Directory

For ELB and RDS you don't need to define the instance_id so updated code to take hostname and shorten it for the elb/rds name. You can then use $HOSTNAME$ in the Nagios service check

check_cloudwatch_status.rb! YOURPATH/nagios/plugins/check_cloudwatch_status.rb -a $HOSTNAME$ -f ec2_credentials.cfg -L RequestCount -S Sum

line 348 :-

if namespace.eql?(AWS_NAMESPACE_EC2)
dimensions = "InstanceId=#{instance_id}"
elsif namespace.eql?(AWS_NAMESPACE_RDS)
# Strip off the name from the address
instance_id, *restofvalues = address.split('.')
instance_id = instance_id.split('-')[0...-1].join('-')
dimensions = "DBInstanceIdentifier=#{instance_id}"
elsif namespace.eql?(AWS_NAMESPACE_ELB)
# Strip off the name Load-Balancer-Name from the address Load-Balancer-Name-123456789.elb.amazon.com
instance_id, *restofvalues = address.split('.')
instance_id = instance_id.split('-')[0...-1].join('-')
dimensions = "LoadBalancerName=#{instance_id}"
end