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Telefonica Background

ELB allows you to control load balancing actions by yourself. A web-based self-service management console is provided to allow you to configure the ELB service with ease and to quickly add services to implement load balancing among service resources.

ELB provides the following functions:

  • Traffic distribution across availability zones (AZs), improving reliability and maintainability
  • Elastic automatic scaling based on traffic demands
  • Linear capacity expansion, eliminating SPOFs
  • Support for public network load balancers, which receive requests from clients over the Internet and route the requests to your ECSs.
  • Support for private network load balancers, which receive requests from clients in your VPC and route the requests to your ECSs in the subnets.
  • Layer 4 and layer 7 load balancing
  • Support for ELB monitoring metrics, such as incoming and outgoing traffic, new requests, concurrent requests, incoming and outgoing data packets, active connections, inactive connections
  • Working with Cloud Eye (CES) to display monitoring metrics and to allow alarm thresholds to be configured
  • Working with AS to implement automatic scaling based on service workload
Category Feature Description
Elastic load balancer management


Creating an elastic load balancer You can create an elastic load balancer in a specified Virtual Private Cloud (VPC) and set the name, description, bandwidth, and type of the load balancer.
Querying an elastic load balancer You can query elastic load balancer attributes, including the name, description, bandwidth, type and VPC.
Modifying an elastic load balancer You can edit elastic load balancer attributes.
Deleting an elastic load balancer You can delete an existing elastic load balancer.
Listener management    Creating a listener You can add a listener to a created elastic load balancer and set the name, description, protocol, port, backend protocol, load balancing algorithm, and sticky session for the listener.
Querying a listener You can query information about a listener, including the name, description, protocol, port, backend protocol, load balancing algorithm, and sticky session.  
Modifying a listener You can edit listener attributes. 
Deleting a listener You can delete an existing listener. 
Member management  Adding a member  You can add a backend ECS to a specified listener, and then the ECS becomes the member of the listener. 
Deleting a member You can delete a backend ECS (member) from a specified listener.
Querying a member You can query the members of a specified listener and the working status of each member.
Health check management Creating a health check task You can configure a health check task for a listener to check the running status of backend ECSs. The settings to be configured include the threshold for determining healthy and unhealthy ECSs, address of the service to be checked, timeout duration, and interval.
Querying a health check task You can query attributes of a health check task configured for a listener. The attributes include the threshold for determining healthy and unhealthy ECSs, address of the service to be checked, timeout duration, and interval.