介绍

SpringCloud是一个完整的微服务治理框架，包括服务发现和注册，服务网关，熔断，限流，负载均衡和链路跟踪等组件。

SpringCloud-Eureka主要提供服务注册和发现功能。本文提供了该组件配置的全面说明。

术语和概念

• Eureka服务端：负责服务注册、发现并管理每项服务的中心
• Eureka实例：服务（如订单系统）部署多个服务器，每个服务器上提供的服务都是实例。
• Eureka服务：指提供特定服务功能的服务，例如：订单系统，同一服务可以提供多个实例;
• Eureka客户端：主要向服务中心注册自己成为服务。但它既可以是服务提供者，也可以是消费者。它与Eureka实例感觉相似，但实际上意义不同。

配置说明

Eureka服务器配置

1.  
   ################server Configuration associated with client####################33
2.  
   # Open self-protection mode. No matter what the situation, the server will maintain a certain number of services. Avoid network problems between client and server, and a large number of services are cleared.
3.  
   eureka.server.enable-self-preservation=

   true
4.  
   # Enable the timed task to clear invalid services. Default 1 minute
5.  
   eureka.server.eviction-interval-timer-in-ms= 60000
6.  
   # How long, clear expired delta data
7.  
   eureka.server.delta-retention-timer-interval-in-ms=0
8.  
   # , is it also available to the client?
9.  
   eureka.server.disable-delta=

   false
10.  
    #eureka Whether the server records the identity of the client header
11.  
    eureka.server.log-identity-headers=

    true
12.  
    #Request frequency limiter
13.  
    eureka.server.rate-limiter-burst-size=10
14.  
    # Whether to enable the request frequency limiter
15.  
    eureka.server.rate-limiter-enabled=

    false
16.  
    #Request frequency average
17.  
    eureka.server.rate-limiter-full-fetch-average-rate=100
18.  
    # Whether to limit the frequency request to the standard client. If false, only limit non-standard clients
19.  
    eureka.server.rate-limiter-throttle-standard-clients=

    false
20.  
    #Register service, average value of request frequency for pulling service list data
21.  
    eureka.server.rate-limiter-registry-fetch-average-rate=500
22.  
    #Set the trusted client list
23.  
    eureka.server.rate-limiter-privileged-clients=
24.  
    # In the set time range class, the percentage expected to be renewed with the client.
25.  
    eureka.server.renewal-percent-threshold=0.85
26.  
    #How long to update the renewal threshold
27.  
    eureka.server.renewal-threshold-update-interval-ms=0
28.  
    #How long does it take for cached registration data to expire?
29.  
    eureka.server.response-cache-auto-expiration-in-seconds=180
30.  
    #How long to update the service registration data in the cache
31.  
    eureka.server.response-cache-update-interval-ms=0
32.  
    #Cache the time of the incremental data so that no information is lost when searching
33.  
    eureka.server.retention-time-in-m

    -s-in-delta-queue=0
34.  
    #When the timestamps are inconsistent, whether to synchronize
35.  
    eureka.server.sync-when-timestamp-differs=

    true
36.  
    # Whether to adopt a read-only cache policy, the read-only policy does not expire for cached data.
37.  
    eureka.server.use-read-only-response-cache=

    true
38.  
     
39.  
    ################server Customized Implementation Configuration####################33
40.  
    #json's implementation class name for conversion
41.  
    eureka.server.json-codec-name=
42.  
    #PropertyResolver
43.  
    eureka.server.property-resolver=
44.  
    #eureka server xml codec implementation name
45.  
    eureka.server.xml-codec-name=
46.  
     
47.  
    ################Association between server node and node####################33
48.  
    # replication data is in the request, always compressed
49.  
    eureka.server.enable-replicated-request-compression=

    false
50.  
    # Indicates whether replication between cluster nodes should be batched to improve network efficiency.
51.  
    eureka.server.batch-replication=

    false
52.  
    #Allow the maximum number of replication events that are backed up to the backup pool. This backup pool is responsible for other events except status updates. This value can be set according to memory size, timeout and replication traffic.
53.  
    eureka.server.max-elements-in-peer-replication-pool=10000
54.  
    #Allow the maximum number of replication events that are backed up to the stateful backup pool
55.  
    eureka.server.max-elements-in-status-replication-pool=10000
56.  
    #Multiple service centers synchronize the maximum idle time of information threads with each other
57.  
    eureka.server.max-idle-thread-age-in-minutes-for-peer-replication=15
58.  
    #Status synchronization thread maximum idle time
59.  
    eureka.server.max-idle-thread-in-minutes-age-for-status-replication=15
60.  
    #Service registry each instance of the maximum number of threads to copy data to each other
61.  
    eureka.server.max-threads-for-peer-replication=20
62.  
    #Service registry each instance of the maximum number of threads copying state data
63.  
    eureka.server.max-threads-for-status-replication=1
64.  
    Communication time between

