Matthew Thode wrote:
On 05/13/2016 12:48 PM, Joshua Harlow wrote:
* Was/is kolla used or looked into? or something custom?
Openstack-ansible, which is Openstack big-tent. It used to be
os-ansible-deployment in stackforge, but we've removed the rackspacisms.
I will say that openstack-ansible is one of the few that have been
doing upgrades reliably for a while, since at least Icehouse, maybe
further.
Whats the connection between 'openstack-ansible' and 'kolla', is there
any (or any in progress?)
The main difference is that openstack-ansible uses more heavy weight
containers from a common base (ubuntu 14.04 currently, 16.04/cent
'soon'), it then builds on top of that, uses python virtualenvs as well.
Kolla on the other hand creates the container images centrally and
ships them around.
So I guess its like the following (correct me if I am wrong):
openstack-ansible
-----------------
1. Sets up LXC containers from common base on deployment hosts (ansible
here to do this)
2. Installs things into those containers (virtualenvs, packages, git
repos, other ... more ansible)
3. Connects all the things together (more more ansible).
4. Decommissions existing container (if it exists) and replaces with new
container (more more more ansible).
5. <<profit>>
kolla
-----
1. Builds up (installing things and such) *docker* containers outside of
deployment hosts (say inside jenkins) [not ansible]
2. Ships built up containers to *a* docker hub
3. Ansible then runs commands on deployment hosts to download image from
docker hub
4. Connects all the things together (more ansible).
5. Decommissions existing container (if it exists) and replaces with new
container (more more ansible).
6. <<profit>>
Yes the above is highly simplistic, but just trying to get a feel for
the different base steps here ;)
The other thing to note is that Kolla has not done a non-greenfield
upgrade as far as I know, I know it's on their roadmap though.
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