Docker custom upstart script

docker-upstart-script

#!/bin/bash

# /root/upstart-script
# Add line bellow to /etc/bash.bashrc in Docker container
# cat /root/upstart-script | bash

is_sudoer() {
  if [ $UID -ne 0 ]; then
    echo "Please run this script with sudo permission"
    exit 1
  fi
}

is_sudoer

get_pid() {
  ps ax | grep "$1" | awk '{print $1}'
}

is_running() {
  pid=$(get_pid "$1")
  kill -0 "$pid" > /dev/null 2>&1
  echo $?
}

nginx=$(is_running "[n]ginx: master")
crond=$(is_running "[c]ron")
sshd=$(is_running "[s]bin/sshd")

if [ "$nginx" -ne "0" ]; then
  service nginx start
fi

if [ "$crond" -ne "0" ]; then
  service cron start
fi

if [ "$sshd" -ne "0" ]; then
  service ssh start
fi