Google recently introduced kaniko, an open-source tool for building container images from a Dockerfile even without privileged root access.
Prior to kaniko, building images from a standard Dockerfile typically was totally dependent on an interactive access to a Docker daemon, which requires a root access on the machine to run. Such a process makes it difficult to build container images in environments that can’t easily or securely expose their Docker daemons, such as Kubernetes clusters. To combat these challenges, Kaniko was created.
With kaniko, one can build an image from a Dockerfile and push it to a registry. Since it doesn’t require any special privileges or permissions, kaniko can even run in a standard Kubernetes cluster, Google Kubernetes Engine, or in any environment that can’t have access to privileges or a Docker daemon.
The image is built from scratch, and contains only a static Go binary plus the configuration files needed for pushing and pulling images.
To know more about how to run kaniko in a Kubernetes Cluster, and in the Google Cloud Container Builder, read the documentation on the GitHub Repo.
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