linux 使用 nginx 搭建 nacos 集群模式
linux 搭建 nacos 集群，步骤如下
首先准备3台服务器，笔者这里的三台服务器 ip 地址分别是 192.168.0.119；192.168.0.123；192.168.0.114，后面简称为119,123,114
然后为3台服务器配置 java 环境，笔者这里的3台服务器已经成功安装 java 环境，故安装 java 的过程这里就不赘述了，没有配 java 环境的朋友可以参考：https://blog.csdn.net/wsjzzcbq/article/details/82818826
1、官网下载 nacos
官网地址：https://nacos.io/zh-cn/
进入文档，快速开始，下载 最新稳定版本
笔者这里下载的版本是最新的 2.1.0-BETA
2、nacos 集群搭建
2.1、安装 nacos
成功下载安装包后，将 nacos 安装包分别上传到3台服务器
笔者这里将 nacos 安装包上传到 119，然后通过 scp 命令将安装包复制到另外2台服务器
scp 命令
scp /root/nacos-server-2.1.0-BETA.tar.gz [email protected]:/rootscp /root/nacos-server-2.1.0-BETA.tar.gz [email protected]:/root
3台服务器都上传成功后，在3台服务器上分别创建 nacos 安装目录
mkdir -p /usr/local/nacos然后分别将 nacos 安装包解压到新建的 nacos 安装目录
tar -zxvf nacos-server-2.1.0-BETA.tar.gz -C /usr/local/nacos
2.2、配置集群信息
解压完成后，分别进入3台机器的 nacos 的 conf 目录，编辑 cluster.conf 文件，配置集群信息
cd /usr/local/nacos/nacos/conf/进入conf目录后，将 cluster.conf.example 文件修改为 cluster.conf
这里直接复制修改文件名
cp cluster.conf.example cluster.conf
编辑 cluster.conf 文件
vi cluster.conf添加集群配置
读者可修改成自己服务器的 ip 地址
192.168.0.119:8848
192.168.0.123:8848
192.168.0.114:8848 
保存
2.3、配置数据库
笔者这里使用一台数据库，放在119机器上
新建数据库，取名为 nacos
建表 sql
从 nacos 安装目录下的 conf 目录上获取 nacos-mysql.sql
获取将压缩包解压，直接复制
将 nacos-mysql.sql 的内容在 navicat 中执行
建表成功
下面为3台服务器分别配置数据库信息
编辑 application.properties 文件
vi application.properties添加数据库配置信息
db.num=1
db.url.0=jdbc:mysql://192.168.0.119:3306/nacos?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true
db.user=root
db.password=123456
3、启动集群
在启动集群之前，需要在3台服务器的防火墙上分别开放3个端口，分别是8848、9848 和 9849
开放 8848，web页面访问需要
firewall-cmd --zone=public --add-port=8848/tcp --permanent
开放 9848 和 9849
Nacos2.0版本相比1.X新增了gRPC的通信方式，因此需要增加2个端口
firewall-cmd --zone=public --add-port=9848/tcp --permanentfirewall-cmd --zone=public --add-port=9849/tcp --permanent开放后，更新防火墙规则（无需断开连接，动态添加规则）
firewall-cmd --reload
防火墙端口开放成功后，进入bin目录，启动集群
分别进入3台机器的 nacos 的 bin 目录，依次执行启动命令
cd /usr/local/nacos/nacos/bin
启动 nacos
sh startup.sh
4、配置 nginx
在 nginx 中添加如下配置
upstream nacos {
server 192.168.0.119:8848;
server 192.168.0.123:8848;
server 192.168.0.114:8848;
}
server {
listen 80;
server_name cloudnacos;
location / {
proxy_pass http://nacos;
}
}修改 hosts 文件，添加域名 cloudnacos
hosts 文件在 C:\Windows\System32\drivers\etc 目录下
在 hosts 文件中添加 127.0.0.1 cloudnacos
127.0.0.1 cloudnacos
配置完成后，启动 nginx
浏览器访问：http://cloudnacos/nacos
用户名密码默认都是：nacos
查看集群节点
5、服务注册
nginx 配置后，启动成功
新建 nacos 项目，在 bootstrap.yml 文件中添加配置
项目创建过程这里不赘述了
server:
port: 8090
spring:
application:
name: cloud-learn-system
cloud:
nacos:
discovery:
server-addr: http://cloudnacos
config:
server-addr: http://cloudnacos
file-extension: yaml
然后启动项目
项目启动成功后，分别访问 http://192.168.0.119:8848/nacos；http://192.168.0.123:8848/nacos；http://192.168.0.114:8848/nacos 查看服务是否注册成功和是否数据同步
nacos 集群搭建成功
6、其他
nacos 集群关闭命令
sh shutdown.sh如果 nacos 集群启动后，查看 /usr/local/nacos/nacos/logs/start.out 发现报错
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'memoryMonitor' defined in URL [jar:file:/usr/local/nacos/nacos/target/nacos-server.jar!/BOOT-INF/lib/nacos-config-2.1.0-BETA.jar!/com/alibaba/nacos/config/server/monitor/MemoryMonitor.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'asyncNotifyService': Unsatisfied dependency expressed through field 'dumpService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'externalDumpService': Invocation of init method failed; nested exception is ErrCode:500, ErrMsg:Nacos Server did not start because dumpservice bean construction failure :
No DataSource set
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:769)
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:218)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1338)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1185)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:554)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:514)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:321)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:319)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:866)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:312)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204)
