To open the manager application, open the URL Enter tomcat for the username, and s3cret for the password: bin/bash -c "mv /usr/local/tomcat/webapps /usr/local/tomcat/webapps2 mv /usr/local/tomcat/webapps.dist /usr/local/tomcat/webapps cp /tmp/context.xml /usr/local/tomcat/webapps/manager/META-INF/context.xml catalina.sh run" v /tmp/tomcat-users.xml:/usr/local/tomcat/conf/tomcat-users.xml \ The command below maps the two custom XML files we created above (saved to /tmp in this example), moves /usr/local/tomcat/webapps.dist to /usr/local/tomcat/webapps, and finally launches Tomcat: sudo docker run \ This is achieved by overriding the command used when launching the container. We need to move this directory to /usr/local/tomcat/webapps. The default applications, such as the manager application, are saved in a directory called /usr/local/tomcat/webapps.dist. The final hurdle to jump is the fact that the Tomcat Docker image does not load any applications by default. This blog post provides some more detail about Docker networking with forwarded ports. Here we have a copy of the manager applications context.xml file with the network filtering disabled: With port forwarding enabled, traffic to an exposed port enters the Docker container via the container's external interface and will be blocked by default. Keep in mind that from the context of a Docker image, localhost means the container's loopback interface, not that of the host. This user is defined in a file called tomcat-users.xml and will be assigned both the manager-gui and manager-script roles, which grant access to the manager HTML interface as well as the API: īy default, the manager application will only accept traffic from localhost. Define a userįirst, we need to define a Tomcat user that has access to the manager application. In this blog post, we look at how to boot a Tomcat Docker image ready to accept new deployments. However, there are a few tricks to getting the manager application loaded and When testing Java deployments with Tomcat, the official Tomcat Docker image provides a convenient way to get a server up and running.
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