Algorithms¶

List load balancing algorithms

All load balancers utilize an algorithm that defines how traffic should be directed between back-end nodes. The default algorithm for newly created load balancers is RANDOM, which can be overridden at creation time or changed after the load balancer has been initially provisioned. The algorithm name is to be constant within a major revision of the load balancing API, though new algorithms may be created with a unique algorithm name within a given major revision of the service API.

Table. Load balancing algorithms

Name	Description
`LEAST_CONNECTIONS`	The node with the lowest number of connections receives requests.
`RANDOM`	Back-end servers are selected at random.
`ROUND_ROBIN`	Connections are routed to each of the back-end servers in turn.
`WEIGHTED_LEAST_CONNECTIONS`	Each request is assigned to a node based on the number of concurrent connections to the node and its weight.
`WEIGHTED_ROUND_ROBIN`	A round robin algorithm, but with different proportions of traffic beingdirected to the back-end nodes. Weights must be defined as part of the load balancer’s node configuration.

List load balancing algorithms ¶

GET /v1.0/{account}/loadbalancers/algorithms

Lists all supported load balancing algorithms.

The following table shows the possible response codes for this operation:

Response Code	Name	Description
200	Success	Request succeeded.
400	Bad Request	The request is missing one or more elements, or the values of some elements are invalid.
401	Unauthorized	You are not authorized to complete this operation. This error can occur if the request is submitted with an invalid authentication token.
404	Not Found	The requested item was not found.
413	Over Limit	The number of items returned is above the allowed limit.
422	ImmutableEntity	This fault is returned when a user attempts to modify an item that is not currently in a state that allows modification. For example, load balancers in a status of PENDING_UPDATE,BUILD, or DELETED may not be modified.
500	Load Balancer Fault	The load balancer has experienced a fault.
503	Service Unavailable	The service is not available.

Request¶

The following table shows the URI parameters for the request:

Name	Type	Description
{account}	String	The ID for the tenant or account in a multi- tenancy cloud.

This operation does not accept a request body.

Response¶

Example List load balancing algorithms: JSON response

{"algorithms": [
        {
            "name": "LEAST_CONNECTIONS"
        },
        {
            "name": "RANDOM"
        },
        {
            "name": "ROUND_ROBIN"
        },
        {
            "name": "WEIGHTED_LEAST_CONNECTIONS"
        },
        {
            "name": "WEIGHTED_ROUND_ROBIN"
        }
    ]
}

Example List load balancing algorithms: XML response

<algorithms xmlns="http://docs.openstack.org/loadbalancers/api/v1.0">
    <algorithm name="LEAST_CONNECTIONS" />
    <algorithm name="RANDOM" />
    <algorithm name="ROUND_ROBIN" />
    <algorithm name="WEIGHTED_LEAST_CONNECTIONS" />
    <algorithm name="WEIGHTED_ROUND_ROBIN" />
</algorithms>

Algorithms¶

List load balancing algorithms¶

Request¶

Response¶

List load balancing algorithms ¶