[hobbit] multiple hosts
Alexander Stavitsky
astavitsky at yahoo.com
Thu Jan 12 04:42:38 CET 2006
I do not think I address the original question, but we also run
TruCluster5 and just use CDSL links for hobbitclient tmp and log
directories. No script modifications were necessary.
This is how hobbit client directory looks:
drwxr-xr-x 2 hobbit hobbit 8192 Oct 17 10:01 bin
drwxr-xr-x 2 hobbit hobbit 8192 Oct 17 10:01 etc
drwxr-xr-x 2 hobbit hobbit 8192 Oct 17 10:01 ext
lrwxrwxrwx 1 root hobbit 56 Oct 24 09:02 logs ->
../../../cluster/members/{memb}/local/hobbit/client/logs
-r-xr-xr-x 1 hobbit users 3001 Sep 28 17:21 runclient.sh
lrwxrwxrwx 1 root hobbit 55 Oct 24 09:02 tmp ->
../../../cluster/members/{memb}/local/hobbit/client/tmp
We only monitor cluster members at this point, not the virtual host
(cluster aliases)
I do have one problem with Tru64. The disk utilization is being
sometimes reported on device/domain basis, sometimes on the mount point
basis
HP-UX and Linux always reported as mountpoint. If anyone knows how
address this, I will greatly appreciate it
Thanks,
Alex.
Scheblein, Adam wrote:
>I know for us here (running trucluster 5) we ran into the same problem, here is my modified runclient.sh script (the changes are basically I added the `hostname` part to the lock files:
>
>#!/bin/sh
>#----------------------------------------------------------------------------#
># Hobbit client bootup script. #
># #
># This invokes hobbitlaunch, which in turn runs the Hobbit client and any #
># extensions configured. #
># #
># Copyright (C) 2005 Henrik Storner <henrik at hswn.dk> #
># #
># This program is released under the GNU General Public License (GPL), #
># version 2. See the file "COPYING" for details. #
># #
>#----------------------------------------------------------------------------#
>#
># $Id: runclient.sh,v 1.6 2005/09/28 21:21:17 henrik Exp $
>
># Default settings for this client
>MACHINEDOTS="`uname -n`" # This systems hostname
>BBOSTYPE="`uname -s | tr '[A-Z]' '[a-z]'`" # This systems operating system in lowercase
>BBOSSCRIPT="hobbitclient-$BBOSTYPE.sh"
>
># Commandline mods for the defaults
>while test "$1" != ""
>do
> case "$1" in
> --hostname=*)
> MACHINEDOTS="`echo $1 | sed -e's/--hostname=//'`"
> ;;
> --os=*)
> BBOSTYPE="`echo $1 | sed -e's/--os=//' | tr '[A-Z]' '[a-z]'`"
> ;;
> --help)
> echo "Usage: $0 [--hostname=CLIENTNAME] [--os=rhel3|linux22] start|stop"
> exit 0
> ;;
> start)
> CMD=$1
> ;;
> stop)
> CMD=$1
> ;;
> restart)
> CMD=$1
> ;;
> esac
>
> shift
>done
>
>OLDDIR="`pwd`"
>cd "`dirname $0`"
>HOBBITCLIENTHOME="`pwd`"
>cd "$OLDDIR"
>
>MACHINE="`echo $MACHINEDOTS | sed -e's/\./,/g'`"
>
>export MACHINE MACHINEDOTS BBOSTYPE BBOSSCRIPT HOBBITCLIENTHOME
>
>case "$CMD" in
> "start")
> if test ! -w $HOBBITCLIENTHOME/logs; then
> echo "Cannot write to the $HOBBITCLIENTHOME/logs directory"
> exit 1
> fi
> if test ! -w $HOBBITCLIENTHOME/tmp; then
> echo "Cannot write to the $HOBBITCLIENTHOME/tmp directory"
> exit 1
> fi
>
> if test -f $HOBBITCLIENTHOME/logs/clientlaunch.`hostname`.pid; then
> echo "Hobbit client already running, re-starting it"
> $0 stop
> rm -f $HOBBITCLIENTHOME/logs/clientlaunch.`hostname`.pid
> fi
>
> $HOBBITCLIENTHOME/bin/hobbitlaunch --config=$HOBBITCLIENTHOME/etc/clientlaunch.cfg --log=$HOBBITCLIENTHOME/logs/clientlaunch.log --pidfile=$HOBBITCLIENTHOME/logs/clientlaunch.`hostname`.pid
> if test $? -eq 0; then
> echo "Hobbit client for $BBOSTYPE started on $MACHINEDOTS"
> else
