def check_commands_on_units(self, commands, sentry_units):
        """Check that all commands in a list exit zero on all
        sentry units in a list.

        :param commands:  list of bash commands
        :param sentry_units:  list of sentry unit pointers
        :returns: None if successful; Failure message otherwise
        """
        self.log.debug('Checking exit codes for {} commands on {} '
                       'sentry units...'.format(len(commands),
                                                len(sentry_units)))
        for sentry_unit in sentry_units:
            for cmd in commands:
                output, code = sentry_unit.run(cmd)
                if code == 0:
                    self.log.debug('{} `{}` returned {} '
                                   '(OK)'.format(sentry_unit.info['unit_name'],
                                                 cmd, code))
                else:
                    return ('{} `{}` returned {} '
                            '{}'.format(sentry_unit.info['unit_name'],
                                        cmd, code, output))
        return None
def check_commands_on_units ( self , commands , sentry_units ) : self . log . debug ( 'Checking exit codes for {} commands on {} ' 'sentry units...' . format ( len ( commands ) , len ( sentry_units ) ) ) for sentry_unit in sentry_units : for cmd in commands : output , code = sentry_unit . run ( cmd ) if code == 0 : self . log . debug ( '{} `{}` returned {} ' '(OK)' . format ( sentry_unit . info [ 'unit_name' ] , cmd , code ) ) else : return ( '{} `{}` returned {} ' '{}' . format ( sentry_unit . info [ 'unit_name' ] , cmd , code , output ) ) return None
Check that all commands in a list exit zero on all
        sentry units in a list.

        :param commands:  list of bash commands
        :param sentry_units:  list of sentry unit pointers
        :returns: None if successful; Failure message otherwise