[root@master ~]# uname -a
Linux master 2.6.32-504.el6.x86_64 #1 SMP Wed Oct 15 04:27:16 UTC 2014 x86_64 x86_64 x86_64 GNU/Linu
[root@master ~]# rpm -qa salt-master
salt-master-2015.5.10-2.el6.noarch
[root@master ~]# salt '*' service.stop httpd
minion-node1-saltstack.com:
Module 'service' is not available.
linux-slave-node1.com:
Module 'service' is not available.
ERROR: Minions returned with non-zero exit code
saltstack service模块不可用这个怎么回事,命令是在官方完整直接拷贝下来的不可能会有问题啊,这个怎么解决?