Common application properties

Appendix A: Common application properties

Various properties can be specified inside your application.properties file, inside your application.yml file, or as command line switches. This appendix provides a list of common Spring Cloud Commons properties and references to the underlying classes that consume them.

Property contributions can come from additional jar files on your classpath, so you should not consider this an exhaustive list. Also, you can define your own properties.

Name Default Description

Name	Default	Description
spring.cloud.compatibility-verifier.compatible-boot-versions		Default accepted versions for the Spring Boot dependency. You can set {@code x} for the patch version if you don’t want to specify a concrete value. Example: {@code 3.4.x}
spring.cloud.compatibility-verifier.enabled	`false`	Enables creation of Spring Cloud compatibility verification.
spring.cloud.config.allow-override	`true`	Flag to indicate that {@link #isOverrideSystemProperties() systemPropertiesOverride} can be used. Set to false to prevent users from changing the default accidentally. Default true.
spring.cloud.config.override-none	`false`	Flag to indicate that when {@link #setAllowOverride(boolean) allowOverride} is true, external properties should take lowest priority and should not override any existing property sources (including local config files). Default false.
spring.cloud.config.override-system-properties	`true`	Flag to indicate that the external properties should override system properties. Default true.
spring.cloud.discovery.client.composite-indicator.enabled	`true`	Enables discovery client composite health indicator.
spring.cloud.discovery.client.health-indicator.enabled	`true`
spring.cloud.discovery.client.health-indicator.include-description	`false`
spring.cloud.discovery.client.health-indicator.use-services-query	`true`	Whether or not the indicator should use {@link DiscoveryClient#getServices} to check its health. When set to {@code false} the indicator instead uses the lighter {@link DiscoveryClient#probe()}. This can be helpful in large deployments where the number of services returned makes the operation unnecessarily heavy.
spring.cloud.discovery.client.simple.instances
spring.cloud.discovery.client.simple.order
spring.cloud.discovery.enabled	`true`	Enables discovery client health indicators.
spring.cloud.features.enabled	`true`	Enables the features endpoint.
spring.cloud.httpclientfactories.apache.enabled	`true`	Enables creation of Apache Http Client factory beans.
spring.cloud.httpclientfactories.ok.enabled	`true`	Enables creation of OK Http Client factory beans.
spring.cloud.hypermedia.refresh.fixed-delay	`5000`
spring.cloud.hypermedia.refresh.initial-delay	`10000`
spring.cloud.inetutils.default-hostname	`localhost`	The default hostname. Used in case of errors.
spring.cloud.inetutils.default-ip-address	`127.0.0.1`	The default IP address. Used in case of errors.
spring.cloud.inetutils.ignored-interfaces		List of Java regular expressions for network interfaces that will be ignored.
spring.cloud.inetutils.preferred-networks		List of Java regular expressions for network addresses that will be preferred.
spring.cloud.inetutils.timeout-seconds	`1`	Timeout, in seconds, for calculating hostname.
spring.cloud.inetutils.use-only-site-local-interfaces	`false`	Whether to use only interfaces with site local addresses. See {@link InetAddress#isSiteLocalAddress()} for more details.
spring.cloud.loadbalancer.cache.caffeine.spec		The spec to use to create caches. See CaffeineSpec for more details on the spec format.
spring.cloud.loadbalancer.cache.capacity	`256`	Initial cache capacity expressed as int.
spring.cloud.loadbalancer.cache.enabled	`true`	Enables Spring Cloud LoadBalancer caching mechanism.
spring.cloud.loadbalancer.cache.ttl	`35s`	Time To Live - time counted from writing of the record, after which cache entries are expired, expressed as a {@link Duration}. The property {@link String} has to be in keeping with the appropriate syntax as specified in Spring Boot <code>StringToDurationConverter</code>. @see <a href= "https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/convert/StringToDurationConverter.java">StringToDurationConverter.java</a>
spring.cloud.loadbalancer.health-check.initial-delay	`0`	Initial delay value for the HealthCheck scheduler.
spring.cloud.loadbalancer.health-check.interval	`25s`	Interval for rerunning the HealthCheck scheduler.
spring.cloud.loadbalancer.health-check.path
spring.cloud.loadbalancer.health-check.refetch-instances	`false`	Indicates whether the instances should be refetched by the <code>HealthCheckServiceInstanceListSupplier</code>. This can be used if the instances can be updated and the underlying delegate does not provide an ongoing flux.
spring.cloud.loadbalancer.health-check.refetch-instances-interval	`25s`	Interval for refetching available service instances.
spring.cloud.loadbalancer.health-check.repeat-health-check	`true`	Indicates whether health checks should keep repeating. It might be useful to set it to <code>false</code> if periodically refetching the instances, as every refetch will also trigger a healthcheck.
spring.cloud.loadbalancer.retry.backoff.enabled	`false`	Indicates whether Reactor Retry backoffs should be applied.
spring.cloud.loadbalancer.retry.backoff.jitter	`0.5`	Used to set {@link RetryBackoffSpec#jitter}.
spring.cloud.loadbalancer.retry.backoff.max-backoff		Used to set {@link RetryBackoffSpec#maxBackoff}.
spring.cloud.loadbalancer.retry.backoff.min-backoff	`5ms`	Used to set {@link RetryBackoffSpec#minBackoff}.
spring.cloud.loadbalancer.retry.enabled	`true`
spring.cloud.loadbalancer.retry.max-retries-on-next-service-instance	`1`	Number of retries to be executed on the next <code>ServiceInstance</code>. A <code>ServiceInstance</code> is chosen before each retry call.
spring.cloud.loadbalancer.retry.max-retries-on-same-service-instance	`0`	Number of retries to be executed on the same <code>ServiceInstance</code>.
spring.cloud.loadbalancer.retry.retry-on-all-operations	`false`	Indicates retries should be attempted on operations other than {@link HttpMethod#GET}.
spring.cloud.loadbalancer.retry.retryable-status-codes		A {@link Set} of status codes that should trigger a retry.
spring.cloud.loadbalancer.ribbon.enabled	`true`	Causes `RibbonLoadBalancerClient` to be used by default.
spring.cloud.loadbalancer.service-discovery.timeout		String representation of Duration of the timeout for calls to service discovery.
spring.cloud.loadbalancer.zone		Spring Cloud LoadBalancer zone.
spring.cloud.refresh.enabled	`true`	Enables autoconfiguration for the refresh scope and associated features.
spring.cloud.refresh.extra-refreshable	`true`	Additional class names for beans to post process into refresh scope.
spring.cloud.refresh.never-refreshable	`true`	Comma separated list of class names for beans to never be refreshed or rebound.
spring.cloud.service-registry.auto-registration.enabled	`true`	Whether service auto-registration is enabled. Defaults to true.
spring.cloud.service-registry.auto-registration.fail-fast	`false`	Whether startup fails if there is no AutoServiceRegistration. Defaults to false.
spring.cloud.service-registry.auto-registration.register-management	`true`	Whether to register the management as a service. Defaults to true.
spring.cloud.util.enabled	`true`	Enables creation of Spring Cloud utility beans.

