Advanced Guide

This section will introduce some advanced configuration items related to traffic governance.

Configuration Refrence

Configuration Item	key	Default Value	Description
Load balancing algorithm used for label routing	spring.cloud.governance.routing.rule	ZoneAvoidanceRule	The algorithm can take the following values: 1.RoundRobinRule 2.RandomRule 3.WeightedResponseTimeRule 4.BestAvailableRule 5.RetryRule 6.ZoneAvoidanceRule 7.AvailabilityFilteringRule
Host of Istiod	spring.cloud.istio.config.host	127.0.0.1
Port of Istiod	spring.cloud.istio.config.port	15012	15010 port does not need TLS，but 15012 does
Thread pool size for application to pull the config	spring.cloud.istio.config.polling-pool-size	10
Time interval for application to pull the config	spring.cloud.istio.config.polling-time	30	The unit is second
JWT token for application to connect to 15012 port	spring.cloud.istio.config.istiod-token	Content of file /var/run/secrets/tokens/istio-token in the pod of application
Whether to print logs about xDS	spring.cloud.istio.config.log-xds	true

Environment Variable Refrence

Note that the application runs in the K8s environment, and the application in the non-default namespace needs to receive the rules issued by Istiod, and needs to inject the meta information of the running application Kubernetes into the following environment variables. For the specific operation method, please refer to Kubernetes documentation:

Environment variable name	K8s pod metadata name
POD_NAME	metadata.name
NAMESPACE_NAME	metadata.namespace