Phenomenon
When your account environment cannot create a machine manually or through AS, or when you delete the associated resources (such as load balancing and private networks) after creation. The failure of a scaling group forms a mechanism for detecting risks in advance, which prevents scaling-out failure when scaling-out is really needed and greatly improves the security and availability of your cluster.
Analysis
You can view the scaling group state in the scaling group list. If your scaling group state shows 
, it means that the scaling group is in Exception state. At this time, the scaling group is unavailable.
Note:
You can hover the mouse pointer over the prompt icon to view the specific cause of the exception.
Exception Causes
- Launch Configuration Exception
- CLB Exception
- VPC Exception
- Insufficient Balance
Troubleshooting
Launch Configuration Exception
Solution: If the launch configuration is invalid, it is because the associated resources (image, snapshot, security group, etc.) of the launch configuration have been deleted.
Processing Method: Click Launch Configuration ID in the row where the scaling group is located, go to the corresponding launch configuration details page, and check whether any resources have been deleted by mistake.
CLB Exception
Processing Method: Click CLB in the row where the scaling group is located, and enter the corresponding CLB details to view the specific situation, including the listener, domain name, and URL path.
VPC Exception
Processing Method: Click Network in the row where the scaling group is located, and enter the corresponding VPC details to view the specific situation, including subnet, routing table, etc.
Impact of Scaling Group Failure
After a scaling group fails, it does not stop working immediately:
- Normal scaling-in activities are not affected.
- The limits on the maximum scaling number, minimum scaling number, and expected number of instances are still working normally.
- The scaling-out activity is no longer performed because your environment no longer meets the conditions for creating a CVM.