Hands-On Microservices with Kotlin

Creating our Docker

Now that our microservice is running, we need to create a Docker. To simplify the process, we will just use Dockerfile. To create this file on the top of the Project window, right-click chapter08 and then select New | File and type Dockerfile in the drop-down menu. In the next window, click OK and the file will be created.

Now, we can add this to our Dockerfile:

FROM openjdk:8-jdk-alpineADD target/*.jar app.jarENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar", "app.jar"]

In this case, we tell the JVM to use dev/urandom instead of dev/random to generate random numbers required by our ID generation and this will make the operation much faster. You may think that urandom is less secure than random, but read ...