Essential Docker Containers - The Practical Guide

Trace the evolution from hardware to virtual machines to containers and learn how Docker containers package only the needed files and libraries for portable, secure apps across environments.

Explore how the docker daemon powers the docker service, manage images and containers via docker commands, and use registries, private or public, plus orchestration with Kubernetes for multi-host deployments.

Learn to containerize a web server with Docker, pull an http feed, mount host content, and publish ports for external access, while keeping data and dependencies inside the container.

Explore how containers are used across an enterprise and evolve from single-host Docker use to multi-host, microservice architectures that scale resources from development to production.

Understand how Docker containers share the host Linux kernel, the role of base images, and why building and running on the same Linux system reduces compatibility risk.

Choose the right Linux distribution and docker-ready environment for building and deploying containers, from rpm or deb options to Ubuntu and Red Hat, with OpenShift and Kubernetes for streamlined deployment.

Learn how to install and run docker on Fedora using the docker dash io package, pull and build images, and manage containers, while exploring daemon configurations and related tools.

Learn to install and run Docker on Ubuntu by updating packages, installing docker.io, starting and verifying the Docker service, and using it to create, run, and manage containers and images.

Learn how to subscribe your Red Hat Enterprise Linux system, enable the optional and extras repositories, install Docker, and start and enable the Docker service on RHEL 7.

Learn to develop, deploy, and manage multi-container applications with OpenShift, using local or hybrid cloud deployments and interaction via web console or OC/Docker CLI.

Learn to install and run OpenShift with Minishift on Red Hat Enterprise Linux, including setting up the KVM hypervisor, libvirt group, the Docker driver, and configuring OC and Docker access.

Explore lean linux distributions designed to run containers in cloud environments, with small footprints and atomic upgrades, and learn to create a Fedora atomic image for KVM or OpenStack.

Download Fedora atomic host iso, create a virtual machine with virt-manager, install atomic host, start Docker service, and pull Fedora images to run containers and prepare for Docker registries.

Explore how Docker registries store images and run containers, including base images from Linux distributions and app-specific images like WordPress, MongoDB, PostgreSQL from Docker Hub.

Navigate Docker Hub to select official Ubuntu-based images, view tags and Dockerfile links, explore image history and source lists, and set up a private registry to store images.

Install and configure a private Docker registry on Fedora, enable the system service, adjust the firewall, and verify port 5000 is open for pushing and pulling images.

Learn to pull and push docker images to public and private registries using docker pull and docker push, while managing local storage under /var/lib/docker and cleaning unused images.

Tag the Fedora image and push it to the local registry at localhost:5000 for faster access, then pull Ubuntu and explore image aliases like trusty and latest.

OpenShift's integrated registry streamlines pulling builder images and pushing your own through the web console. Select builder images, such as Java and JBoss with Tomcat, and view them at 172.30.1.1:5000.

Learn to run applications from downloaded container images with Docker run, using bind mounts, environment variables, and optional entrypoint overrides; map ports and name containers.

Launch an existing container image with docker run in detached mode, map ports, and mount a host data directory for a simple http server using the Fedora latest image.

Inspect a running Docker container with Docker inspect to reveal its configuration in JSON, then use the dash dash format option to query PID, IP address, and bind mounts.

Inspect a running docker container to view its image, memory usage, and bind mounts with docker inspect, then verify connectivity and port mappings using ping and nmap.

Master container lifecycle by listing, starting, stopping, restarting, killing, and removing containers with docker ps, docker start, docker stop, docker restart, docker kill, and docker rm.

learn how to commit a container to an image, save the image to a tar file, transfer and load it on another system, and tag images for organization.

Use the Docker tag command to label images with multiple names, including latest and release tags, and push tagged images to a local registry.

Tag images correctly to target private registries with location and port, then push to the right registry. Tag with your Docker Hub username to push publicly.

Learn to monitor Docker health and activity using Docker commands and service checks across Linux systems, including info, version, top, diff, and history, plus systemctl or service status.

Verify docker installation and service status across Linux distributions. Use rpm and systemctl, and run docker commands for info, version, ps, top, diff, images, history, and events to manage containers.

Learn how to remove unused docker containers and images, stop running ones, use docker rm and docker rmi, and prevent intermediate containers with the --rm option.

Automate container builds with a Dockerfile by identifying a base image, installing software, and running commands, while each instruction creates committed intermediate container and builds can start from any step.

Explore how Dockerfile instructions shape container builds, from base image selection and maintainer to run, cmd, expose, env, add, entrypoint, volume, user, workdir, and onbuild across builds.

