Create a Node Microservice — Part 2

Extending from part-1, this uses the Dockerfile to create an image of the microservice container.

Create Dockerfile

Dockerfile allows us to provide instructions for creating an image and run a container. Instead of using command line we can specify a Dockerfile to create our Node image..

File: Dockerfile
FROM ubuntu:latest
RUN apt-get update
RUN apt-get nodejs nodejs-legacy npm

Save the above file and then build the image. Docker builds this image in layers and caches the layers.

host$> docker build -t nodejs:0.1 .

Now, lets copy our Microservice code in the container and build it again.

File: Dockerfile
FROM ubuntu:latest
RUN apt-get update
COPY hello-microsvc/package.json src/
RUN apt-get nodejs nodejs-legacy npm
COPY hello-microsvc src/
WORKINGDIR src/
CMD ["npm", "start"]

Create a final version of the docker image

host$> docker build -t microsvc:0.2 .

Test your micro service by running the following command

host$> docker run -d -p 3000:3000 microsvc:0.2

Find the IP to use in the browser

host$> docker-machine ip
192.168.1.100

Go to http://192.168.1.100:3000/api/