Start and stop an Amazon EC2 server in EU region from Pallet

pallet-intro.clj

(defn start [config] 
  (pallet.core/converge
    (pallet.core/group-spec "mygroup"
     :count 1
     :node-spec (pallet.core/node-spec 
                     :image {:os-family :ubuntu} 
                     :location {:location-id "eu-west-1"}))  ;; :location-id is the name of the AWS Region
    :compute config))

(defn stop [config] 
  (pallet.core/converge 
    (pallet.core/group-spec "mygroup" :count 0) 
    :compute config))

;; Let's try it out....

;; You can get your Access Key credentials in the AWS web site under "My Account". 
(def cfg (pallet.configure/compute-service "aws-ec2" 
              :identity "____INSERT_YOUR_KEY____" 
              :credential "____INSERT_YOUR_SECRET_KEY___"))


(start cfg)
(stop cfg)