The following sections briefly describe some of the common deployment scenarios that are addressed by ESC.
Cisco Elastic Services Controller can be installed in different modes as per the requirement. These different modes are configured during installation. The following sections briefly describe some of the common deployment scenarios that are addressed by ESC.
In the standalone scenario, a single active VM is deployed for ESC.
ESC with HA
ESC supports High Availability (HA) in the form of Active/Standby and Active/Active models. For Active/Standby model, two ESC instances are deployed in the network to prevent ESC failure and to provide ESC service with minimum interruption. If the primary ESC instance fails, the standby instance automatically takes over the ESC services. ESC HA resolves the following single point failures of ESC:
Dead VM instance
Internal application failures
From ESC 5.0, the name, Active/Passive model is changed to Active/Standby model.
For more information on deploying ESC HA Active/Standby, see 'Configuring High-Availability Active/Standby' in Installing ESC on OpenStack and Installing ESC on VMware chapters.
For more information on the Active/Active model, see ESC HA Active/Active Overview Chapter.