[OASIS Issue Tracker] Updated: (TOSCA-93) Use Case: Enabling Load balancing on "Tiers" (VMs) either within a service template or an existing provider service

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

     [ http://tools.oasis-open.org/issues/browse/TOSCA-93?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthew Rutkowski  updated TOSCA-93:
------------------------------------


Additional Load Balancing considerations/use cases/scenarios were discussed, but the SC agreed to merge these into this single issue: Here are the additional descriptions/notes for consideration when developing this use case:

a) Aggregates a set of EndPoints (under a LB); 
Semantics:  Protocol (HTTP, HTTPS, TCP),
Session Stickiness (Bind requests from same client to specific server (or not)),
Load distribution algorithm (Round robin, IP hash, least sessions, ...), 
Health check (Determine if pool member is considered available or not)

b) Tier is modeled to require load balancing (with LB semantics for a specific EndPoint).
Deployer tries resolve the requirement to a capability in the usual way.
Deployer may a) deploy a new load balancing tier/service, b) use an existing tier/service, or c) use the cloud's LB service to provide the capability

> Use Case: Enabling Load balancing on "Tiers" (VMs) either within a service template or an existing provider service
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: TOSCA-93
>                 URL: http://tools.oasis-open.org/issues/browse/TOSCA-93
>             Project: OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC
>          Issue Type: Task
>          Components: Interop
>         Environment: Use case for development against TOSCA-v1.0-cs01.
>            Reporter: Matthew Rutkowski 
>            Assignee: Derek Palma
>
> Support the ability to:
> 1.Deploy another tier of one or more VMs with Load balancing software
> 2.Use the Load Balancing Service provided by the cloud by registering the load balanced VMs or any other programming
> Example (2 scenarios):
> TBD
> Notes:
> Matt: does a LB need to be a specific (normative node type) or can these load balancing requirements be fulfilled using tier (or other node) properties that convey load balancing constraints?
> Derek: keep as one use case for now.
> References:
> https://www.oasis-open.org/apps/org/workgroup/tosca-interop/download.php/48513/TOSCASugarCRMUseCase-CompleteConnectivity.pptx
> https://www.oasis-open.org/apps/org/workgroup/tosca-interop/download.php/48514/ConsiderationsFor2TierWebApplications.docx

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