AS Groups Are Associated with an Elastic Load Balancer that Uses Health Check
Rule Details
Parameter |
Description |
---|---|
Rule Name |
as-group-elb-healthcheck-required |
Identifier |
AS Groups Are Associated with an Elastic Load Balancer that Uses Health Check |
Description |
If an AS group is not using Elastic Load Balancing health check, this rule is non-compliant. |
Tag |
as |
Trigger Type |
Configuration change |
Filter Type |
as.scalingGroups |
Rule Parameters |
None |
Application Scenarios
ELB health check determines ECS running status using a load balancing listener. If the AS group uses load balancers, the health check method can also be ELB health check.
If you add multiple load balancers to an AS group, an instance is considered healthy only when all load balancers declare that it is healthy. If any load balancer detects that the instance is unhealthy, the instance will be removed from the AS group. For details, see Auto Scaling Health Check.
You are advised to use this rule only when load balancers are used.
Solution
When you are creating or modifying an AS group, select ELB_AUDIT for the health check.
Rule Logic
- If no health check method is configured for an AS group, the AS group is non-compliant.
- If the health check method configured for an AS group is Nova_Audit, the AS group is non-compliant.
- If the health check method configured for an AS group is ELB_AUDIT, the AS group is compliant.
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