• Elastic Load Balancing

elb
  1. Help Center
  2. Elastic Load Balancing
  3. User Guide
  4. Management
  5. Backend ECS (Classic Load Balancer)

Backend ECS (Classic Load Balancer)

Before adding backend ECSs, ensure that the security group containing the ECSs has rules that allow access by 100.125.0.0/16, and specify the health check protocol and port. If a protocol and port are not specified, health checks cannot be conducted for the added ECSs. If UDP is used for health checks, the security group rules must use the ICMP protocol in addition to allowing access from the 100.125.0.0/16 network segment.

To query the protocol and port for the health check, select the listener for which the backend ECSs are to be added, and click View under Health Check. To configure the security group rule, choose Network > Virtual Private Cloud > Security Group. Locate the security group of the target ECSs on the Security Group page and click the security group name to query the rule.

Add Backend ECSs

  1. Log in to the management console.
  2. In the upper left corner of the page, click and select the desired region and project.
  3. Under Network, click Elastic Load Balancing.
  4. Click Classic, locate the target load balancer, and click its name.
  5. Click Listeners, locate the target listener, and click Add Backend ECS in the Operation column.
  6. In the Add Backend ECS dialog box, confirm the subnet, specify the backend port, and select the target backend ECSs from the list. You can filter ECSs by name or private IP address.
  7. Click OK.

View Backend ECSs

  1. Log in to the management console.
  2. In the upper left corner of the page, click and select the desired region and project.
  3. Under Network, click Elastic Load Balancing.
  4. Click Classic, locate the target load balancer, and click its name.
  5. Click Listeners, locate the target listener, and click the number in the Backend ECSs column.

Remove Backend ECSs

  1. Log in to the management console.
  2. In the upper left corner of the page, click and select the desired region and project.
  3. Under Network, click Elastic Load Balancing.
  4. Click Classic, locate the target load balancer, and click its name.
  5. Click Listeners, locate the target listener, and click the number in the Backend ECSs column.
  6. Select and remove the target ECSs.
    • To remove multiple backend ECSs, select the target ECSs and click Remove above the ECS list.
    • To remove a single ECS, locate the row that contains the target ECS and click Remove in the Operation column. Alternatively, select the target ECS and click Remove above the ECS list.
  7. In the Remove Backend ECS dialog box, click Yes.