spring.cloud.compatibility-verifier.compatible-boot-versions

Default accepted versions for the Spring Boot dependency. You can set {@code x} for the patch version if you don’t want to specify a concrete value. Example: {@code 3.4.x}

spring.cloud.compatibility-verifier.enabled

false

Enables creation of Spring Cloud compatibility verification.

spring.cloud.config.allow-override

true

Flag to indicate that {@link #isOverrideSystemProperties() systemPropertiesOverride} can be used. Set to false to prevent users from changing the default accidentally. Default true.

spring.cloud.config.override-none

false

Flag to indicate that when {@link #setAllowOverride(boolean) allowOverride} is true, external properties should take lowest priority and should not override any existing property sources (including local config files). Default false.

spring.cloud.config.override-system-properties

true

Flag to indicate that the external properties should override system properties. Default true.

spring.cloud.discovery.client.composite-indicator.enabled

true

Enables discovery client composite health indicator.

spring.cloud.discovery.client.health-indicator.enabled

true

spring.cloud.discovery.client.health-indicator.include-description

false

spring.cloud.discovery.client.health-indicator.use-services-query

true

Whether or not the indicator should use {@link DiscoveryClient#getServices} to check its health. When set to {@code false} the indicator instead uses the lighter {@link DiscoveryClient#probe()}. This can be helpful in large deployments where the number of services returned makes the operation unnecessarily heavy.

spring.cloud.discovery.client.simple.instances

spring.cloud.discovery.client.simple.order

spring.cloud.discovery.enabled

true

Enables discovery client health indicators.

spring.cloud.features.enabled

true

Enables the features endpoint.

spring.cloud.httpclientfactories.apache.enabled

true

Enables creation of Apache Http Client factory beans.

spring.cloud.httpclientfactories.ok.enabled

true

Enables creation of OK Http Client factory beans.

spring.cloud.hypermedia.refresh.fixed-delay

5000

spring.cloud.hypermedia.refresh.initial-delay

10000

spring.cloud.inetutils.default-hostname

localhost

The default hostname. Used in case of errors.

