Use Nginx as a Proxy

In this lab you’ll combine Nginx and your Hello application into a single service.

Step 1: Create a Directory for you Nginx Container

Start in a fresh directory:

$ mkdir Nginx 
$ cd Nginx 

Step 1: Get the Default Configuration

We’re going to customize the configuration of Nginx. It’s best to start with working so let’s get the default configuration out of the Nginx container. Run the default container:

 $ docker run -it --rm nginx:stable /bin/bash

The default configuration is in /etc/nginx/conf.d/default.conf. Let’s look at it:

$ cat /etc/nginx/conf.d/default.conf 

Copy and paste the contents into a file called default.conf in your Nginx directory.

Step 2: Customize the Configuration

Add the following stanza to the configuration inside of the server declaration:

location /app/ {
    proxy_pass http://helloapp:5000/;
}

Step 2: Build the Container

Now create a Dockerfile with instructions to customize the configuration:

FROM nginx:stable
COPY default.conf /etc/nginx/conf.d/default.conf

Build your container using docker build:

$ docker build -t proxy:test1 .

Step 3: Create a Docker Network

Your two containers must talk to each other. You need to put them on their own network if you want to do that:

$ docker network create cis-192

Check to make sure it worked:

$ docker network ls 

Step 4: Launch Your Application Server

Now launch your custom application:

$ docker run -it --rm --name=helloapp --network=cis-192 myapp:test1

You should see it’s output.

Step 5: Launch Your Web Proxy

Now launch Nginx:

docker run -it --rm --name proxy --network cis-192 -p 8080:80 proxy:test1

You should see the output of Nginx. If everything worked you can now browse here to see the HTML:

And here to see your application:

Take a screenshot of both pages

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