Docker. Micro services for lazy developers

Micro Services for Lazy Developers
Eugene Krevenets
github: http://hyzhak.github.io
Docker

Intro / My experience
● node + mongodb
● node + postgres
● python + postgres
● and more
● ...

Intro / My other experience
sometimes they
come back

How does it works / Lightweight
Containers operate at the process level - runC (libcontainer)

How does it works / Isolated
➔ Single Responsibility. One
service - On Container
➔ Share resource between
containers (Volume, Network)

How does it works / Command line

How does it works / For None-Linux
Users
➔ Docker-machine
(VirtualBox)
➔ Docker-compose
➔ Docker

Let’s play / Solo for Nodejs
FROM node:5.2
RUN mkdir /app
WORKDIR /app
COPY package.json /app/
RUN npm install

Let’s play / Solo for Python
FROM python:3.5.0
RUN apt-get update &&
apt-get install -y libmemcached-dev
RUN mkdir /app
COPY requirements.txt /app/
WORKDIR /app
RUN pip3 install -r requirements.txt

Let’s play / Ready made Images

Let’s play / Django Duet
db:
image: postgres
web:
build: .
command: python manage.py runserver 0.0.0.0:8000
volumes:
- .:/code
ports:
- "8000:8000"
links:
- db

Let’s play / Start it
$ docker-compose up

Pit trap
➔ Learning curve
➔ Build time (Layering)
➔ File refresh (use nodemon --legacy-watch key)
➔ Performance
➔ Dockerfile should be at the top
➔ Sometimes Linux VM can breaks itself (VirtualBox)

Thanks! Questions?
My Contacts
Eugene Krevenets
github: http://hyzhak.github.io
twitter: hyzhak / hyzhak_en

Docker. Micro services for lazy developers

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