EQS 업무. 서버 Bootstrap 후 초기 설정 스크립트.

cwrk_change-hostname-and-ip.sh

#!/usr/bin/env bash
set -euo pipefail

NEW_HOSTNAME="" # Jira에 있는 Hostname 양식 참고.
NEW_IPADDR="10.128.40.50/22"
NEW_GW="10.128.40.254"
NEW_DNS="8.8.8.8 1.1.1.1"

require_root() {
  if [[ $EUID -ne 0 ]]; then
    echo "ERR require root perm"
    exit 1
  fi
}

detect_connection() {
  local con
  con=$(nmcli -t -f NAME,DEVICE,STATE connection show --active \
        | awk -F: '$3=="activated"{print $1; exit}')
  if [[ -z "$con" ]]; then
    echo "ERR no active network connection"
    exit 1
  fi
  echo "$con"
}

set_hostname() {
  echo "changing hostname to ${NEW_HOSTNAME}"
  hostnamectl set-hostname "${NEW_HOSTNAME}"
}

set_static_ip() {
  local con="$1"
  echo "changing ip address to ${NEW_IPADDR}"

  nmcli connection modify "${con}" ipv4.method manual
  nmcli connection modify "${con}" ipv4.addresses "${NEW_IPADDR}"
  nmcli connection modify "${con}" ipv4.gateway "${NEW_GW}"
  nmcli connection modify "${con}" ipv4.dns "${NEW_DNS}"

  echo "restarting network"
  nmcli connection down "${con}" || true
  nmcli connection up "${con}"

  echo "applied"
  nmcli -f GENERAL.DEVICE,GENERAL.CONNECTION,IP4.ADDRESS,IP4.GATEWAY device show \
    | sed -n '1,80p'
}

main() {
  require_root
  local con
  con="$(detect_connection)"

  set_hostname
  set_static_ip "${con}"

  echo "completed"
  hostnamectl status | sed -n '1,10p'
}

main "$@"