Skip to main content

Common scenarios

HAVIPs support flexible configurations in the following scenarios:

  • Scenario 1: Internal-facing HA services

In the following figure, two ECS instances are associated with the same HAVIP. Keepalived is configured for the ECS instances to provide an internal-facing HA service. Other instances in the same virtual private cloud (VPC) can access the service. The HAVIP serves as the service address. If the primary ECS instance is down, the secondary ECS instance takes over. This improves the availability of your services.

  • Scenario 2: Internet-facing HA services

In the following figure, two ECS instances are associated with the same HAVIP. Keepalived is configured and the HAVIP is associated with an elastic IP address (EIP) for the ECS instances to provide an Internet-facing HA service. The EIP that is associated with the HAVIP serves as the service address. If the primary ECS instance is down, the secondary ECS instance takes over. This improves the availability of your services.