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• PM document: https://cwiki.apache.org/confluence/display/CLOUDSTACK/Private+Host%2C+Cluster%2C+Pod

Preliminaries

Explicit Dedication: Pods, Clusters  or Hosts can be 1. Explicitly Dedicated Resources: Resources dedicated to an account /domain using APIs (introduced in this FS). We define this as Explicit Dedication

Implicit Dedication: Implicitly dedicated Host is the host having dedicated VMs  of same account. This host is not explicitly dedicated using API.

during configuration time

2. Implicitly Dedicated Resources: Resources which are in common pool that any account can pick during runtime.

3. Shared Resources: All the non-dedicated resources.

4. SO dedication flag: a new Parameter in Service Offering. if ON, Use Implicitly Dedicated Resources

5. DVM dedication flag: a new Parameter in deployVirtualMachine API, if ON, VM is deployed on explicitly dedicated resources Dedicated VM/instance: Dedicated VM is created using Service Offering with "isDedicated" enabled. 

Feature Specifications

Requirements

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• Fail the request if DeployVM dedication Flag is specified and SO has implicit dedication ON
• When you search implicitly dedicated “area” for a host (second table below), if there is already a host for this account, pick it up (instead of finding a new one every time)
• When you delete the last VM from a host in the implicit area, remove the association of the account with the host (i.e. make it implicit-free host as before)
• Table 1:Deploying VM with DeployVM dedication flag

  	DeployVM dedication Flag specified	DeployVM dedication Flag Not specified
  Explicitly Dedicated Resources	Pick from Explicitly dedicated else fail	Pick from shared resources else fail
  NO Explicitly Dedicated Resources	Fail the request	Pick from shared resources else fail

• Table 2: Deploying VM with SO dedication flag

  	SO dedication Flag =  ON	SO dedication Flag =  OFF
  YES - Implicitly Dedicated Resources	Pick from implicit dedicated resources else FAIL	Pick from shared resources else fail
  NO - Implicitly Dedicated Resources	Fail the request	Pick from shared resources else fail

 Logs

1. Ensure proper logs are maintained into vmops.log and api.log

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