Open Stack

Oleg,

In 6.0 we build OS target images during Fuel ISO building and then we just
put them on the ISO. In 6.1 we are planning to build them (at least Ubuntu
one) on the master node. We deliberately don't use DIB because it is all
about cloud case. DIB downloads pre-built cloud images (ubuntu, rhel,
fedora) and customizes them. Unlike cloud case we need long living OS on a
node (we need to be able to update it, install kernel and grub locally, put
different file systems on different block devices) because our case is
deployment. To achieve this goal we need slightly more low level mechanism
than that is provided by DIB. For ubuntu we use debootstrap and for centos
we use python-imgcreate.

Vladimir Kozhukalov

On Wed, Jan 28, 2015 at 10:35 AM, Oleg Gelbukh <ogelbukh at mirantis.com>
wrote:

> Gentlemen,
>
> I have one small question about IBP, and I'm not sure if this is the right
> place to ask, but still: how do you plan to build the images for the
> image-based provisioning? Will you leverage diskimage-builder
> <https://github.com/openstack/diskimage-builder> or some other tool?
>
> Thanks,
>
>
> --
> Best regards,
> Oleg Gelbukh
> Mirantis Labs
>
> On Tue, Jan 27, 2015 at 10:55 PM, Andrew Woodward <xarses at gmail.com>
> wrote:
>
>> I don't see this as crazy, it's not a feature of the cloud, its a
>> mechanism to get us there. It's not even something that most of the
>> time anyone sees. Continuing to waste time supporting something we are
>> ready to replace, and have been testing for a release already is
>> crazy. It adds to the technical debt around provisioning that is
>> broken a chlot of the time. We spend around 11% of all commits of
>> fuel-library to cobbler, templates, pmanager etc
>>
>> It's also not removing it, it will continue to be present to support
>> prior releases, so it's even still available if we cant make IBP work
>> the way we need to.
>>
>> On Tue, Jan 27, 2015 at 2:23 AM, Vladimir Kozhukalov
>> <vkozhukalov at mirantis.com> wrote:
>> > Guys,
>> >
>> > First, we are not talking about deliberate disabling preseed based
>> approach
>> > just because we so crazy. The question is "What is the best way to
>> achieve
>> > our 6.1 goals?" We definitely need to be able to install two versions of
>> > Ubuntu 12.04 and 14.04. Those versions have different sets of packages
>> (for
>> > example ntp related ones) and we install some of those packages during
>> > provisioning (we point out which packages we need with their versions).
>> To
>> > make this working with preseed based approach we need either to insert
>> some
>> > "IF release==6.1" conditional lines into preseed (not very beautiful,
>> isn't
>> > it?) or to create different Distros and Profiles for different releases.
>> > Second is not a problem for Cobbler but it is for nailgun/astute
>> because we
>> > do not deal with that stuff and it looks that we cannot implement this
>> > easily.
>> >
>> > IMO, the only options we have are to insert "IFs" into preseed (I would
>> say
>> > it is not more reliable than IBP) or to refuse preseed approach for
>> ONLY NEW
>> > UPCOMING releases. You can call "crazy" but for me having a set "IFs"
>> > together with pmanager.py which are absolutely difficult to maintain is
>> > crazy.
>> >
>> >
>> >
>> > Vladimir Kozhukalov
>> >
>> > On Tue, Jan 27, 2015 at 3:03 AM, Andrew Woodward <xarses at gmail.com>
>> wrote:
>> >>
>> >> On Mon, Jan 26, 2015 at 10:47 AM, Sergii Golovatiuk
>> >> <sgolovatiuk at mirantis.com> wrote:
>> >> > Until we are sure IBP solves operation phase where we need to deliver
>> >> > updated packages so client will be able to provision new machines
>> with
>> >> > these
>> >> > fixed packages, I would leave backward compatibility with normal
>> >> > provision.
>> >> > ... Just in case.
>> >>
>> >> doesn't running 'apt-get upgrade' or 'yum update' after laying out the
>> >> FS image resolve the gap until we can rebuild the images on the fly?
