Chapter3 Avril 2018

See also

• https://avril2018.container.training/intro.yml.html#9

• Les conseils et formations de Jérôme Petazzoni

• Building images interactively
  • Building images interactively
  • The plan
  • Setting up our container
  • Inspect the changes
  • Docker tracks filesystem changes
  • Copy-on-write security benefits
  • Commit our changes into a new image
  • Testing our new image
  • Tagging images
  • What’s next ?
• Building Docker images with a Dockerfile
  • Objectives
  • Dockerfile overview
  • Writing our first Dockerfile
  • Type this into our Dockerfile…
  • Build it!
  • What happens when we build the image ?
  • Sending the build context to Docker
  • Executing each step
  • The caching system
  • Running the image
  • Using image and viewing history
  • Introducing JSON syntax
  • JSON syntax vs string syntax
  • When to use JSON syntax and string syntax
    • String syntax
    • JSON syntax
• CMD and ENTRYPOINT
  • Objectives
  • Defining a default command
  • Adding CMD to our Dockerfile
  • Build and test our image
  • Overriding CMD
  • Using ENTRYPOINT
  • Adding ENTRYPOINT to our Dockerfile
  • Implications of JSON vs string syntax
  • Build and test our image
  • Using CMD and ENTRYPOINT together
  • CMD and ENTRYPOINT together
  • Build and test our image
  • Overriding the image default parameters
  • Overriding ENTRYPOINT
• Copying files during the build
  • Objectives
  • Build some C code
  • The Dockerfile
  • Testing our C program
  • COPY and the build cache
  • Details
  • Next step : multi-stage building
• Multi-stage builds
  • Multi-stage builds
  • Multi-stage builds principles
  • Multi-stage builds in practice
  • Multi-stage builds for our C program
  • Multi-stage build Dockerfile
    • Before the build
  • Comparing single/multi-stage build image sizes
• Publishing images to the Docker Hub
  • Publishing images to the Docker Hub
  • Logging into our Docker Hub account
  • Image tags and registry addresses
  • Image tags and registry addresses
  • Tagging an image to push it on the Hub
    • figlet Dockerfile
• Tips for efficient Dockerfiles
  • Tips for efficient Dockerfiles
  • Reducing the number of layers
  • Avoid re-installing dependencies at each build
  • Example “bad” Dockerfile
  • Fixed Dockerfile
  • Embedding unit tests in the build process