Add ability to disable certain Heat Deployments to a set of servers

Registered by James Slagle on 2017-02-03

The ability to not rerun all SoftwareDepoyments on every stack-update is commonly requested. The most common use case for this request is scaling up/down compute nodes. In that scenario, it's not strictly necessary to run 5 passes of puppet on every other role in your deployment just to add a single compute node. You should be able to add a compute node to your deployment and leave controllers, etc completely untouched.

A generic way to specify what Deployments get executed on what servers on stack-update would be a useful addition to the framework.

Although, we'd have to document the feature sufficiently about how it is meant to be used as it would be possible to abuse the feature such that stack-updates fail in strange ways. We'd have to explicitly document how to use it for specific use cases (such as scale up of compute nodes), and caution against other uses where users could potentially do unintentional harm.

Blueprint information

Status:
Complete
Approver:
Emilien Macchi
Priority:
Medium
Drafter:
James Slagle
Direction:
Approved
Assignee:
James Slagle
Definition:
Approved
Series goal:
Accepted for pike
Implementation:
Implemented
Milestone target:
milestone icon pike-3
Started by
Emilien Macchi on 2017-06-13
Completed by
James Slagle on 2017-07-24

Related branches

Sprints

Whiteboard

Gerrit topic: https://review.openstack.org/#q,topic:bp/disable-deployments,n,z

Addressed by: https://review.openstack.org/442679
    Add missing name properties on deloyment resources

Addressed by: https://review.openstack.org/442680
    [WIP] Pluggable deployment resources

Addressed by: https://review.openstack.org/442681
    [WIP] Selectively disable deployment resources

Addressed by: https://review.openstack.org/464733
    Server blacklist support

Addressed by: https://review.openstack.org/471876
    Use Deployment actions for blacklist

Gerrit topic: https://review.openstack.org/#q,topic:bug/1699463,n,z

Addressed by: https://review.openstack.org/477542
    Revert "Revert "Blacklist support for ExtraConfig""

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Work Items

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