[direct: mongos] test> use config
switched to db config

[direct: mongos] config> db.shards.find()
[
  {
    _id: 'shardA',
    host: 'shardA/localhost:1112',
    state: 1,
    topologyTime: Timestamp({ t: 1760690959, i: 12 }),
    replSetConfigVersion: Long("-1")
  },
  {
    _id: 'shardB',
    host: 'shardB/localhost:1113',
    state: 1,
    topologyTime: Timestamp({ t: 1760690959, i: 30 }),
    replSetConfigVersion: Long("-1")
  },
  {
    _id: 'shardC',
    host: 'shardC/localhost:1114',
    state: 1,
    topologyTime: Timestamp({ t: 1760690959, i: 53 }),
    replSetConfigVersion: Long("-1")
  }
]


[direct: mongos] config> db.adminCommand({getShardMap:1})
{
  map: {
    shardA: 'shardA/localhost:1112',
    shardB: 'shardB/localhost:1113',
    shardC: 'shardC/localhost:1114',
    config: 'configRepl/localhost:1115'
  },
  hosts: {
    'localhost:1113': 'shardB',
    'localhost:1112': 'shardA',
    'localhost:1114': 'shardC',
    'localhost:1115': 'config'
  },
  connStrings: {
    'shardA/localhost:1112': 'shardA',
    'shardB/localhost:1113': 'shardB',
    'shardC/localhost:1114': 'shardC',
    'configRepl/localhost:1115': 'config'
  },
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1760690998, i: 1 }),
    signature: {
      hash: Binary(Buffer.from("0000000000000000000000000000000000000000", "hex"), 0),
      keyId: Long("0")
    }
  },
  operationTime: Timestamp({ t: 1760690998, i: 1 })
}

[direct: mongos] config> db.adminCommand({removeShard:'shardC'})
{
  msg: 'draining started successfully',
  state: 'started',
  shard: 'shardC',
  note: 'you need to drop or movePrimary these databases',
  dbsToMove: [],
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1760691029, i: 2 }),
    signature: {
      hash: Binary(Buffer.from("0000000000000000000000000000000000000000", "hex"), 0),
      keyId: Long("0")
    }
  },
  operationTime: Timestamp({ t: 1760691029, i: 2 })
}

[direct: mongos] config> db.adminCommand({removeShard:'shardC'})
{
  msg: 'removeshard completed successfully',
  state: 'completed',
  shard: 'shardC',
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1760691030, i: 17 }),
    signature: {
      hash: Binary(Buffer.from("0000000000000000000000000000000000000000", "hex"), 0),
      keyId: Long("0")
    }
  },
  operationTime: Timestamp({ t: 1760691030, i: 17 })
}


[direct: mongos] config> db.adminCommand({getShardMap:1})
{
  map: {
    shardA: 'shardA/localhost:1112',
    shardB: 'shardB/localhost:1113',
    config: 'configRepl/localhost:1115'
  },
  hosts: {
    'localhost:1114': 'shardC',
    'localhost:1112': 'shardA',
    'localhost:1113': 'shardB',
    'localhost:1115': 'config'
  },
  connStrings: {
    'shardA/localhost:1112': 'shardA',
    'shardB/localhost:1113': 'shardB',
    'shardC/localhost:1114': 'shardC',
    'configRepl/localhost:1115': 'config'
  },
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1760691032, i: 1 }),
    signature: {
      hash: Binary(Buffer.from("0000000000000000000000000000000000000000", "hex"), 0),
      keyId: Long("0")
    }
  },
  operationTime: Timestamp({ t: 1760691032, i: 1 })
}



[direct: mongos] config> db.shards.find()
[
  {
    _id: 'shardA',
    host: 'shardA/localhost:1112',
    state: 1,
    topologyTime: Timestamp({ t: 1760691030, i: 8 }),
    replSetConfigVersion: Long("-1")
  },
  {
    _id: 'shardB',
    host: 'shardB/localhost:1113',
    state: 1,
    topologyTime: Timestamp({ t: 1760690959, i: 30 }),
    replSetConfigVersion: Long("-1")
  }
]