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Load Balancing Settings

This reference covers all of Pomerium's Load Balancer Settings:

Load Balancing Policy​

Load Balancing Policy defines the load balancing strategy between multiple upstream servers.

See Envoy documentation for more details.

How to configure​

Some policy types support additional configuration.

Config file keysTypeUsageDefault
lb_policyenumoptionalROUND_ROBIN

Load Balancing Policy options​

Load Balancer Policy options
ROUND_ROBIN
RING_HASH (may be further configured using ring_hash_lb_config option)
LEAST_REQUEST (may be further configured using least_request_lb_config)
RANDOM
MAGLEV (may be further configured using maglev_lb_config option)

Examples​

routes:
  - from: https://myapp.localhost.pomerium.io
    to:
      - http://myapp-srv-1:8080
      - http://myapp-srv-2:8080
      - http://myapp-srv-3:8080
      - http://myapp-srv-4:8080
      - http://myapp-srv-5:8080
    lb_policy: LEAST_REQUEST
    least_request_lb_config:
      choice_count: 2 # current envoy default

Health Checks​

When defined, Health Checks will issue periodic health check requests to upstream servers and unhealthy upstream servers won't serve traffic.

See Envoy's outlier_detection for automatic upstream server health detection. In the presence of multiple upstream servers, it is recommended to set up either health_checks, outlier_detection, or both.

See the Envoy documentation for a list of supported parameters.

How to configure​

Only one of http_health_check, tcp_health_check, or grpc_health_check may be configured per health_check object definition.

See Load Balancing for example configurations.

Config file keysTypeUsage
health_checksarray of objectsoptional