crashes when trying to run as user nobody about diamond

[kormoc]

What distro is this and did you build a package?

[Dieterbe]

CentOS release 6.2 (Final), built using make buildrpm using the latest git

[kormoc]

I think 63d28b3 might do the trick, or at least help us track it down

[Dieterbe]

$ grep "Failed to write pid." /usr/bin/diamond < -- check to be sure the new package is installed
            print >> sys.stderr, "Failed to write pid." % (e)
$ sudo rm /var/log/diamond/*.log*
$ sudo /etc/init.d/diamond start
Starting diamond: Error occurs when initialize logging: [Errno 13] Permission denied: '/var/log/diamond/diamond.log'
                                                           [  OK  ]
$ pgrep -fl diamond <-- process running? no
$ sudo su -
# touch /var/log/diamond/diamond.log && chown nobody:nobody /var/log/diamond/diamond.log && ls -alh /var/log/diamond/diamond.log
-rw-r--r-- 1 nobody nobody 0 Jul 19 06:29 /var/log/diamond/diamond.log

# /etc/init.d/diamond start
Starting diamond:                                          [  OK  ]
# pgrep -fl diamond <-- still not running
# cd /var/log/diamond/
# ls -alh
total 12K
drwxr-xr-x   2 root   root   4.0K Jul 19 06:29 .
drwxr-xr-x. 12 root   root   4.0K Jul 15 03:26 ..
-rw-r--r--   1 nobody nobody  140 Jul 19 06:29 diamond.log
-rw-r--r--   1 root   root      0 Jul 16 18:30 .keep
# cat diamond.log 
[2012-07-19 06:29:47,920] [MainThread] Changed UID: 99 (nobody) GID: 99 (nobody).
[2012-07-19 06:29:47,920] [MainThread] Detaching Process.

[Dieterbe]

running in foreground works. the process runs as nobody:nobody and submits its stats.
in background. note that your "Failed to write pid" check won't work as you're attempting to write to stderr after closing it. so change it to log.error() or something. also you forgot a %s, now your code yields a not all arguments converted during string formatting

btw in /var/log/messages i'm getting these:

Jul 19 06:51:42 nyvimeodfs1 python: abrt: detected unhandled Python exception in /usr/bin/diamond
Jul 19 06:51:42 nyvimeodfs1 abrtd: New client connected
Jul 19 06:51:42 nyvimeodfs1 abrt-server[29092]: Saved Python crash dump of pid 29090 to /var/spool/abrt/pyhook-2012-07-19-06:51:42-29090
Jul 19 06:51:42 nyvimeodfs1 abrtd: Directory 'pyhook-2012-07-19-06:51:42-29090' creation detected
Jul 19 06:51:42 nyvimeodfs1 abrt-server[29092]: statvfs('(null)'): Bad address
Jul 19 06:51:42 nyvimeodfs1 abrtd: Package 'diamond' isn't signed with proper key
Jul 19 06:51:42 nyvimeodfs1 abrtd: Corrupted or bad dump /var/spool/abrt/pyhook-2012-07-19-06:51:42-29090 (res:2), deleting

unfortunately there's nothing in /var/spool/abrt/
Anyway, after fixing the pidfile stderr stuff got:
Failed to write pid: [Errno 13] Permission denied: '/var/run/diamond.pid'
maybe you should first create it as the user invoked as (root), before dropping privileges. not sure...

[Dieterbe]

deployed a new rpm built from your personal fork, seems to work fine!

[kormoc]

Awesome!