一个吊舱中的Springboot应用程序无法通过Openshift连接到另一个吊舱中的mongodb

Question

exception in initAndListen: IllegalOperation: Attempted to create a lock file on a read-only directory: /data/db, terminating

在遵循adm策略后，mongo吊舱成功启动并运行，

oc adm policy add-scc-to-group anyuid system:authenticated

现在我正试图部署一个连接到mongodb的springboot应用程序，但是由于以下错误，pod重新启动了多次，

 INFO Exception in monitor thread while connecting to server mongo-node-2.database:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
Caused by: java.net.SocketTimeoutException: connect timed out
                        INFO Exception in monitor thread while connecting to server mongo-node-3.database:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
Caused by: java.net.SocketTimeoutException: connect timed out
                        INFO Exception in monitor thread while connecting to server mongo-node-1.database:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
Caused by: java.net.SocketTimeoutException: connect timed out
                        WARN Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Failed to start bean 'org.springframework.kafka.config.internalKafkaListenerEndpointRegistry'; nested exception is org.apache.kafka.common.errors.TimeoutException: Timeout expired while fetching topic metadata
org.springframework.context.ApplicationContextException: Failed to start bean 'org.springframework.kafka.config.internalKafkaListenerEndpointRegistry'; nested exceptio  is org.apache.kafka.common.errors.TimeoutException: Timeout expired while fetching topic metadata
Caused by: org.apache.kafka.common.errors.TimeoutException: Timeout expired while fetching topic metadata

当通过openshift部署时，springboot应用程序pod可以连接到mongodb pod，所以我使用k8s创建了一个虚拟pod，并尝试连接mongodb pod，

mongo mongo-node-1.database.svc (successful)

我怀疑这个问题可能是因为OpenShift阻止springboot pod与mongodb pod连接的策略。

请给我任何建议。

Answer 1

该问题是由于OpenShift中一个项目（命名空间）中的pods和服务无法访问另一个项目（命名空间）中的pods和服务造成的。

中的所有吊舱和服务，现在可以使用以下命令访问任何吊舱和服务，反之亦然。

$ oc adm pod-network join-projects --to=<project1> <project2> <project3>

参考链接-https://docs.openshift.com/container-platform/3.11/admin_guide/managing_networking.html