    #instance and data replication
65.  
    eureka.server.max-time-for-replication=30000
66.  
    # The minimum number of normal peer-to-peer services. -1 indicates that the service center is a single node.
67.  
    eureka.server.min-available-instances-for-peer-replication=-1
68.  
    The minimum number of threads opened between

    #instance and mutual replication
69.  
    eureka.server.min-threads-for-peer-replication=5
70.  
    Between

    #instance for state replication, the minimum number of threads opened
71.  
    eureka.server.min-threads-for-status-replication=1
72.  
    Number of

    times that can be retried when copying data between

    #instance
73.  
    eureka.server.number-of-replication-retries=5
74.  
    #eureka How often to update data between nodes. The default is 10 minutes.
75.  
    eureka.server.peer-eureka-nodes-update-interval-ms=600000
76.  
    #eureka The time interval between service status updates.
77.  
    eureka.server.peer-eureka-status-refresh-time-interval-ms=0
78.  
    #eureka Peer-to-peer connection timeout
79.  
    eureka.server.peer-node-connect-timeout-ms=200
80.  
    #eureka idle time after peer node connection
81.  
    eureka.server.peer-node-connection-idle-timeout-seconds=30
82.  
    #Read data connection timeout between nodes
83.  
    eureka.server.peer-node-read-timeout-ms=200
84.  
    #eureka server Total number of connections between nodes
85.  
    eureka.server.peer-node-total-connections=1000
86.  
    #eureka server Maximum number of single machines connected between nodes
87.  
    eureka.server.peer-node-total-connections-per-host=10
88.  
    #The number of times eureka tried to obtain registration information when the service node was started
89.  
    eureka.server.registry-sync-retries=
90.  
    # When eureka tries to obtain registration information multiple times when the service node starts up
91.  
    eureka.server.registry-sync-retry-wait-ms=
92.  
    # When the eureka server is started, you cannot wait for the instance registration information from the peer node. How long should it wait?
93.  
    eureka.server.wait-time-in-ms-when-sync-empty=0
94.  
     
95.  
    ################server Configuration associated with remote####################33
96.  
    # , is it also provided to the remote region?
97.  
    eureka.server.disable-delta-for-remote-regions=

    false
98.  
    #Old behavior of the application that is rolled back to the remote zone (if configured) If there is no instance of the application in the local zone, it will be disabled.
99.  
    eureka.server.disable-transparent-fallback-to-other-region=

    false
100.  
     # Indicates whether the content obtained from the Eureka server must be compressed for the remote zone if the server supports it.
101.  
     eureka.server.g-zip-content-from-remote-region=

     true
102.  
     #Connection eureka remote note connection timeout
103.  
     eureka.server.remote-region-connect-timeout-ms=1000
104.  
     #remote region Application whitelist
105.  
     eureka.server.remote-region-app-whitelist.
106.  
     #Connect eureka remote note connection idle time
107.  
     eureka.server.remote-region-connection-idle-timeout-seconds=30
108.  
     #Executing remote region The request thread pool size for obtaining registration information
109.  
     eureka.server.remote-region-fetch-thread-pool-size=20
110.  
     #remote region Timeout from reading data from peer eureka
111.  
     eureka.server.remote-region-read-timeout-ms=1000
112.  
     #Time interval for obtaining registration information from remote region
113.  
     eureka.server.remote-region-registry-fetch-interval=30
114.  
     #remote region The total number of connections connecting eureka nodes
115.  
     eureka.server.remote-region-total-connections=1000
116.  
     #remote region The number of stand-alone connections connecting eureka nodes
117.  
     eureka.server.remote-region-total-connections-per-host=50
118.  
     #remote region fetches the storage file of the registration information, and this reliable storage file needs a fully qualified name to specify
119.  
     eureka.server.remote-region-trust-store=
120.  
     #remote region Password of the stored file
121.  
     eureka.server.remote-region-trust-store-password=
122.  
     #remote region url. separated by multiple commas
123.  
     eureka.server.remote-region-urls=
124.  
     #remote region url. separated by multiple commas
125.  
     eureka.server.remote-region-urls-with-name.
126.  
      
