Wise Sayings

This is a small Node.js web server application that emits a wise saying on demand via HTTP

Set up

Step 1: Go to the Katacoda Ubuntu Playground

https://katacoda.com/courses/ubuntu/playground

Step 2: Clone the code from GitHub

git clone https://github.com/reselbob/wisesayings.git

Step 3: Navigate to the working directory

cd wisesayings

Running as a standalone Node.JS application

To install the application to run on you local machine

Step 1: Navigate to the application directory

cd ./app

Step 2: Install the application dependenices

npm install

Step 3: Start the application

node index.js

Step 4: Get a Wise Saying in a new terminal window.

Open a second terminal window, then type,

curl localhost:3000

You'll get output similar to the following:

{
    "saying": "Grow angry slowly; there's plenty of time.",
    "date": "2019-10-05T17:42:23.955Z"
}

Step 4: Exit the application in the first terminal window.

ctrl + C

Running as a Docker Container

Step 1: Take a look at Dockerfile

cat Dockerfile

Step 2: Build the container image

docker build -t wisesayings:beta .

Step 3: Run the container

docker run -d -p 3000:3000 wisesayings:beta

Step 4: Confirm the container is running

docker ps -a

Copy the container ID, you'll need it later.

Step 5: Call the application over HTTP using curl.

curl localhost:3000

Step 6: Kill the container.

docker kill <CONTAINER_ID>

Step 7: Remove the container.

docker rm -f <CONTAINER_ID>

Step 8: Remove the container image

Find the container image ID

docker images

Then remove the image

docker rmi -f <CONTAINER_IMAGE_ID>

Step 9: Confirm the image is gone.

docker images

Running on Kubernetes (Optional)

This repo has an example that allows Wise Saying to be run as a Kubernetes deployment and service.

The Kubernetes deployment and service are to be found in

./k8s