Looking to install Saltstack and their requirements are SLES sp4. Is OES SP1 upgradeable to SLES sp4?
SuSE Linux Enterprise Server 12 SP2
If you don't have any OES components running on the GW box there's nothing wrong running it on SLES15. As i prefer NSS as the filesystem for GW databases i usually run GW on OES which implies the SLES…
OES boxes get the relevant SLES stuff via the OES Update channels. So essentially an OES 2018SP1 box will be more current on code than a plain SLES12SP3 box (without LTS).
Again, don't look at SLES/Suse when you talk about OES. It's it's own OS now. As such, the SUSE lifecycle has no relevance, the OES lifecycle has. Your sever also does not talk to SUSE for patches.…
In my opinion, it's best to use OES for Groupwise too.
First, NSS beats all Linux filesystems in functionality, reliability and manageability by a huge margin.
Second, the pure SLES license you receive via your Groupwise license comes with no support for the OS whatsoever. I have had that problem recently, where a customer had a SR for his groupwise open that turned out to be a SLES problem in reality. Customer had to buy SLES support to get it solved.
Do you know if OES2018.1 with sles 2012.sp4 is on the way? Because according to https://www.suse.com/lifecycle/ SUSE Linux Enterprise Server 12 SP3's General support has already ended on 30 June 2019.
Is it that our OES annual maintenance subscriptions gives the LTSS patches etc that takes us to 30th June 2022?
Again, don't look at SLES/Suse when you talk about OES. It's it's own OS now. As such, the SUSE lifecycle has no relevance, the OES lifecycle has. Your sever also does not talk to SUSE for patches.
So yes, you do get LTSS patches for your OES Servers vie their OES Update channel(s). The next SP for OES2018 (SP2) will take the SLES components underneath straight to SP5 level.
That depends. If you're running GW on a OES box the let's call it "SLES-part" will be covered by OES support. If you're running GW on SLES15 !!! WITH the SLES code you get for GW !!! you don't have support for the OS. You'd have to purchase a "full-blown" SLES license in order to get this.