Class: MySQLDBTool::Backup

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

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Backup 



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# File 'lib/mysql_db_tool/backup.rb', line 9

def initialize(options = {})
  @options = options
  config = MySQLDBTool::Config::ConfigLoader.load(options[:env])
  @data_tables = config[:data_tables]
  @ignore_tables = config[:ignore_tables]
  @db_info = config[:db_info]

  @db_info[:database] = @options[:database] if @options[:database]
end

Instance Method Details

#gzip_command(command, use_gzip, file, gzip_suffix = '.gz') ⇒ Object 



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# File 'lib/mysql_db_tool/backup.rb', line 67

def gzip_command(command, use_gzip, file, gzip_suffix = '.gz')
  "#{command} #{use_gzip ? '| gzip ' : ''} > #{file}#{use_gzip ? gzip_suffix : ''}"
end

#perform ⇒ Object 



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

def perform

  verify_tools_exist

  id=@options[:id] || "0"
  use_gzip=@options[:gzip]
  limit_days=@options[:limit_days] || 3
  gzip_suffix = @options[:gzip_suffix] || '.gz'

  Array(@db_info[:database]).flat_map.each_with_index do |database, index |

    default_options="--column-statistics=0 #{mysql_default_options(@db_info, database)}"
    backup_dir=backup_dir_name(id, "#{index}_#{database}")

    commands = []
    if File.exist? backup_dir
      puts "[skip - directory exists] #{backup_dir}"
      return commands
    end
    commands.push "mkdir -p #{backup_dir}"

    backup_file="#{backup_dir}/#{DateTime.now.strftime("%Y-%m-%d")}_#{id}"
    where_date=(Date.today - limit_days).strftime("%Y-%m-%d 00:00:00")
    options=ENV['DUMP_OPTIONS'] || "--single-transaction --skip-lock-tables --no-tablespaces"

    puts "backupFile=#{backup_file}"

    ignore_tables_option = @ignore_tables.map { |e| "--ignore-table=#{e.include?('.') ? e : "#{database}.#{e}"}" }.join(' ')

    commands.push gzip_command("mysqldump --no-data #{ignore_tables_option} #{options} #{default_options}", use_gzip, "#{backup_file}-schema.sql", gzip_suffix)

    backup_tables = []

    @data_tables.each {|table|
      where = table[:where].empty? ? "" : "--where=\"#{table[:where]} >= '#{where_date}'\""
      if where.empty?
        backup_tables.push(table[:name])
        next
      else
        commands.push(gzip_command("mysqldump --no-create-info #{options} #{where} #{default_options} #{table[:name]}", use_gzip, "#{backup_file}-#{table[:name]}.sql", gzip_suffix))
      end
    }

    commands.push(gzip_command("mysqldump --no-create-info #{ignore_tables_option} #{options} #{default_options} #{backup_tables.join(' ')}", use_gzip, "#{backup_file}-all-other-tables.sql", gzip_suffix))
    commands
  end
end