127.  
     ################server Configuration associated with ASG/AWS/EIP/route52################### #33
128.  
     #Cache the expiration time of ASG information.
129.  
     eureka.server.a

     -s-g-cache-expiry-timeout-ms=0
130.  
     #Query the timeout time of ASG information.
131.  
     eureka.server.a

     -s-g-query-timeout-ms=300
132.  
     #Service update ASG information frequency
133.  
     eureka.server.a

     -s-g-update-interval-ms=0
134.  
     #AWSAccess ID
135.  
     eureka.server.a-w

     -s-access-id=
136.  
     #AWSSecurity Key
137.  
     eureka.server.a-w

     -s-secret-key=
138.  
     #AWSbinding strategy
139.  
     eureka.server.binding-strategy=eip
140.  
     #Use the name of the role that automatically extends the grouping from a third-party AWS account description.
141.  
     eureka.server.list-auto-scaling-groups-role-name=
142.  
     #Whether should establish a connection guide
143.  
     eureka.server.prime-aws-replica-connections=

     true
144.  
     #Number of times the server tries to bind candidate EIPs
145.  
     eureka.server.e-i-p-bind-rebind-retries=3
146.  
     # The time interval at which the server binds the EIP. If the binding is checked, it is re-bound if the binding fails. If and only if it is already bound
147.  
     eureka.server.e-i-p-binding-retry-interval-ms=10
148.  
     #Time interval at which the server binds EIP. If and only if the service is bound
149.  
     eureka.server.e-i-p-binding-retry-interval-ms-when-unbound=
150.  
     #The number of times the server tries to bind route53
151.  
     eureka.server.route53-bind-rebind-retries=3
152.  
     #Servlet interval how long to try to bind route53
153.  
     eureka.server.route53-binding-retry-interval-ms=30
154.  
     #
155.  
     eureka.server.route53-domain-t-t

     -l=10

Eureka Instacen配置

1.  
   #Hostname

   of the service registry instance
2.  
   eureka.instance.hostname=localhost
3.  
   #

   Register the application group

   name

   in the Eureka service
4.  
   eureka.instance.app-group-

   name=
5.  
   #

   Register the application

   name

   in the Eureka service
6.  
   eureka.instance.appname=
7.  
   # Unique ID

   of the instance registered

   to the service center
8.  
   eureka.instance.instance-id=
9.  
   #IP address

   of the instance
10.  
    eureka.instance.ip-address=
11.  
    #Instance, whether IP

    is preferred over hostname
12.  
    eureka.instance.prefer-ip-address=false
13.  
     
14.  
    #Group

    name associated

    with this instance

    for automatic extension

    of the AWS

    platform,
15.  
    eureka.instance.a-s-g-

    name=
16.  
    #Deploy the data center

    for this instance
17.  
    eureka.instance.data-center-info=
18.  
    #

    Default address resolution order
19.  
    eureka.instance.

    default-address-resolution-order=
20.  
    #Instance environment configuration
21.  
    eureka.instance.environment=
22.  
    #Initialize the instance

    and

    register

    to the initial state

    of the service center
23.  
    eureka.instance.initial-status=up
24.  
    # Indicate whether

    as long

    as this instance

    is registered

    to the service center, immediately communicate
25.  
    eureka.instance.instance-enabled-onit=false
26.  
    #The namespace

    of the service instance

    for finding attributes
27.  
    eureka.instance.namespace=eureka
28.  
    #The child definition metadata

    of the service instance can be accepted by the service center.
29.  
    eureka.instance.metadata-map.test = test
30.  
     
31.  
    #Service center deletes the waiting time (

    in seconds)

    of this service instance,

    and the time interval

    is the heartbeat time received by the last service center.
32.  
    eureka.instance.lease-expiration-duration-

    in-seconds=

    90
33.  
    # The interval at which the instance sends a heartbeat

    to the service center

    to indicate that the service instance

    is available.
34.  
    eureka.instance.lease-renewal-interval-

    in-seconds=

    30
35.  
    #Instance, registration service center, the number

    of communication opened by

    default
36.  
    eureka.instance.registry.

    default-open-

    for-traffic-count=

    1
37.  
    #Number

    of renewals per minute
38.  
    eureka.instance.registry.expected-number-

    of-renews-per-min=

    1
39.  
     
