[hobbit] I'm getting the error "could not lock RRD"

Mon Jun 25 18:59:25 CEST 2007

Hobbit definitely wasn't being ran as root and the rrd directories
were created either by hobbit or by the install script. The version
I'm running at the moment is on a test system, when I roll it out to
the new live box I'll see if it happens again.

Robin

On 6/25/07, Galen Johnson <Galen.Johnson at sas.com> wrote:
> I thought the hobbit startup script already checked for being run as root (I know if I try to run as root it tells me to run it as the hobbit user)...unless it was configured to do so at compile time.  NFS generally can't handle being updated as root unless you explicitly configure the server to allow it in the mount config (this varies from system to system so check out the manpage).  This would explain the behavior you're seeing when running hobbiut as root.
>
> =G=
>
> -----Original Message-----
> From: Dean Casey [mailto:dcasey at pathfire.com]
> Sent: Monday, June 25, 2007 10:44 AM
> To: hobbit at hswn.dk
> Subject: RE: [hobbit] I'm getting the error "could not lock RRD"
>
> Seymour makes a good point. I also get similar errors when running Hobbit as root... doing that often changes file permissions and "breaks"
> Hobbit afterward.
>
> The solution was to set up a very simple startup file that looks something like this (on RedHat, other Linuxes will vary but should be pretty close), based on the old BB startup script:
>
> ###
> ###
> #!/bin/bash
> #
> # hobbit-server   This shell script takes care of starting and stopping
> #                 hobbit monitoring server.
> #
> # chkconfig: - 99 45
> # description: Hobbit monitoring server is\ # used to monitor Pathfire's systems.
> # probe: true
>
> # Source function library.
> . /etc/rc.d/init.d/functions
>
> # Source networking configuration.
> . /etc/sysconfig/network
>
> # Check that networking is up.
> [ "${NETWORKING}" = "no" ] && exit 0
>
>
> PATH=$PATH:/bin:/usr/bin                # FOR su
> BBHOME=/home/hobbit
> BBUSER=hobbit
>
> case "$1" in
> start)
>         su - $BBUSER -c "cd $BBHOME;./server/hobbit.sh start"
>         ;;
> restart)
>         su - $BBUSER -c "cd $BBHOME;./server/hobbit.sh restart"
>         ;;
> stop)
>         su - $BBUSER -c "cd $BBHOME;./server/hobbit.sh stop"
>         ;;
> status)
>         su - $BBUSER -c "cd $BBHOME;./server/hobbit.sh status"
>         ;;
> *)
>         echo "Usage: $0 {start|stop|restart|status}"
>         exit 1
>         ;;
> esac
>
> exit 0
> ###
> ###
>
> I then set permissions on the startup file so:
> -rwxr-xr-x   1 root root   954 Jun 19 11:49 hobbit-server
>
> I then ran:
> "chkconfig --345 hobbit-server on"
>
>
> Now, on RedHat, I can run hobbit server without worrying about "su - hobbit" first, using commands:
> "service hobbit-server (start|stop|restart|status)"
>
>
> You can do something similar for the hobbit client on RedHat or other Linux variants. Solaris would use a truncated version of this startup script.
>
> Dean Casey
>
>
> -----Original Message-----
> From: Brown, Seymour [mailto:Seymour.Brown at WJMC.ORG]
> Sent: Monday, June 25, 2007 10:19 AM
> To: hobbit at hswn.dk
> Subject: RE: [hobbit] I'm getting the error "could not lock RRD"
>
> Indeed, we get this when something in our MRTG process gets an error, and the rrd data files then become owned by root instead of hobbit. We also get it if we start hobbit as root instead of hobbit. I think the lock is a red herring - it simply could not open the file.
>
> My fix has been to do cd /var/lib/hobbit/rrd (or wherever you keep your rrd data) and then chown hobbit * -R
>
> As far as the MRTG causing it, the MRTG logs generally point the way.
>
> The key seems to be to configure and operate hobbit as the hobbit user.
>
> =Seymour=
>
> Seymour J. Brown
> Network Analyst
> CCNA, CFS, CWNA, Network+
> West Jefferson Medical Center
> 1101 Medical Center Blvd.
> Marrero, LA 70072
> 504-349-2396
>
>
> -----Original Message-----
> From: Dean Casey [mailto:dcasey at pathfire.com]
> Sent: Saturday, June 23, 2007 12:08 AM
> To: hobbit at hswn.dk
> Subject: RE: [hobbit] I'm getting the error "could not lock RRD"
>
> I've seen this rrd error in the past when rrd libraries, binaries, or data files had incorrect permissions or were missing (unavailable).
>
> Dean Casey
>
>
>
> -----Original Message-----
> From: Robin Wood [mailto:dninja at gmail.com]
> Sent: Friday, June 22, 2007 4:59 PM
> To: hobbit at hswn.dk
> Subject: Re: [hobbit] I'm getting the error "could not lock RRD"
>
> Hi
> The directory is a nfs share. I'll try moving the data directory to a local disk and see if that fixes it.
>
> Robin
>
> On 6/22/07, Henrik Stoerner <henrik at hswn.dk> wrote:
> > On Fri, Jun 22, 2007 at 07:27:27PM +0100, Robin Wood wrote:
> > > 2007-06-22 19:24:55 RRD error updating
> > > /var/sites/hobbit/non-secure//data/rrd/xxx/procs.rrd from
> 192.168.0.2:
> > > could not lock RRD
> >
> > It's an error from the rrdtool library. I honestly have no idea what
> > could be causing this.
> >
> > Is the /var/sites/hobbit/non-secure//data/rrd an NFS filesystem?
> > Perhaps there's some issue with locking on networked filsystems.
> >
> >
> > Regards,
> > Henrik
> >
> >
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