New features and notable changes

This release changes how /var works (again):

• sysroot: Rework /var handling to act like Docker VOLUME /var by @cgwalters in #3166
• Drop tmpfiles var by @cgwalters in #3168

The mount setup also had a semantic change for those enabling root.transient:

• prepare-root: Switch to a tmpfs for transient root by @cgwalters in #3173

Also related to prepare-root, it is now recommend to enable composefs by simply configuring ostree-prepare-root.conf and not the ex-integrity.composefs variable:

• deploy: Honor prepare-root.conf at deploy time for composefs by @cgwalters in #3165

Other changes

• prepare-root: Unify root.transient with composefs by @cgwalters in #3170
• Release by @cgwalters in #3160
• libostree: write selinux xattr when on non-selinux systems by @mvo5 in #3151
• ostree.repo-config(5): Fix a typo by @smcv in #3167
• Expose MOUNT_ATTR_IDMAP detection result to C code by @rborn-tx in #3169
• docs/atomic-rollbacks: Add a section on rollbacks by @ericcurtin in #3171
• Release 2024.3 by @cgwalters in #3172

New Contributors

• @mvo5 made their first contribution in #3151
• @rborn-tx made their first contribution in #3169

Full Changelog: v2024.2...v2024.3