40.  
    #Instance health check url,

    absolute path
41.  
    eureka.instance.health-check-url=
42.  
    #Instance health check url, relative path
43.  
    eureka.instance.health-check-url-path=/health
44.  
    #Instance

    's home page url, absolute path
45.  
    eureka.instance.home-page-url=
46.  
    #Instance's home page url, relative path
47.  
    eureka.instance.home-page-url-path=/
48.  
    #Instance security health check url,

    absolute path
49.  
    eureka.instance.secure-health-check-url=
50.  
    #https
51.  
    eureka.instance.secure-port=

    443
52.  
    #httpsCommunication port

    is enabled
53.  
    eureka.instance.secure-port-enabled=false
54.  
    #http
55.  
    eureka.instance.non-secure-port=

    80
56.  
    #httpCommunication port

    is enabled
57.  
    eureka.instance.non-secure-port-enabled=true
58.  
    #Security

    virtual host

    name (https)

    for this instance
59.  
    eureka.instance.secure-

    virtual-host-

    name=unknown
60.  
    #

    Virtual host

    name

    of this instance (http)
61.  
    eureka.instance.

    virtual-host-

    name=unknown
62.  
    #The status

    of the instance

    is rendered url,

    absolute path
63.  
    eureka.instance.status-page-url=
64.  
    #The status

    of the instance

    is rendered url, relative path
65.  
    eureka.instance.status-page-url-path=/status

Eureka客户端配置

1.  
   #This client is available
2.  
   eureka.client.enabled=

   true
3.  
   #Instance Whether to register your own information on the eureka server for other services to discover, the default is true
4.  
   eureka.client.register-with-eureka=

   false
5.  
   #This client gets the registration information on the eureka server registry, the default is true
6.  
   eureka.client.fetch-registry=

   false
7.  
   # Whether to filter out, non-UP instances. Default is true
8.  
   eureka.client.filter-only-up-instances=

   true
9.  
   # zone and url address with Eureka Registration Service Center
10.  
    eureka.client.serviceUrl.defaultZone=http://

    ${eureka.instance.hostname}:

    ${server.port}/eureka/
11.  
     
12.  
    #client is the idle waiting time after connecting to the Eureka server. The default is 30 seconds.
13.  
    eureka.client.eureka-connection-idle-timeout-seconds=30
14.  
    #client connects to eureka server connection timeout, the default is 5 seconds
15.  
    eureka.client.eureka-server-connect-timeout-seconds=5
16.  
    #clientRead timeout for the server
17.  
    eureka.client.eureka-server-read-timeout-seconds=8
18.  
    #clientConnection all eureka server total number of connections, the default 200
19.  
    eureka.client.eureka-server-total-connections=200
20.  
    #clientConnect to the number of single-machine connections on the eureka server. The default is 50.
21.  
    eureka.client.eureka-server-total-connections-per-host=50
22.  
    #Executive index rollback refresh related attribute, which is the maximum multiple of the retry delay, the default is 10
23.  
    eureka.client.cache-refresh-executor-exponential-back-off-bound=10
24.  
    #Execution program cache refresh thread pool size, the default is 5
25.  
    eureka.client.cache-refresh-executor-thread-pool-size=2
26.  
    # Execution program rollback related attributes, which is the maximum multiple of the retry delay. The default is 10
27.  
    eureka.client.heartbeat-executor-exponential-back-off-bound=10
28.  
    # Execution program thread pool size, the default is 5
29.  
    eureka.client.heartbeat-executor-thread-pool-size=5
30.  
    # Ask the frequency (s) of the Eureka service url information change, the default is 300 seconds
31.  
    eureka.client.eureka-service-url-poll-interval-seconds=300
32.  
    #The time (s) required to initially copy the instance information to the eureka server. The default is 40 seconds.
33.  
    eureka.client.initial-instance-info-replication-interval-seconds=40
34.  
    #How long does it take to copy the instance information to the eureka server again, the default is 30 seconds?
35.  
    eureka.client.instance-info-replication-interval-seconds=30
36.  
    #Time interval (s) from the eureka server registry to obtain registration information, the default is 30 seconds
37.  
    eureka.client.registry-fetch-interval-seconds=30
38.  
     
