devops-exercises

Multi-Stage Builds

Objective

Learn about multi-stage builds

Instructions

1. Without actually building an image or running any container, use the following Dockerfile and convert it to use multi-stage:

FROM nginx
RUN apt-get update \
 && apt-get install -y curl python build-essential \
 && apt-get install -y nodejs \
 && apt-get clean -y
RUN mkdir -p /my_app
ADD ./config/nginx/docker.conf /etc/nginx/nginx.conf
ADD ./config/nginx/k8s.conf /etc/nginx/nginx.conf.k8s
ADD app/ /my_cool_app
WORKDIR /my_cool_app
RUN npm install -g ember-cli
RUN npm install -g bower
RUN apt-get update && apt-get install -y git \
 && npm install \
 && bower install \
RUN ember build — environment=prod
CMD [ “/root/nginx-app.sh”, “nginx”, “-g”, “daemon off;” ]

1. What are the benefits of using multi-stage builds?

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