Karuppiah N
I code. I like to teach code.
Introduction to Docker
About me
Karuppiah
Freelancer
You can find me on Twitter, GitHub and "Docker Hub" as
@karuppiah7890
What is Docker ?
Docker is a software container platform
What's a Container ?!
Container in this context, is a term belonging to the concept of "Containerisation". We need to define it first
What's Containerisation ?
It's an operating system feature in which the kernel allows the existence of multiple isolated user-space instances. And such instances are called containers
For more info on Containerization, check
https://en.wikipedia.org/wiki/Operating-system-level_virtualization
What does Docker actually do ?
Docker is used to "package" software into containers
- Containers are a way to package software in a format that can run in an isolated manner
- Unlike VMs, containers do not bundle a full OS - only libraries and settings required to make the software work are needed
- This makes for efficient, lightweight, self-contained systems and guarantees that software will always run the same, regardless of "where" it’s deployed.
Who uses Docker and why ?
- Developers use Docker to eliminate “works on my machine” problems when collaborating on code with co-workers.
- Operators use Docker to run and manage apps side-by-side in isolated containers to get better compute density.
- Enterprises use Docker to build agile software delivery pipelines to ship new features faster, more securely and with confidence for both Linux, Windows Server, and Linux-on-mainframe apps.
Too much talk.
Demo!
Play With Docker (PWD) Training
Play With Docker (PWD)
Commands
$ docker run
$ docker ps -a
$ docker build
docker run
$ docker run
$ docker ps -a
$ docker build
Running many related containers in a single machine ?
Docker Compose
$ docker-compose
Running many related containers in multiple machines ?
Docker Swarm
$ docker swarm
or other software like
Kubernetes
Introduction to Docker
By Karuppiah N
Introduction to Docker
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