Build the docker containers in CircleCI

[hortongn]

Our current CircleCI config just runs the app in CircleCI's ruby image. We ant to make sure that CircleCI can also build our own Docker containers so we will know if there's a problem with our builds.

[bhanutejags]

Related Links from Circle CI Documentation

Building Docker Images

• How to Build a Docker Image on CircleCI 2.0
• Running Docker Commands
• How to build a CI/CD pipeline with Docker
• Using CircleCI workflows to replicate Docker Hub automated builds

Testing/Validating Circle CI Jobs Locally

• Using the CircleCI Local CLI
• Local CI pipeline development

CircleCI: CI/CD

• Automate GitHub Releases with CircleCI
• Using Workflows to Schedule Jobs
• List of Pre-built Images for Circle CI
  • Incase, we later decide to use MySQL container for testing as part of CircleCI workflow.

Orbs for AWS

• circleci/aws-ecr

Notes about AWS CLI

• AWS CLI v2 is not published to PyPI
• The Circle CI documentation suggests using pip to install AWS CLI but it seems we can only install AWS CLI v1 using that.

apk add py3-pip=20.1.1-r0
pip install awscli>=1.0

• The images provided by Circle CI for building Docker images, seem to be based out of Alpine, but installing AWS CLI v2 might be a bit tricky, given that Alpine uses Musl, and AWS CLI v2 is compiled against glibc.
  • [v2] Distribute binaries for alpine / musl libc
  • aws-cli-v2 issue with alpine using Docker
• But it does seem like we can run prebuilt images of AWS CLI v2 within Circle CI, and use them for any AWS related activities in the job, the usage would be something like:

docker run --rm -it -e AWS_ACCESS_KEY_ID="" -e AWS_DEFAULT_REGION="" -e AWS_SECRET_ACCESS_KEY="" amazon/aws-cli ecr get-login-password

Cleaning up older images automatically

• ECR Lifecycle Policies