Sahara/ClusterHA

Sumarry

It Shall provided system level HA. So even if a component fails during Hadoop provisioning, the system shall be able to complete the Hadoop provisioning without defect or error.

Release Note

When this is implemented, the system shall be able to complete the Hadoop provisioning without defect or error.

User stories

1. Operator gets the list of failed Cluster through savanna web
2. Operator clicks the resume icon
3. The cluster will be rereated by using this operation.

Implementation

• Scheduler should call the compute manager to rebuild the instance.
• Compute Manager should get a list of dictionaries of network data of an instance.
• Compute Manager should update the volume db and instance db.
• Compute Manager should setup volumes for block device mapping by using the volume manager.
• Compute Manager should spawn the instance by using the virt driver.
• Compute Manager should associate the floating ip by using the network manager.
• Compute Manager should update the instance db.
• Compute Manager should restart the network module.

Test/Demo Plan

This need not be added or completed until the specification is nearing beta. 

Unresolved issues

TBD