LHS Episode #349: Docker Deep Dive

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Segment 1 (Deep Dive)

• Docker

• Components

• Docker Engine

• Docker Build

• Docker Compose

• Docker Desktop (Mac/Windows)

• Concepts

• Shares resources from the OS kernel.

• Not meant to run a virtual machine but to perform a single task or computation. The container only lasts as long as the process/computation within it is active.

• Installation

• Do not use “sudo apt install docker” in your package manager.

• https://lhs.fyi/ma (Ubuntu installation procedure)

• Allow unprivileged users to run Docker

• sudo usermod -a -G docker $USER

• Useful Commands

• docker run (spin up a Docker container)

• -d (detached)

• -i (interactive / map stdin to container)

• -t (invoke psuedo terminal on run)

• -p (map external port to container port)

• -v (map external filesystem to container filesystem)

• -e (assign env variable to container)

• –network (specify container network options)

• docker ps [-a] (see running [and ended] Docker containers)

• docker rm (remove a container)

• docker images (see installed images)

• docker rmi (remove image)

• docker pull (download an image)

• docker exec (run a command inside a container)

• docker attach (foreground detached container)

• docker inspect (details dumped as JSON)

• docker network ls (show container networks)

• Docker Storage

• /var/lib/docker/(aufs,containers,image,volumes)

• docker volume create

• -v data_volume:

• -v : (bind mount existing data)

• –mount type=<>,source=,target=<>

• Resources

• https://lhs.fyi/mb (chrip Docker image)

• https://lhs.fyi/mc (SDRAngel Docker image)

• https://lhs.fyi/md (YouTube Docker tutorial)

Segment 2 (Announcements & Feedback)

• E-mail from Ian, NV4C