Testing Ansible in a Docker Container: How to Configure Networking
Learn why Ansible cannot reach sibling Docker containers over localhost and how to correctly configure container networking so Ansible can connect to its target hosts.
How to Deploy Java Apps With Docker: A Step-by-Step Guide
Learn how to deploy a Java application inside a Docker container on Linux, from installing Docker and Java to running and persisting your app with Docker volumes.
Using Docker Behind a Corporate Proxy
Running Docker inside a corporate network with a web proxy? Learn how to configure the Docker daemon, Dockerfile ENV variables, and build arguments so that both image pulls and in-container package managers work correctly behind a proxy.
Customizing Your Docker Container for Jenkins on Mesosphere DC/OS
Learn how to build custom Docker images for Jenkins build agents running on Mesosphere DC/OS, including extending the jenkins-dind base image, managing SSH host keys, and wiring up your custom image in the Jenkins UI.
Docker Containers: What Makes Them So Portable?
Docker containers are renowned for their portability across on-premises and cloud environments. Learn how layered filesystems, image layers, and the copy-on-write strategy make this possible.