+ try:
+ # instantiate a real config writer, as we now know we have the
+ # configuration data
+ cfg = config.ConfigWriter(accept_foreign=True)
+
+ cluster_info = cfg.GetClusterInfo()
+ cluster_info.master_node = new_master
+ # this will also regenerate the ssconf files, since we updated the
+ # cluster info
+ cfg.Update(cluster_info, logging.error)
+ except errors.ConfigurationError, err:
+ logging.error("Error while trying to set the new master: %s",
+ str(err))
+ return 1
+
+ # if cfg.Update worked, then it means the old master daemon won't be
+ # able now to write its own config file (we rely on locking in both
+ # backend.UploadFile() and ConfigWriter._Write(); hence the next
+ # step is to kill the old master
+
+ logging.info("Stopping the master daemon on node %s", old_master)
+
+ runner = rpc.BootstrapRunner()
+ master_params = cfg.GetMasterNetworkParameters()
+ master_params.name = old_master
+ ems = cfg.GetUseExternalMipScript()
+ result = runner.call_node_deactivate_master_ip(master_params.name,
+ master_params, ems)
+
+ msg = result.fail_msg
+ if msg:
+ logging.warning("Could not disable the master IP: %s", msg)
+
+ result = runner.call_node_stop_master(old_master)