The Dockerfile is where you define the commands that populate your docker container.
The idea is to have easy to start and easy to stop services that are stateless, and don't "expect" stuff. (Not sure I understand that exactly, but okay.)
Web app stack example: LAMP would implement Apache as one container, MySQL as another, and PHP as another (well, maybe A+P as one.)
Maybe one container for a cache, too.
Keep em clean, keep em modular.
Copy command allows you to copy stuff from local host system into the docker image.
Add command works too, but copy less complicated.
Finding Dockerfile examples
The dockerfiles used to create various docker images are usually available with the image itself and are usually quite simple. That's the idea, anyway.
FROM ubuntu RUN apt-get update RUN apt-get -y install stunnel CMD ["stunnel"]
To build custom versions, this dockerfile  might be better:
# stunnel Server # # VERSION 0.0.1 # Building from Ubuntu Precise FROM ubuntu:precise MAINTAINER Courtney Couch, email@example.com RUN apt-get update RUN apt-get upgrade -y RUN apt-get -y install build-essential wget RUN apt-get -y install openssl libssl-dev ENV STUNNEL_VERSION 4.56 RUN wget -O - ftp://ftp.stunnel.org/stunnel/archive/4.x/stunnel-$STUNNEL_VERSION.tar.gz | tar -C /usr/local/src -zxv RUN mkdir -p /stunnel VOLUME ["/stunnel"] ADD stunnel.conf /stunnel/stunnel.conf ADD stunnel.pem /stunnel/stunnel.pem # Build stunnel RUN cd /usr/local/src/stunnel-$STUNNEL_VERSION && ./configure && make && make install EXPOSE 443 CMD ["/usr/local/bin/stunnel", "/stunnel/stunnel.conf"]
Building Containers with Dockerfiles
Use the docker build command. Specify the name of the image with -t and specify the location of the Dockerfile. Here is an example, checking out a tiny repo with a single dockerfile:
$ mkdir ~/docker $ cd ~/docker $ git clone https://charlesreid1.com:3000/docker/d-stunnel.git $ cd d-stunnel
Now that we are all ready:
$ docker build -t cmr_stunnel .
This creates an stunnel container ready to go in docker, which can be seen by running
$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE cmr_stunnel latest 2b197f506e02 59 seconds ago 219 MB
dockernotes on the virtual microservice container platform
Installing the docker platform: Docker/Installing
Docker Hello World: Docker/Hello World
Creating Docker Containers:
Getting docker containers from docker hub: Docker/Dockerhub
Creating docker containers with dockerfiles: Docker/Dockerfiles
Managing Dockerfiles using git: Docker/Dockerfiles/Git
Running Docker Containers:
Running docker containers: Docker/Basics
Dealing with volumes in Docker images: Docker/Volumes
Removing Docker images: Docker/Removing Images
Rsync Docker Container: Docker/Rsync
Networking with Docker Containers:
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docker podspods are groups of docker containers that travel together
Docker pods are collections of Docker containers that are intended to run in concert for various applications.
Wireless Sensor Data Acquisition Pod
The wireless sensor data acquisition pod deploys containers
This pod uses the following technologies:
Deep Learning Pod
This pod utilizes the following technologies:
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