ansible做小范围的集群管理还是很棒的，我挺喜欢他的modules模块的，够直接 ！！！
我这里就说些常见的ansible的modules吧。
一看大家就懂了，就是服务状态的管理模块
ansible webservers -m service -a “name=httpd state=started”
ping模块
ansible webservers -m ping
基本命令
ansible webservers -m command -a “/sbin/reboot -t now”
关于redis的模块
[root@67 ~]# ansible web -m redis -a "command=flush flush_mode=all"
10.10.10.66 | success >> {
"changed": true,
"flushed": true
}
[root@67 ~]#
# Set local redis instance to be slave of melee.island on port 6377
– redis: command=slave master_host=melee.island master_port=6377
# Deactivate slave mode
– redis: command=slave slave_mode=master
# Flush all the redis db
– redis: command=flush flush_mode=all
# Flush only one db in a redis instance
– redis: command=flush db=1 flush_mode=db
# Configure local redis to have 10000 max clients
– redis: command=config name=maxclients value=10000
# Configure local redis to have lua time limit of 100 ms
– redis: command=config name=lua-time-limit value=100
还有mongodb的管理模块
# Create ‘burgers’ database user with name ‘bob’ and password ‘12345’.
– mongodb_user: database=burgers name=bob password=12345 state=present
# Delete ‘burgers’ database user with name ‘bob’.
– mongodb_user: database=burgers name=bob state=absent
# Define more users with various specific roles (if not defined, no roles is assigned, and the user will be added via pre mongo 2.2 style)
– mongodb_user: database=burgers name=ben password=12345 roles=’read’ state=present
– mongodb_user: database=burgers name=jim password=12345 roles=’readWrite,dbAdmin,userAdmin’ state=present
– mongodb_user: database=burgers name=joe password=12345 roles=’readWriteAnyDatabase’ state=present
# add a user to database in a replica set, the primary server is automatically discovered and written to
– mongodb_user: database=burgers name=bob replica_set=blecher password=12345 roles=’readWriteAnyDatabase’ state=present
在这里有大量的模块，大家可以好好看看，当然ansible也是可以自己开发模块的。 他的写法和saltstack有些相像。。。。
