Shell Programming and Scripting

Hi

I am trying to run a script centrally that will go out and set the network management ip address on all my Sun boxes running Solaris. We have decided that the network management address will be the boxes main IP address but the first octet as a 172 rather than a 10, so for example ifconfig -a will look like this

Code:

[root@a-server # ifconfig -a
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
dmfe0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 10.36.14.45 netmask ffff0000 broadcast 10.32.255.255
        ether 0:3:ba:5:a8:1a

the command to set the management IP address locally on these machines would be

Code:

/usr/sfw/bin/ipmitool -I bmc lan set 1 ipaddr 172.36.14.45

so I have written a little script that and will do a sed replace against the output of ifconfig, switch the 10 for a 172 blah blah and throw the output into the ipmitool command listed above, and when run locally on the target machine it works like a dream ...here it is

Code:

/usr/sfw/bin/ipmitool -I bmc lan set 1 ipaddr `ifconfig -a | grep inet | grep -v 127.0.0.1 | head -1 | sed s/^.*inet\ // | sed s/\ netmask.*$// | sed s/^10/172/`

So as I say, rather than running this on every box locally, ive written another script that goes out to all machines (listed in a file called serverlist) using SSH and sets it remotely, the problem is, when I do this, the embedded ifconfig/sed bit seems to run locally on my central servers IP address and not on the target box, so in other words it sets the remote boxes management IP to my central boxes main IP (with the 10 switched for a 172) ....I just cant seem to get it to properly embed and run the command on the target box

here is my script

Code:

#!/bin/ksh

for hostname in `cat /data/serverlist`
do

       echo $hostname
       ssh $hostname "/usr/sfw/bin/ipmitool -I bmc lan set 1 ipaddr `ifconfig -a | grep inet | grep -v 127.0.0.1 | head -1 | sed s/^.*inet\ // | sed s/\ netmask.*$// | sed s/^10/172/`"

done

When run ...

Code:

[root@central-server] # ./configure.sh
a-server
Setting LAN IP Address to 172.1.0.45  << this should be 172.36.14.45

does anybody know why this is happening....ive tried changing the " for a ' but then it stops working altogether

any help would be greatly appreciated

As a guess-

Code:

ssh $hostname \
"ifconfig -a | grep inet | grep -v 127.0.0.1 | head -1 | sed s/^.*inet\ // | sed s/\ netmask.*$// | sed s/^10/172/ " | read value
ssh $hostname "/usr/sfw/bin/ipmitool -I bmc lan set 1 ipaddr $value"

The script gets initially parsed by the current shell, then run remotely. To get it properly run in the remote boxes, first you need to escape the special characters, say backquotes `, $ signs,....
For instance from your ifconfig output, using nawk, this code might help:

Code:

while read host
do
echo "$host"
ssh "$host" <<EOF
/usr/sfw/bin/ipmitool -I bmc lan set 1 ipaddr \`ifconfig -a | nawk '/ether/{f=0}f{sub(/10/,"172");print \$2}\$1=="dmfe0:"{f=1}'\`
EOF
done < /data/serverlist

If ifconfig output is different in each box, then the command might need modifications. There are quite a few threads here that deal with this issue.