rohityadavcloud commented on code in PR #267: URL: https://github.com/apache/cloudstack-documentation/pull/267#discussion_r856110356
########## source/upgrading/upgrade/_sysvm_restart.rst: ########## @@ -15,7 +15,22 @@ .. sub-section included in upgrade notes. -Once you've upgraded the packages on your management servers, you'll +.. note:: + + From Apache CloudStack version 4.17.0 onward, there is support to live patch + systemVMs, namely, SSVM, CPVM, Routers. Live patching provides support + for zero-downtime upgrades, wherein, the SystemVM software is updated to the + latest code version without having to destroy and recreate them / restart them. + + With this feature, users will have a choice wherein they can use the existing systemVM template with the latest + software by using the live patch feature, or can follow the usual workflow of restarting the + systemVM to use the latest systemVM template. Live Patching systemVMs serves to be especially + useful in cases when the code version has upgraded but the template hasn't. In such a scenario users + will no longer need to restart the systemVMs to use the latest code. Review Comment: @Pearl1594 can you explain in some more detail what is covered in the "zero downtime" and what isn't, esp in the context of CPVM and VRs. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: dev-unsubscr...@cloudstack.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