> echo "Hobbit client startup failed"
> fi
> ;;
>
> "stop")
> if test -f $HOBBITCLIENTHOME/logs/clientlaunch.`hostname`.pid; then
> kill `cat $HOBBITCLIENTHOME/logs/clientlaunch.$MACHINEDOTS.pid`
> echo "Hobbit client stopped"
> else
> echo "Hobbit client not running"
> fi
> ;;
>
> "restart")
> if test -f $HOBBITCLIENTHOME/logs/clientlaunch.`hostname`.pid; then
> $0 stop
> else
> echo "Hobbit client not running, continuing to start it"
> fi
>
> $0 start
> ;;
>esac
>
>exit 0
>
>
>-----Original Message-----
>From: David Gore [mailto:David.Gore at mci.com]
>Sent: Wednesday, January 11, 2006 9:52 AM
>To: hobbit at hswn.dk
>Subject: Re: [hobbit] multiple hosts
>
>Rolf,
>
>I asked a similar question many months ago for our Digital UNIX (4.x)
>boxes running in multiple clusters. I did not get any answer, so I had
>to create a hack that does run multiple clients on each host. One
>client is for the physical host and does, cpu, disk, etc, and one client
>for the logical/virtual host that does the tasks specific to the
>logical/virtual host. The runclient.sh script runs every ten minutes
>via crontab, to make sure both clients are running and starts either
>client if they are not. I also have custom versions of some of the
>default Hobbit client scripts to support multiple clients on a single
>host. So in short as far as I know, you are going to have to
>hack/script your own solution. I don't mind sending you what my hobbit
>scripts have turned into, but it may not be what you are looking for.
>
>David Gore
>
>*e-mail via SUSE Linux 9.3 and other open source tools.
>
>
>
>Rolf Schrittenlocher wrote:
>
>
>>Hi,
>>
>>as there was no answer to my first mail, I try again with other words:
>>
>>Our machines may have one or more aliases (virtual hosts) which all
>>have DNS-entries. Normally we refer to the machines not using the
>>hostname but by the alias, each of them combined to a bundle of
>>functions and tasks. So a machine "frodo.xxx.de" might host
>>"webserver.xxx.de", "dnsserver.xxx.de" and "tolkserver.xxx.de". These
>>aliases and of course the tasks related to them are transferred to
>>another machine in case of hardware failure, maintenance, etc.
>>In bb-hosts we have an entry for each machine (to get data from this
>>machine in case there is no alias set on it) and of course for all
>>relevant aliases. What we need now is that the general client data
>>(cpu, disk, ssh, ...) for each machine appears both with the hostname
>>and all aliases set on it.
>>I added a script to runclient.sh which creates
>>~/client/etc/clientlaunch.cfg dynamically according to the aliases set
>>on the machine before starting the client. This assures that the
>>correct data is polled on the client. I may modify $MACHINE or Í may
>>use the CLIENT:hostname tag in bb-hosts to make the client send
>>messages with a different name. But that would require several
>>instances of the client running, somethin I dislike. I hope there is a
>>way to send the client data once and to make the server look at some
>>configuration file to see where he should present these data. Maybe
>>that possibility exists but I haven't found it yet. So I hope that
>>someone could indicate me where to search for the places which I have
>>to "hack" hoping that it is possible to do that with shell or perl as
>>my C-knowledge isn't so good. But even if C is necessary: Any hints
>>are appreciated.
>>
>>Thanks Rolf
>>
>>
>>
>
>
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