SpringCloud Eureka的相关配置_springcloud eureka配置

eureka的属性配置主要有eureka.server、eureka.instance、以及eureka.client。分别对应EurekaServerConfigBean、EurekaInstanceConfigBean以及EurekaClientConfigBean三个配置类。

【1】 eureka server的属性配置

/**
* Eureka server configuration properties prefix.
*/
public static final String PREFIX = "eureka.server";

private static final int MINUTES = 60 * 1000;

@Autowired(required = false)
PropertyResolver propertyResolver;

private String aWSAccessId;

private String aWSSecretKey;

private int eIPBindRebindRetries = 3;

private int eIPBindingRetryIntervalMs = 5 * MINUTES;

private int eIPBindingRetryIntervalMsWhenUnbound = 1 * MINUTES;

private boolean enableSelfPreservation = true;

private double renewalPercentThreshold = 0.85;

private int renewalThresholdUpdateIntervalMs = 15 * MINUTES;

private int peerEurekaNodesUpdateIntervalMs = 10 * MINUTES;

private int numberOfReplicationRetries = 5;

private int peerEurekaStatusRefreshTimeIntervalMs = 30 * 1000;

private int waitTimeInMsWhenSyncEmpty = 5 * MINUTES;

private int peerNodeConnectTimeoutMs = 200;

private int peerNodeReadTimeoutMs = 200;

private int peerNodeTotalConnections = 1000;

private int peerNodeTotalConnectionsPerHost = 500;

private int peerNodeConnectionIdleTimeoutSeconds = 30;

private long retentionTimeInMSInDeltaQueue = 3 * MINUTES;

private long deltaRetentionTimerIntervalInMs = 30 * 1000;

private long evictionIntervalTimerInMs = 60 * 1000;

private int aSGQueryTimeoutMs = 300;

private long aSGUpdateIntervalMs = 5 * MINUTES;

private long aSGCacheExpiryTimeoutMs = 10 * MINUTES; // defaults to longer than the

// asg update interval

private long responseCacheAutoExpirationInSeconds = 180;

private long responseCacheUpdateIntervalMs = 30 * 1000;

private boolean useReadOnlyResponseCache = true;

private boolean disableDelta;

private long maxIdleThreadInMinutesAgeForStatusReplication = 10;

private int minThreadsForStatusReplication = 1;

private int maxThreadsForStatusReplication = 1;

private int maxElementsInStatusReplicationPool = 10000;

private boolean syncWhenTimestampDiffers = true;

private int registrySyncRetries = 0;

private long registrySyncRetryWaitMs = 30 * 1000;

private int maxElementsInPeerReplicationPool = 10000;

private long maxIdleThreadAgeInMinutesForPeerReplication = 15;

private int minThreadsForPeerReplication = 5;

private int maxThreadsForPeerReplication = 20;

private int maxTimeForReplication = 30000;

private boolean primeAwsReplicaConnections = true;

private boolean disableDeltaForRemoteRegions;

private int remoteRegionConnectTimeoutMs = 1000;

private int remoteRegionReadTimeoutMs = 1000;

private int remoteRegionTotalConnections = 1000;

private int remoteRegionTotalConnectionsPerHost = 500;

private int remoteRegionConnectionIdleTimeoutSeconds = 30;

private boolean gZipContentFromRemoteRegion = true;

private Map<String, String> remoteRegionUrlsWithName = new HashMap<>();

private String[] remoteRegionUrls;

private Map<String, Set<String>> remoteRegionAppWhitelist = new HashMap<>();

private int remoteRegionRegistryFetchInterval = 30;

private int remoteRegionFetchThreadPoolSize = 20;

private String remoteRegionTrustStore = "";

private String remoteRegionTrustStorePassword = "changeit";

private boolean disableTransparentFallbackToOtherRegion;

private boolean batchReplication;

private boolean rateLimiterEnabled = false;

private boolean rateLimiterThrottleStandardClients = false;

private Set<String> rateLimiterPrivilegedClients = Collections.emptySet();

private int rateLimiterBurstSize = 10;

private int rateLimiterRegistryFetchAverageRate = 500;

private int rateLimiterFullFetchAverageRate = 100;

private boolean logIdentityHeaders = true;

private String listAutoScalingGroupsRoleName = "ListAutoScalingGroups";

private boolean enableReplicatedRequestCompression = false;

private String jsonCodecName;

private String xmlCodecName;

private int route53BindRebindRetries = 3;

private int route53BindingRetryIntervalMs = 5 * MINUTES;

private long route53DomainTTL = 30;

private AwsBindingStrategy bindingStrategy = AwsBindingStrategy.EIP;

private int minAvailableInstancesForPeerReplication = -1;

private int initialCapacityOfResponseCache = 1000;

private int expectedClientRenewalIntervalSeconds = 30;

private boolean useAwsAsgApi = true;

private String myUrl;
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【2】 eureka.instance的属性配置

private static final String UNKNOWN = "unknown";

	private HostInfo hostInfo;

	private InetUtils inetUtils;

