You can use SNAP HA™ to perform Manual Takeovers and Givebacks.

 

 

Setting Up Manual Takeover and Giveback

 

When a takeover is initiated, the SNAP HA™ Controller will ensure that data is not being written to a node in the process of a switch over.  This will avoid the split brain condition.

 

The HA controller will authorize the switch over, reassign the IPs, and change the primary/secondary designation for the SoftNAS instances.  Also, as part of the takeover the problematic instance is shutdown.

 

To perform a manual takeover

 

1. From the Storage Center interface of the good node, navigate to the SnapReplicate™ HA panel.

 

2. Click on Actions>Takeover.  You are prompted to confirm the action.

 

 

3. The takeover process begins.  After the process has completed successfully, the good node will display as the HA Primary.

 

 

 

 

After the problematic node has been fixed, you can bring the node back up.

 

 

Performing the Giveback

 

Once you have restarted the node, you can perform a Giveback from the secondary instance, to allow the SNAP HA™ controller to safely and securely perform the switch over to protect the integrity of your data.

 

To perform the giveback

 

1. From the SoftNAS SnapReplicate™ HA screen, click on Giveback.

 

 

 

2. When you are prompted to confirm the action, click on Yes.