We have 2 sharepoint on-premises farms 2010 & 2013,which have the following architecture:-
- 2 SharePoint application servers (2010 & 2013) which are installed on Windows server 2008 R2
- 2 SQl servers 2008 R2 installed on Windows server 2008 R2.
now since windows 2008 R2 will have its end of life on January 2020. so we are planning to upgrade the OS for the sharepoint application servers (2010 & 2013) and thier database server from windows 2008 R2 to windows 2012 or 2016 R2. but i am not sure if this will be a straight formawrdward task? or we need to reconfigure or re-install the sharepoint? our on-premises farms have site collections (mainly enterprise wiki + team site), sub-sites and some farm solutions for server-side event recievers.
so i am not sure if upgrading the OS will affect the 2 sharepoint on-premises farms (2010 & 2013) ? or things on paper should work well out of the box?