Configuration

#!/usr/bin/env bash
# Setup global variables.
APP=atlas-hub
SOURCE=https://api.github.com/repos/atlas-bi/Hub/tarball
# load config
NGINX_FILE="$APP.conf"
PM2_PREFIX="$APP"
if [[ -f "installer.conf" ]]; then
. installer.conf
fi
# Setup basic colors
color() {
  YELLOW=$(printf '\033[1m\033[33m')
  BLUE=$(printf '\033[1m\033[34m')
  RED=$(printf '\033[1m\033[31m')
  RESET=$(printf '\033[0m') # No Color
  GREEN=$(printf '\033[1m\033[32m')
  CYAN=$(printf '\033[1m\033[36m')
  BOLD=$(printf '\033[1m')
}

color

fmt_yellow() {
  echo "${YELLOW}$1${RESET}"
}
fmt_red() {
  echo "${RED}$1${RESET}"
}
fmt_blue() {
  echo "${BLUE}$1${RESET}"
}
fmt_green() {
  echo "${GREEN}$1${RESET}"
}
fmt_cyan() {
  echo "${BLUE}$1${RESET}"
}
check_command() {
  if ! [ -x "$(command -v $1)" ]; then
    fmt_red "Error: $1 is not installed. ${GREEN}See https://atlas.bi/docs/" >&2
    exit 1
  fi
}

warn_command() {
  if ! [ -x "$(command -v $1)" ]; then
    fmt_cyan "$2" >&2
  fi
}

check_file() {
  if ! [[ -n $(compgen -G $1) ]]; then
    fmt_red "File $1 must be created before running this script. ${GREEN}See https://atlas.bi/docs/" >&2
    exit 1
  fi
}

exporter() {
  echo $1 | tee -a .env .env.local >/dev/null
}
random_number() {
  floor=3000
  range=3999
  number=0
  while [ "$number" -le $floor ]
  do
    number=$RANDOM
    let "number %= $range"
  done
  echo $number
}

get_port() {
  PORT=$(random_number)
  while [[ $(lsof -i -P -n | grep :$PORT) ]]
  do
    PORT=$(random_number)
  done
  echo $PORT
}
# from https://dev.to/justincy/blue-green-node-js-deploys-with-nginx-bkc
nginx_workers() {
  echo $(ps -ef | grep "nginx: worker process" | grep -v grep | wc -l)
}

nginx_reload() {
  numWorkerProcesses=$(nginx_workers)
  nginx -s reload

  # Wait for the old nginx workers to be retired before we kill the old server.
  while [ $(nginx_workers) -ne $numWorkerProcesses ]
  do
    sleep 1;
  done;
}
set -Eeuo pipefail
trap cleanup SIGINT SIGTERM ERR EXIT

configure(){
    check_file config_cust.py

    fmt_yellow "Update config_cust.py file in site.."

    pm2 list | grep -oP "$PM2_PREFIX-((runner|scheduler)-)?\d+" | uniq | grep -oP "\d+" | uniq  | while IFS=$'\n' read DIRECTORY; do
      if [ -d "$DIRECTORY" ]; then

        # get old ports
        SCHEDULER=$(cat "$DIRECTORY/config_cust.py" | grep -oE "SCHEDULER_HOST.*?" | sed 's/\//\\\//g')
        RUNNER=$(cat "$DIRECTORY/config_cust.py" | grep -oE "RUNNER_HOST.*?" | sed 's/\//\\\//g')

        cp config_cust.py $DIRECTORY
        sed -i "s/SCHEDULER_HOST.*/${SCHEDULER}/g" "$DIRECTORY/config_cust.py"
        sed -i "s/RUNNER_HOST.*/${RUNNER}/g" "$DIRECTORY/config_cust.py"
      fi
    done

    fmt_yellow "Restarting processes.."
    pm2 list | grep -oP "$PM2_PREFIX-((runner|scheduler)-)?\d+" | uniq | while IFS=$'\n' read process; do
      pm2 restart $process
    done
}

usage() {
  cat << EOF

${BOLD}Usage: $(basename "${BASH_SOURCE[0]}") [-h, -b, -c, -u]

${BLUE}Atlas Hub Installer.${RESET}

Available options:

    -h, --help               Print this help and exit
    -c, --configure          Reconfigure Atlas Hub
    -i, --install [DEFAULT]  Install or Upgrade Atlas Hub

Additional Altas Hub Help at https://atlas.bi/docs/hub

EOF
  exit
}

install() {
  # Check if commands and files exist.
check_command node
check_command npm
check_command curl
check_command pm2
check_command nginx
check_command lsof
check_command grep
check_command poetry
check_file config_cust.py
check_file "/etc/nginx/**/$NGINX_FILE"

# Get free internal ports.
fmt_yellow "Finding free ports.."

PORT=$(get_port)
RUNNER_PORT=$(get_port)
SCHEDULER_PORT=$(get_port)

fmt_blue "Using web port $PORT"
fmt_blue "Using runner port $RUNNER_PORT"
fmt_blue "Using scheduler port $SCHEDULER_PORT"

# Download the latest release.
fmt_yellow "Downloading latest version into $(pwd)/$PORT.."

mkdir "$PORT"
curl -sSL "$SOURCE" | tar zxf - -C "$PORT" --strip-components=1
cd "$PORT"

fmt_blue "Downloaded version $(npm pkg get version | tr -d '"')"

# Copy in the .env file.
fmt_yellow "Setting up configuration.."
cp ../config_cust.py .

# update ports
sed -i "s/SCHEDULER_HOST.*/SCHEDULER_HOST = \"http:\/\/127.0.0.1:${SCHEDULER_PORT}\/api\"/g" config_cust.py
sed -i "s/RUNNER_HOST.*/RUNNER_HOST = \"http:\/\/127.0.0.1:${RUNNER_PORT}\/api\"/g" config_cust.py

