如何为 mongodb 副本集配置 grails 3

Question

我正在将 grails 3 应用程序部署到实时服务器。一个 mongodb 实例已设置为复制模式，并在 live box 中成功测试。我测试过：

mongo -u uname -authenticationDatabase dbname ip-1.ec2.internal:27017/dbname -p password

我使用了replicaSet 和connectionString 指定的here 和here。但在这两种情况下，它的行为都好像没有提供主机配置，因此默认为 localhost。而且由于没有设置它失败。这是 application.groovy：

mongodb {
            replicaSet = [ "ip-1.ec2.internal", "ip-12.ec2.internal", "ip-3.ec2.internal"]
            host = "ip-1.ec2.internal" //This works for any of the hosts
            port = 27017
            username = "username"
            password = "password"
            databaseName = "dbname"
        }

我使用的是最新版本：

grailsVersion=3.2.8 //It was the same for 3.2.5
gormVersion=6.0.9.RELEASE
gradleWrapperVersion=3.4.1 //It was the same for 3.0

以下是插件列表及其版本：

compile 'org.grails.plugins:mongodb:6.1.0'
compile 'org.grails:grails-datastore-rest-client:6.0.9.RELEASE'

这是我遇到的错误：

01:22:26.410 - [localhost-startStop-1] INFO  org.mongodb.driver.cluster - No server chosen by 
ReadPreferenceServerSelector{readPreference=primary} from cluster description ClusterDescription{type=UNKNOWN, connectionMode=SINGLE, 
all=[ServerDescription{address=127.0.0.1:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSecurityException: 
Exception authenticating MongoCredential{mechanism=null, userName='username', source='dbname', password=<hidden>, 
mechanismProperties={}}}, caused by {com.mongodb.MongoCommandException: Command failed with error 18: 
'Authentication failed.' on server 127.0.0.1:27017. The full response 
is { "ok" : 0.0, "code" : 18, "errmsg" : "Authentication failed." }}}]}. Waiting for 30000 ms before timing out

我现在已经用完了选项，有人可以在这里指点帮助我吗？谢谢。

Answer 1

James Kleeh 建议的 connection strings 解决了这个问题。这就是我参考example 使用它的方式：

mongodb {
    url = "mongodb://ip-1.ec2.internal,ip-2.ec2.internal,ip-3.ec2.internal/?replicaSet=hostname-of-mongod-instance"
    port = 27017
    ...
}