What is Red Hat CoreOS?
summary
Red Hat CoreOS is an immutable, OpenShift-native host that delivers OS images as OCI blobs and applies OSTree transactional updates by pivoting to a new side‑by‑side image, rebooting, and falling back if needed. Installation uses a simple dd image plus Ignition for first‑boot provisioning; runtime is CRI‑O with podman tooling, images built by coreos‑assembler, and updates driven from the cluster via the machine‑config‑operator and machine‑config‑daemon. SSH is discouraged, bare‑metal and Fedora CoreOS variants are planned, and the design emphasizes minimal package sets, controlled mutability, and cluster‑managed versioning.
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chapters (17)
- 0:00Introduction
- 3:56CoreOS Projects
- 8:38Atomic Host
- 11:49Project Atomic
- 13:40OpenShift
- 16:03Philosophy
- 24:17CoreOS Tools
- 25:27CoreOS abstraction layer
- 25:59Container Linux
- 27:22CoreOS Omaha
- 28:50Security
- 31:47Updates
- 35:50Roadmap
- 36:30Fedora CoreOS
- 38:02Expanding to other platforms
- 38:41Sources
- 38:55QA
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