Well folks its finally here ; http://lists.centos.org/pipermail/centos-announce/2012-July/018706.html
Among the changes, imitating its parent RedHat6.3, OpenOffice is replaced by libreoffice, I have yet to try it out but apparently has a bit more community support and can read .docx files. They are also deprecating matahari, a management API I know little about, in favor of another suite (CIM). RedHat even recommends matahari removal, which is fine by me since I never bothered to learn it 🙂
Bind9.7 is also replaced by Bind9.8 (yea!), a rare move by RedHat in my memory since they dislike changing version numbers in the lifecycle of each distribution.
Another notable addition to CentOS6.3 is the tools to convert physical to virtual machines for use with KVM, virt-p2v and virt-v2v (for migrationg a virtual-to-virtual installation). Unlike RedHat6.3 that ships an .ISO image seperately to boot from in order to use these tools, CentOS includes that .ISO in the .rpm. I look forward to trying it out.
I have already upgraded a number of guests (my KVM host however is still running 6.2, I have not worked up the courage to give it a go yet, it should go well but I can’t be bothered with glitches right about now), and all seems to work smoothly; I did come across one issue however, if you utilize IPv6 resolvers, a new(?) bug in libresolv causes a segmentation fault crash in applications that make a particular call to it; sendmail, freshclam/clamav, emacs, openvpn, chrony, postfix. Here is the Redhat bugzilla entry, as well as the CentOS entry.
Even if only one of your resolvers is an IPv6 address, affected software will crash;
freshclam: segfault at 1 ip 00007f9be8b37596 sp 00007fff9ffac0b0 error 6 in libresolv-2.12.so[7f9be8b2b000+16000] sendmail: segfault at 1 ip 00007f95d7b73596 sp 00007fffa93295a0 error 6 in libresolv-2.12.so[7f95d7b67000+16000]
I look forward to the fix. In the meantime I will get to tinker with P2V/V2V tools.