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Port Manager

The port manager is responsible for managing the load-balancer IP-addresses (also called L3-ports).

Tasks

The port manager can do the following tasks:

  • Provisioning new L3-ports
  • Deleting unused L3-ports
  • Returning a list of existing L3-ports
  • Returning the external IP-address of an L3-port
  • Returning the internal IP-address of an L3-port (may be the same as the external address)
  • Checking if a given L3-port exists

Implementations

There are currently two implementations for the port manager. The configuration can be done in the config file of the controller.

Static

A simple implementation that just has a static list of IP-addresses that can be used for load-balancing.

  • Provisioning new L3-ports or deleting unused ones is not possible.
  • The ID of the L3-port is the load-balancer IP-address
  • External and internal IP-addresses are the same (functions just return the given L3-port ID)

OpenStack

A more complex implementation that can be used if the load-balancer gateways are running on OpenStack.

  • Able to create new OpenStack ports with floating-IPs
  • The ID of the L3-port is the OpenStack port ID (UUID)
  • Unused L3-ports can be deleted using the cleanup function
  • The external IP-address is the floating-IP, the internal IP-address is the internal address to which the floating-IP points to