SpringBoot-mongodb集群环境配置

spring:
  data:
    mongodb:
      host: 192.168.1.1:27017
      username: test_user
      password: pass@123
      database: tdb

这是spring-mongodb的配置，当mongodb使用了集群之后我尝试着直接修改

host: 192.168.1.1:27017,192.168.1.2:27017,192.168.1.3:27017

启动是没问题，使用是直接报错了UnknowHost，显然这样是不行的

查看了spring autorconfig的源码

org.springframework.boot.autoconfigure.mongo.MongoProperties

 

 

    private MongoClient createEmbeddedMongoClient(MongoClientOptions options, int port) {
        if (options == null) {
            options = MongoClientOptions.builder().build();
        }
        String host = (this.host != null ? this.host : "localhost");
        return new MongoClient(Collections.singletonList(new ServerAddress(host, port)),
                Collections.<MongoCredential>emptyList(), options);
    }
 
    private MongoClient createNetworkMongoClient(MongoClientOptions options) {
        if (hasCustomAddress() || hasCustomCredentials()) {
            if (this.uri != null) {
                throw new IllegalStateException("Invalid mongo configuration, "
                        + "either uri or host/port/credentials must be specified");
            }
            if (options == null) {
                options = MongoClientOptions.builder().build();
            }
            List<MongoCredential> credentials = new ArrayList<MongoCredential>();
            if (hasCustomCredentials()) {
                String database = (this.authenticationDatabase != null
                        ? this.authenticationDatabase : getMongoClientDatabase());
                credentials.add(MongoCredential.createCredential(this.username, database,
                        this.password));
            }
            String host = (this.host != null ? this.host : "localhost");
            int port = (this.port != null ? this.port : DEFAULT_PORT);
            return new MongoClient(
                    Collections.singletonList(new ServerAddress(host, port)), credentials,
                    options);
        }
        // The options and credentials are in the URI
        return new MongoClient(new MongoClientURI(determineUri(), builder(options)));
    }

显然这个配置提供了两种配置方式createEmbeddedMongoClient和createNetworkMongoClient

createEmbeddedMongoClient中创建MongoClient的时候使用的是Collections.singletonList这不可能是集群环境的配置所以看了一下createNetworkMongoClient的代码hasCustomAddress()和hasCustomCredentials()是是否有判断username、password、host、port配置，如果有这些配置并且uri不为空就会直接报错，也就是uri配置不能与其共存，host的配置方式又不能配置集群环境那么只能使用uri来实现集群配置了。

 

 根据配置类上的文档注释尝试着修改配置为 https://www.dianjilingqu.com/

spring:
  data:
    mongodb:
      uri: mongodb://test_user:pass%40123@192.168.1.1:27017,192.168.1.2:27017,192.168.1.3:27017/tdb

注意：username和password中含有“:”或“@”需要进行URLEncoder编码