Kaniko is designed to build container images within Kubernetes or other containerized environments without needing a Docker daemon. It achieves this by executing each command in the Dockerfile within a user-space filesystem, creating the image layers directly. This makes it ideal for CI/CD pipelines running in Kubernetes where installing and managing a Docker daemon would be complex and potentially insecure.
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A) This is the opposite of the truth. Kaniko is designed to avoid the need for a Docker daemon and root privileges. Docker, traditionally, required root privileges (though rootless Docker is now possible, it's not the primary distinction here).
> https://docs.docker.com/engine/security/rootless/
B) While Kaniko does create layers, the primary benefit is not speed (it can sometimes be slower due to the extra steps involved in user-space execution) but rather security and suitability for Kubernetes environments. Docker also creates layers.
D) While both can use containerd, this isn't the reason for any performance similarities or differences. The core difference lies in how they build images: Kaniko in user-space without a daemon, and Docker with a daemon (which can use containerd). This fundamental difference in architecture impacts performance and suitability for certain environments.