Class: Backup::MySQLBackup

Inherits:
Object
  • Object
show all
Defined in:
lib/backup/mysql_backup.rb

Overview

MySQLBackup creates a dump file of a MySQL database with mysqldump and returns the dump file.

Instance Method Summary collapse

Constructor Details

#initialize(database, user, password) ⇒ MySQLBackup

database is the database to be backed up with the user that has the credentials to access the database with the provided password



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# File 'lib/backup/mysql_backup.rb', line 11

def initialize(database, user, password)
  @database = database
  @user = user
  @password = password
end

Instance Method Details

#backup(backup_folder = "./") ⇒ Object

Creates a MySQL dump file and returns the file



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# File 'lib/backup/mysql_backup.rb', line 36

def backup(backup_folder="./")
  Dir.mkdir backup_folder unless File.exists? backup_folder

  timestamp = Time.now.strftime('%Y%m%d-%H%M%S')
  backup_file = backup_folder + @database + '_' + timestamp + '.sql'
  mysqldump = "mysqldump -u#{@user} -p#{@password} #{@database}"

  backup_command = "#{mysqldump} > #{backup_file}"
  stdout_str, stderr_str, status = Open3.capture3(backup_command)
  unless status.exitstatus == 0
    File.delete backup_file if File.exists? backup_file
    STDERR.puts "There was a problem running mysqldump"
    STDERR.puts "--> #{backup_command}"
    STDERR.puts stderr_str
    exit(1)
  end

  backup_file

end

#compress(backup_file) ⇒ Object

Compresses the MySQL dump file. If an error occurs when compressing the file an error message is printed and the application terminates



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# File 'lib/backup/mysql_backup.rb', line 19

def compress(backup_file)
  tar_file = backup_file + '.tar.gz'
  tar_command = "tar cfz #{tar_file} #{backup_file}"
  stdout_str, stderr_str, status = Open3.capture3(tar_command)
  unless status.exitstatus == 0
    File.delete tar_file if File.exists? tar_file
    STDERR.puts "There was a problem compressing the backup file"
    STDERR.puts "-->#{tar_command}"
    STDERR.puts stderr_str
    exit(2)
  end

  status.exitstatus

end