1 #!/bin/bash
  2
  3 ##
  4 ## Create instances based on an AMI
  5 ##
  6
  7 set -u
  8 set -e
  9
 10 KEYPAIR="$1"
 11
 12 ## check if sshkey exists in the region
 13 check-key-pair() {
 14     cmd=(aws ec2 describe-key-pairs --key-names $1)
 15     ${cmd[@]} >/dev/null 2>&1
 16
 17     return $?
 18 }
 19
 20 keypair_exists="$(check-key-pair $KEYPAIR)"
 21 echo "keypair exists=$keypair_exists"