// using goamz grab a region
region := ec2.New(aws.Auth{
     AccessKey: "XXXXXXX",
     SecretKey: "XXXXXXX",
}, Instance_Region)

// get a list of public dns names by the server’s class
servers := pd.GetPublicDNS(region, Instance_ClassName)

// build a pool of servers and specify the concurrency
pool := pd.NewPool(Instance_User, Instance_PubKey, servers, DefaultConcurrency)

// build the target binary
pd.BuildGoBinary("$GOPATH/src/github.com/prevoty/testapp", "testapp", "linux", "amd64")

// ensure all ports are open
pool.WaitForPort(22)

// push the new binary
pd.Must(pool.Rsync("-az", "$GOPATH/src/github.com/prevoty/testapp/testapp", "/var/testapp/testapp"))
pd.Must(pool.Sudo("restart testapp")