simple `serf` agent launch script

run-serf-agent.sh

#!/bin/sh

n=$1
args=$(echo $@ | sed -e "s/^$1//g")

if [ "$(uname)" == "Darwin" ];then
    ips=$(ifconfig | grep '\<inet\>' | awk '{print $2}')
    for i in $ips
    do
        echo $i | grep '^127\.' &>/dev/null
        if [ $? -eq 0 ];then
            continue
        fi
        ip=$i
        break
    done
else
    ip=$(ip addr show eth0 | grep '\<inet\>' | awk '{print $2}' | sed -s 's/\/.*//g')
fi

node="machine${n}"
port_node=$(expr 7900 + $n)
port_rpc=$(expr 7300 + $n)
args_join=""

if [ $n -ne 0 ];then
    args_join="-join=$ip:$(expr $port_node - 1)"
fi

serf \
    agent \
    -log-level=debug \
    -node=$node \
    -bind=${ip}:${port_node} \
    -rpc-addr=${ip}:${port_rpc} \
    $args_join \
    $args