无法从远程客户端访问 Docker 容器内的 MongoDB 副本集

Question

我在 Docker 容器中设置了一个 mongoDB Replicaset (3-repicas)。我可以从主机访问副本集，但无法从远程客户端访问 mongoDB 副本集。

参考：https://www.sohamkamani.com/blog/2016/06/30/docker-mongo-replica-set/

创建 mongoDB 副本集的脚本：

$ docker run -it -v <host mount path>:/data/db -p 30000:30000 --name mongo0 --net my-mongo-cluster -d mongo --replSet my-mongo-set --port 30000
$ docker run -it -v <host mount path>:/data/db -p 30001:30001 --name mongo1 --net my-mongo-cluster -d mongo --replSet my-mongo-set --port 30001
$ docker run -it -v <host mount path>:/data/db -p 30002:30002 --name mongo2 --net my-mongo-cluster -d mongo --replSet my-mongo-set --port 30002

$docker exec -it mongo1 mongo

> rs.initiate({_id: "my-mongo-set", version: 1, members: [
  { _id: 0, host : "mongo0:30000" },
  { _id: 1, host : "mongo1:30001" },
  { _id: 2, host : "mongo2:30002" }
]});

以上命令成功。

我尝试从 docker 容器外的同一主机访问 mongo Replicaset：

$ mongo mongodb://<PUBLIC_IP>:30000,<PUBLIC_IP>:30001,<PUBLIC_IP>:30002/?replicaSet=my-mongo-set
my-mongo-set:PRIMARY> 

即使这样也有效：

$ mongo mongodb://localhost:30000,localhost:30001,localhost:30002/?replicaSet=my-mongo-set
my-mongo-set:PRIMARY> 

我的 /etc/hosts 文件：

$ cat /etc/hosts
127.0.0.1 localhost mongo0 mongo1 mongo2
<PUBLIC_IP> <domain> mongo0 mongo1 mongo2

什么不工作： 从远程客户端（shell 和 MongoDB Compass）：

$ mongo mongodb://<PUBLIC_IP>:30000,<PUBLIC_IP>:30001,<PUBLIC_IP>:30002/?replicaSet=my-mongo-set
connecting to: mongodb://<PUBLIC_IP>:30000,<PUBLIC_IP>:30001,<PUBLIC_IP>:30002/?replicaSet=my-mongo-set
2020-06-02T22:56:53.776+0530 I NETWORK  [js] Starting new replica set monitor for my-mongo-set/<PUBLIC_IP>:30000,<PUBLIC_IP>:30001,<PUBLIC_IP>:30002
2020-06-02T22:56:53.796+0530 I NETWORK  [ReplicaSetMonitor-TaskExecutor] Successfully connected to <PUBLIC_IP>:30000 (1 connections now open to <PUBLIC_IP>:30000 with a 5 second timeout)
2020-06-02T22:56:53.796+0530 I NETWORK  [js] Successfully connected to <PUBLIC_IP>:30002 (1 connections now open to <PUBLIC_IP>:30002 with a 5 second timeout)
2020-06-02T22:56:53.805+0530 I NETWORK  [ReplicaSetMonitor-TaskExecutor] changing hosts to my-mongo-set/mongo0:30000,mongo1:30001,mongo2:30002 from my-mongo-set/<PUBLIC_IP>:30000,<PUBLIC_IP>:30001,<PUBLIC_IP>:30002
2020-06-02T22:56:54.315+0530 W NETWORK  [js] Unable to reach primary for set my-mongo-set
2020-06-02T22:56:54.315+0530 I NETWORK  [js] Cannot reach any nodes for set my-mongo-set. Please check network connectivity and the status of the set. This has happened for 1 checks in a row.

2020-06-02T22:56:54.821+0530 W NETWORK  [js] Unable to reach primary for set my-mongo-set
2020-06-02T22:56:54.821+0530 I NETWORK  [js] Cannot reach any nodes for set my-mongo-set. Please check network connectivity and the status of the set. This has happened for 2 checks in a row.

如何解决这个问题？

Answer 1

这是因为从 3.6 版开始，mongod 只侦听 localhost -address，除非您另有说明。检查here! 或谷歌“mongod bindIp”。