Creating a Shared Load Balancer

Scenarios

You have prepared everything required for creating a load balancer. For details, see Preparations for Creating a Load Balancer.

Load balancers receive requests from clients and route them to backend servers, which answer to these requests over the private network.

Constraints

• After a load balancer is created, the VPC cannot be changed. If you want to change the VPC, create another load balancer and select the VPC during creation.
• To ping the IP address of a load balancer, you need to add a listener and associate a backend server to it.

Procedure

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. Hover on in the upper left corner to display Service List and choose Network > Elastic Load Balance.
4. On the Load Balancers page, click Buy Elastic Load Balancer. Configure the parameters based on Table 1.

   Table 1 Parameters for configuring the basic information

   Parameter	Description	Example Value
   Type	Specifies the type of the load balancer.	Shared
   Region	Specifies the desired region. Resources in different regions cannot communicate with each other over internal networks. For lower network latency and faster access to resources, select the nearest region.	-

5. Configure the network parameters based on Table 2.

   Table 2 Parameters for network configurations

   Parameter	Description	Example Value
   Network Type	Specifies the network type of a load balancer. You can select either of the following: Public IPv4 network: The load balancer routes requests from the clients to backend servers over the Internet. Private IPv4 network: The load balancer routes requests from the clients to backend servers in the same VPC as the load balancer.	Public IPv4 network
   VPC	Specifies the VPC where the load balancer works. Select an existing VPC or create one. For more information about VPC, see the Virtual Private Cloud User Guide.	-
   Frontend Subnet	Specifies the subnet where the load balancer will work.	-
   IPv4 Address	Specifies how you want the IPv4 address to be assigned. Automatically assign IP address: The system automatically assigns an IPv4 address to the load balancer. Manually specify IP address: Manually specify an IPv4 address to the load balancer. NOTE: Network ACL rules configured for the backend subnet of the load balancer will not restrict the traffic from the clients to the load balancer. If network ACL rules are configured, the clients can directly access the load balancer. To control access to the load balancer, configure access control for all listeners added to the load balancer. For details, see Access Control.	Automatically assign IP address
   EIP	Specifies the public IP address that will be bound to the load balancer for receiving and forwarding requests over the Internet. You can use an existing EIP or apply for a new one. New EIP: The system will automatically assign an EIP. Use existing: Select an existing EIP.	New EIP
   EIP Type	Specifies the link type (BGP) when a new EIP is used. Static BGP: When changes occur on a network using static BGP, carriers cannot adjust network configurations in real time to ensure optimal user experience. Dynamic BGP: When changes occur on a network using dynamic BGP, routing protocols provide automatic, real-time optimization of network configurations, ensuring network stability and optimal user experience.	Dynamic BGP
   Billed By	Specifies how the bandwidth will be billed. You can select either of the following: Bandwidth: You specify the maximum bandwidth and pay for the amount of time you use the bandwidth. Traffic: You specify the maximum bandwidth and pay for the total traffic you use.	Bandwidth
   Bandwidth	Specifies the maximum bandwidth when a new EIP is used, in Mbit/s.	10 Mbit/s

6. Configure other parameters about the load balancer as described in Table 3.

   Table 3 Other parameters

   Parameter	Description	Example Value
   Name	Specifies the load balancer name.	elb-test
   Enterprise Project	Selects an enterprise project by which cloud resources and members are centrally managed.	default
   Advanced settings
   Description	Provides supplementary information about the load balancer.	-
   Tag	Identifies load balancers so that they can be easily found. A tag consists of a tag key and a tag value. The tag key marks a tag, and the tag value specifies specific tag content. For details about the naming specifications, see Table 4. A maximum of 10 tags can be added.	Key: elb_key1 Value: elb-01

   Table 4 Tag naming rules

   Parameter	Requirement	Example Value
   Tag key	Cannot be empty. Must be unique for the same load balancer. Can contain a maximum of 36 characters. Only letters, digits, hyphens (-), underscores (_), and Unicode characters from \u4e00 to \u9fff are allowed.	elb_key1
   Value	Can contain a maximum of 43 characters. Only letters, digits, periods (.), hyphens (-), underscores (_), and Unicode characters from \u4e00 to \u9fff are allowed.	elb-01

7. Click Create Now.
8. Confirm the configuration and submit your request.