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Domain Quotas (DRAFT) Domain Quotas (DRAFT)

Domain Quotas (DRAFT) - PowerPoint Presentation

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Domain Quotas (DRAFT) - PPT Presentation

Leandro Rosa Tiago Martins Context Problem Cloud Admin is not able to limit resources usage within a domain Solution Domain Quotas Constraints Services eg nova should continue enforcing quotas ID: 269562

quotas domain cloud region domain quotas region cloud admin keystone quota usage vcpus services update assignment cross views nova regions distribution glance

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Slide1

Domain Quotas (DRAFT)

Leandro Rosa

Tiago MartinsSlide2

Context

Problem: Cloud Admin is not able to limit resources usage within a domain

Solution: Domain Quotas

Constraints

Services (e.g. nova) should continue enforcing quotas

Keystone should concentrate the public APIs

Issue: How Keystone can distribute domain quotas to services?Slide3

Approaches

Cross-Region Domain Quotas (based on Update and Usage)

Cloud Admin sets domain quotas

Services exchange quotas usage

Keystone continuously distributes domain quotas to regions

Keystone-centric

Collaborative (Voucher)

Per-Region Domain Quotas (based on Update)

Cloud Admin sets domain quotas

Keystone distributes domain quotas to services

Global assignment

Individual assignmentSlide4

Cross-Region Domain QuotasSlide5

Cross-Region Domain Quotas: Use Cases

Pre-requisite: Default domain quotas are in place

Cloud Admin sets domain quotas (UPDATE)

Cloud Admin views domain quotas

Cloud Admin views domain quotas usage

Cloud Admin views domain quotas usage per region

Cloud Admin deletes domain quotas – back to default valuesSlide6

Cross-Region Domain Quotas: Distribution

Keystone

Region 1

Nova

Glance

Region n

Nova

Glance

...

...

...

Domain “A” vCPUs: 100

vCPUs: 10

vCPUs: 20

Services exchange quotas usage

Keystone continuously distributes domain quotas to regionsSlide7

Cross-Region Domain Quotas: Approaches

Keystone-centric

Distribution intelligence is in Keystone only

Approach #1: Polling

“Service, how many quotas are you using?”

Collaborative

Distribution intelligence is spread over Keystone and services

Approach #1: Vouchers (Service request)

“Keystone, I need a quota voucher now/in a short-term”

Note: We are

not

considering a Distributed Database (e.g. MongoDB) neither Message Queue Protocol (e.g. RabbitMQ)Slide8

Cross-Region Domain Quotas

Advantages

Automated distribution

Domain quotas are shared

Global usage view

Disadvantages

Cloud Admin does

not

control quota distribution

Not suitable for regions that have different infrastructure (e.g. KVM and ESX)

Recommended for similar regions (e.g. same hypervisor type)Slide9

Per-Region Domain QuotasSlide10

Per-Region Domain Quotas: Use Cases

Pre-requisite: Default domain quotas are in place

Global Assignment

Cloud Admin sets domain quotas (UPDATE)

Cloud Admin views domain quotas

Cloud Admin views domain quotas usage

Cloud Admin deletes domain quotas – back to default values

Individual Assignment

Cloud Admin sets domain quotas for each region (UPDATE)

Cloud Admin views domain quotas per region

Cloud Admin views domain quotas usage per region

Cloud Admin deletes domain quotas per region – back to default valuesSlide11

Per-Region Domain Quotas: Global Assignment

Keystone

Region 1

Nova

Glance

Region n

Nova

Glance

...

...

...

Domain “A” vCPUs: 100

vCPUs: 100

Keystone distributes domain quotas to services (on update only)

vCPUs: 100Slide12

Per-Region Domain Quotas: Individual Assignment

Keystone

Region 1

Nova

Glance

Region 4

Nova

Glance

...

...

...

Domain “A” Region 1 vCPUs: 100

vCPUs: 100

Keystone distributes domain quotas to services (on update only)

vCPUs: 200

Domain “A” Region 4 vCPUs: 200Slide13

Per-Region Domain Quotas

Advantages

Cloud Admin controls the domain quota distribution per region

Fine-grained region control

Suitable for regions that have different infrastructure (e.g. KVM and ESX)

Disadvantages

No domain quotas sharing

No global domain quota usage view

Global Assignment: Recommended for similar regions (e.g. same hypervisor type)

Individual Assignment: Recommended for different regions (e.g. unlike hypervisor types)Slide14

PlanningSlide15

Effort Estimate

Approach

Effort

Estimate

(EW)

Cross-Region Domain Quotas (Voucher)

12

Per-Region Domain Quotas

6Slide16

Cross-Region Domain Quotas (Voucher)

Use Case

/ Underlying Functionality

Effort

Estimate

(EW)

Distributor:

middleware with responsability of quota distribution, revocation. Tracking of quotas , quota expiration control.

4

Domain Quota Driver: check,

reserve, commit, rollback and enforcement of quotas. Decides when to ask for more quotas to Distributor. Developed as expecting a plugin to predict quota usage. Keep quota consumation to feed predictor plugin.

4

Predictor Plugin: decides how much quota the

Domain Quota Driver must ask for the Distributor.1CRUD – how to update quotas and how

to inform the services. Deletion – back do defaults and sanity checks2Unit

testing, code review, etc1Total12Slide17

Per-Region Domain Quotas

Use Case

/ Underlying Functionality

Effort

Estimate

(EW)

CRUD – update

quotas and sanity check, delete quota: back to default values

2

Domain

Quota Driver: check, reserve, commit , rollback and enforcement of quotas.

3

Unit testing, code review, etc1Total

6Slide18

Thank you