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dustincurrie/elb.sh

Created August 18, 2011 06:18
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Run a command on all instances attached to an AWS ELB
Raw
elb.sh
#!/bin/bash
# Runs a command on all instances attached to a load balancer
# Elastic Load Balancer Tools from http://aws.amazon.com/developertools/2536
ELB=prod-axs-aeg
COMMAND='service varnish restart'
INSTANCES=$(elb-describe-instance-health $ELB | awk -F " " '{print $2}')
for INSTANCEID in ${INSTANCES} ; do
INSTANCEURL=$(ec2-describe-instances $INSTANCEID | egrep '^INSTANCE' | awk -F " " '{print $4}')
$SSH -l root $INSTANCEURL $COMMAND
done
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