centos7-provision.sh

#!/bin/bash
#
# File: centos7-provision.sh
# Description: Installs jazz prerequisites on a Centos7 ec2-instance.
#              if you already have the prerequisites installed, just run Installer.sh
#              directly from the from the cloned jazz-installer folder.
# Variables section

# Disable shellcheck warnings about sudo and output redirection, doesn't apply here
# shellcheck disable=SC2024

#TODO consider using pyenv

TERRAFORM_URL="https://releases.hashicorp.com/terraform/0.11.13/terraform_0.11.13_linux_amd64.zip"
ATLASSIAN_CLI_URL="https://bobswift.atlassian.net/wiki/download/attachments/16285777/atlassian-cli-6.7.1-distribution.zip"
INSTALLER_GITHUB_URL="https://github.com/tmobile/jazz-installer.git"

# Installation directory
INSTALL_DIR=$(pwd)

#Since Centos/RH use nonstandard Python3 executable naming, define it here
PYEXE='python36'

# Log file to record the installation logs
LOG_FILE_NAME=provision_setup.out
LOG_FILE=$(realpath "$INSTALL_DIR"/"$LOG_FILE_NAME")
JAZZ_INSTALLER_BRANCH="master"

# Default verbosity of the installation
VERBOSE=0

NC='\033[0m'
GREEN='\033[0;32m'
RED='\033[0;31m'

print_info()
{
  # shellcheck disable=SC2059
  printf "\\r${GREEN}$1${NC}\\n" 1>&3 2>&4
}

print_error()
{
  # shellcheck disable=SC2059
  printf "\\r${RED}$1${NC}\\n" 1>&3 2>&4
}

#Spin wheel
function spin_wheel () {
  pid=$1 # Process Id of the previous running command
  message=$2
  spin='-\|/'
  printf "\\r%s...." "$message" 1>&3 2>&4
  i=0

  while ps -p "$pid" > /dev/null
  do
    i=$(( (i+1) %4 ))
    # shellcheck disable=SC2059
    printf "\\r${GREEN}$message....${spin:$i:1}" 1>&3 2>&4
    sleep .05
  done

  while s=$(ps -p "$pid" -o s=) && [[ "$s" && "$s" != 'Z' ]]; do
    sleep 1
  done
  exitcode=$?
  if [ $exitcode -gt 0 ]
  then
    print_error "$message....Failed"
    exit
  else
    print_info "$message....Completed"

  fi
}
trap 'printf "${RED}\nCancelled....\n${NC}" 1>&3 2>&4; exit' 2
trap '' SIGTSTP

function install_packages () {
  # Download and Installing Softwares required for Jazz centos7-provision
  # Java JDK
  # Unzip
  # Terraform
  # Atlassian CLI
  # Python36
  # Python requirements from requirements.txt

  #Fork output redirection so we can control output if VERBOSE is set
  exec 3>&1
  exec 4>&2

  # print verbosity mode during installation
  if [ "$1" == 1 ]; then
    print_info "You have started the installer in verbose mode" 1>&3 2>&4
  elif [ "$1" == 0 ]; then
    # Redirecting the stdout and stderr to /dev/null for non-verbose installation
    exec 1>/dev/null
    exec 2>/dev/null
    print_info "You have started the installer in non-verbose mode" 1>&3 2>&4
  fi
  print_info "You may view the detailed installation logs at $LOG_FILE" 1>&3 2>&4

  # Install epel, we pull up-to-date java+python3 from it.
  sudo yum install epel-release -y &> /dev/null &
  spin_wheel $! "Installing epel"

  # Install git
  if command -v git > /dev/null; then
    print_info "Git already installed, using it"
  else
    sudo yum install -y git >> "$LOG_FILE" &
    spin_wheel $! "Installing git"
  fi

  # Download and Install java
  if command -v java > /dev/null; then
    print_info "Java already installed, using it"
  else
    sudo yum install -y java-1.8.0-openjdk >> "$LOG_FILE" &
    spin_wheel $! "Installing Java 1.8"
  fi

  #TODO is this required? it shouldn't be
  # Download and Install jq
  if command -v jq > /dev/null; then
    print_info "JQ already installed, using it"
  else
    sudo yum install -y jq >> "$LOG_FILE" &
    spin_wheel $! "Installing jq"
  fi

  # Download and Install unzip
  if command -v unzip > /dev/null; then
    print_info "Unzip already installed, using it"
  else
    sudo yum install -y unzip >> "$LOG_FILE" &
    spin_wheel $! "Installing unzip"
  fi

  # Create a temporary folder .
  # Here we will have all the temporary files needed and delete it at the end
  sudo rm -rf "$INSTALL"_DIR/jazz_tmp
  mkdir "$INSTALL_DIR"/jazz_tmp

  #Download and Install Terraform
  curl -v -L "$TERRAFORM_URL" -o "$INSTALL_DIR"/jazz_tmp/terraform.zip >> "$LOG_FILE" &
  spin_wheel $! "Downloading terraform"
  sudo unzip -o "$INSTALL_DIR"/jazz_tmp/terraform.zip -d /usr/bin >> "$LOG_FILE" &
  spin_wheel $! "Installing terraform"

