Note
Note: This is a commercial feature. For information on how to purchase a Virtuozzo license and enable commercial features, please visit https://virtuozzo.com/.
Virtuozzo ReadyKernel is a kpatch-based service that offers a more convenient, rebootless alternative to updating the kernel the usual way and allows you not to wait for scheduled server downtime to apply critical security updates. ReadyKernel enables you to receive cumulative kernel patches that fix critical security issues and apply these patches without having to reboot the server. ReadyKernel updates are released for Virtuozzo kernels younger than one year. When a kernel turns a year old, it should be updated, e.g., to the latest one, so you can keep receiving ReadyKernel updates.
Upon installation, the patches are loaded into server RAM and immediately applied to the kernel. If the server reboots, these patches are reapplied to the kernel on boot.
If later you install a new kernel or major kernel update that requires a reboot, the downloaded patches will remain on the server but will not be applied.
Note
Note: At any time, you can check the details of the applied ReadyKernel update with readykernel info.
ReadyKernel updates can be received and installed automatically or manually as described in the following sections.
