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Extensions for Stateful Nodes

Elastigroup’s stateful nodes support Azure extensions and they are installed right after the VM initialization.

Install Extension​

To install extensions on stateful nodes using the Spot console:

  1. In the left main menu, click Elastigroup and then Stateful Nodes.
  2. Select your stateful node and click Edit Node.
  3. Click Next until the Review tab.
  4. Click JSON and move the toggle to Edit mode.

extentions-stateful-azure

Insert the Azure extension to the JSON in the following format:

"extensions": [ 
{ 
"name": "extensionName", 
"type": "customScript", 
"publisher": "Microsoft.Azure.Extensions", 
"apiVersion": "2.0", 
"minorVersionAutoUpgrade": true, 
"publicSettings": { }, 
"protectedSettings": { } 
} 
],

For more details, see the Spot API documentation.

Import VM with Extensions​

During the import process, extensions with protected settings should be reinstalled after the migration to Spot, as these settings were encrypted and stored within the previous VM.
Once the protected settings are set in Spot, each scaling iteration with the new VM will be launched with its protected settings.

When configuring the 'Protected settings' parameter, Spot ensures its complete encryption.