Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications.
Less portable, minimal overhead
Most portable,
lots of overhead
Manual
configuration
Traditional VMs
CM tools
Docker
Docker in practice
Containers
How you run
your application
Images
How you store
your application
Dockerfiles
# Set the base image to Ubuntu
FROM ubuntu
# Update the repository sources list
RUN apt-get update
# Install MongoDB package (.deb)
RUN apt-get install -y mongodb-10gen
# Create the default data directory
RUN mkdir -p /data/db
# Expose the default port
EXPOSE 27017
# Default command to start the database
CMD ["usr/bin/mongod", "--port 27017"]
Docker library images
Docker's past, present, and future
Familiar origins
Tons of open
source projects!
Dependency-heavy utilities
2014
Get to 1.0 (production-ready)
Establish partnerships
Round out some rough edges (v1.3)
2015
Make Docker easier to use
Popularize best practices for scaling
"Include more batteries"
Trying it yourself
1
Go all in on a
non-essential service
(avoid using Docker for just development)
2
Use the official
base images
(but don't be afraid to build your own)
3
Install docker-compose
right after you install Docker
