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Adds config per load balancer client. (#1028)

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Client specific configuration goes under `spring.cloud.loadbalancer.clients.<serviceId>.*`. Defaults are set using `spring.cloud.loadbalancer.*`. 

Adds LoadBalancerDefaultMappingsProviderAutoConfiguration to supply the loadbalancer defaults mapping to DefaultsBindHandlerAdvisor

LoadBalancerClientsProperties now extends LoadBalancerProperties. The `clients` attribute is now a field. The `@ConfigurationProperties("spring.cloud.loadbalancer")` has moved from LoadBalancerProperties to LoadBalancerClientsProperties

Fixes gh-914
This commit is contained in:
Spencer Gibb
2021-10-26 16:03:00 -04:00
committed by GitHub
parent 95ce58741d
commit 3a6a9e0a91
28 changed files with 504 additions and 107 deletions
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23
docs/src/main/asciidoc/spring-cloud-commons.adoc
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@@ -468,6 +468,8 @@ For the reactive implementation, you can additionally set:
For the reactive implementation, you can also implement your own `LoadBalancerRetryPolicy` to have more detailed control over the load-balanced call retries.
NOTE: Individual Loadbalancer clients may be configured individually with the same properties as above except the prefix is `spring.cloud.loadbalancer.clients.<clientId>.*` where `clientId` is the name of the loadbalancer.
NOTE: For load-balanced retries, by default, we wrap the `ServiceInstanceListSupplier` bean with `RetryAwareServiceInstanceListSupplier` to select a different instance from the one previously chosen, if available. You can disable this behavior by setting the value of `spring.cloud.loadbalancer.retry.avoidPreviousInstance` to `false`.
====
@@ -1246,6 +1248,27 @@ NOTE: The meters are registered in the registry when at least one record is adde
TIP: You can further configure the behavior of those metrics (for example, add https://micrometer.io/docs/concepts#_histograms_and_percentiles[publishing percentiles and histograms]) by https://docs.spring.io/spring-boot/docs/current/reference/html/production-ready-features.html#production-ready-metrics-per-meter-properties[adding `MeterFilters`].
=== Configuring Individual LoadBalancerClients
Individual Loadbalancer clients may be configured individually with a different prefix `spring.cloud.loadbalancer.clients.<clientId>.*` where `clientId` is the name of the loadbalancer. Default configuration values may be set in the `spring.cloud.loadbalancer.*` namespace and will be merged with the client specific values taking precedence
.application.yml
====
----
spring:
cloud:
loadbalancer:
health-check:
initial-delay: 1s
clients:
myclient:
health-check:
interval: 30s
----
====
The above example will result in a merged health-check `@ConfigurationProperties` object with `initial-delay=1s` and `interval=30s`.
== Spring Cloud Circuit Breaker
include::spring-cloud-circuitbreaker.adoc[leveloffset=+1]