  #Downloading and Install atlassian-cli
  curl -L "$ATLASSIAN_CLI_URL" -o "$INSTALL_DIR"/jazz_tmp/atlassian-cli-6.7.1-distribution.zip >> "$LOG_FILE" &
  spin_wheel $! "Downloading atlassian-cli"
  unzip -o "$INSTALL_DIR"/jazz_tmp/atlassian-cli-6.7.1-distribution.zip -d "$INSTALL_DIR"/jazz_tmp/ >> "$LOG_FILE" &
  spin_wheel $! "Fetching atlassian-cli"

  # Installing python36+
  if command -v $PYEXE > /dev/null; then
    print_info "python already installed, using it"
  else
    sudo yum install python36 -y >> "$LOG_FILE" &
    spin_wheel $! "Installing python36"
  fi

  #Download and install pip
  if command -v $PYEXE -m pip > /dev/null; then
    print_info "pip already installed, using it"
  else
    sudo easy_install-3.6 pip >> "$LOG_FILE" &
    spin_wheel $! "Installing pip"
  fi

  $PYEXE -m pip install --user virtualenv >> "$LOG_FILE" &
  spin_wheel $! "Installing virtualenv"

  $PYEXE -m virtualenv jazzenv >> "$LOG_FILE" &
  spin_wheel $! "Creating virtualenv"

  # shellcheck disable=SC1091
  source jazzenv/bin/activate

  #Get Jazz installer code base
  if [ -z "$JAZZ_INSTALLER_BRANCH" ]; then
    echo "Jazz branch to clone"
    print_info "Skipping installer repo clone based on CLI flag"
  else
    sudo rm -rf jazz-installer
    git clone -b "$JAZZ_INSTALLER_BRANCH" "$INSTALLER_GITHUB_URL" --depth 1 >> "$LOG_FILE" &
    spin_wheel $! "Fetching jazz-installer repo"
  fi

  # If you're running this standalone, you'll need the subfolder
  if [ -e jazz-installer/requirements.txt ]
  then
    pip install -r jazz-installer/requirements.txt >> "$LOG_FILE" &
    spin_wheel $! "Installing pip dependencies"
  else
    pip install -r requirements.txt >> "$LOG_FILE" &
    spin_wheel $! "Installing pip dependencies"
  fi

  #Undo output redirection and close unused file descriptors.
  exec 1>&3 3>&-
  exec 2>&4 4>&-
}

# Running the selector
while [ $# -gt 0 ] ; do
  case "$1" in
    -h|--help)
      echo "Installs jazz prerequisites on a Centos7 ec2-instance."
      echo ""
      echo "./centos7-provision.sh [options]"
      echo ""
      echo "options:"
      echo "-ib, --installer-branch                     [optional] centos7-provision repo branch to use. Defaults to 'master'"
      echo "-nc, --no-clone                             [optional] Skip cloning the jazz-installer repo into the current directory. Default: repo is cloned."
      echo "-v, --verbose 1|0                           [optional] Enable/Disable verbose centos7-provision logs. Default:0(Disabled)"
      echo "-t, --tags Key=stackName,Value=production   [optional] Specify as space separated key/value pairs"
      echo "-h, --help                                  [optional] Describe help"
      exit 0 ;;

    -ib|--installer-branch)
      shift
      if [ ! -z "$1" ] ; then
        JAZZ_INSTALLER_BRANCH="$1"
      else
        echo "No arguments supplied for installer branch name."
        echo "Usage: ./centos7-provision.sh -ib installer_branch_name"
        exit 1
      fi
      shift ;;

    -nc|--no-clone)
      shift
      JAZZ_INSTALLER_BRANCH=''
      shift ;;

    -v|--verbose)
      shift
      if [[ ("$#" -gt 0) && ("$1" == "1") ]] || [[ ("$#" -gt 0) && ("$1" == "0") ]] ; then
        VERBOSE="$1"
      else
        echo "Please specify 1 or 0 for verbosity. Enable/Disable verbose centos7-provision logs. Default:0(Disabled)"
        echo "Usage: ./centos7-provision --verbose 1"
        exit 1
      fi
      shift ;;

    -t|--tags)
      shift
      while [ "$#" -gt 0 ] ; do
        if [[ "$1" =~ Key=.*,Value=.* ]] && [[ ! "$1" =~ ";" ]] ; then
          arr+=("$1")
        elif [[ $1 == -* ]] ; then break
        else
          echo "Please specify tags in format: Key=stackName,Value=production"
          echo "Usage: ./centos7-provision --tags Key=stackName,Value=production Key=department,Value=devops"
          exit 1
        fi
        shift
      done ;;

    *)
      echo "Invalid flag!"
      echo "Please run './centos7-provision.sh -h' to see all the available options."
      exit 1 ;;
  esac
done

install_packages "$VERBOSE"