我想通过笔记本电脑上的 Java 应用程序在服务器上使用 MongoDB。 这是我的 ufw 设置
aran@Aran:~$ sudo ufw status
Status: active
To Action From
-- ------ ----
OpenSSH ALLOW Anywhere
22 ALLOW Anywhere
80 ALLOW Anywhere
443 ALLOW Anywhere
21/tcp ALLOW Anywhere
27017 ALLOW 1.234.56.78
27017 ALLOW Anywhere
OpenSSH (v6) ALLOW Anywhere (v6)
22 (v6) ALLOW Anywhere (v6)
80 (v6) ALLOW Anywhere (v6)
443 (v6) ALLOW Anywhere (v6)
21/tcp (v6) ALLOW Anywhere (v6)
27017 (v6) ALLOW Anywhere (v6)
一开始我只有这个规则:
27017 ALLOW 1.234.56.78
其中 1.234.56.78 是我的 IP 地址,但它不起作用,所以我添加了此规则:
27017 ALLOW Anywhere
但这也没有帮助。
这是我的java代码:
java.util.logging.Logger.getLogger("org.mongodb.driver").setLevel(Level.OFF);
MongoClientURI connectionString = new MongoClientURI("mongodb://123.45.67.89:27017");
MongoClient mongoClient = new MongoClient(connectionString);
MongoDatabase CaptionBotUsers = mongoClient.getDatabase("CaptionBotUsers");
//CaptionBotUsers.createCollection("users", new CreateCollectionOptions().autoIndex(true));
MongoCollection<Document> users = CaptionBotUsers.getCollection("users");
long found = users.count(Document.parse("{_id : " + Long.toString(user.getId()) + "}"));
但我得到:
com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting for a server that matches ReadPreferenceServerSelector{readPreference=primary}. Client view of cluster state is {type=UNKNOWN, servers=[{address=123.45.67.89:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused: connect}}]
代码的最后一行(找到很久了...)
那么我该如何解决这个问题呢?
最佳答案
来自 MongoDB documentation ,它指出在某些安装中默认情况下仅监听本地连接 (127.0.0.1)。
要远程连接,您需要在 /etc/mongod.conf 中配置公共(public)可访问接口(interface):
...
net:
port: 27017
bindIp: <your-ip>, 127.0.0.1
...
关于java - 如何使用java远程连接到我的服务器中的MongoDB?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46041607/