The document discusses Docker as a tool for deploying applications in isolated environments, ensuring consistent performance across different systems. It explains the concepts of containers and images, highlighting how Docker differs from virtual machines by encapsulating all necessary components within a complete filesystem. The document also outlines how to create Docker images using a Dockerfile and provides example commands for building and running containers.

1. Docker - Contain that wild application
Marvin Arcilla
10/06/2016
@DevConSummit

2. Problems with deploying
- Need to install Software, Tool, etc
- Different Operating System
- Code Architecture
- etc
“My code works on my machine”

3. What does Docker do anyway?
- Tool for running an application in an isolated environment
- Ensures that it always run in the same environment
- If you say it works on your PC then it will work in all machines!
- Makes collaboration between teams easier
- Quickly scale your application
- Sandboxes your application

4. WAIT…
is this guy talking about
Virtual Machines?

5. How does Docker differ anyway?
- Wraps a piece of software in a complete filesystem that contains
everything needed to run. ( code, libraries, system tools, dependencies, etc)
- Creates a CONTAINER

6. Virtual Machines vs Containers

7. Containers and Images
- Image
- Template for your created application with the environment you want
- Container
- Running Instance of an Image

8. How to create images
- By creating a Dockerfile
- Dockerfile
- Textfile with instructions to setup your application
https://docker.github.io/engine/reference/builder/

9. Inside the Dockerfile
INSTRUCTION arguments #FORMAT
Some Instructions:
FROM baseimage
RUN command
COPY source destinationInDocker
ENV variableName value
EXPOSE portNumber
ENTRYPOINT [“command”, “arg1”, “arg2”, ...]

10. Docker commands
docker build -t imagename locationOfDockerfile #build the image
docker images #list images
docker ps #list containers
docker run imagename #create & run a container
docker run -e var=val
-p hostPort:exposedPort
-d
--name nameOfContainer
imagename

11. Let’s dive into Docker!

12. Thank you

13. Thank you