Successful Lab Completions Per Country
Analysis
The biggest surprise, for me, were the number of successful lab completions from the Nordic countries (Norway, Sweden, Finland).Way to go up (and over) there!
Also of note:
- More Mid East completions than India
- Spain includes North Africa and that count was higher that I expected
- The Kazakhstan count also includes Turkey
- Participation from Africa
- No participation from Australia or Far East
Please let me know if I interpreted these numbers properly. Perhaps, part of the map was missing from my view.
My Completion Certificate
The Voting App
This is what the running app looked like:
Components
We developed an app using Docker Toolbox that included:Front End
- Python webapp which lets you vote between several options
- Node.js webapp showing the results of the voting in real time
Back End
- Redis Queue to collect new votes
- Java Worker which consumes votes and stores them in the database
- Postgres database backed by a Docker Volume
Architecture Diagram
Project Details
Docker-Compose YAML File
version: "2"
services:
voting-app:
build: ./voting-app/.
volumes:
- ./voting-app:/app
ports:
- "5000:80"
networks:
- front-tier
- back-tier
result-app:
build: ./result-app/.
volumes:
- ./result-app:/app
ports:
- "5001:80"
networks:
- front-tier
- back-tier
worker:
image: manomarks/worker
networks:
- back-tier
redis:
image: redis:alpine
container_name: redis
ports: ["6379"]
networks:
- back-tier
db:
image: postgres:9.4
container_name: db
volumes:
- "db-data:/var/lib/postgresql/data"
networks:
- back-tier
volumes:
db-data:
networks:
front-tier:
back-tier:
This Compose file defines
- A voting-app container based on a Python image
- A reslit-app container based on a Node.js image
- A redis container based on a redis image, to temporarily store the data.
- A Java based worker app based on a Java image
- A Postgres container based on a postgres image
The Compose file also defines two networks, front-tier and back-tier. Each container is placed on one or two networks. Once on those networks, they can access other services on that network in code just by using the name of the service. To learn more about networking check out the Networking with Compose documentation.
To launch your app navigate to the example-voting-app directory and run the following command:
$ docker-compose up -d
This tells Compose to start all the containers specified in the docker-compose.yml file. The -d tells it to run them in daemon mode, in the background.
Last you'll need to figure out the ip address of your Docker host. If you're running Linux, it's just localhost, or 127.0.0.1. If you're using Docker Machine on Mac or Windows, you'll need to run:
$ docker-machine ip default It'll return an IP address. If you only have one Docker Machine running, most likely, that's 192.168.99.100. We'll call that
References
This work is licensed under the Creative Commons Attribution 3.0 Unported License.
