Example docker container

Minimal docker container based on:

• alpine linux
• python
• flask
• a minmal printenv app!

This docker container is for docker workshops!

Usage

build container

docker build -t mydockerhub/envprinter:0.2 .
docker tag mydockerhub/envprinter:0.2 mydockerhub/envprinter:latest
docker push mydockerhub/envprinter:0.2 
docker push mydockerhub/envprinter:latest

run container

docker rm envprinter
docker run -p 8080:5000 --name envprinter mydockerhub/envprinter:latest

Why this?

• docker rm ... just in case there's an existing container with this name
• docker run ... running a new container
• -p 8080:5000 we expose the listening container port 5000 to port 8080
• --name ... give the container a name, otherwise docker creates one ;-)

Now you can have a look at your famous application with:

• http://localhost:8080 -> if you are running docker local
• http://192.168.56.102:8080 -> if you are using the virtualbox installation in my workshops (maybe your IP is different. You can verify on the console screen!)

Kubernetes

• import both YAML files in directory kubernetes with ```kubectl create -f filename.yaml````
• with kubectl get service envprinter-service you get the port on which the service is reachable

(it's the port number direct before /TCP)

---

Peter Pfläging peter@pflaeging.net

https://www.pflaeging.net

License: Apache 2.0