- 1 root root   5516 Mar  7 20:55 s6-overlay-noarch.tar.xz
-rw------- 1 root root 656864 Mar  7 20:55 s6-overlay-x86_64.tar.xz

If I start the longrun manually it and its dependency do run.  

[Aug 19 18:50:00 root@s6 ~]# s6-rc -a change longrun_test
[Aug 19 18:52:08 root@s6 ~]# ll /tmp/
total 660
-rw-r--r-- 1 root root     16 Aug 19 18:50 i_slept
-rw-r--r-- 1 root root     22 Aug 19 18:52 longrun_started
-rw------- 1 root root   5516 Mar  7 20:55 s6-overlay-noarch.tar.xz
-rw------- 1 root root 656864 Mar  7 20:55 s6-overlay-x86_64.tar.xz

So I would normally just think I am missing something to make them start on boot BUT, soon after boot I do see my oneshot running. 
[Aug 19 18:53:54 root@s6 /]# ps aux
USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root           1  0.5  0.0    200    64 ?        Ss   18:53   0:00 /package/admin/s6/command/s6-svscan -d4 -- /run/service
root          14  0.0  0.0   4152  3104 pts/0    Ss+  18:53   0:00 /bin/sh -e /run/s6/basedir/scripts/rc.init top
root          15  0.0  0.0    204    64 ?        S    18:53   0:00 s6-supervise s6-linux-init-shutdownd
root          16  0.0  0.0    196     4 ?        Ss   18:53   0:00 /package/admin/s6-linux-init/command/s6-linux-init-shutdownd -c /run/s6/basedir -g 3000 -C -B
root          23  0.0  0.0    204    68 ?        S    18:53   0:00 s6-supervise s6rc-oneshot-runner
root          24  0.0  0.0    204    64 ?        S    18:53   0:00 s6-supervise longrun_test
root          25  0.0  0.0    204    60 ?        S    18:53   0:00 s6-supervise s6rc-fdholder
root          28  0.0  0.0    208    64 pts/0    S+   18:53   0:00 s6-rc -v2 -u -t 5000 -- change top
root          32  0.0  0.0    180     4 ?        Ss   18:53   0:00 /package/admin/s6/command/s6-ipcserverd -1 -- /package/admin/s6/command/s6-ipcserver-access -v0 -E -l0 -i data/rules
root          34  0.0  0.0    192    52 pts/0    S+   18:53   0:00 /package/admin/s6-2.11.1.0/command/s6-sudoc -e -t 30000 -T 4999 -- up 3
root          36  0.0  0.0    200    60 ?        S    18:53   0:00 /package/admin/s6/command/s6-sudod -t 30000 -- /package/admin/s6-rc/command/s6-rc-oneshot-run -l ../.. --
root          38  0.0  0.0   4152  3080 ?        S    18:53   0:00 /bin/bash /usr/local/bin/sleeponstart <--------------
root          40  0.0  0.0   2616   940 ?        S    18:53   0:00 sleep 30 <-----------------
root          53  1.0  0.0   4812  3836 pts/1    Ss   18:53   0:00 /bin/bash
root          74  0.0  0.0   7396  3268 pts/1    R+   18:53   0:00 ps aux

Sorry if this was much more info than was relevant. Any help would be great. Thanx so much! 

-Benjamin