Hi,
At the recent kolla virtual PTG [1], we discussed the move to python 3
images in the Train cycle. hrw has started this effort for
Ubuntu/Debian source images [2] and is making good progress.
Next we will need to consider CentOS and RHEL. It seems that for Train
RDO will provide only python 3 packages with support for CentOS 8 [3].
There may be some overlap in the trunk (master) packages where there
is support for both CentOS 7 and 8. We will therefore need to combine
the switch to python 3 with a switch to a CentOS/RHEL 8 base image.
Some work was started during the Stein cycle to support RHEL 8 images
with python 3 packages. There will no doubt be a few scripts that need
updating to complete this work. We'll also need to test to ensure that
both binary and source images work in this new world.
When CentOS8 is available, we'll be working on that more with TripleO to ensure it's working and if there are issues we'll likely submit fixes as necessary. Currently
https://review.opendev.org/#/c/632156/ should be the actual support for the python3 bits as currently required when using the RDO provided packages. We're not aware of any outstanding issues but if we run into them, then we will help as needed. We currently use kolla to generate the related Dockerfiles for building with RHEL8 and have posted the issues that we've run across so far. The related work for podman/buildah (if desired) is currently being discussed in a different thread.
Tripleo team - what are your plans for CentOS/RHEL 8 and python 3 this
cycle? Are you planning to continue the work started in kolla during
the Stein release?
As mentioned, we're not currently aware of any outstanding issues around this so as of Stein, the python3 related packages (when available) combined with an 8 based base image+repos should work.
Thanks,
Mark
[1] https://etherpad.openstack.org/p/kolla-train-ptg
[2] https://blueprints.launchpad.net/kolla/+spec/debian-ubuntu-python3
[3] https://review.rdoproject.org/etherpad/p/moving-rdo-to-centos8
[4] https://review.opendev.org/#/c/632156/