Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, 
      see Getting Started with Amazon Web Services in China
         (PDF). 
    Update the health check settings of an Application Load Balancer
                target group
You can update the health check settings for your target group at any time. 
            For the list of health check settings, see Health check settings.
            - Console
 - 
                    
To update the health check settings
Open the Amazon EC2 console at
         https://console.amazonaws.cn/ec2/.
- 
                            
On the navigation pane, under Load Balancing,
                                choose Target Groups.
                         - 
                            
Choose the name of the target group to open its details
                                page.
                         - 
                            
On the Health checks tab, choose
                                Edit.
                         - 
                            
On the Edit health check settings page,
                                modify the settings as needed.
                         - 
                            
Choose Save changes.
                         
 
                 
            - Amazon CLI
 - 
                     
                        
To update the health check settings
                        Use the modify-target-group command. The following example
                            updates the HealthyThresholdCount and 
                            HealthCheckTimeoutSeconds settings.
                     
                    aws elbv2 modify-target-group \
    --target-group-arn target-group-arn \
    --healthy-threshold-count 3 \
    --health-check-timeout-seconds 20
                 
            - CloudFormation
 - 
                     
                        
To update the health check settings
                        Update the AWS::ElasticLoadBalancingV2::TargetGroup resource
                            to include the updated health check settings. The following example
                            updates the HealthyThresholdCount and 
                            HealthCheckTimeoutSeconds settings.
                     
                    Resources:
  myTargetGroup:
    Type: 'AWS::ElasticLoadBalancingV2::TargetGroup'
    Properties:
      Name: my-target-group
      Protocol: HTTP
      Port: 80
      TargetType: instance
      VpcId: !Ref myVPC
      HealthyThresholdCount: 3
      HealthCheckTimeoutSeconds: 20