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Creating Images Using a Dockerfile

You’ve decided to Dockerize your weather-app. Before you can do this, you'll need to create an image for it. And you'll want to keep the image small, so you will create it using a multi-stage build. Using instructions in a Dockerfile, build the image, then test it by creating a container that uses it.

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Path Info

Level

Intermediate

Duration

1h 0m

Published

Apr 04, 2019

Challenge

Create a docker file

Create a docker file:

vi Dockerfile

Dockerfile contents:

FROM node AS source
RUN mkdir -p /node/weather-app
ADD src/ /node/weather-app
WORKDIR /node/weather-app
RUN npm install

FROM node:alpine
ARG APP_VERSION=V1.1
LABEL org.label-schema.version=$APP_VERSION
ENV NODE_ENV="production"
COPY --from=source /node/weather-app /node/weather-app
WORKDIR /node/weather-app
EXPOSE 3000
ENTRYPOINT ["./bin/www"]

Challenge

Build the image

Use Git commit hash as the image tag:

cd src
git log -1 --pretty=%H
cd ../

Build the image:

sudo docker image build -t linuxacademy/weather-app:[HASH] --build-arg APP_VERSION=2.0 .

Challenge

Deploy a test container using the image just created

Create the weather-app container:

sudo docker container run -d --name weather-app -p 8080:3000 linuxacademy/weather-app:<HASH>

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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