OpenStack Heat

Autoscaling max limit is capped by length of resource.nova_instance column

Bug #1189278 reported by Steve Baker on 2013-06-09

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	OpenStack Heat	Fix Released	High	Christopher Armstrong	OpenStack Heat 2013.2 "havana"

Bug Description

InstanceGroup keeps track of its instances in the resource_id as comma-delimited resource names.

Therefore, the maximum number of instances in a group is limited by the resource.nova_instance column size (255) and the length of the resource name.

References to instances would be better stored in the InstanceGroup metadata rather than the resource_id. Also storing the reference as the instance FnGetRefId would provide more transparency outside heat as to which instances belongs in the group

Steve Baker (steve-stevebaker) on 2013-06-09

Changed in heat:
milestone:	havana-2 → havana-3
importance:	Undecided → High
milestone:	havana-3 → havana-2

Revision history for this message

OpenStack Infra (hudson-openstack) wrote on 2013-06-10: Fix proposed to heat (master)

Fix proposed to branch: master
Review: https://review.openstack.org/32350

Changed in heat:
status:	Confirmed → In Progress

Steve Baker (steve-stevebaker) on 2013-06-10

Changed in heat:
status:	In Progress → Confirmed

Steven Hardy (shardy) on 2013-06-25

Changed in heat:
milestone:	havana-2 → havana-3

Revision history for this message

Christopher Armstrong (radix) wrote on 2013-07-02:

The idea of making InstanceGroup be a nested stack might make this problem easier to solve: https://blueprints.launchpad.net/heat/+spec/instance-group-nested-stack

Changed in heat:
assignee:	Steve Baker (steve-stevebaker) → Christopher Armstrong (radix)

OpenStack Infra (hudson-openstack) on 2013-08-06

Changed in heat:
status:	Confirmed → In Progress

Revision history for this message

OpenStack Infra (hudson-openstack) wrote on 2013-08-08: Fix merged to heat (master)

Reviewed: https://review.openstack.org/38571
Committed: http://github.com/openstack/heat/commit/c6e82c4a38d04ce257a1e10fada34f89c04d527f
Submitter: Jenkins
Branch: master

commit c6e82c4a38d04ce257a1e10fada34f89c04d527f
Author: Christopher Armstrong <email address hidden>
Date: Mon Jul 22 16:35:13 2013 -0500

Refactor InstanceGroup to use a nested stack

    Much of the code of InstanceGroup was able to be deleted in
    preference for using the native functionality of StackResource.
    InstanceGroup now generates a template and updates the nested
    stack when it needs to be created or resized.

blueprint instance-group-nested-stack

Fixes bug 1189278

Change-Id: Ic08a55cad1ac34d69080c0ef2dae4877f1fefd29