Containers

Devcontainder.json

• devcontainer.json properties
• Environment variables. Note requires rebuilding.

  "containerEnv": {
      "RAILS_ENV": "test",
      "MYSQL_PWD": "root"
  }

Example:

".devcontainer/devcontainer.json":

{
    "name": "Sandbox Container",
#   "image": "mcr.microsoft.com/devcontainers/ruby",
    "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
    "features": {
        "ghcr.io/devcontainers-contrib/features/mysql-homebrew:1": {}
    }
}

Codespaces

Default Container

Default container do not paid for storage.

Definition ID: univeral

devcontainer-info

The univeral image.

• Content

Cost

• 2-core for 1 day is $2.80 ($0.18 x 2 x 8); 1 month is $56.00 using 20 days

Images

• https://github.com/devcontainers/images/tree/main/src
  • https://github.com/devcontainers/images/tree/main/src/base-ubuntu
  • https://github.com/devcontainers/images/tree/main/src/ruby
  • https://github.com/devcontainers/images/tree/main/src/ruby
• https://github.com/microsoft/vscode-dev-containers
  • https://github.com/microsoft/vscode-dev-containers/tree/main/containers/ruby

Testspace

Azure

For azure-pipelines.yml:

• ubuntu-20.04
  • Defined here
    • MySQL
    • Chrome
    • Chrome Driver
    • Etc

tip

The GitHub Actions Runner uses this image

CircleCI

For config.yml:

• https://registry.hub.docker.com/r/cimg/ruby
• https://registry.hub.docker.com/r/cimg/mariadb

Features

• https://containers.dev/features
  • https://github.com/devcontainers-contrib/features/tree/main/src/mysql-homebrew

References

Doc

• https://docs.github.com/en/enterprise-cloud@latest/codespaces
• https://containers.dev/

Articles

• https://ianmitchell.dev/blog/creating-devcontainers-for-vs-code-and-github-codespaces