docker搭建mongo单机单节点副本集模式

1.先说问题

现有如下问题：

1.在springboot环境下，连接mongo，报如下错误：

Caused by: com.mongodb.MongoCommandException: Command failed with error 20 (IllegalOperation): 
'Transaction numbers are only allowed on a replica set member or mongos' on server xxx:27017. The full response is {"ok": 0.0, "errmsg": "Transaction numbers are 
only allowed on a replica set member or mongos", "code": 20, "codeName": "IllegalOperation"}

2.在springboot环境下，连接mongo，报如下错误：

MongoSecurityException: Exception authenticating MongoCredential
{mechanism=SCRAM-SHA-256,......

后续解答这两个问题

2.编排docker-compose.yml

version: '3'
 
services:
  mdb:
    image: mongo:4.4.7
    restart: always
    container_name: mdb
    command: mongod --replSet repl --keyFile