#! /bin/sh

servers="server_1 server_2 server_3 server_4 server_5 server_6 server_7 server_8 server_9 server_10 server_11 server_12 server_13 server_14 server_15 server_16 server_17 server_18 server_19 server_20 server_21 server_22 server_23 server_24 server_25 server_26 server_27 server_28 server_29 server_30"

deployment_task() {
    echo "scp /path/to/artifact user@${server}"
    do_something_else
}

do_something_else(){
    # TODO: Another method here
    echo "testing"
}

for server in ${servers}; do 
    # if needed, add some multi-process logic here
    # maybe with a maximum number of processes
    # to avoid stalling the server

    echo "deploy to ${server}";
    deployment_task;
done