Base
Hardened build
minimal ports, security patches applied at build time
CentOS 7 Minimal
Azure
Operating Systems
CentOS Linux 7.9 with a reduced package set, for legacy migration
Overview
CentOS Linux is a free, open source community rebuild of Red Hat Enterprise Linux, binary compatible with RHEL. This image is CentOS Linux 7.9.2009, the final CentOS 7 release, with the packages an Azure guest cannot use removed: 296 installed packages instead of 309, and 40 percent less package payload than the standard cloudimg CentOS 7 image.
CentOS Linux 7 reached end of life on 30 June 2024 and receives no further upstream security updates, so this image is patched only to its capture date from the frozen CentOS 7.9 vault and is provided for legacy migration workloads. A smaller package set means fewer components that can carry a vulnerability, but it is not a substitute for migrating to a supported distribution.
Why the cloudimg image
The cloudimg image is a hardened CentOS Linux 7.9 base with every available vault package applied at build time and no baked in credentials: access is by the SSH key you choose at launch, so no two instances share a secret. Nothing is removed by force: every trimmed package was dependency checked first, so the image carries no broken dependency and anything you need reinstalls normally, and the image ships a manifest recording exactly what was removed and why. Its repositories are already repointed to the CentOS 7.9 vault so package management keeps working after the original mirrors were retired. Backed by 24/7 support while you migrate.
Common uses
- Running or testing software certified only on the CentOS 7 or RHEL 7 platform while you re platform
- A lean base for RHEL 7 ABI compatibility and package build work
- Lift and shift of an existing CentOS 7 estate into Azure on a reduced attack surface
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