Deploy: Script to install appimage sysd service that runs on boot

deployment_scripts/install-infection-monkey-service.sh

@@ -0,0 +1,138 @@
+#!/bin/bash
+
+set -e
+
+SCRIPT_DIR="$(realpath $(dirname $BASH_SOURCE[0]))"
+SYSTEMD_UNIT_FILENAME="monkey-appimage.service"
+SYSTEMD_DIR="/lib/systemd/system"
+MONKEY_BIN="/opt/infection-monkey/bin"
+APPIMAGE_NAME="InfectionMonkey.appimage"
+
+echo_help() {
+  echo "usage: install-infection-monkey-service.sh [--user <NAME> --appimage <PATH>] [--help] [--uninstall]"
+  echo ""
+  echo "Installs Infection Monkey AppImage and systemd unit to run on boot"
+  echo "--user                          User to run the AppImage as"
+  echo "--appimage                      Path to the AppImage"
+  echo "--uninstall                     Uninstall Infection Monkey AppImage systemd service"
+}
+
+service_install() {
+  cat > "${SCRIPT_DIR}/${SYSTEMD_UNIT_FILENAME}" << EOF
+[Unit]
+Description=Infection Monkey AppImage Runner
+After=network.target
+
+[Service]
+User=$1
+Type=simple
+ExecStart="${MONKEY_BIN}/${APPIMAGE_NAME}"
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+  sudo mv "${SCRIPT_DIR}/${SYSTEMD_UNIT_FILENAME}" "${SYSTEMD_DIR}/${SYSTEMD_UNIT_FILENAME}"
+
+  # Enable on boot
+  sudo systemctl enable "${SYSTEMD_UNIT_FILENAME}" &>/dev/null
+  sudo systemctl daemon-reload
+}
+
+service_uninstall() {
+  echo "Uninstalling Infection Monkey AppImage systemd service..."
+
+  if [ -f "${MONKEY_BIN}/${APPIMAGE_NAME}" ] ; then
+    sudo rm -f "${MONKEY_BIN}/${APPIMAGE_NAME}"
+  fi
+
+  if [ -f "${SYSTEMD_DIR}/${SYSTEMD_UNIT_FILENAME}" ] ; then
+    sudo systemctl stop "${SYSTEMD_UNIT_FILENAME}" 2>/dev/null
+    sudo systemctl disable "${SYSTEMD_UNIT_FILENAME}" &>/dev/null
+    sudo rm "${SYSTEMD_DIR}/${SYSTEMD_UNIT_FILENAME}"
+    sudo systemctl daemon-reload
+  fi
+
+  exit 0
+}
+
+has_sudo() {
+  # 0 true, 1 false
+  sudo -nv > /dev/null 2>&1
+  return $?
+}
+
+exit_if_missing_argument() {
+  if [ -z "$2" ] || [ "${2:0:1}" == "-" ]; then
+    echo "Error: Argument for $1 is missing" >&2
+    exit 1
+  fi
+}
+
+uname=""
+appimage_path=""
+
+while (( "$#" )); do
+  case "$1" in
+    --user)
+      exit_if_missing_argument "$1" "$2"
+
+      uname=$2
+      shift 2
+      ;;
+    --appimage)
+      exit_if_missing_argument "$1" "$2"
+
+      appimage_path=$2
+      shift 2
+      ;;
+    --uninstall)
+      service_uninstall
+      ;;
+    -h|--help)
+      echo_help
+      exit 0
+      ;;
+    *)
+      echo "Error: Unsupported parameter $1" >&2
+      exit 1
+      ;;
+  esac
+done
+
+if ! has_sudo; then
+  echo "Error: You need root permissions for some of this script operations. \
+Run \`sudo -v\`, enter your password, and then re-run this script."
+  exit 1
+fi
+
+# input sanity
+if [ -z "$uname" ] || [ -z "$appimage_path" ] ; then
+  echo "Error: missing flags"
+  echo_help
+  exit 1
+fi
+
+# specified user exists
+if ! id -u "$uname" &>/dev/null ; then
+  echo "Error: User does not exist '${uname}'"
+  exit 1
+fi
+
+# appimage path exists
+if [ ! -f "${appimage_path}" ] ; then
+  if [ ! -f "${SCRIPT_DIR}/${appimage_path}" ] ; then
+    echo "Error: AppImage path does not exist: '${appimage_path}'"
+    exit 1
+  fi
+  appimage_path="${SCRIPT_DIR}/${appimage_path}"
+fi
+
+# move appimge to dst dir
+sudo mkdir -p "${MONKEY_BIN}"
+if [ "$appimage_path" != "${MONKEY_BIN}/${APPIMAGE_NAME}" ] ; then
+  sudo cp "$appimage_path" "${MONKEY_BIN}/${APPIMAGE_NAME}"
+fi
+
+service_install "${uname}"
+echo "Installation done. "