[Devel] CentOS Images and openvz

[Scott Dowdle]

Greetings,

----- Original Message -----
> >> Most of the complaints stem around compromised instances, or bad yum
> >> repo definitions or non managed / non manageable content being
> >> included in the instance content etc. So it would be good to start with a
> >> solid instance (template ?) and try to promote that.
> > 
> > The OpenVZ Project hasn't released any OS Templates with those
> > issues to the best of my knowledge.  If someone is claiming
> > otherwise, I'd love to hear about it.
> 
> Is it possible to download and see these official templates offered ?

Wow, if someone emailed the CentOS mailing list and asked if it was possible to download CentOS isos, what would you say?  For OpenVZ the answer is, "try the 'Downloads' link on the main site or the 'OS Templates' link on the top level page." (of http://wiki.openvz.org/)

Here's direct URLs:

https://wiki.openvz.org/Download/template/precreated (HTML page)

https://download.openvz.org/template/precreated/ (directory index)

OS Templates for OpenVZ Legacy are simple .tar.gz or .tar.xz files that are accessible on pretty much any Linux host that can extract them.

For the Virtuozzo 7 EZ Templates, those don't really ship as pre-created files.  There is an rpm package for each distro that provides metadata (repo defs and package list, etc) and each OS Template is built on-demand (and cached on the user's host) by downloading the packages from the target distro and installing them in a chroot, and then making a ploop disk image out of the install tree and compressing it.  I can get you some that were recently assembled on one of my Virtuozzo 7 beta hosts... but without ploop, they'd be a challenge to mount and access on a non-Virtuozzo 7 Beta host.  If you are wondering what ploop is, see this wiki page about it:

https://wiki.openvz.org/Ploop

Ploop was made available a few years ago for OpenVZ Legacy and is the primary format in Virtuozzo 7 although Virtuozzo 7 also supports qcow2 I believe.  To the best of my knowledge, ploop was designed and implemented before qcow2 was feature complete.

Here are the rpm packages that define the current set of "EZ Templates" for Virtuozzo 7 beta:

https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/c/centos-5-x86-ez-7.0.0-2.vz7.noarch.rpm
https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/c/centos-6-x86_64-ez-7.0.0-1.vz7.noarch.rpm
https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/c/centos-7-x86_64-ez-7.0.0-6.vz7.noarch.rpm
https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/d/debian-8.0-x86_64-ez-7.0.0-4.vz7.noarch.rpm
https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/f/fedora-22-x86_64-ez-7.0.0-2.vz7.noarch.rpm
https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/u/ubuntu-14.04-x86_64-ez-7.0.0-3.vz7.noarch.rpm
https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/u/ubuntu-14.10-x86_64-ez-7.0.0-1.vz7.noarch.rpm
https://download.openvz.org/virtuozzo/factory/x86_64/os/Packages/u/ubuntu-15.04-x86_64-ez-7.0.0-1.vz7.noarch.rpm

Here's a CentOS 7 EZ Template for Virtuozzo 7 Beta that was built on one of my hosts.  I don't have any of others handy because I haven't created any other distro containers recently:

http://img.cs.montana.edu/linux/openvz-precreated-os-templates/V7/centos-7-x86_64.plain.ploopv2.tar.lz4

If you need anything else, just let me know and I'll see what I can do.

TYL,
-- 
Scott Dowdle
704 Church Street
Belgrade, MT 59714
(406)388-0827 [home]
(406)994-3931 [work]