authoringBackup

#!/bin/bash

# Script to backup Adapt Authoring tool
# TODO should have check for disk space available and set a threshold

# Stop script on error
set -o errexit
# Stop script using undeclared variables
set -o nounset

# enter configuration values
# mongo database to be backed up
MONGO_DATABASE="adapt-tenant-db"
# app name, used for file naming so make it relevant for identification
APP_NAME="backupTest"
# mongo server and port
MONGO_HOST="127.0.0.1"
MONGO_PORT="27017"
MONGO_USERNAME=""
MONGO_PASSWORD=""
MONGO_AUTHDB="admin"
# specify where you want the mongodump and backup files to be saved until upload to S3
BACKUPS_DIR="/Users/danielgray/backups/$APP_NAME"
# the full path to the app you are backing up
APP_DIR="/Users/danielgray/websiteTest/adapt_authoring"
# Amazon S3 bucket name
S3_BUCKET="mybucket"
# Minimum disk space as a %
MINCAPACITY="75"

TIMESTAMP=$(date "+%Y-%m-%d")
DB_BACKUP_NAME="$APP_NAME-$MONGO_DATABASE-$TIMESTAMP"
APP_BACKUP_NAME="$APP_NAME-$TIMESTAMP"

function print_task
{
  printf "\n==> ${1}\n"
}

function print_header
{
  echo "-------------------------------------------------------------------------------"
  printf "\n  ${1}\n\n"
  echo "-------------------------------------------------------------------------------"
}

print_header "Backing up database ($MONGO_DATABASE)"
print_task "Backup destination ($BACKUPS_DIR)"

# Check if we have some disk space
if [ $(df -P "$BACKUPS_DIR" | awk '{ gsub("%",""); capacity = $5 }; END { print capacity }') -gt "$MINCAPACITY" ]; then
  print_task "Backup failed. Not enough disk space. ($TIMESTAMP)"
else

  # mongo admin --eval "printjson(db.fsyncLock())"
  # $MONGODUMP_PATH -h $MONGO_HOST:$MONGO_PORT -d $MONGO_DATABASE
  # consider using use OPLOG --oplog
  mongodump -d "$MONGO_DATABASE" -o "$BACKUPS_DIR" --host="$MONGO_HOST" --port="$MONGO_PORT" --authenticationDatabase="$MONGO_AUTHDB" --username="$MONGO_USERNAME" --password="$MONGO_PASSWORD"
  # mongo admin --eval "printjson(db.fsyncUnlock())"

  # might want to suppress tar errors --ignore-failed-read

  # compress database files
  tar -zcf "$BACKUPS_DIR/$DB_BACKUP_NAME.tgz" "$BACKUPS_DIR/$MONGO_DATABASE"

  # compress the application files
  # filtered files, use shell syntax, or globbing not regex.
  # TODO test restore without all node_modules removed
  # TODO add flag to ignore changed files, see http://stackoverflow.com/questions/20318852/tar-file-changed-as-we-read-it
  # Also need to add if statement arount aws cp command

  tar -zcf "$BACKUPS_DIR/$APP_BACKUP_NAME.tgz" --exclude='node_modules' --exclude='*.zip' --exclude='exports' "$APP_DIR"

  # Copy application and database to Amazon S3
  # needs check for files existence
  aws s3 cp --quiet "$BACKUPS_DIR/$DB_BACKUP_NAME.tgz" "s3://$S3_BUCKET/"

  aws s3 cp --quiet "$BACKUPS_DIR/$APP_BACKUP_NAME.tgz" "s3://$S3_BUCKET/"

  # remove local files
  if [ -f "$BACKUPS_DIR/$APP_BACKUP_NAME.tgz" ]; then
    rm "$BACKUPS_DIR/$APP_BACKUP_NAME.tgz"
    print_task "App backup removed"
  else
    print_task "App backup file not found and not removed"
  fi

  if [ -f "$BACKUPS_DIR/$DB_BACKUP_NAME.tgz" ]; then
    rm "$BACKUPS_DIR/$DB_BACKUP_NAME.tgz"
    print_task "Database backup removed"
  else
    print_task "Database backup file not found and not removed"
  fi

  print_task "Backup finished ($TIMESTAMP)"

fi