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[direct: mongos] vvd> sh.status()
shardingVersion
{ _id: 1, clusterId: ObjectId('67177b0f7478e63cb9a618a5') }
---
shards
[
  {
    _id: 'shard1',
    host: 'shard1/shard1:27018',
    state: 1,
    topologyTime: Timestamp({ t: 1729592126, i: 2 })
  },
  {
    _id: 'shard2',
    host: 'shard2/shard2:27018',
    state: 1,
    topologyTime: Timestamp({ t: 1729593951, i: 2 })
  },
  {
    _id: 'shard3',
    host: 'shard3/shard3:27018',
    state: 1,
    topologyTime: Timestamp({ t: 1729593958, i: 2 })
  }
]
---
active mongoses
[ { '7.0.12': 1 } ]
---
autosplit
{ 'Currently enabled': 'yes' }
---
balancer
{
  'Currently enabled': 'yes',
  'Failed balancer rounds in last 5 attempts': 0,
  'Currently running': 'no',
  'Migration Results for the last 24 hours': 'No recent migrations'
}
---
databases
[
  {
	{
    database: {
      _id: 'vvd',
      primary: 'shard3',
      partitioned: false,
      version: {
        uuid: UUID('5ffbe210-fe2a-4b96-8b98-f568eab7fbec'),
        timestamp: Timestamp({ t: 1729594145, i: 1 }),
        lastMod: 1
      }
    },
    collections: {
      'vvd.fs.chunks': {
        shardKey: { files_id: 'hashed', n: 1 },
        unique: false,
        balancing: true,
        chunkMetadata: [
          { shard: 'shard1', nChunks: 2 },
          { shard: 'shard2', nChunks: 2 },
          { shard: 'shard3', nChunks: 2 }
        ],
        chunks: [
          { min: { files_id: MinKey(), n: MinKey() }, max: { files_id: Long('-6148914691236517204'), n: MinKey() }, 'on shard': 'shard3', 'last modified': Timestamp({ t: 1, i: 0 }) },
          { min: { files_id: Long('-6148914691236517204'), n: MinKey() }, max: { files_id: Long('-3074457345618258602'), n: MinKey() }, 'on shard': 'shard3', 'last modified': Timestamp({ t: 1, i: 1 }) },
          { min: { files_id: Long('-3074457345618258602'), n: MinKey() }, max: { files_id: Long('0'), n: MinKey() }, 'on shard': 'shard1', 'last modified': Timestamp({ t: 1, i: 2 }) },
          { min: { files_id: Long('0'), n: MinKey() }, max: { files_id: Long('3074457345618258602'), n: MinKey() }, 'on shard': 'shard1', 'last modified': Timestamp({ t: 1, i: 3 }) },
          { min: { files_id: Long('3074457345618258602'), n: MinKey() }, max: { files_id: Long('6148914691236517204'), n: MinKey() }, 'on shard': 'shard2', 'last modified': Timestamp({ t: 1, i: 4 }) },
          { min: { files_id: Long('6148914691236517204'), n: MinKey() }, max: { files_id: MaxKey(), n: MaxKey() }, 'on shard': 'shard2', 'last modified': Timestamp({ t: 1, i: 5 }) }
        ],
        tags: []
      }
    }
  }
]

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use admin
db.createUser(
    {
        user:"root",
        pwd:"passwd",
        roles:["root"]
    }
)

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db.createUser({
    user:"manager",
    pwd:"passwd",
    customData:{
        name:'vvd',
        email:'zywvvd@mail.ustc.edu.cn',
        age:33,
    },
    roles:[
        {role:"readWrite",db:"test_db"},
        'read'// 对其他数据库有只读权限，对 test_db 是读写权限
    ]
})

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db.createUser({
    user:"filereader",
    pwd:"passwd",
    customData:{
        name:'reader',
        email:'reader@test.cn',
        age:18,
    },
    roles:[
        {role:"read",db:"test_db"}
    ]
})