Zincati

Zincati https://coreos.github.io/zincati/

rpm-ostree handles multiple on-disk OSTree deployments and can switch between them at boot-time. 
Zincati continually checks for OS updates and applies them via rpm-ostree.

Oct 20 07:58:41 SERVER rpm-ostree[2533713]: Initiated txn FinalizeDeployment for client(dbus:1.674738 unit:zincati.service uid:980): /org/projectatomic/rpmostree1/fedora_coreos
Oct 20 07:58:37 SERVER zincati[863]: [INFO ] staged deployment '32.20201004.3.0' available, proceeding to finalize it
Oct 20 07:55:20 SERVER rpm-ostree[2533713]: Initiated txn Deploy for client(dbus:1.674641 unit:zincati.service uid:980): /org/projectatomic/rpmostree1/fedora_coreos
Oct 20 07:55:16 SERVER zincati[863]: [INFO ] target release '32.20201004.3.0' selected, proceeding to stage it

See also

• Fedora CoreOS, CoreOS Container Linux, Atomic, Ignition, fcct, Fedora CoreOS Config (FCC), rpm-ostree, Zincati, monitoring.coreos.com, Clair