	/**
	 * Default prefix for actuator endpoints.
	 */
	private String actuatorPrefix = "/actuator";

	/**
	 * Get the name of the application to be registered with eureka.
	 */
	private String appname = UNKNOWN;

	/**
	 * Get the name of the application group to be registered with eureka.
	 */
	private String appGroupName;

	/**
	 * Indicates whether the instance should be enabled for taking traffic as soon as it
	 * is registered with eureka. Sometimes the application might need to do some
	 * pre-processing before it is ready to take traffic.
	 */
	private boolean instanceEnabledOnit;

	/**
	 * Get the non-secure port on which the instance should receive traffic.
	 */
	private int nonSecurePort = 80;

	/**
	 * Get the Secure port on which the instance should receive traffic.
	 */
	private int securePort = 443;

	/**
	 * Indicates whether the non-secure port should be enabled for traffic or not.
	 */
	private boolean nonSecurePortEnabled = true;

	/**
	 * Indicates whether the secure port should be enabled for traffic or not.
	 */
	private boolean securePortEnabled;

	/**
	 * Indicates how often (in seconds) the eureka client needs to send heartbeats to
	 * eureka server to indicate that it is still alive. If the heartbeats are not
	 * received for the period specified in leaseExpirationDurationInSeconds, eureka
	 * server will remove the instance from its view, there by disallowing traffic to this
	 * instance.
	 *
	 * Note that the instance could still not take traffic if it implements
	 * HealthCheckCallback and then decides to make itself unavailable.
	 */
	private int leaseRenewalIntervalInSeconds = 30;

	/**
	 * Indicates the time in seconds that the eureka server waits since it received the
	 * last heartbeat before it can remove this instance from its view and there by
	 * disallowing traffic to this instance.
	 *
	 * Setting this value too long could mean that the traffic could be routed to the
	 * instance even though the instance is not alive. Setting this value too small could
	 * mean, the instance may be taken out of traffic because of temporary network
	 * glitches.This value to be set to atleast higher than the value specified in
	 * leaseRenewalIntervalInSeconds.
	 */
	private int leaseExpirationDurationInSeconds = 90;

	/**
	 * Gets the virtual host name defined for this instance.
	 *
	 * This is typically the way other instance would find this instance by using the
	 * virtual host name.Think of this as similar to the fully qualified domain name, that
	 * the users of your services will need to find this instance.
	 */
	private String virtualHostName = UNKNOWN;

	/**
	 * Get the unique Id (within the scope of the appName) of this instance to be
	 * registered with eureka.
	 */
	private String instanceId;

	/**
	 * Gets the secure virtual host name defined for this instance.
	 *
	 * This is typically the way other instance would find this instance by using the
	 * secure virtual host name.Think of this as similar to the fully qualified domain
	 * name, that the users of your services will need to find this instance.
	 */
	private String secureVirtualHostName = UNKNOWN;

	/**
	 * Gets the AWS autoscaling group name associated with this instance. This information
	 * is specifically used in an AWS environment to automatically put an instance out of
	 * service after the instance is launched and it has been disabled for traffic..
	 */
	private String aSGName;

	/**
	 * Gets the metadata name/value pairs associated with this instance. This information
	 * is sent to eureka server and can be used by other instances.
	 */
	private Map<String, String> metadataMap = new HashMap<>();

	/**
	 * Returns the data center this instance is deployed. This information is used to get
	 * some AWS specific instance information if the instance is deployed in AWS.
	 */
	private DataCenterInfo dataCenterInfo = new MyDataCenterInfo(
			DataCenterInfo.Name.MyOwn);

	/**
	 * Get the IPAdress of the instance. This information is for academic purposes only as
	 * the communication from other instances primarily happen using the information
	 * supplied in {@link #getHostName(boolean)}.
	 */
	private String ipAddress;

	/**
	 * Gets the relative status page URL path for this instance. The status page URL is
	 * then constructed out of the hostName and the type of communication - secure or
	 * unsecure as specified in securePort and nonSecurePort.
	 *
	 * It is normally used for informational purposes for other services to find about the
	 * status of this instance. Users can provide a simple HTML indicating what is the
	 * current status of the instance.
	 */
	private String statusPageUrlPath = actuatorPrefix + "/info";

