Vladimir,
To answer your immediate question, I don't think you're at major risk by staying on Centos 6 in the medium term. Centos 6 will be supported by Centos until Nov 30th, 2020. In terms of what ACS will support, I don't think it has been discussed on the list for a while. There will be a point at which it won't make sense based on the the lack of features available and personally I think we might be starting to get close. As of 4.9, we now have a LTS release out and that most likely will be the release most Centos 6 users will stay on. We have been running Centos 7 hosts now for a while and it's a lot more stable in our opinion and just works out of the box, especially with storage backends such as Ceph. If you've been running Centos 6 for a few years, you might be be getting close to a hardware refresh anyway. If you are, you could build a new Centos 7 based cluster and them migrate primary storage to a new cluster. - Si ________________________________ From: Vladimir Melnik <v.mel...@uplink.ua> Sent: Friday, February 17, 2017 12:53 PM To: users@cloudstack.apache.org Subject: Using CentOS-6.x on KVM-hosts - what are the threats? Dear colleagues, I've just realized that my KVM-hosts are running CentOS-6 whilst it's recommended to use CentOS-7 with the new versions of ACS. Everything seems to be fine (some of these hosts are working for a few years), hosts are working and things are great, but I'd like to ask a couple of questions. Here they are. (1) How high is the chance of the next version of ACS (4.10 or 4.11) will be incompatible with CentOS-6? Should I worry about that and consider upgrading to CentOS-7 immediately? (2) What ACS features I'm missing because of that? I suppose that I'll be disappointed if I try to limit a VM's IO-consumption, just because old good QEMU-0.9 won't support it. Am I right? Are there other things that are worth of upgraging to CentOS-7? Thank you very much in advance for your replies! -- V.Melnik
