At MMS2018, one of the more interesting items was the introduction of the new SCCM HA Role (hint: this is in 1805 TP).
After we got done covering the existing SCCM High Availability capabilities (good background here); Kerim did a great job describing and demonstrating this role.
If we examine the following architecture:
You’ll note that the content library was moved to an SMB share (one additional step to make this HA and new functionality). Also, note that SQL Server Always On Availability Groups are added for SQL HA.
Another Server (Primary2) is added to the SCCM hierarchy with the new Site Server HA role added. Initially, it will be operating in Passive Mode.
Tip: this approach can be used to rename a site server, or upgrade the site server OS!
Once the new role, on the new server, is running the original SCCM site will operate in Active mode.
The process to promote (failover) from Primary1 to Primary2 is presently manual, and the net result will be the second server will now be operating in Active Mode.
This framework opens a lot of possibilities for future enhancements in the realm of High Availability!
When time permits, I’ll cover the steps involved in taking advantage of this functionality.