	/**
	 * Gets the absolute status page URL path for this instance. The users can provide the
	 * statusPageUrlPath if the status page resides in the same instance talking to
	 * eureka, else in the cases where the instance is a proxy for some other server,
	 * users can provide the full URL. If the full URL is provided it takes precedence.
	 *
	 * It is normally used for informational purposes for other services to find about the
	 * status of this instance. Users can provide a simple HTML indicating what is the
	 * current status of the instance.
	 */
	private String statusPageUrl;

	/**
	 * Gets the relative home page URL Path for this instance. The home page URL is then
	 * constructed out of the hostName and the type of communication - secure or unsecure.
	 *
	 * It is normally used for informational purposes for other services to use it as a
	 * landing page.
	 */
	private String homePageUrlPath = "/";

	/**
	 * Gets the absolute home page URL for this instance. The users can provide the
	 * homePageUrlPath if the home page resides in the same instance talking to eureka,
	 * else in the cases where the instance is a proxy for some other server, users can
	 * provide the full URL. If the full URL is provided it takes precedence.
	 *
	 * It is normally used for informational purposes for other services to use it as a
	 * landing page. The full URL should follow the format http://${eureka.hostname}:7001/
	 * where the value ${eureka.hostname} is replaced at runtime.
	 */
	private String homePageUrl;

	/**
	 * Gets the relative health check URL path for this instance. The health check page
	 * URL is then constructed out of the hostname and the type of communication - secure
	 * or unsecure as specified in securePort and nonSecurePort.
	 *
	 * It is normally used for making educated decisions based on the health of the
	 * instance - for example, it can be used to determine whether to proceed deployments
	 * to an entire farm or stop the deployments without causing further damage.
	 */
	private String healthCheckUrlPath = actuatorPrefix + "/health";

	/**
	 * Gets the absolute health check page URL for this instance. The users can provide
	 * the healthCheckUrlPath if the health check page resides in the same instance
	 * talking to eureka, else in the cases where the instance is a proxy for some other
	 * server, users can provide the full URL. If the full URL is provided it takes
	 * precedence.
	 *
	 * <p>
	 * It is normally used for making educated decisions based on the health of the
	 * instance - for example, it can be used to determine whether to proceed deployments
	 * to an entire farm or stop the deployments without causing further damage. The full
	 * URL should follow the format http://${eureka.hostname}:7001/ where the value
	 * ${eureka.hostname} is replaced at runtime.
	 */
	private String healthCheckUrl;

	/**
	 * Gets the absolute secure health check page URL for this instance. The users can
	 * provide the secureHealthCheckUrl if the health check page resides in the same
	 * instance talking to eureka, else in the cases where the instance is a proxy for
	 * some other server, users can provide the full URL. If the full URL is provided it
	 * takes precedence.
	 *
	 * <p>
	 * It is normally used for making educated decisions based on the health of the
	 * instance - for example, it can be used to determine whether to proceed deployments
	 * to an entire farm or stop the deployments without causing further damage. The full
	 * URL should follow the format http://${eureka.hostname}:7001/ where the value
	 * ${eureka.hostname} is replaced at runtime.
	 */
	private String secureHealthCheckUrl;

	/**
	 * Get the namespace used to find properties. Ignored in Spring Cloud.
	 */
	private String namespace = "eureka";

	/**
	 * The hostname if it can be determined at configuration time (otherwise it will be
	 * guessed from OS primitives).
	 */
	private String hostname;

	/**
	 * Flag to say that, when guessing a hostname, the IP address of the server should be
	 * used in prference to the hostname reported by the OS.
	 */
	private boolean preferIpAddress = false;

	/**
	 * Initial status to register with remote Eureka server.
	 */
	private InstanceStatus initialStatus = InstanceStatus.UP;

	private String[] defaultAddressResolutionOrder = new String[0];

	private Environment environment;
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【3】 eureka.client的属性配置

/**
* Default prefix for Eureka client config properties.
*/
public static final String PREFIX = "eureka.client";

/**
* Default Eureka URL.
*/
public static final String DEFAULT_URL = "http://localhost:8761" + DEFAULT_PREFIX
+ "/";

/**
* Default availability zone if none is resolved based on region.
*/
public static final String DEFAULT_ZONE = "defaultZone";

private static final int MINUTES = 60;

@Autowired(required = false)
PropertyResolver propertyResolver;

/**
* Flag to indicate that the Eureka client is enabled.
*/
private boolean enabled = true;

@NestedConfigurationProperty
private EurekaTransportConfig transport = new CloudEurekaTransportConfig();

