VMware VCLOUD SDK FOR JAVA 1.0 - DEVELOPER S GUIDE Manuale Utente Scaricare il pdf (Pagina 42)

Hybrid Cloud Application Architecture

Deployment Guide 40

Appendix A: Orchestration

In our deployment we use a custom application for our orchestration

process. We use Java versions of the vCloud Director API and iControl

libraries and have written specific functions that match our defined business

rules for the application.

Orchestration configuration and main functions

In a hybrid cloud application architecture, an application is already running

in one or more locations, each with a maximum capacity. We define the

cloud bursting action as activating additional resources at a cloud provider

site; increasing the overall number of clients that can access the application.

This section of our workflow triggers resource activation at the cloud

provider site. The requirements for consuming cloud resources have been

met and bootstrapping the application infrastructure in the cloud begin.

1. Read configuration parameters and threshold values. These include:

• vCloud Endpoint in Public Cloud, Public Cloud deployment

details e.g. Organization Name, vDC Name, vApp (Pet Store

application and the vFabric SQLFire Infrastructure).

• BIG-IP LTM Configuration details in Private and Public cloud

(for example, iControl URL, Virtual Server Name and so on).

• Threshold definitions.

2. Periodically call the ReadyToBurst() function to see if the

thresholds have been met. When ReadyToBurst() returns TRUE

perform the cloud bursting action.

3. Perform Cloud Bursting action.

4. Configure newly added vApp node in public cloud with public LTM

Pool.

• Get the IP address of the newly started 'Pet Store' VM.

• Get list of LTM pools in the public cloud and reference

petshop_http pool.

• Add the 'Pet Store' VM as member to the 'petshop_http' pool.

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VMware VCLOUD SDK FOR JAVA 1.0 - DEVELOPER S GUIDE Manuale Utente Pagina 42