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

[Dean Casey]

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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>
>

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