'Integration test for different instances of same application

I have a java application(no Spring). Replica of this application working at another server, with another instance of databse. Database table 'settings' have property master Y or N(for replica). After any action on master, i sending message to kafka an kafka sending action to replica with db update action. Any ideas for testing full cycle of this process?

I used testcontainers for getting kafka and databases. But i havent idea how to launch in testcontainer instance of my application with db.

javadockerjunittestcontainers


Solution 1:[1]

What you need here is to containerize your java application. On each master action (merge), configure your CI/CD to create a docker image of your application. Then you can deploy your application using test containers.

GenericContainer container = new GenericContainer("myAppImage:release1")
        .withImagePullPolicy(PullPolicy.defaultPolicy());

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Solution Source
Solution 1 Juan Rada

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