virt April 2014

virt@lists.centos.org

14 participants
16 discussions

Re: [CentOS-virt] OpenVZ variant
by Lars Kurth 09 Apr '14

09 Apr '14

Andres, thanks for your interest. Could you elaborate what your thoughts related to CentOS 7 and the CentOS virtualization SIG are? I am not sure I exactly understand what you are proposing and it is also not quite clear to me whether there is some overlap with other SIGs (such as the Cloud SIG). I guess the key question I have is whether you are suggesting / considering to use the output of the virtualization SIG as upstream for OpenNode and would want to contribute to the SIG. Best Regards Lars On 03/04/2014 21:30, Andres Toomsalu wrote: > > Dear Scott, Lars, > > Currently we already have CentOS 6 based respin (called OpenNode - > http://opennodecloud.com) targeted for virtualization - supporting > both OpenVZ and QEMU/KVM at the moment - yet it would be possible to > add Xen/LXC/Docker support as well - as we are based on libvirt. > > We are just discussing some ideas how we would like to develop next > major version - CentOS 7 based virtualization host - yet we would be > really interested for having an open discussion and community based > development - if anybody wants to join in or there will be some > interest to create something like community CentOS virtualization host > project - where we could join. Our current ideas are spinning around > CoreOS like (perhaps stateless) CentOS 7 compute host with modern > clustering built-in (perhaps etcd) - and we still want to continue to > support both containers and full virtual machines on the same host. > Hopefully also Docker will be mature enough soon and supporting OpenVZ > userland tools - as LXC and OpenVZ share the kernel part and > surprisingly LXC seems still not enough mature/feature rich - yet LXC > project has existed already quite a long time (which makes me a bit > pessimistic predicting on future LXC progress pace). LXC container > isolation features still suck a bit (for production systems) and still > no live migration feature - yet support for it seems to come from > OpenVZ team - as http://criu.org. But hopefully we can get rid of > OpenVZ patched kernels - so it will be only the choice of userspace > tools (for containers). > > Our goal would be to have something way simpler than Openstack (which > is huge and quite a mess in its current state - if you really want to > create a production grade system with it) - and to have a nicely > packaged + easy to use system (which might not support all 1001 ways > of doing the same thing - yet enforcing some simple best-practices). > > So - if anybody interested - lets discuss! > > Kind regards, > -- > <http://www.getpostbox.com>---------------------------------------------- > > Andres Toomsalu > http://www.opennodecloud.com <http://www.opennodecloud.com/> > >

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libvirt POSTIN scriplet failure
by Peter Peltonen 08 Apr '14

08 Apr '14

While updating a CentOS 6 Xen domU server with yum I received the following error: Updating : libvirt-0.10.2-29.el6_5.7.i686 65/168 Non-fatal POSTIN scriptlet failure in rpm package libvirt-0.10.2-29.el6_5.7.i686 warning: %post(libvirt-0.10.2-29.el6_5.7.i686) scriptlet failed, exit status 1 After a reboot everything seems to run fine. Anything I should be considered about? Regards, Peter

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OpenSSL Heartbeat exploit agains KVM guest systems
by James B. Byrne 08 Apr '14

08 Apr '14

Is it possible to use this exploit against a kvm guest to read memory used by the host? In other words: if an exploitable service, say httpd with mod_ssl, is running in guest system 'vm1' hosted on system 'virthost' then what implications does that have with respect to guests vm2 and vm3 and to virthost itself? -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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OpenVZ variant
by Scott Dowdle 07 Apr '14

07 Apr '14

Greetings, I was reading the LWN article from today (free to non-subscribers next Thursday). Here's a subscriber link for those who might want to see it now: CentOS and Red Hat - http://lwn.net/SubscriberLink/592723/485ea802859f6c36/ I saw that Xen was mentioned as an area where CentOS went beyond RHEL with CentOS 6... and being that I'm deeply in the OpenVZ community, I thought it might be natural to have an OpenVZ CentOS Variant. I just noticed that the CentOS Virt-SIG page already mentions OpenVZ. Is this only for the upcoming CentOS 7 or would it be possible to produce a spin/remix that is CentOS 6-based that includes the OpenVZ kernel and OpenVZ utils? Looking at the stats provided by the OpenVZ Project (http://stats.openvz.org/) it is obvious that CentOS is the most popular platform for both OpenVZ hosts and OpenVZ containers: Top host distros ------------------- CentOS 56,725 Scientific 2,471 RHEL 869 Debian 576 Fedora 111 Ubuntu 82 Gentoo 54 openSUS 18 ALT Linux 10 Sabayon 6 and Top 10 CT distros ------------------- centos 245,468 debian 106,350 ubuntu 83,197 OR 8,354 gentoo 7,017 pagoda 4,024 scientific 3,604 fedora 3,173 seedunlimited 1,965 This morning I sent out some feelers to the OpenVZ community (via the OpenVZ Users mailing list, blog.openvz.org, and the #openvz IRC channel) to see if any OpenVZ users were already working with the CentOS project (I'm not). So does anyone that is part of this SIG care to tell me how much OpenVZ interest there currently is and how I might become a part of the effort? I know the virt-sig is probably quite broad beyond OpenVZ. TYL, -- Scott Dowdle 704 Church Street Belgrade, MT 59714 (406)388-0827 [home] (406)994-3931 [work]

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Cleaning up virt SIG related wiki pages
by Lars Kurth 04 Apr '14

04 Apr '14

Hi all, I took a little bit of stock in light of preparing the re-launch of the Virtualization SIG as per the board decision recently and noticed that there are quite a few old and out-of-date wiki pages lying around In particular the following pages seem very old (Iast edited in 2007) * http://wiki.centos.org/SpecialInterestGroup/Virtualization * http://wiki.centos.org/SpecialInterestGroup/Virtualization/Packages I suppose these pages should link to http://wiki.centos.org/Manuals/ReleaseNotes/Xen4-01 and the actual SIG description as was discussed and approved by the CentOS board. I don't seem to be able to create an account on the wiki. Do I and George need to wait for someone to create it, or is there a way to self-sign up Regards Lars

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injecting a key into the xen images
by Karanbir Singh 02 Apr '14

02 Apr '14

hi, As a part of the test suite for xen that I've started off - I needed a way to inject a ssh key into the image [1]; so have come up with this : https://github.com/CentOS/sig-virt-t_xen/blob/master/scripts/inject_ssh.sh ; its not pretty and it wont handle lots of use cases, but it does what is needed at hand. Comments ? I'm also considering if we should include this script within the .bz2 file for the image itself ( and for all such images ) Further feature creep, should we now extend this script a bit to also include a 'download and inject ssh key' with some param's like : ./get_image.sh 6.5 x86_64 <path to sshkey> and that can hit http://cloud.centos.org/<calculated path to image>/ ; download it, and add the key. This script could live within centos-release-xen dramatically reducing the barrier to entry and get-go with the xen4centos stack. thoughts ? - KB 1: qcow2, http://cloud.centos.org/centos/6/devel/CentOS-6-x86_64-xen-pv.bz2 -- Karanbir Singh +44-207-0999389 | http://www.karan.org/ | twitter.com/kbsingh GnuPG Key : http://www.karan.org/publickey.asc

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virt April 2014