deploy-rh

#!/usr/bin/env bash

##--------------------------------------------------------------------
## Copyright (c) 2019 Dianomic Systems Inc.
##
## Licensed under the Apache License, Version 2.0 (the "License");
## you may not use this file except in compliance with the License.
## You may obtain a copy of the License at
##
##     http://www.apache.org/licenses/LICENSE-2.0
##
## Unless required by applicable law or agreed to in writing, software
## distributed under the License is distributed on an "AS IS" BASIS,
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
## See the License for the specific language governing permissions and
## limitations under the License.
##--------------------------------------------------------------------
##
## Author: Mohd. Shariq
##

set -e

__version__="2.5.0"
if [ -f "package.json" ];
  then
	__version__=`cat package.json | grep version | head -1 | awk -F: '{ print $2 }' | sed 's/[" ,]//g'`
fi

FLEDGE_GUI_VER=${__version__}

# Colors
CPFX="\033["

CRESET="${CPFX}0m"          # Text Reset
CERR="${CPFX}1;31m"
CINFO="${CPFX}1;32m"
CWARN="${CPFX}0;33m"

echo -e "${CWARN}This script is partially done, please track https://github.com/fledge/fledge-gui/issues/73 ${CRESET}"

compat_msg="This script is compatible with Red Hat Linux Only!"

os=$(uname)
if [[ $os != "Linux" ]]; then
  echo -e "${CERR}${compat_msg}${CRESET}"
  exit 1;
fi

if [ -f /etc/os-release ]; then
  n=$(cat /etc/os-release  | grep -w PRETTY_NAME | cut -d= -f2- | tr -d '"')
  if [[ $n == *"Red Hat"* ]] || [[ $n == *"CentOS"* ]]; then
    echo -e "${CINFO}${n} ${CRESET}"
  else
    echo -e "${CWARN}${n} ${CRESET}"
    echo -e "${CERR}${compat_msg} ${CRESET}"
    exit 1;
  fi
else
  echo -e "${CERR}${compat_msg}${CRESET}"
  exit 1;
fi

DOC_ROOT="/usr/share/nginx/html"
echo -e WARNING: "${CWARN}This script will remove all the contents of ${DOC_ROOT} ${CRESET}"
read -p "Continue? Press n or N to exit." -n 1 -r
echo    # (optional) move to a new line
if [[ $REPLY =~ ^[Nn]$ ]]
then
    exit 0;
fi

machine_details() {
  echo -e "${CINFO}Hostname : ${CRESET} ${HOSTNAME} "

  internal_ip=$(hostname -I)
  echo -e "${CINFO}IP : ${CRESET} ${internal_ip}"
}

memory_footprints(){
  # Check RAM and SWAP Usages
  rm -f /tmp/ramcache
  free -h | grep -v + > /tmp/ramcache

  echo -e "${CINFO}Memory Usages : ${CRESET}"
  cat /tmp/ramcache
  echo     # new line

  rm -f /tmp/diskusage
  df -T -h > /tmp/diskusage
  echo -e "${CINFO}Disk Usages : ${CRESET}"
  cat /tmp/diskusage
  echo     # new line
}

nginx_health(){
  if ! which nginx > /dev/null 2>&1; then
    echo -e "${CERR} Fledge GUI can not run, As Nginx is not installed.${CRESET}"
    echo -e "${CINFO} Run ./deploy-rh without any argument to install the fledge gui with nginx.${CRESET}"
  else
    machine_details

    memory_footprints

    nginx_version=$(nginx -v 2>&1)
    echo -e INFO: "${CINFO}Found ${nginx_version}${CRESET}"

    nginx_status=$(sudo service nginx status | grep active 2>&1)
    echo -e "${CINFO}Status: ${nginx_status}${CRESET}"

    echo "USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND"
    ps aux -P | grep [n]ginx
  fi
}

install_epel () {
  echo -e INFO: "${CINFO} Installing epel-release ... ${CRESET}"
  sudo rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
  sudo yum -y update
  sudo yum -y install epel-release
}

check_install_nginx () {
  if ! which nginx > /dev/null 2>&1; then
      echo -e WARNING: "${CWARN} Nginx not installed! ${CRESET}"
      if rpm -q epel-release > /dev/null 2>&1;
      then
        sudo yum remove epel-release*.noarch
        sudo rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
      else
        install_epel
      fi

      EPEL=$(rpm -qa | grep epel)
      echo $EPEL

      echo -e INFO: "${CINFO} Installing nginx ... ${CRESET}"
      sudo yum -y install nginx
  else
      nginx_version=$(nginx -v 2>&1)
      echo -e INFO: "${CINFO} Found ${nginx_version} ${CRESET}"
  fi
}

install () {
  check_install_nginx

  sudo systemctl stop nginx

  # Download fledge-gui build artifacts i.e. dist directory compressed file
  # url e.g. http://192.168.1.120/fledge-gui-${FLEDGE_GUI_VER}.tar.gz
  # github release https://github.com/fledge/fledge-gui/releases/download/v1.2.0/fledge-gui-1.2.0.tar.gz
  # wget ${BUILD_URL}

  # FIXME: scp fledge-gui-${FLEDGE_GUI_VER}.tar.gz pi@<IP>:/home/user
  tar -zxvf fledge-gui-${FLEDGE_GUI_VER}.tar.gz

  # put them into /usr/share/nginx/html and start nginx
  sudo rm -rf ${DOC_ROOT}/*
  sudo mv dist/* ${DOC_ROOT}/.
  sudo rm -rf dist

  # FIXME: if --keep, then don't remove
  sudo rm -rf fledge-gui-${FLEDGE_GUI_VER}.tar.gz

  # sudo sed -i 's/dist/\/usr\/share\/nginx\/html/g' ${DOC_ROOT}/nginx.conf
  sudo cp ${DOC_ROOT}/fledge.html ${DOC_ROOT}/index.html
  restorecon -v ${DOC_ROOT}/* | grep fledge.html

  sudo systemctl start nginx
  sudo systemctl status nginx | grep "Active:"

  echo -e "${CINFO} Done. ${CRESET}"
}

############################################################
# Usage text for this script
############################################################
USAGE="${__version__}

DESCRIPTION
  This script installs fledge-gui with nginx-light

OPTIONS
  Multiple commands can be specified but they all must be
  specified separately (-hv is not supported).

  -h, --help                Display this help text
  -v, --version             Display this script's version information
  -H, --health, --dry-run   Run health check for nginx
  -L, --local               Deploy on local with an internal call to ./build


EXAMPLE
  $0 --version"

############################################################
# Execute the command specified in $OPTION
############################################################
execute_command() {

  if [[ "$OPTION" == "HELP" ]]
  then
    echo "${USAGE}"

  elif [[ "$OPTION" == "VERSION" ]]
  then
    echo $__version__
  fi
}

start () {
  machine_details
  memory_footprints
  ./requirements
  ./build
  install
  memory_footprints
}

############################################################
# Process arguments
############################################################
if [ $# -gt 0 ]
then
  for i in "$@"
  do
    case $i in
      -h|--help)
        OPTION="HELP"
      ;;

      -v|--version)
        OPTION="VERSION"
      ;;

      *)
        echo "Unrecognized option: $i"
    esac
    execute_command
  done
else
  start
fi