Nacos微服务注册问题排查

项目组反馈微服务注册不上nacos，于是开始问题排查：

#1、查看nacos日志

2021-05-06 23:59:55,908 WARN [CLIENT-BEAT] The instance has been removed for health mechanism, perform data compensation operations, beat: {"load":0.0,"cpu":0.0,"rt":0.0,"qps":0.0,"mem":0.0,"port":8305,"ip":"172.30.125.54","serviceName":"DEFAULT_GROUP@@dmp-analysis","cluster":"DEFAULT","weight":1.0,"ephemeral":true,"metadata":{"preserved.register.source":"SPRING_CLOUD"}}, serviceName: DEFAULT_GROUP@@dmp-analysis

##微服务注册上来后，过了会就会被踢下线。

#2、查看具体微服务日志

2021-05-07 14:40:27.643 [INFO ] [com.alibaba.nacos.naming.beat.sender] [NamingProxy.java:196] - [REGISTER-SERVICE] public registering service DEFAULT_GROUP@@dmp-system with instance: {"clusterName":"DEFAULT","enabled":true,"ephemeral":true,"healthy":true,"instanceHeartBeatInterval":5000,"instanceHeartBeatTimeOut":15000,"ip":"172.30.125.54","ipDeleteTimeout":30000,"metadata":{"preserved.register.source":"SPRING_CLOUD"},"port":8304,"serviceName":"DEFAULT_GROUP@@dmp-system","weight":1.0}

##查看nacos的进程信息

##netstat -lntp | grep 8848

发现协议是ip v6，而微服务那块是通过ip v4来通信的。所以我们的方案是先禁用ip v6，通过ip v4来通信。

##禁用IPv6

sysctl -w net.ipv6.conf.all.disable_ipv6=1

sysctl -w net.ipv6.conf.default.disable_ipv6=1

##重启nacos

sh shutdown.sh

sh startup.sh -m standalone

##查看nacos的进程信息 netstat -lntp | grep 8848

已监听ip v4地址。至此问题解决。