/**
* Indicates how often(in seconds) to fetch the registry information from the eureka
* server.
*/
private int registryFetchIntervalSeconds = 30;

/**
* Indicates how often(in seconds) to replicate instance changes to be replicated to
* the eureka server.
*/
private int instanceInfoReplicationIntervalSeconds = 30;

/**
* Indicates how long initially (in seconds) to replicate instance info to the eureka
* server.
*/
private int initialInstanceInfoReplicationIntervalSeconds = 40;

/**
* 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.
*/
private int eurekaServiceUrlPollIntervalSeconds = 5 * MINUTES;

/**
* Gets the proxy port to eureka server if any.
*/
private String proxyPort;

/**
* Gets the proxy host to eureka server if any.
*/
private String proxyHost;

/**
* Gets the proxy user name if any.
*/
private String proxyUserName;

/**
* Gets the proxy password if any.
*/
private String proxyPassword;

/**
* Indicates how long to wait (in seconds) before a read from eureka server needs to
* timeout.
*/
private int eurekaServerReadTimeoutSeconds = 8;

/**
* 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.
*/
private int eurekaServerConnectTimeoutSeconds = 5;

/**
* Gets the name of the implementation which implements BackupRegistry to fetch the
* registry information as a fall back option for only the first time when the eureka
* client starts.
*
* This may be needed for applications which needs additional resiliency for registry
* information without which it cannot operate.
*/
private String backupRegistryImpl;

/**
* Gets the total number of connections that is allowed from eureka client to all
* eureka servers.
*/
private int eurekaServerTotalConnections = 200;

/**
* Gets the total number of connections that is allowed from eureka client to a eureka
* server host.
*/
private int eurekaServerTotalConnectionsPerHost = 50;

/**
* 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.
*/
private String eurekaServerURLContext;

/**
* 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.
*/
private String eurekaServerPort;

/**
* 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.
*/
private String eurekaServerDNSName;

/**
* Gets the region (used in AWS datacenters) where this instance resides.
*/
private String region = "us-east-1";

/**
* 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.
*/
private int eurekaConnectionIdleTimeoutSeconds = 30;

/**
* Indicates whether the client is only interested in the registry information for a
* single VIP.
*/
private String registryRefreshSingleVipAddress;

/**
* The thread pool size for the heartbeatExecutor to initialise with.
*/
private int heartbeatExecutorThreadPoolSize = 2;

/**
* Heartbeat executor exponential back off related property. It is a maximum
* multiplier value for retry delay, in case where a sequence of timeouts occurred.
*/
private int heartbeatExecutorExponentialBackOffBound = 10;

/**
* The thread pool size for the cacheRefreshExecutor to initialise with.
*/
private int cacheRefreshExecutorThreadPoolSize = 2;

/**
* Cache refresh executor exponential back off related property. It is a maximum
* multiplier value for retry delay, in case where a sequence of timeouts occurred.
*/
private int cacheRefreshExecutorExponentialBackOffBound = 10;

/**
* Map of availability zone to list of fully qualified URLs to communicate with eureka
* server. Each value can be a single URL or a comma separated list of alternative
* locations.
*
* Typically the eureka server URLs carry protocol,host,port,context and version
* information if any. Example:
* https://ec2-256-156-243-129.compute-1.amazonaws.com:7001/eureka/
*
* The changes are effective at runtime at the next service url refresh cycle as
* specified by eurekaServiceUrlPollIntervalSeconds.
*/
private Map<String, String> serviceUrl = new HashMap<>();

{
this.serviceUrl.put(DEFAULT_ZONE, DEFAULT_URL);
}

/**
* Indicates whether the content fetched from eureka server has to be compressed
* whenever it is supported by the server. The registry information from the eureka
* server is compressed for optimum network traffic.
*/
private boolean gZipContent = true;

/**
* Indicates whether the eureka client should use the DNS mechanism to fetch a list of
* eureka servers to talk to. When the DNS name is updated to have additional servers,
* that information is used immediately after the eureka client polls for that
* information as specified in eurekaServiceUrlPollIntervalSeconds.
*
* Alternatively, the service urls can be returned serviceUrls, but the users should
* implement their own mechanism to return the updated list in case of changes.
*
* The changes are effective at runtime.
*/
private boolean useDnsForFetchingServiceUrls = false;

/**
* 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.
*/
private boolean registerWithEureka = 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
*/
private boolean preferSameZoneEureka = true;

