| tstone | hi, is there a way to get dbus signals as events in the upstart daemon? | 16:14 |
|---|---|---|
| Keybuk | fairly trivially with some python | 16:15 |
| tstone | this is for a embedded device and i don't have any python on that :-( | 16:16 |
| tstone | i have seen there is s.t. like a upstart-udev-bridge under lucid, would this be a good template to get this | 16:17 |
| Keybuk | C? | 16:17 |
| Keybuk | yeah, exactly | 16:17 |
| tstone | functionality into dbus | 16:17 |
| Keybuk | you connect to the bus, add a match on the signal, and when you get the signal, you make a method call to Upstart to emit the event | 16:17 |
| tstone | so it might also be possible to use the upstart dbus interface to emit a new event? | 16:20 |
| Keybuk | it is | 16:20 |
| Keybuk | com.ubuntu.Upstart0_6.EmitEvent | 16:20 |
| Keybuk | http://upstart.ubuntu.com/wiki/DBusInterface | 16:21 |
| tstone | nice, i think i will use the dbus interface, thanks | 16:28 |
| tstone | i have btw. integrated upstart into ptxdist.org which is a build system for embedded systems. | 16:28 |
| tstone | i am planning to get the patches upstream. | 16:29 |
| Keybuk | cool | 16:46 |
| tstone | good bye | 16:55 |
| Linicks | I would like to start the unicorn web server for my rails environment at stat startup as a specific user. Can you point me in the right direction? | 17:39 |
| Linicks | I have found docs for creating startup commands with exec, but nothing that specifies the user | 17:39 |
| ion | For now, use su. | 17:41 |
| Linicks | ok, will give that a try. thx | 17:41 |
| Linicks | created a configuration file ( http://pastie.org/980315) in /etc/init. But I'm not sure how to test it. I tried -- sudo start priver -- but get --- start: Unknown job: priver | 18:23 |
| Linicks | per the docs here : http://upstart.ubuntu.com/getting-started.html | 18:24 |
| Linicks | I'm sure I'm missing something simple. | 18:24 |
| Linicks | ion: any ideas? | 18:28 |
| ion | 0) Unicorn is a service, not a task. 1) Running su in a pre-start script has no effect on the exec. (Btw, you can use ; instead of && since the script is run with set -e.) 2) The specific problem that caused Upstart not to recognize the job at all is a syntax error (as you’ll find in your syslog), namely that ‘pre-start blah’ is invalid syntax; you’d use ‘pre-start exec blah’ or a pre-start script. | 18:33 |
| ion | exec su -c 'set -e; ...' username, or something like that | 18:34 |
| Linicks | ion: Thanks! I will work on that and see if I get any further :) | 18:36 |
| ion | exec su -c 'set -e; cd PATH; exec unicorn_rails blahblah' username, where the parameters for unicorn_rails make it not daemonize/fork. | 18:38 |
| ion | Also, you probably don’t want it to start on startup, but instead when there’s a writeable filesystem etc. | 18:39 |
| ion | ‘start on filesystem’ may or may not suffice. | 18:39 |
| Linicks | ion: Making some headway! But when I run the job --> start priverpriver I get --> start/running, process 4954, but the process isn't in the process list. I've tested this --> set -e; cd /home/prweb/priver_002/; unicorn_rails -p 59504 directly on the command line and it works. | 19:24 |
| ion | unicorn_rails probably forks then. You’ll need to make it not fork/daemonize. :-) | 19:25 |
| Linicks | I think by design unicorn creates a fork(s). Would it be better to use script instead of exec, if thats the case? | 19:27 |
| ion | That’s not relevant. | 19:28 |
| ion | Judging from http://unicorn.bogomips.org/unicorn_rails_1.html, it shouldn’t daemonize without -D. Dunno why it does, then. | 19:29 |
| Linicks | Ok, so that I understand this a little better, why can't it start as a daemon? | 19:30 |
| ion | What does status priverpriver say? | 19:30 |
| Linicks | status: Unable to connect to system bus: Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory | 19:31 |
| ion | Your dbus service seems to be dead. Try sudo status priverpriver for now. | 19:31 |
| Linicks | sudo status priver --> priver stop/waiting | 19:33 |
| Linicks | Just as an FYI, I'm on a new Ubuntu 10.04 server install with all current updates. | 19:34 |
| ion | If you run unicorn_rails -p 59504 from the command line, does it daemonize or stay in the foreground? | 19:34 |
| Linicks | it stays in the foreground. | 19:37 |
| Linicks | Here is the example output from my test server --> http://pastie.org/980495 | 19:40 |
| ion | Ok, so daemonizing is not the problem. | 19:46 |
| ion | Please share your current job definition. | 19:46 |
| Linicks | Here is my current def --> http://pastie.org/980518 | 19:48 |
| ion | (You may want to change ‘...; unicorn_rails ...’ to ‘...; exec unicorn_rails ...’, but that’s not the problem here, it just doesn’t leave an extra shell process running that way.) | 19:51 |
| ion | script | 19:52 |
| ion | exec >/home/prweb/priver_002/job.log 2>&1 | 19:52 |
| ion | set -x | 19:53 |
| ion | exec su -c 'set -ex; cd /home/prweb/priver_002/; exec unicorn_rails -p 59504 --host 192.168.1.15' prweb | 19:53 |
| ion | end script | 19:53 |
| ion | Try that. Anything interesting in job.log? | 19:53 |
| Linicks | This was in the log -- bash: line 0: exec: unicorn_rails: not found | 19:57 |
| Linicks | It doesn't seem to be getting the users environment ? | 19:57 |
| ion | Ok, try /path/to/unicorn_rails | 19:57 |
| Linicks | I tried it with the full path to unicorn_rails, and I'm getting the same results.. | 20:02 |
| Linicks | Of course everything works correctly when I execute the command directly from the shell. | 20:03 |
| ion | It says “exec: /.../unicorn_rails: not found”? | 20:04 |
| Linicks | Getting this in the log --> /home/prweb/.rvm/rubies/ruby-1.9.1-p378/lib/ruby/site_ruby/1.9.1/rubygems.rb:779:in `report_activate_error': Could not find RubyGem unicorn (>= 0) (Gem::LoadError) | 20:09 |
| ion | Ok, you’ll need to insert a command to load the rvm environment before executing unicorn_rails. | 20:12 |
| ion | exec su -c 'set -e; . /home/prweb/.rvm/scripts/rvm; exec ...' prweb | 20:13 |
| ion | it seems | 20:13 |
| Linicks | Excellent!!! That finally did the trick.. Couldn't have done this without you help. Many, Many Thanks!!! | 20:19 |
| Imperion | um | 22:27 |
| Imperion | I'm trying to boot up Linux on a USB stick with Upstart as the init daemon | 22:28 |
| Imperion | but for some reason, it's not doing any jobs nor listening for ctrl-alt-del (it doesn't trigger a reboot) | 22:28 |
| Imperion | it seems like it dies right after startup | 22:29 |
| Imperion | any ideas? | 22:29 |
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