Four levels of HA in Cloud Foundry
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The document describes the four levels of high availability (HA) in Cloud Foundry: 1) Elastic Runtime distributes application instances across availability zones and replaces failed instances. 2) Application health is monitored and actual and desired states are compared to ensure instances are running. 3) BOSH monitors processes and virtual machines for health and alerts responders if issues arise. Failed VMs are recovered. 4) Infrastructure as a service provides the underlying infrastructure that supports the other HA levels.
![I work on a PaaS…
“For us, PaaS is a set of services aimed at
developers that helps them develop and test apps
without having to worry about the underlying
infrastructure. Developers don't want to have to
worry about provisioning the servers, storage and
backup associated with developing and launching
an app.”
[1] http://www.javaworld.com/article/2078801/java-app-dev/forrester--paas-makes-developers-happy.html
[2] http://www.infoworld.com/d/cloud-computing/paas-primer-what-platform-service-and-why-does-it-matter-212696](https://image.slidesharecdn.com/cfsummit20144levelsha2-140616082404-phpapp02/85/Four-levels-of-HA-in-Cloud-Foundry-3-320.jpg)
![I work on a PaaS…
“For us, PaaS is a set of services aimed at
developers that helps them develop and test apps
without having to worry about the underlying
infrastructure. Developers don't want to have to
worry about provisioning the servers, storage and
backup associated with developing and launching
an app.”
[1] http://www.javaworld.com/article/2078801/java-app-dev/forrester--paas-makes-developers-happy.html
[2] http://www.infoworld.com/d/cloud-computing/paas-primer-what-platform-service-and-why-does-it-matter-212696](https://image.slidesharecdn.com/cfsummit20144levelsha2-140616082404-phpapp02/85/Four-levels-of-HA-in-Cloud-Foundry-4-320.jpg)
Four levels of HA in Cloud Foundry
- 1. © 2014
- 2. FOUR LEVELS OF HA IN CLOUD FOUNDRY Cornelia Davis @cdavisafc [email protected]
- 3. I work on a PaaS… “For us, PaaS is a set of services aimed at developers that helps them develop and test apps without having to worry about the underlying infrastructure. Developers don't want to have to worry about provisioning the servers, storage and backup associated with developing and launching an app.” [1] http://www.javaworld.com/article/2078801/java-app-dev/forrester--paas-makes-developers-happy.html [2] http://www.infoworld.com/d/cloud-computing/paas-primer-what-platform-service-and-why-does-it-matter-212696
- 4. I work on a PaaS… “For us, PaaS is a set of services aimed at developers that helps them develop and test apps without having to worry about the underlying infrastructure. Developers don't want to have to worry about provisioning the servers, storage and backup associated with developing and launching an app.” [1] http://www.javaworld.com/article/2078801/java-app-dev/forrester--paas-makes-developers-happy.html [2] http://www.infoworld.com/d/cloud-computing/paas-primer-what-platform-service-and-why-does-it-matter-212696
- 5. Application Instances and Availability Zones Router DEA DEA DEA Cloud Foundry Elastic Runtime DEA DEA DEA Zone 1 Zone 2 App Ops
- 6. Application Instances and Availability Zones Router DEA DEA DEA Cloud Foundry Elastic Runtime DEA DEA DEA Zone 1 Zone 2 Application instances are evenly distributed over two availability zones. App Ops
- 7. Application Instances and Availability Zones Router DEA DEA DEA Cloud Foundry Elastic Runtime DEA DEA DEA Zone 1 Zone 2 Application instances are evenly distributed over two availability zones. Loosing an AZ keeps instances running and available. App Ops
- 8. Router Failed Application Instances Replaced Blobstore Cloud Controller Health Manager Messaging (NATS) DEA DEA DEA App Ops Cloud Foundry Elastic Runtime
- 9. Router Failed Application Instances Replaced Blobstore Cloud Controller Health Manager Actual State Messaging (NATS) DEA DEA DEA App Ops Cloud Foundry Elastic Runtime
- 10. Router Failed Application Instances Replaced Blobstore Cloud Controller Health Manager Actual StateDesired State Messaging (NATS) DEA DEA DEA App Ops Cloud Foundry Elastic Runtime
- 11. Router Failed Application Instances Replaced Blobstore Cloud Controller Health Manager Actual StateDesired State Messaging (NATS) DEA DEA DEA App Ops Cloud Foundry Elastic Runtime
- 12. Router Failed Application Instances Replaced Blobstore Cloud Controller Health Manager Actual StateDesired State Messaging (NATS) DEA DEA DEA App Ops Cloud Foundry Elastic Runtime
- 13. Message Bus ERS Processes are Monitored IaaSCloud Foundry BOSH Health Monitor Health Manager DEA Cloud Controller Responders: pager email monitoring … PaaS Ops
- 14. Message Bus ERS Processes are Monitored IaaSCloud Foundry BOSH Health Monitor Health Manager DEA Cloud Controller Responders: pager email monitoring … PaaS Ops
- 15. Message Bus ERS Processes are Monitored IaaSCloud Foundry BOSH Health Monitor Health Manager DEA Cloud Controller Responders: pager email monitoring … PaaS Ops
- 16. Message Bus VMs are Monitored IaaS Health Monitor Health Manager Cloud Controller DEA Responders: pager email monitoring resurrector … BOSH Director Actual State DEA PaaS Ops Cloud Foundry BOSH
- 17. Message Bus VMs are Monitored IaaS Health Monitor Health Manager Cloud Controller DEA Responders: pager email monitoring resurrector … BOSH Director Actual State DEA PaaS Ops Cloud Foundry BOSH Desired State
- 18. Message Bus VMs are Monitored IaaS Health Monitor Health Manager Cloud Controller Responders: pager email monitoring resurrector … BOSH Director Actual StateDesired State PaaS Ops Cloud Foundry BOSH
- 19. Message Bus VMs are Monitored IaaS Health Monitor Health Manager Cloud Controller Responders: pager email monitoring resurrector … BOSH Director (CPI) Actual StateDesired State DEA PaaS Ops Cloud Foundry BOSH
- 20. Four levels of HA in PCF Elastic Runtime (ERS): Distribution across availability zones Application health management and recovery BOSH (cluster management): Process monitoring, recovery and alerting Virtual machine health monitoring, recovery and alerting
- 21. Too slow for you? How about <28 seconds? http://blog.gopivotal.com/cloud-foundry-pivotal/products/the-four-levels-of-ha-in-pivotal-cf @cdavisafc
- 22. © 2014