Build container images from docker files using a Red Hat Enterprise Linux 7 base, install MongoDB, configure with conf and repo files, mount volume, and expose port 27017.

Learn to build container images from a Dockerfile using no-cache to force fresh builds, install MongoDB and related packages, configure ports, volumes, and startup commands.

Build docker containers securely by running as non-root, using specific image tags, one process per container, and standard packaging; manage env variables, and prepare for orchestration and storage.

Discover how builder images combine base operating system components with runtime tools, and how custom base images start from scratch for full control over your container.

Explore base images and builder images for Red Hat Enterprise Linux, including atomic and rel images, with hands on guidance on pulling, inspecting, and comparing container contents and package managers.

Explore how kubernetes provides container orchestration and cluster management from master and nodes to pods and replication controllers, and manage a demo cluster with the cube control command.

Explore how a manually configured Kubernetes cluster on Linux runs services and containers, queries status with kubectl, inspects endpoints, and scales replication controllers from three to four.

Create a containerized application with OpenShift using the oc command or web console, expose a route in your browser, and explore the resulting container through either interface.

Install git, log into mini shift, build an OpenShift Node.js X app with oc new app, expose the route, and explore the web console, pods, and registry.

Install cockpit on Red Hat Enterprise Linux and use its containers tab to monitor containers and images, view CPU and memory, and pull or start images via a web interface.

install cockpit with docker support on Red Hat Enterprise Linux to view and manage containers and images via a dashboard. start cockpit service and access localhost:99 to run containers.

Explore setting up container development environments with Docker and Red Hat tools. Use the Red Hat container development kit with vagrant for local Docker and Kubernetes, plus OpenShift CI/CD workflows.

Explore how Red Hat OpenShift provides a complete container development environment with Docker and Kubernetes, enabling you to provision, manage, and scale cloud applications via GUI or CLI.

Develop containers efficiently by following Docker best practices for builds, build directories, and selecting essential software. Understand image layers, cached data, and official image guidelines to create reusable, secure containers.

Understand how Docker build caching, the no-cache and pull options, and rm cleanup affect build efficiency, and learn container scope, microservice design, and deploying with Kubernetes.

Explores default docker networking and how to configure the docker daemon, host and container networking modes, and how to expose ports for containers using bridge, none, host, and container networking.

Explore docker networking by inspecting host interfaces, observing the docker0 bridge, and running containers with and without default networking, including host networking for direct host access.

Attach host storage to containers with docker run -v and mount points, while managing the docker daemon storage at /var/lib/docker and relocating it to a new partition with -g.

Learn how to attach host storage to a Docker container using the -v option, resolve permissions with privileged mode, and share volumes between containers to persist files on the host.

Understand how Linux containers isolate processes via namespaces, share host resources through selective mounts and privileges, and use Docker run options like --pid=host, -v, --net=host, --ipc=host, and --privileged.

Demonstrates opening container privileges to the host by exposing host process tables, mounting the host filesystem, and accessing host network interfaces for practical Docker container administration.

Understand why privileged containers aid atomic hosts by providing admin tools, monitoring, and data collection through super privilege containers like rail tools, syslog, and SADC, managed with the atomic command.

Understand how to use super privilege containers, including the Well Tools, syslog, and SADC containers, by installing and running them with atomic to access host resources.

Use trusted repositories, patch containers, and rebuild images with updated packages to minimize exploits. Sign, scan, and verify images with freshness grades to ensure security and limit host privileges.

Choose an operating system with strong container isolation, including read-only kernel access and SELinux mandatory access control. Use cgroups and namespace separation to limit resources and protect the host.

Explore OpenShift security features, including a container registry with RBAC, vulnerability tagging, and metadata for license compliance, plus secure build practices and policy-based deployments.

Explore application dockerfiles built on scratch, CentOS, and Ubuntu bases, showing how to add files, install systemd, configure WordPress with Apache and MySQL, and run a Firefox VNC container.

Explore how the Open Container Initiative standardizes container formats and runtimes to promote portability and security, while introducing Run C, builder, and Atomic Command.

Explore inspecting and copying registry images with Scorpio, then use atomic pull, install, and run to deploy a privileged syslog container that mounts host files.

Expect microservices to become smaller and more discrete, with continuous integration and deployment tools driving faster deployment, standardized images, and more services and templates for building applications.

Apply what you learned by installing Docker on your preferred Linux distribution, then run and create your own containers while exploring a thriving Docker community.