Eureka多网卡选择

ip注册

eureka:
  instance:
    prefer-ip-address: true

表示将自己的ip注册到EurekaServer上。不配置或false，表示将操作系统的hostname注册到server

服务器有多个网卡

eh0，eh1，eh2，只有eh0可以让外部其他服务访问进来，而Eureka client将eh1和eh2注册到Eureka server上，这样其他服务就无法访问该微服务了

指定Ip

eureka:
     instance:
       prefer-ip-address: true
       ip-address: 实际能访问到的Ip

如果设置了此时的ip-address，在元数据查看到就是此ip，其他服务也通过此ip来调用

{
       "host": "127.0.0.1",
       "port": 8084,
       "metadata": {
           "yueyi": "2019",
           "user.password": "root",
           "management.port": "8084",
           "jmx.port": "61378",
           "user.name": "root"
       },
       "secure": false,
       "uri": "http://127.0.0.1:8084",
       "instanceId": "api-listen-order:30.136.133.11:port",
       "serviceId": "API-LISTEN-ORDER",
       "instanceInfo": {
           "instanceId": "api-listen-order:30.136.133.11:port",
           "app": "API-LISTEN-ORDER",
           "appGroupName": null,
           "ipAddr": "127.0.0.1",
           "sid": "na",
           "homePageUrl": "http://127.0.0.1:8084/",
           "statusPageUrl": "http://127.0.0.1:8084/actuator/info",
           "healthCheckUrl": "http://127.0.0.1:8084/actuator/health",
           "secureHealthCheckUrl": null,
           "vipAddress": "api-listen-order",
           "secureVipAddress": "api-listen-order",
           "countryId": 1,
           "dataCenterInfo": {
               "@class": "com.netflix.appinfo.InstanceInfo$DefaultDataCenterInfo",
               "name": "MyOwn"
           },
           "hostName": "127.0.0.1",
           "status": "UP",
           "overriddenStatus": "UNKNOWN",
           "leaseInfo": {
               "renewalIntervalInSecs": 1,
               "durationInSecs": 1,
               "registrationTimestamp": 1579489514655,
               "lastRenewalTimestamp": 1579489524146,
               "evictionTimestamp": 0,
               "serviceUpTimestamp": 1579489514147
           },
           "isCoordinatingDiscoveryServer": false,
           "metadata": {
               "yueyi": "2019",
               "user.password": "root",
               "management.port": "8084",
               "jmx.port": "61378",
               "user.name": "root"
           },
           "lastUpdatedTimestamp": 1579489514655,
           "lastDirtyTimestamp": 1579489514111,
           "actionType": "ADDED",
           "asgName": null
       },
       "scheme": null
   }