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 Netflix 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
eureka.client.eureka-connection-idle-timeout-seconds	`30`	Indicates how much time (in seconds) that the HTTP connections to eureka server can stay idle before it can be closed. In the AWS environment, it is recommended that the values is 30 seconds or less, since the firewall cleans up the connection information after a few mins leaving the connection hanging in limbo.
eureka.client.eureka-server-connect-timeout-seconds	`5`	Indicates how long to wait (in seconds) before a connection to eureka server needs to timeout. Note that the connections in the client are pooled by org.apache.http.client.HttpClient and this setting affects the actual connection creation and also the wait time to get the connection from the pool.
eureka.client.eureka-server-d-n-s-name		Gets the DNS name to be queried to get the list of eureka servers.This information is not required if the contract returns the service urls by implementing serviceUrls. The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.
eureka.client.eureka-server-port		Gets the port to be used to construct the service url to contact eureka server when the list of eureka servers come from the DNS.This information is not required if the contract returns the service urls eurekaServerServiceUrls(String). The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.
eureka.client.eureka-server-read-timeout-seconds	`8`	Indicates how long to wait (in seconds) before a read from eureka server needs to timeout.
eureka.client.eureka-server-total-connections	`200`	Gets the total number of connections that is allowed from eureka client to all eureka servers.
eureka.client.eureka-server-total-connections-per-host	`50`	Gets the total number of connections that is allowed from eureka client to a eureka server host.
eureka.client.eureka-server-u-r-l-context		Gets the URL context to be used to construct the service url to contact eureka server when the list of eureka servers come from the DNS. This information is not required if the contract returns the service urls from eurekaServerServiceUrls. The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.
eureka.client.eureka-service-url-poll-interval-seconds	`0`	Indicates how often(in seconds) to poll for changes to eureka server information. Eureka servers could be added or removed and this setting controls how soon the eureka clients should know about it.
eureka.client.prefer-same-zone-eureka	`true`	Indicates whether or not this instance should try to use the eureka server in the same zone for latency and/or other reason. Ideally eureka clients are configured to talk to servers in the same zone The changes are effective at runtime at the next registry fetch cycle as specified by registryFetchIntervalSeconds
eureka.client.register-with-eureka	`true`	Indicates whether or not this instance should register its information with eureka server for discovery by others. In some cases, you do not want your instances to be discovered whereas you just want do discover other instances.
eureka.server.peer-eureka-nodes-update-interval-ms	`0`
eureka.server.peer-eureka-status-refresh-time-interval-ms	`0`
spring.cloud.loadbalancer.eureka.approximate-zone-from-hostname	`false`	Used to determine whether we should try to get the `zone` value from host name.

eureka.client.eureka-connection-idle-timeout-seconds

30

Indicates how much time (in seconds) that the HTTP connections to eureka server can stay idle before it can be closed. In the AWS environment, it is recommended that the values is 30 seconds or less, since the firewall cleans up the connection information after a few mins leaving the connection hanging in limbo.

eureka.client.eureka-server-connect-timeout-seconds

5

Indicates how long to wait (in seconds) before a connection to eureka server needs to timeout. Note that the connections in the client are pooled by org.apache.http.client.HttpClient and this setting affects the actual connection creation and also the wait time to get the connection from the pool.

eureka.client.eureka-server-d-n-s-name

Gets the DNS name to be queried to get the list of eureka servers.This information is not required if the contract returns the service urls by implementing serviceUrls. The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.

eureka.client.eureka-server-port

Gets the port to be used to construct the service url to contact eureka server when the list of eureka servers come from the DNS.This information is not required if the contract returns the service urls eurekaServerServiceUrls(String). The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.

eureka.client.eureka-server-read-timeout-seconds

8

Indicates how long to wait (in seconds) before a read from eureka server needs to timeout.

eureka.client.eureka-server-total-connections

200

Gets the total number of connections that is allowed from eureka client to all eureka servers.

eureka.client.eureka-server-total-connections-per-host

50

Gets the total number of connections that is allowed from eureka client to a eureka server host.

eureka.client.eureka-server-u-r-l-context

Gets the URL context to be used to construct the service url to contact eureka server when the list of eureka servers come from the DNS. This information is not required if the contract returns the service urls from eurekaServerServiceUrls. The DNS mechanism is used when useDnsForFetchingServiceUrls is set to true and the eureka client expects the DNS to configured a certain way so that it can fetch changing eureka servers dynamically. The changes are effective at runtime.

eureka.client.eureka-service-url-poll-interval-seconds

0

Indicates how often(in seconds) to poll for changes to eureka server information. Eureka servers could be added or removed and this setting controls how soon the eureka clients should know about it.

eureka.client.prefer-same-zone-eureka

true

Indicates whether or not this instance should try to use the eureka server in the same zone for latency and/or other reason. Ideally eureka clients are configured to talk to servers in the same zone The changes are effective at runtime at the next registry fetch cycle as specified by registryFetchIntervalSeconds

eureka.client.register-with-eureka

true

Indicates whether or not this instance should register its information with eureka server for discovery by others. In some cases, you do not want your instances to be discovered whereas you just want do discover other instances.

eureka.server.peer-eureka-nodes-update-interval-ms

0

eureka.server.peer-eureka-status-refresh-time-interval-ms

0

spring.cloud.loadbalancer.eureka.approximate-zone-from-hostname

false

Used to determine whether we should try to get the zone value from host name.