refresh.sh

#!/bin/bash
# refresh.sh - Quickly deploy some cloud servers on which to run playbooks
#
# Requires: rackspace-cli ( http://rackspace-cli.readthedocs.org/ )
# Usage: refresh.sh (create|destroy)
#
# Variables are read from this script instead of argv. Edit them until
# they match your environment
#
# BUG (possibly in rackspace-cli): Using --image-id with a custom image id
# results in an image not found error. Because of this, image names are
# used instead.

cache_file="/root/servers.list"
servers_to_create=2
servers_name_root="hostname_"
servers_image_name="image_template"
servers_flavor="general1-1"
servers_ssh_key="id_rsa"

case $1 in
create)
    if [ -f "${cache_file}" ]; then
        echo "Server cache file, ${cache_file}, exists. If no servers are online try removing it."
        exit 1
    fi
    for i in $(seq "${servers_to_create}"); do
        rack servers instance create --name ${servers_name_root}${i} --image-name ${servers_image_name} --flavor-id ${servers_flavor} --keypair ${servers_ssh_key}
    done | tee >(awk '/ID/ {print $2}' > "${cache_file}")
    ;;

destroy)
    if [ ! -f "${cache_file}" ]; then
        echo "Server cache file, ${cache_file}, doesn't exist. If servers are staged you will need to delete them manually."
        exit 1
    fi
    while read servers_uuid; do
        rack servers instance delete --id ${servers_uuid}
    done < "${cache_file}"
    rm -f ${cache_file}
    ;;

esac