/**
* Indicates whether to log differences between the eureka server and the eureka
* client in terms of registry information.
*
* Eureka client tries to retrieve only delta changes from eureka server to minimize
* network traffic. After receiving the deltas, eureka client reconciles the
* information from the server to verify it has not missed out some information.
* Reconciliation failures could happen when the client has had network issues
* communicating to server.If the reconciliation fails, eureka client gets the full
* registry information.
*
* While getting the full registry information, the eureka client can log the
* differences between the client and the server and this setting controls that.
*
* The changes are effective at runtime at the next registry fetch cycle as specified
* by registryFetchIntervalSecondsr
*/
private boolean logDeltaDiff;

/**
* Indicates whether the eureka client should disable fetching of delta and should
* rather resort to getting the full registry information.
*
* Note that the delta fetches can reduce the traffic tremendously, because the rate
* of change with the eureka server is normally much lower than the rate of fetches.
*
* The changes are effective at runtime at the next registry fetch cycle as specified
* by registryFetchIntervalSeconds
*/
private boolean disableDelta;

/**
* Comma separated list of regions for which the eureka registry information will be
* fetched. It is mandatory to define the availability zones for each of these regions
* as returned by availabilityZones. Failing to do so, will result in failure of
* discovery client startup.
*
*/
private String fetchRemoteRegionsRegistry;

/**
* Gets the list of availability zones (used in AWS data centers) for the region in
* which this instance resides.
*
* The changes are effective at runtime at the next registry fetch cycle as specified
* by registryFetchIntervalSeconds.
*/
private Map<String, String> availabilityZones = new HashMap<>();

/**
* Indicates whether to get the applications after filtering the applications for
* instances with only InstanceStatus UP states.
*/
private boolean filterOnlyUpInstances = true;

/**
* Indicates whether this client should fetch eureka registry information from eureka
* server.
*/
private boolean fetchRegistry = true;

/**
* Get a replacement string for Dollar sign <code>$</code> during
* serializing/deserializing information in eureka server.
*/
private String dollarReplacement = "_-";

/**
* Get a replacement string for underscore sign <code>_</code> during serializing/
* deserializing information in eureka server.
*/
private String escapeCharReplacement = "__";

/**
* Indicates whether server can redirect a client request to a backup server/cluster.
* If set to false, the server will handle the request directly, If set to true, it
* may send HTTP redirect to the client, with a new server location.
*/
private boolean allowRedirects = false;

/**
* If set to true, local status updates via ApplicationInfoManager will trigger
* on-demand (but rate limited) register/updates to remote eureka servers.
*/
private boolean onDemandUpdateStatusChange = true;

/**
* This is a transient config and once the latest codecs are stable, can be removed
* (as there will only be one).
*/
private String encoderName;

/**
* This is a transient config and once the latest codecs are stable, can be removed
* (as there will only be one).
*/
private String decoderName;

/**
* EurekaAccept name for client data accept.
*/
private String clientDataAccept = EurekaAccept.full.name();

/**
* Indicates whether the client should explicitly unregister itself from the remote
* server on client shutdown.
*/
private boolean shouldUnregisterOnShutdown = true;

/**
* Indicates whether the client should enforce registration during initialization.
* Defaults to false.
*/
private boolean shouldEnforceRegistrationAtInit = false;

/**
* Order of the discovery client used by `CompositeDiscoveryClient` for sorting
* available clients.
*/
private int order = 0;
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【4】项目参考配置实例(不断完善)

#关闭自我保护
eureka.server.enable-self-preservation=false

eureka.server.eviction-interval-timer-in-ms=6000

#服务过期时间配置,超过这个时间没有接收到心跳EurekaServer就会将这个实例剔除  默认90S
eureka.instance.lease-expiration-duration-in-seconds=30

#发送心跳的间隔时间，默认30S
eureka.instance.lease-renewal-interval-in-seconds=10

#是否作为客户端注册到eureka server被其他服务实例发现 默认true
eureka.client.register-with-eureka=false

#是否从eureka server获取注册信息  默认值true
eureka.client.fetch-registry=false

#连接到eureka server的超时时间 默认5S
eureka.client.eureka-server-connect-timeout-seconds=20

#等待eureka server返回结果的超时时间 默认8S
eureka.client.eureka-server-read-timeout-seconds=20

#到eureka server的连接最大空闲时间 默认30S
eureka.client.eureka-connection-idle-timeout-seconds=30

#多久从eureka获取注册信息 默认30S
eureka.client.registry-fetch-interval-seconds=20

eureka.client.service-url.defaultZone=http://localhost:${server.port}/eureka
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关于eureka.client.healthcheck.enabled，如果设置为true，也就是开启了健康状态监测。这时候你需要添加如下依赖:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
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