Simple presentation on Docker compose and swarm

1. Docker Compose and Docker Swarm
By Tanmay Mehra

2. What is Docker ?
Docker is an open platform for developing, shipping, and
running applications.
Docker provides a way to run almost any application securely
isolated in a container.
The isolation and security allow you to run many containers
simultaneously on your host.
The lightweight nature of containers, which run without the
extra load of a hypervisor, means you can get more out of
your hardware.

3. Docker Components
Docker: the open source container virtualization platform
Docker Hub: SaaS platform for sharing and managing Docker
images
Docker Daemon runs on a host machine and does the heavy
lifting of building, running, and distributing Docker
containers.
Docker client is a Docker binary that accepts commands from
the user and communicates back and forth with daemon.

4. How does it work ?

5. Docker Demo
Create docker-machine
Pull an image
Create a Container
Start a container
Stop and Remove a container

6. Docker Compose
Compose is a tool for defining and running complex
applications with Docker.
With Compose, you define a multi-container application in a
single file, then spin your application up in a single command
which does everything that needs to be done to get it running.
Compose is great for development, testing, and staging
environments, as well as CI workflows.

7. How to use Docker
Compose ?
Define your app’s environment with a Dockerfile so it can be
reproduced anywhere.
Define the services that make up your app in docker-
compose.yml so they can be run together in an isolated
environment.
Lastly, run docker-compose up and Compose will start and
run your entire app.

8. Docker Compose

9. Docker Compose Demo
Install docker compose
Create a compose file docker-compose.yml
docker-compose up
check containers created
check server up

10. Docker Swarm
Docker Swarm provides native clustering to Docker.
It turns a pool of Docker hosts into a single, virtual Docker
host.
Docker Swarm solves one of the fundamental limitations of
Docker where the containers could only run on a single
Docker host.

11. Docker Swarm Components
like consul, zookeeper and etcd.

12. Swarm Scheduling
Strategies
The Docker Swarm scheduler features multiple strategies for
ranking nodes. The strategy you choose determines how
Swarm computes ranking.
spread: Swarm optimizes for the node with the least number
of running containers
binpack: The binpack strategy causes Swarm to optimize for
the node which is most packed.
random: The random strategy, like it sounds, chooses nodes at
random regardless of their available CPU or RAM.

13. Docker SwarmDemo
Create Swarm manager
Create Swarm nodes
Join swarm nodes with Swarm manager
Create containers using swarm manager
Run the application

14. Thank You !!