39.  
    # Get the region where the instance is located. The default is us-east-1
40.  
    eureka.client.region=us-east-1
41.  
    #Instance Whether to use the eureka server in the same zone, the default is true. Ideally, the eureka client and server are in the same zone.
42.  
    eureka.client.prefer-same-zone-eureka=

    true
43.  
    # Get a list of available areas in the region where the instance is located, separated by commas. (AWS)
44.  
    eureka.client.availability-zones.china=defaultZone,defaultZone1,defaultZone2
45.  
    The list of comma-separated regions

    in the

    #eureka service registry information. If you do not return these regions, the client will start up with errors. The default is null
46.  
    eureka.client.fetch-remote-regions-registry=
47.  
    #Server is able to redirect client requests to the backup server. If set to false, the server will process the request directly, and if set to true, it may send an HTTP redirect to the client. Default is false
48.  
    eureka.client.allow-redirects=

    false
49.  
    #
50.  
    eureka.client.client-data-accept=
51.  
    #Incremental information can be provided to the client, the default is false
52.  
    eureka.client.disable-delta=

    false
53.  
    The

    #eureka server serialization/deserialization information obtains the replacement string of the "_" symbol. The default is"__"
54.  
    eureka.client.escape-char-replacement=__
55.  
    The

    #eureka server serialization/deserialization information obtains a replacement string for the "$" symbol. The default is"_-"
56.  
    eureka.client.dollar-replacement=

    "_-"
57.  
    #When the server supports compression, whether to support the information obtained from the server for compression. Default is true
58.  
    eureka.client.g-zip-content=

    true
59.  
    # Whether to record the difference between the information in the registry between the eureka server and the client, the default is false
60.  
    eureka.client.log-delta-diff=

    false
61.  
    # If set to true, the client's status update will be updated on-demand to the remote server. The default is true.
62.  
    eureka.client.on-demand-update-status-change=

    true
63.  
    #This client is only interested in information about a single VIP registry. The default is null
64.  
    eureka.client.registry-refresh-single-vip-address=
65.  
    #client is forced to register to the service center during the initialization phase, the default is false
66.  
    eureka.client.should-enforce-registration-at-init=

    false
67.  
    #clientWhen the shutdown is displayed, the logout service is displayed from the service center. The default is true.
68.  
    eureka.client.should-unregister-on-shutdown=

    true
69.  
     
70.  
    # Get the proxy host of the eureka service, the default is null
71.  
    eureka.client.proxy-host=
72.  
    #Get the proxy password of the eureka service, the default is null
73.  
    eureka.client.proxy-password=
74.  
    # Get the proxy port of the eureka service, the default is null
75.  
    eureka.client.proxy-port=
76.  
    # Get the proxy username of the eureka service, the default is null
77.  
    eureka.client.proxy-user-name=
78.  
     
79.  
    #Attribute interpreter
80.  
    eureka.client.property-resolver=
81.  
    #Get the implementation name of the fallback option when the eureka client reads the registry at the first startup.
82.  
    eureka.client.backup-registry-impl=
83.  
    # ×××Configuration, if the latest XXX is stable, it can be removed, the default is null
84.  
    eureka.client.decoder-name=
85.  
    # , if the latest encoder is stable, it can be removed, the default is null
86.  
    eureka.client.encoder-name=
87.  
     
88.  
    # Whether to use the DNS mechanism to get a list of services and then communicate. Default is false
89.  
    eureka.client.use-dns-for-fetching-service-urls=

    false
90.  
    #Get the DNS name to be queried to get the eureka server. This configuration is only used when the eureka server ip address list is in the DNS. The default is null
91.  
    eureka.client.eureka-server

    -d-n

    -s-name=
92.  
    #Get the port of the eureka server. This configuration is only used when the eureka server ip address list is in the DNS. The default is null
93.  
    eureka.client.eureka-server-port=
94.  
    # indicates the path of the eureka registration center. If it is configured as eureka, it is http://x.x.x.x:x/eureka/. Adding this configuration to the eureka configuration file indicates that eureka is registered as a client to the registration center to form an eureka cluster. This configuration is only used in the DNS address list of the eureka server. The default is null.
95.  
    eureka.client.eureka-server-u-r

    -l-context=