Use health diagnosis to monitor the operational status of scaling groups - Auto Scaling

Auto Scaling health diagnosis checks your scaling group configuration, including whether the specified vSwitches and security groups are valid and whether the instance inventory is sufficient. You can use it to identify and resolve issues that may cause scaling activities to fail.

Background

Auto Scaling health diagnosis checks a scaling group's attributes, billing, and quotas.

Trigger method	Description
Manual	For any scaling group, regardless of whether it is in the Enable or Disable state, you can manually run a health diagnosis to generate a report.
Automatic	For any scaling group in the Enable state, you can configure CloudMonitor event notifications. The system then performs automatic diagnostic checks and sends event notifications when anomalies are detected.

Procedure

Note

Before you run a health diagnosis, make sure that you have created a scaling group. For more information, see Create a scaling group.

Diagnosis items and results

The diagnosis items and results are the same whether you run a health diagnosis manually or automatically.

Category	Diagnosis item type	Parameter	Description	Error code	Details and recommendations
Critical resource anomaly	vSwitch	vSwitch status	Checks whether the specified vSwitch exists.	VSwitchIdNotFound	Details: The vSwitch specified in the scaling group does not exist. Recommendations: Modify the scaling group to use an existing vSwitch.
	SecurityGroup	Security group status	Checks whether the specified security group exists.	SecurityGroupNotFound	Details: The security group specified in the scaling configuration does not exist. Recommendations: Modify the scaling configuration to use an existing security group.
	KeyPair	Key pair status	Checks whether the specified key pair exists.	KeyPairNotFound	Details: The key pair specified in the scaling configuration does not exist. Recommendations: Modify the scaling configuration to use an existing key pair.
Quota diagnosis	SlbBackendServerQuota	Number of instances attached to CLB (formerly SLB) in a scaling group	Checks whether the number of attached ECS or ECI instances in the default server groups and vServer groups of the CLB (formerly SLB) instances exceeds the quota.	SlbBackendServerQuotaExceeded	Details: The number of backend servers attached to the CLB (formerly SLB) instance exceeds the quota. Recommendations: Remove some backend servers from the CLB (formerly SLB) instance or go to Quota Center to request a quota increase.
	AlbBackendServerQuota	Number of instances attached to ALB in a scaling group	Checks whether the number of ECS or ECI instances attached to the server groups of the ALB instances exceeds the quota.	AlbBackendServerQuotaExceeded	Details: The number of backend servers attached to the ALB instance exceeds the quota. Recommendations: Remove some backend servers from the ALB instance or go to Quota Center to request a quota increase.
	NlbBackendServerQuota	Number of instances attached to NLB in a scaling group	Checks whether the number of ECS or ECI instances attached to the server groups of the NLB instances exceeds the quota.	NlbBackendServerQuotaExceeded	Details: The number of backend servers attached to the NLB instance exceeds the quota. Recommendations: Remove some backend servers from the NLB instance or go to Quota Center to request a quota increase.
Billing diagnosis	AccountArrearage	Overdue payment	Checks whether your account has an overdue payment.	AccountArrearage	Details: Your account has an overdue payment. Recommendations: Top up your account before you proceed.
Inventory diagnosis	ElasticStrength	Inventory availability	Checks the inventory availability for the instance types specified in the scaling configuration.	ElasticStrengthAlert	Details: The inventory of the instance types specified in the scaling configuration is low, which may cause scaling activities to fail. Recommendations: Update the scaling group to use a different zone or instance type.