>> >> >
>> >> >
>> >> >
>> >> > --
>> >> > Best regards,
>> >> > Sergii Golovatiuk,
>> >> > Skype #golserge
>> >> > IRC #holser
>> >> >
>> >> > On Mon, Jan 26, 2015 at 4:56 PM, Vladimir Kozhukalov
>> >> > <vkozhukalov at mirantis.com> wrote:
>> >> >>
>> >> >> My suggestion is to make IBP the only option available for all
>> upcoming
>> >> >> OpenStack releases which are defined in openstack.yaml. It is to be
>> >> >> possible
>> >> >> to install OS using kickstart for all currently available OpenStack
>> >> >> releases.
>> >> >>
>> >> >> Vladimir Kozhukalov
>> >> >>
>> >> >> On Mon, Jan 26, 2015 at 6:22 PM, Igor Kalnitsky
>> >> >> <ikalnitsky at mirantis.com>
>> >> >> wrote:
>> >> >>>
>> >> >>> Just want to be sure I understand you correctly: do you propose to
>> >> >>> FORBID kickstart/preseed installation way in upcoming release at
>> all?
>> >> >>>
>> >> >>> On Mon, Jan 26, 2015 at 3:59 PM, Vladimir Kozhukalov
>> >> >>> <vkozhukalov at mirantis.com> wrote:
>> >> >>> > Subject is changed.
>> >> >>> >
>> >> >>> > Vladimir Kozhukalov
>> >> >>> >
>> >> >>> > On Mon, Jan 26, 2015 at 4:55 PM, Vladimir Kozhukalov
>> >> >>> > <vkozhukalov at mirantis.com> wrote:
>> >> >>> >>
>> >> >>> >> Dear Fuelers,
>> >> >>> >>
>> >> >>> >> As you might know we need it to be possible to install several
>> >> >>> >> versions of
>> >> >>> >> a particular OS (Ubuntu and Centos) by 6.1  As far as having
>> >> >>> >> different
>> >> >>> >> OS
>> >> >>> >> versions also means having different sets of packages and some
>> of
>> >> >>> >> the
>> >> >>> >> packages are installed and configured during provisioning
>> stage, we
>> >> >>> >> need to
>> >> >>> >> have a kind of kickstart/preseed version mechanism.
>> >> >>> >>
>> >> >>> >> Cobbler is exactly such a mechanism. It allows us to have
>> several
>> >> >>> >> Distros
>> >> >>> >> (installer images) and profiles (kickstart/preseed files). But
>> >> >>> >> unfortunately, for some reasons we have not been using those
>> >> >>> >> Cobbler's
>> >> >>> >> capabilities since the beginning of Fuel and it doesn't seem to
>> be
>> >> >>> >> easily
>> >> >>> >> introduced into Nailgun to deal with the whole Cobbler life
>> cycle.
>> >> >>> >>
>> >> >>> >> Anyway, we are moving towards IBP (image based provisioning)
>> and we
>> >> >>> >> already have different images connected to different OpenStack
>> >> >>> >> releases
>> >> >>> >> (openstack.yaml) and everything else which is necessary for
>> initial
>> >> >>> >> node
>> >> >>> >> configuration is serialized inside provision data (including
>> >> >>> >> profile
>> >> >>> >> name
>> >> >>> >> like 'ubuntu_1204' or 'ubuntu_1404') and we are able to choose
>> >> >>> >> cloud-init
>> >> >>> >> template by this profile name.
>> >> >>> >>
>> >> >>> >> And taking into account what it is written above, the
>> suggestion is
>> >> >>> >> to
>> >> >>> >> completely avoid using kickstart/preseed based way of OS
>> >> >>> >> provisioning
>> >> >>> >> by 6.1
>> >> >>> >> for all new releases allowing ONLY old ones to use this way.
>> >> >>> >>
>> >> >>> >> Any opinions about that stuff are welcome.
>> >> >>> >>
>> >> >>> >> Vladimir Kozhukalov
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> >> >>> >
>> __________________________________________________________________________
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>> >> >>> >
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>>
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>> >> >>
>> >> >>
>> >> >>
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>> >> >
>> >> >
>> >> >
>> >> >
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>> >>
>> >>
>> >> --
>> >> Andrew
>> >> Mirantis
>> >> Ceph community
>> >>
>> >>
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>>
>>
>> --
>> Andrew
>> Mirantis
>> Fuel community ambassador
>> Ceph community
>>
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