at com.alibaba.nacos.Nacos.main(Nacos.java:35)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
at org.springframework.boot.loader.PropertiesLauncher.main(PropertiesLauncher.java:467)
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'asyncNotifyService': Unsatisfied dependency expressed through field 'dumpService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'externalDumpService': Invocation of init method failed; nested exception is ErrCode:500, ErrMsg:Nacos Server did not start because dumpservice bean construction failure :
No DataSource set
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:598)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:376)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1402)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:591)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:514)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:321)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:319)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1276)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1196)
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857)
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760)
... 27 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'externalDumpService': Invocation of init method failed; nested exception is ErrCode:500, ErrMsg:Nacos Server did not start because dumpservice bean construction failure :
No DataSource set
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:139)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:413)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1761)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:514)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:321)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:319)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1276)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1196)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:595)
... 41 common frames omitted
Caused by: com.alibaba.nacos.api.exception.NacosException: Nacos Server did not start because dumpservice bean construction failure :
No DataSource set
at com.alibaba.nacos.config.server.service.dump.DumpService.dumpOperate(DumpService.java:225)
at com.alibaba.nacos.config.server.service.dump.ExternalDumpService.init(ExternalDumpService.java:52)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:363)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:307)
at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:136)
... 53 common frames omitted
Caused by: java.lang.IllegalStateException: No DataSource set
at org.springframework.util.Assert.state(Assert.java:73)
at org.springframework.jdbc.support.JdbcAccessor.obtainDataSource(JdbcAccessor.java:77)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:371)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:452)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:462)
at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:473)
at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:480)
at com.alibaba.nacos.config.server.service.repository.extrnal.ExternalStoragePersistServiceImpl.findConfigMaxId(ExternalStoragePersistServiceImpl.java:674)
at com.alibaba.nacos.config.server.service.dump.processor.DumpAllProcessor.process(DumpAllProcessor.java:51)
at com.alibaba.nacos.config.server.service.dump.DumpService.dumpConfigInfo(DumpService.java:282)
at com.alibaba.nacos.config.server.service.dump.DumpService.dumpOperate(DumpService.java:195)
... 61 common frames omitted很可能是数据库没连接上的问题，可以将数据库放在集群节点之外，保持集群与数据库间良好的网络通信
至此完