Cangrow Weatherapp

This app was implemented in the last session of the Cangrow course of Part Institute. You can use this app as an example to develop this one or other apps.

Senario

Get Masshad weather with a node app and save it in a redis database.

Use HAProxy as a load balancer.
Config proxy server as a High Available service.
Do all things with Docker.

How to run

First of all install the latest Docker on your OS and clone the repository in some directory.

git clone https://github.com/amixsty/cangrow_weatherapp.git

Go to the cloned directory.

cd cangrow_weatherapp

Build HAProxy image.

docker build -t cangrowha ./haproxy/

Build Node app image.

docker build -t weather_app ./app/

Run docker compose.

docker compose up -d

Expect to see something like this in the output of the command ‍‍docker ps.

CONTAINER ID   IMAGE         COMMAND                  CREATED          STATUS          PORTS                               NAMES
639f54d91f4a   weather_app   "docker-entrypoint.s…"   37 minutes ago   Up 37 minutes   3000/tcp                            node3
de2e02409e7e   weather_app   "docker-entrypoint.s…"   37 minutes ago   Up 37 minutes   3000/tcp                            node2
a4184974d195   weather_app   "docker-entrypoint.s…"   37 minutes ago   Up 37 minutes   3000/tcp                            node1
3f72344f002b   redis         "docker-entrypoint.s…"   37 minutes ago   Up 37 minutes   6379/tcp                            redis
81d28967e05e   cangrowha     "docker-entrypoint.s…"   37 minutes ago   Up 37 minutes   0.0.0.0:80->80/tcp, :::80->80/tcp   haproxy

Now open the browser and type 127.0.0.1. You must see the weather of Masshad.
When you refresh the page the IP address must change.
Stop one of the node containers, the program should still work.

Enjoy :)