The other node name of a SUN cluster Post: 302092294

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Top Forums Shell Programming and Scripting The other node name of a SUN cluster Post 302092294 by heartwork on Sunday 8th of October 2006 12:54:47 PM

10-08-2006

Registered User

The other node name in a SUN cluster

Hello,

Under ksh I have to run a script on one of the nodes of a Solaris 8 cluster which at some time must execute a command on the alternate node:
# rsh <name> "command"

I have to implement this script on all the clusters of my company (a lot of...).
Fortunately, the names of the two nodes obey the following rule: a common string excepting the last character which is 1 on one node and 2 for the other.
I don't want to read the names of the machines in /etc/hosts which is really a mess on some clusters... (obsolete names etc.)

I thought to the following solution:

1. Read in a variable the name of the current node (uname ... ?!?)

2. In the script I added a part that get from the current node name the other node name. From some reason... when I run from the ksh the commands one by one it works fine:

Code:

root@carp # X=abc12
root@carp # numofchar=${#X}
root@carp # numofcharminus1=`expr $numofchar "-" 1`
root@carp # Y=`echo "$X" | cut -c1-${numofcharminus1}`
root@carp # Z=`echo "$X" | cut -c${numofchar}`
root@carp # T=`expr 3 "-" $Z`
root@carp # echo $Y$T
abc11

but when I insert them in the script I got error messages like:

Y=`echo "$X" | cut -c1-${numofcharminus1}`
cut - invalid range

T=`expr 3 "-" $Z`
invalid expression

I don't use scripting too often but I can't see what's wrong in my solution... a CR rule/type conversion... I am too tired and I must finish it until tommorow so please can someone help me! Maybe someone forsee another solution?

Regards

Last edited by heartwork; 10-08-2006 at 04:18 PM..

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LEARN ABOUT CENTOS

crm_node

PACEMAKER(8)						  System Administration Utilities					      PACEMAKER(8)

NAME

       Pacemaker - Part of the Pacemaker cluster resource manager

SYNOPSIS

       crm_node command [options]

DESCRIPTION

       crm_node - Tool for displaying low-level node information

OPTIONS

       -?, --help
	      This text

       -$, --version
	      Version information

       -V, --verbose
	      Increase debug output

       -Q, --quiet
	      Essential output only

   Stack:
       -A, --openais
	      Only try connecting to an OpenAIS-based cluster

       -H, --heartbeat
	      Only try connecting to a Heartbeat-based cluster

   Commands:
       -n, --name
	      Display the name used by the cluster for this node

       -N, --name-for-id=value
	      Display the name used by the cluster for the node with the specified id

       -e, --epoch
	      Display the epoch during which this node joined the cluster

       -q, --quorum
	      Display a 1 if our partition has quorum, 0 if not

       -l, --list
	      Display all known members (past and present) of this cluster (Not available for heartbeat clusters)

       -p, --partition
	      Display the members of this partition

       -i, --cluster-id
	      Display this node's cluster id

       -R, --remove=value
	      (Advanced) Remove the (stopped) node with the specified name from Pacemaker's configuration and caches

       In the case of Heartbeat, CMAN and Corosync 2.0, requires that the node has already been removed from the underlying cluster

   Additional Options:
       -f, --force

AUTHOR

       Written by Andrew Beekhof

REPORTING BUGS

       Report bugs to pacemaker@oss.clusterlabs.org

Pacemaker 1.1.10-29.el7 					     June 2014							      PACEMAKER(8)