[openstack-dev] [devstack] Why do we apt-get install NEW files/debs/general at job time ?

Michał Jastrzębski inc007 at gmail.com
Sat Sep 23 03:12:18 UTC 2017

On 22 September 2017 at 17:21, Paul Belanger <pabelanger at redhat.com> wrote:
> On Fri, Sep 22, 2017 at 02:31:20PM +0000, Jeremy Stanley wrote:
>> On 2017-09-22 15:04:43 +0200 (+0200), Attila Fazekas wrote:
>> > "if DevStack gets custom images prepped to make its jobs
>> > run faster, won't Triple-O, Kolla, et cetera want the same and where
>> > do we draw that line?). "
>> >
>> > IMHO we can try to have only one big image per distribution,
>> > where the packages are the union of the packages requested by all team,
>> > minus the packages blacklisted by any team.
>> [...]
>> Until you realize that some projects want packages from UCA, from
>> RDO, from EPEL, from third-party package repositories. Version
>> conflicts mean they'll still spend time uninstalling the versions
>> they don't want and downloading/installing the ones they do so we
>> have to optimize for one particular set and make the rest
>> second-class citizens in that scenario.
>> Also, preinstalling packages means we _don't_ test that projects
>> actually properly declare their system-level dependencies any
>> longer. I don't know if anyone's concerned about that currently, but
>> it used to be the case that we'd regularly add/break the package
>> dependency declarations in DevStack because of running on images
>> where the things it expected were preinstalled.
>> --
>> Jeremy Stanley
> +1
> We spend a lot of effort trying to keep the 6 images we have in nodepool working
> today, I can't imagine how much work it would be to start adding more images per
> project.
> Personally, I'd like to audit things again once we roll out zuulv3, I am sure
> there are some tweaks we could make to help speed up things.

I don't understand, why would you add images per project? We have all
the images there.. What I'm talking about is to leverage what we'll
have soon (registry) to lower time of gates/DIB infra requirements
(DIB would hardly need to refresh images...)

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