Mongo认证授权

use admin
db.createUser(
  {
    user: "admin",
    pwd: "admin",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
)
2、
use test
db.createUser(
  {
    user: "test",
    pwd: "test",
    roles: [ { role: "readWrite", db: "test" }]
  }
)
3.查看权限
Use admin 
db.createUser(
  {
    user: "local",
    pwd: "local",
    roles: [ { role: "read", db: "local" }]
  }
)

收回权限
db.revokeRolesFromUser(
    "reportsUser",
    [
      { role: "readWrite", db: "accounts" }
    ]
)
授权
db.grantRolesToUser(
    "reportsUser",
    [
      { role: "read", db: "accounts" }
    ]
)

创建admin用户
admin = db.getSiblingDB("admin")
admin.createUser(
  {
    user: "admin",
    pwd: "admin",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
)
db.grantRolesToUser('admin', [{role:'clusterAdmin',db:'admin'}])

关闭数据库
use admin
db.shutdownServer()

登录到primary
db.getSiblingDB("admin").auth("admin", "admin" )
创建用户
db.getSiblingDB("admin").createUser(
  {
    "user" : "clusterAdmin",
    "pwd" : "clusterAdmin",
    roles: [ { "role" : "clusterAdmin", "db" : "admin" } ]
  }
)

db.changeUserPassword('password','newPassword');  

db.getSiblingDB("dbname").auth("db", "password" )

查看当前数据库用户
db.system.users.find();
Db.getUsers();
Db.getUser(‘admin’);
查看用户的权限
db.getUser("reportsUser")
查看角色授予的用户
db.getRole( "readWrite", { showPrivileges: true } )

db.dropUser(‘admin’)

不小心把admin用户删除了，重新admin用户无法创建，报错为：
Error: couldn't add user: not authorized on admin to execute command 。。。.
如何重新报建admin用户呢？
思路：
A: 在mongodb.conf中注释掉security认证部分
B: 重启MONGO
C：创建用户 admin
D:修改配置文件打开security认证部分且重新启动

1) vi /etc/mongod.conf
注释下面的内容
#security:
# clusterAuthMode: keyFile
# keyFile: /data/mongodb/key/repl_set.key
# authorization: enabled

systemctl restart mongod.service

use admin
db.system.users.find()
db.dropUser("admin")
db.system.users.remove({user:"admin"}) 
db.createUser({user:"userName",pwd:"password",roles:["readWrite"]})
db.grantRolesToUser("admin",[{ role: "clusterAdmin", db: "admin" }]);
db.grantRolesToUser("admin",[{ role: "userAdminAnyDatabase", db: "admin" }]);
db.grantRolesToUser("admin",[{ role: "root", db: "admin" }]);

vi /etc/mongod.conf
//打开下面的内容
security:
 clusterAuthMode: keyFile
 keyFile: /data/mongodb/key/repl_set.key
 authorization: enabled

systemctl restart mongod
启动后可以按如下进行数据库授权访问了
> use admin
> db.auth("userName","password")

如果允许slave 读操作，则在slave上执行 rs.slaveOk(); 就OK