# make log dirs
mkdir -p logs


fmt_yellow "Installing python packages.."
poetry config --local virtualenvs.in-project true
poetry config --local virtualenvs.create true
poetry install --only main

export FLASK_ENV=production
export FLASK_DEBUG=0

fmt_yellow "Installing node packages and building static resources.."
npm install --loglevel error --no-fund --no-audit
.venv/bin/flask --app=web assets build


# Apply database migrations.
fmt_yellow "Applying database migrations.."
cp web/model.py runner/model.py
cp web/model.py scheduler/model.py

.venv/bin/flask --app=web db upgrade
.venv/bin/flask --app=web cli seed

# Set a few process names.
APP_PROCESS="$PM2_PREFIX-$PORT"
RUNNER_PROCESS="$PM2_PREFIX-runner-$RUNNER_PORT"
SCHEDULER_PROCESS="$PM2_PREFIX-scheduler-$SCHEDULER_PORT"


fmt_yellow "Starting new services.."

APP_CMD=".venv/bin/gunicorn --worker-class=gevent --workers 3 --threads 30 --timeout 999999999 --access-logfile $(pwd)/logs/access.log --error-logfile $(pwd)/logs/error.log --capture-output --bind 0.0.0.0:$PORT --umask 007 web:app"
SCHEDULER_CMD=".venv/bin/gunicorn --worker-class=gevent --workers 1 --threads 30 --timeout 999999999 --access-logfile $(pwd)/logs/access.log --error-logfile $(pwd)/logs/error.log --capture-output --bind  0.0.0.0:$SCHEDULER_PORT --umask 007 scheduler:app"
RUNNER_CMD=".venv/bin/gunicorn --worker-class=gevent --worker-connections=1000 --workers $(nproc --all) --threads 30 --timeout 999999999 --access-logfile $(pwd)/logs/access.log --error-logfile $(pwd)/logs/error.log --capture-output --bind 0.0.0.0:$RUNNER_PORT --umask 007 runner:app"

echo $APP_CMD

pm2 start "$APP_CMD" --name="$APP_PROCESS"
pm2 start "$SCHEDULER_CMD" --name="$SCHEDULER_PROCESS"
pm2 start "$RUNNER_CMD" --name="$RUNNER_PROCESS"

fmt_blue "Done setting up."

cd ..

fmt_yellow "Updating nginx.."
sed -i "s/localhost:3[0-9]*/localhost:${PORT}/" `find -L /etc/nginx -name "$NGINX_FILE"`

fmt_yellow "Gracefully reloading nginx..."
nginx_reload

fmt_yellow "Removing old pm2 processes.."

# gnu grep
pm2 list | grep -oP "$PM2_PREFIX-((runner|scheduler)-)?\d+" | uniq | while IFS=$'\n' read process; do
  if [[ $process != $APP_PROCESS && $process != $RUNNER_PROCESS && $process != $SCHEDULER_PROCESS ]];
  then
    fmt_yellow "Removing $process"
    pm2 delete $process || true
  fi
done

pm2 save

fmt_yellow "Archiving old installs.."

for olddir in $(ls -d 3*); do
  if [[ $olddir != $PORT ]];
  then
    fmt_yellow "Moving $olddir"
    mv -f $olddir "backup-$olddir"
  fi
done;

fmt_blue "Finished cleaning up."

fmt_green "Thanks for installing Atlas Hub!"
echo ""
fmt_green "Read the full install guide at https://atlas.bi/docs/hub/"
echo ""
fmt_blue "Next Steps"
echo ""
fmt_cyan "Remove Backups"
echo ""
echo ${YELLOW}Back folders can be manually removed. ${BLUE}rm -r $(pwd)/backup-*
echo ""

cat <<EOF
${CYAN}Current Configuration

${YELLOW}Web process was started with ${BLUE}pm2 start "$APP_CMD" --name="$APP_PROCESS"
${YELLOW}Scheduler process was started with ${BLUE}pm2 start "$SCHEDULER_CMD" --name="$SCHEDULER_PROCESS"
${YELLOW}Runner process was started with ${BLUE}pm2 start "$RUNNER_CMD" --name="$RUNNER_PROCESS"

${CYAN}Updating App Settings

${YELLOW}1. Update user configuration file ${BLUE}nano $(pwd)/config_cust.py
${YELLOW}2. Reconfigure with ${BLUE}curl -sSL https://atlas.bi/installers/hub.sh | bash -s -- --configure

${CYAN}Updating Nginx Settings

${YELLOW}1. Update configuration file ${BLUE}nano $(find -L /etc/nginx -name "$NGINX_FILE")
${YELLOW}2. Reload nginx ${BLUE}nginx -s reload

${CYAN}Monitoring and Viewing Logs

${YELLOW}Live Logging ${BLUE}pm2 monit
${YELLOW}Log files can be viewed in the $(pwd)/$PORT/logs folder.

${RESET}
EOF

warn_command ufw "Recommendation: secure your server with ufw!"
echo ""

}

cleanup() {
  trap - SIGINT SIGTERM ERR EXIT
}

die() {
  echo >&2 -e "${1-}"
  exit 1
}

# https://betterdev.blog/minimal-safe-bash-script-template/
parse_params() {
  while :; do
    case "${1-}" in
    -h | --help) usage;break ;;

    -c | --configure) configure;break ;;
    -i | --install) install;break ;;
    -?*) die "${RED}Unknown option: $1. Run $(basename "${BASH_SOURCE[0]}") -h for help.${RESET}";break ;;
    *)  install;break ;;
    esac
    shift
  done

  return 0
}

parse_params "$@"