Kaniko
Kaniko is an open-source tool for building container images from a Dockerfile inside a container or Kubernetes cluster without requiring privileged access to a Docker daemon. It executes each command in the Dockerfile in userspace, making it suitable for secure, isolated environments like CI/CD pipelines. It supports building images from various sources, including local directories, Git repositories, and cloud storage.
Developers should use Kaniko when building container images in environments where Docker daemon access is restricted or unavailable, such as in Kubernetes pods, Google Cloud Build, or other CI/CD systems that prioritize security. It is ideal for automated build pipelines that require reproducible and secure image builds without the need for Docker-in-Docker setups, reducing attack surfaces and improving compliance in production workflows.