Implement mysql backups using xtrabackup tool.

slapos/recipe/erp5/src/slapos/recipe/erp5/__init__.py

@@ -810,5 +810,34 @@ SSLRandomSeed connect builtin
         configuration_file=mysql_conf_path,
        )]))
     self.path_list.extend([mysql_conf_path])
+
+    # backup configuration
+    backup_directory = self.createBackupDirectory('mysql')
+    full_backup = os.path.join(backup_directory, 'full')
+    incremental_backup = os.path.join(backup_directory, 'incremental')
+    self._createDirectory(full_backup)
+    self._createDirectory(incremental_backup)
+    innobackupex_argument_list = [self.options['innobackupex_binary'], '--defaults-file=%s' % mysql_conf_path, '--socket=%s' %mysql_conf['socket'].strip(), '--user=root']
+    environment = dict(PATH=':'.join([self.bin_directory] + os.environ['PATH'].split(':')))
+    innobackupex_incremental = zc.buildout.easy_install.scripts([('innobackupex_incremental',
+      __name__ + '.execute', 'executee')], self.ws,
+      sys.executable, self.bin_directory, arguments=[
+        innobackupex_argument_list + ['--incremental'],
+        environment])[0]
+    self.path_list.append(innobackupex_incremental)
+    innobackupex_full = zc.buildout.easy_install.scripts([('innobackupex_full',
+      __name__ + '.execute', 'executee')], self.ws,
+      sys.executable, self.bin_directory, arguments=[
+        innobackupex_argument_list,
+        environment])[0]
+    self.path_list.append(innobackupex_full)
+    backup_controller = zc.buildout.easy_install.scripts([('innobackupex_controller',
+      __name__ + '.innobackupex', 'controller')], self.ws,
+      sys.executable, self.bin_directory, arguments=[innobackupex_incremental,
+        innobackupex_full, full_backup, incremental_backup])[0]
+    self.path_list.append(backup_controller)
+    mysql_backup_cron = os.path.join(self.cron_d, 'mysql_backup')
+    open(mysql_backup_cron, 'w').write('0 0 * * * ' + backup_controller)
+    self.path_list.append(mysql_backup_cron)
     # The return could be more explicit database, user ...
     return mysql_conf

slapos/recipe/erp5/src/slapos/recipe/erp5/innobackupex.py

+import os
+import glob
+def controller(args):
+  """Creates full backup if not yet found, otherwise uses the newes full one
+  to perform incremental"""
+  innobackupex_incremental, innobackupex_full, full_backup, incremental_backup \
+      = args
+  if len(os.listdir(full_backup)) == 0:
+    print 'Doing full backup in %r' % full_backup
+    os.execv(innobackupex_full, [innobackupex_full, full_backup])
+  backup_list = filter(os.path.isdir, glob.glob(full_backup + "/*"))
+  backup_list.sort(key=lambda x: os.path.getmtime(x), reverse=True)
+  base = backup_list[0]
+  print 'Doing incremental backup in %r using %r as a base' % (
+      incremental_backup, base)
+  os.execv(innobackupex_incremental, [innobackupex_incremental,
+    '--incremental-basedir=%s'%base, incremental_backup])