spring.cloud.inetutils.default-ip-address

127.0.0.1

The default IP address. Used in case of errors.

spring.cloud.inetutils.ignored-interfaces

List of Java regular expressions for network interfaces that will be ignored.

spring.cloud.inetutils.preferred-networks

List of Java regular expressions for network addresses that will be preferred.

spring.cloud.inetutils.timeout-seconds

1

Timeout, in seconds, for calculating hostname.

spring.cloud.inetutils.use-only-site-local-interfaces

false

Whether to use only interfaces with site local addresses. See {@link InetAddress#isSiteLocalAddress()} for more details.

spring.cloud.loadbalancer.cache.caffeine.spec

The spec to use to create caches. See CaffeineSpec for more details on the spec format.

spring.cloud.loadbalancer.cache.capacity

256

Initial cache capacity expressed as int.

spring.cloud.loadbalancer.cache.enabled

true

Enables Spring Cloud LoadBalancer caching mechanism.

spring.cloud.loadbalancer.cache.ttl

35s

Time To Live - time counted from writing of the record, after which cache entries are expired, expressed as a {@link Duration}. The property {@link String} has to be in keeping with the appropriate syntax as specified in Spring Boot <code>StringToDurationConverter</code>. @see <a href= "https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/convert/StringToDurationConverter.java">StringToDurationConverter.java</a>

spring.cloud.loadbalancer.health-check.initial-delay

0

Initial delay value for the HealthCheck scheduler.

spring.cloud.loadbalancer.health-check.interval

25s

Interval for rerunning the HealthCheck scheduler.

spring.cloud.loadbalancer.health-check.path

spring.cloud.loadbalancer.health-check.refetch-instances

false

Indicates whether the instances should be refetched by the <code>HealthCheckServiceInstanceListSupplier</code>. This can be used if the instances can be updated and the underlying delegate does not provide an ongoing flux.

spring.cloud.loadbalancer.health-check.refetch-instances-interval

25s

Interval for refetching available service instances.

spring.cloud.loadbalancer.health-check.repeat-health-check

true

Indicates whether health checks should keep repeating. It might be useful to set it to <code>false</code> if periodically refetching the instances, as every refetch will also trigger a healthcheck.

spring.cloud.loadbalancer.retry.backoff.enabled

false

Indicates whether Reactor Retry backoffs should be applied.

spring.cloud.loadbalancer.retry.backoff.jitter

0.5

Used to set {@link RetryBackoffSpec#jitter}.

spring.cloud.loadbalancer.retry.backoff.max-backoff

Used to set {@link RetryBackoffSpec#maxBackoff}.

spring.cloud.loadbalancer.retry.backoff.min-backoff

5ms

Used to set {@link RetryBackoffSpec#minBackoff}.

spring.cloud.loadbalancer.retry.enabled

true

spring.cloud.loadbalancer.retry.max-retries-on-next-service-instance

1

Number of retries to be executed on the next <code>ServiceInstance</code>. A <code>ServiceInstance</code> is chosen before each retry call.

spring.cloud.loadbalancer.retry.max-retries-on-same-service-instance

0

Number of retries to be executed on the same <code>ServiceInstance</code>.

spring.cloud.loadbalancer.retry.retry-on-all-operations

false

Indicates retries should be attempted on operations other than {@link HttpMethod#GET}.

spring.cloud.loadbalancer.retry.retryable-status-codes

A {@link Set} of status codes that should trigger a retry.

spring.cloud.loadbalancer.ribbon.enabled

true

Causes RibbonLoadBalancerClient to be used by default.

spring.cloud.loadbalancer.service-discovery.timeout

String representation of Duration of the timeout for calls to service discovery.

spring.cloud.loadbalancer.zone

Spring Cloud LoadBalancer zone.

spring.cloud.refresh.enabled

true

Enables autoconfiguration for the refresh scope and associated features.

spring.cloud.refresh.extra-refreshable

true

Additional class names for beans to post process into refresh scope.

spring.cloud.refresh.never-refreshable

true

Comma separated list of class names for beans to never be refreshed or rebound.

spring.cloud.service-registry.auto-registration.enabled

true

Whether service auto-registration is enabled. Defaults to true.

spring.cloud.service-registry.auto-registration.fail-fast

false

Whether startup fails if there is no AutoServiceRegistration. Defaults to false.

spring.cloud.service-registry.auto-registration.register-management

true

Whether to register the management as a service. Defaults to true.

spring.cloud.util.enabled

true

Enables creation of Spring Cloud utility beans.