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require 'yaml'
module Backup
class Database
attr_reader :config, :db_dir
def initialize
@config = YAML.load_file(File.join(Rails.root,'config','database.yml'))[Rails.env]
@db_dir = File.join(GitlabCi.config.backup.path, 'db')
FileUtils.mkdir_p(@db_dir) unless Dir.exists?(@db_dir)
end
def dump
FileUtils.rm_f(db_file_name)
compress_rd, compress_wr = IO.pipe
compress_pid = spawn(*%W(gzip -c), in: compress_rd, out: [db_file_name, 'w', 0600])
compress_rd.close
dump_pid = case config["adapter"]
when /^mysql/ then
$progress.print "Dumping MySQL database #{config['database']} ... "
spawn('mysqldump', *mysql_args, config['database'], out: compress_wr)
when "postgresql" then
$progress.print "Dumping PostgreSQL database #{config['database']} ... "
pg_env
spawn('pg_dump', config['database'], out: compress_wr)
end
compress_wr.close
success = [compress_pid, dump_pid].all? { |pid| Process.waitpid(pid); $?.success? }
report_success(success)
abort 'Backup failed' unless success
end
def restore
decompress_rd, decompress_wr = IO.pipe
decompress_pid = spawn(*%W(gzip -cd), out: decompress_wr, in: db_file_name)
decompress_wr.close
restore_pid = case config["adapter"]
when /^mysql/ then
$progress.print "Restoring MySQL database #{config['database']} ... "
spawn('mysql', *mysql_args, config['database'], in: decompress_rd)
when "postgresql" then
$progress.print "Restoring PostgreSQL database #{config['database']} ... "
# Drop all tables because PostgreSQL DB dumps do not contain DROP TABLE
# statements like MySQL.
drop_all_tables
drop_all_postgres_sequences
pg_env
spawn('psql', config['database'], in: decompress_rd)
end
decompress_rd.close
success = [decompress_pid, restore_pid].all? { |pid| Process.waitpid(pid); $?.success? }
report_success(success)
abort 'Restore failed' unless success
end
protected
def db_file_name
File.join(db_dir, 'database.sql.gz')
end
def mysql_args
args = {
'host' => '--host',
'port' => '--port',
'socket' => '--socket',
'username' => '--user',
'encoding' => '--default-character-set',
'password' => '--password'
}
args.map { |opt, arg| "#{arg}=#{config[opt]}" if config[opt] }.compact
end
def pg_env
ENV['PGUSER'] = config["username"] if config["username"]
ENV['PGHOST'] = config["host"] if config["host"]
ENV['PGPORT'] = config["port"].to_s if config["port"]
ENV['PGPASSWORD'] = config["password"].to_s if config["password"]
end
def report_success(success)
if success
$progress.puts '[DONE]'.green
else
$progress.puts '[FAILED]'.red
end
end
def drop_all_tables
connection = ActiveRecord::Base.connection
connection.tables.each do |table|
connection.drop_table(table)
end
end
def drop_all_postgres_sequences
connection = ActiveRecord::Base.connection
connection.execute("SELECT c.relname FROM pg_class c WHERE c.relkind = 'S';").each do |sequence|
connection.execute("DROP SEQUENCE #{sequence['relname']}")
end
end
end
end
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