def read_instances(self):
logger.debug('<STR_LIT>', self.instances_path)<EOL>if os.path.exists(self.instances_path):<EOL><INDENT>with open(self.instances_path, '<STR_LIT:r>') as f:<EOL><INDENT>list_ = yaml.load(f.read())<EOL>self.cluster = Cluster.from_list(list_, settings=self.settings)<EOL><DEDENT><DEDENT>
Read `.dsb/instances.yaml`
Populates `self.cluster`