can't execute mongo command

[陈江宏]

1. kubectl apply -f https://api.kubestack.com/v1/manifest/bec3141
2. kubectl -n default exec -ti mongo-plum-reptilia-0 -c mongod
   -- mongo --host localhost --ssl
   --sslCAFile /etc/ssl/mongod/ca.pem
   --sslPEMKeyFile /etc/ssl/mongod/mongod.pem
   MongoDB shell version v3.6.4
   connecting to: mongodb://localhost:27017/
   MongoDB server version: 3.6.4

3. show dbs
   2018-10-02T02:54:38.723+0000 E QUERY [thread1] Error: listDatabases failed:{
   "ok" : 0,
   "errmsg" : "not authorized on admin to execute command { listDatabases: 1.0, $db: "admin" }",
   "code" : 13,
   "codeName" : "Unauthorized"
   } :
   _getErrorWithCode@src/mongo/shell/utils.js:25:13
   Mongo.prototype.getDBs@src/mongo/shell/mongo.js:65:1
   shellHelper.show@src/mongo/shell/utils.js:820:19
   shellHelper@src/mongo/shell/utils.js:710:15
   @(shellhelp2):1:1

[陈江宏]

use db.auth('root','get password from k8s security config map')