from glusto.core import Glusto as g def cmd_run(cmd, hostname, raise_on_error=True): """Glusto's command runner wrapper. Args: cmd (str): Shell command to run on the specified hostname. hostname (str): hostname where Glusto should run specified command. raise_on_error (bool): defines whether we should raise exception in case command execution failed. Returns: str: Stripped shell command's stdout value if not None. """ ret, out, err = g.run(hostname, cmd, "root") if raise_on_error: msg = ("Failed to execute command '%s' on '%s' node. Got non-zero " "return code '%s'. Err: %s" % (cmd, hostname, ret, err)) assert int(ret) == 0, msg out = out.strip() if out else out return out