utils.py 文件源码

def get_process_id_list(self, sentry_unit, process_name,
                            expect_success=True):
        """Get a list of process ID(s) from a single sentry juju unit
        for a single process name.

        :param sentry_unit: Amulet sentry instance (juju unit)
        :param process_name: Process name
        :param expect_success: If False, expect the PID to be missing,
            raise if it is present.
        :returns: List of process IDs
        """
        cmd = 'pidof -x "{}"'.format(process_name)
        if not expect_success:
            cmd += " || exit 0 && exit 1"
        output, code = sentry_unit.run(cmd)
        if code != 0:
            msg = ('{} `{}` returned {} '
                   '{}'.format(sentry_unit.info['unit_name'],
                               cmd, code, output))
            amulet.raise_status(amulet.FAIL, msg=msg)
        return str(output).split()