When mongo is built with replica set cluster.
If you log into one of the SECONDARY nodes and execute the command show dbs, you will get an error:
2022-08-16T15:20:00.606+0800 E QUERY [js] uncaught exception: Error: listDatabases failed:{
"operationTime" : Timestamp(1660634399, 2),
"ok" : 0,
"errmsg" : "not master and slaveOk=false",
"code" : 13435,
"codeName" : "NotMasterNoSlaveOk",
"$clusterTime" : {
"clusterTime" : Timestamp(1660634399, 2),
"signature" : {
"hash" : BinData(0,"NPF356c5NKl0PqHLlmiQ9vey9e4="),
"keyId" : NumberLong("7101680539345616897")
}
}
} :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
Mongo.prototype.getDBs/<@src/mongo/shell/mongo.js:147:19
Mongo.prototype.getDBs@src/mongo/shell/mongo.js:99:12
shellHelper.show@src/mongo/shell/utils.js:906:13
shellHelper@src/mongo/shell/utils.js:790:15
@(shellhelp2):1:1
This is because the SECONDARY node does not have the permission to execute the show dbs command.
In this case, there are two solutions
1. Login to the PRIMARY node
2. Use the cluster connection method
mongo –host testmongo/ip:port,ip:port,ip:port -uusername -p’passwd’ –authenticationDatabase admin
In this case, there are two solutions
1. Login to the PRIMARY node
2. Use the cluster connection method
mongo –host testmongo/ip:port,ip:port,ip:port -uusername -p’passwd’ –authenticationDatabase admin
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