Open Stack

Hi all,

This is a summary of Queens PTG discussion for Blazar. We had lots of 
items in the meeting. So I write down main topics in the mail. If you're 
interested in all items, please see the queens PTG etherpad page[1].

Priorities for Queens cycle
---------------------------

We discussed our team priorities for Queens cycle. The main themes for 
the release are resiliency and manageability.  For resiliency, Blazar 
will support a recovering feature from reserved resource failure and 
atomic API transactions. For manageability, Blazar will follow some 
community wide goals and will be refactored about its plugins.

If you'd like to see more details, please go to the etherpad page[2].

API for querying resource usage/availability
------------------------------------------

This is an usability improvement feature. It enables users to query how 
many/how much/how long they can reserve a specific resource/time. 
Blazar supports APIs which provide reservations CRUD operation for users 
now. So users don't have a way to check how many resources are available 
at a specific time window. By the API, users can query how many 
resources are available at a specific time.


Resource Monitoring
-------------------

This is a kind of resource failure recovery mechanism in Blazar. Blazar 
doesn't react reserved resource failures now. For instance, if a 
hypervisor which is reserved by an user for future usage goes down, 
Blazar doesn't re-assign a new hypervisor for the user's reservation. 
By the resource monitoring feature, Blazar will manage reservations well 
against unexpected failures.


Preemptible instance
--------------------

This topic is one of discussions in Nova team[3] and Blazar team was 
involved in the discussion.  Blazar is one of possibilities for "reaper" 
service in the topic since Blazar has a time base reaping feature in 
instance reservation feature of Blazar.  So Blazar team has interest to 
support the feature.


1. https://etherpad.openstack.org/p/blazar-ptg-queens
2. https://launchpad.net/blazar/+milestone/0.4.0
3. 
http://lists.openstack.org/pipermail/openstack-dev/2017-September/122258.html


best regards,
Masahito