Continuous Delivery with Docker and Jenkins

Running services

Let's start with a simple example, and run a Tomcat server directly from Docker Hub:

$ docker run -d tomcat

Tomcat is a web application server whose user interface can be accessed by the port 8080. Therefore, if we installed Tomcat on our machine, we could browse it at http://localhost:8080.

In our case, however, Tomcat is running inside the Docker container. We started it the same way we did with the first Hello World example. We can see it's running:

$ docker psCONTAINER ID IMAGE  COMMAND           STATUS            PORTS    NAMESd51ad8634fac tomcat "catalina.sh run" Up About a minute 8080/tcp jovial_kare

Since it's run as a daemon (with the -d option), we don't see the logs in the console right away. We can, however, access it by executing the ...