Open Stack

Dear colleagues,

At the moment I'm working on deprecating Fuel upgrade tarball. Currently,
it includes the following:

* RPM repository (upstream + mos)
* DEB repository (mos)
* openstack.yaml
* version.yaml
* upgrade script itself (+ virtualenv)

Apart from upgrading docker containers this upgrade script makes copies of
the RPM/DEB repositories and puts them on the master node naming these
repository directories depending on what is written in openstack.yaml and
version.yaml. My plan was something like:

1) deprecate version.yaml (move all fields from there to various places)
2) deliver openstack.yaml with fuel-openstack-metadata package
3) do not put new repos on the master node (instead we should use online
repos or use fuel-createmirror to make local mirrors)
4) deliver fuel-upgrade package (throw away upgrade virtualenv)

Then UX was supposed to be roughly like:

1) configure /etc/yum.repos.d/nailgun.repo (add new RPM MOS repo)
2) yum install fuel-upgrade
3) /usr/bin/fuel-upgrade (script was going to become lighter, because there
should have not be parts coping RPM/DEB repos)

However, it turned out that Fuel 8.0 is going to be run on Centos 7 and it
is not enough to just do things which we usually did during upgrades. Now
there are two ways to upgrade:
1) to use the official Centos upgrade script for upgrading from 6 to 7
2) to backup the master node, then reinstall it from scratch and then apply
backup

Upgrade team is trying to understand which way is more appropriate.
Regarding to my tarball related activities, I'd say that this package based
upgrade approach can be aligned with (1) (fuel-upgrade would use official
Centos upgrade script as a first step for upgrade), but it definitely can
not be aligned with (2), because it assumes reinstalling the master node
from scratch.

Right now, I'm finishing the work around deprecating version.yaml and my
further steps would be to modify fuel-upgrade script so it does not copy
RPM/DEB repos, but those steps make little sense taking into account Centos
7 feature.

Colleagues, let's make a decision about how we are going to upgrade the
master node ASAP. Probably my tarball related work should be reduced to
just throwing tarball away.


Vladimir Kozhukalov
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