Nacos源码解析-启动报错 - 程序员大晖 Blog

一.nacos部署_单机模式

nacos1.4.1之前存在致命bug，构造特定url请求接口可以绕过接口权限认证直接获取数据（可怕）

nacos默认的启动模式为cluster集群模式，如果需要部署为单机模式需要在运行start.sh的时候指定-m参数（model）为"standalone"
nacos下载地址： nacos1.4.1

wget https://github.com/alibaba/nacos/releases/download/1.4.1/nacos-server-1.4.1.tar.gz

tar -zxvf nacos-server-1.4.1.tar.gz

解压后bin下面包含启动和关闭的shell脚本
默认的用户名和密码为nacos nacos
需要修改密码需要整合自定义数据库在conf目录下有数据库文件nacos-mysql.sql

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/******************************************/
/*   数据库全名 = nacos_config   */
/*   表名称 = config_info   */
/******************************************/
CREATE TABLE `config_info` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `data_id` varchar(255) NOT NULL COMMENT 'data_id',
  `group_id` varchar(255) DEFAULT NULL,
  `content` longtext NOT NULL COMMENT 'content',
  `md5` varchar(32) DEFAULT NULL COMMENT 'md5',
  `gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
  `src_user` text COMMENT 'source user',
  `src_ip` varchar(50) DEFAULT NULL COMMENT 'source ip',
  `app_name` varchar(128) DEFAULT NULL,
  `tenant_id` varchar(128) DEFAULT '' COMMENT '租户字段',
  `c_desc` varchar(256) DEFAULT NULL,
  `c_use` varchar(64) DEFAULT NULL,
  `effect` varchar(64) DEFAULT NULL,
  `type` varchar(64) DEFAULT NULL,
  `c_schema` text,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_configinfo_datagrouptenant` (`data_id`,`group_id`,`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='config_info';

/******************************************/
/*   数据库全名 = nacos_config   */
/*   表名称 = config_info_aggr   */
/******************************************/
CREATE TABLE `config_info_aggr` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `data_id` varchar(255) NOT NULL COMMENT 'data_id',
  `group_id` varchar(255) NOT NULL COMMENT 'group_id',
  `datum_id` varchar(255) NOT NULL COMMENT 'datum_id',
  `content` longtext NOT NULL COMMENT '内容',
  `gmt_modified` datetime NOT NULL COMMENT '修改时间',
  `app_name` varchar(128) DEFAULT NULL,
  `tenant_id` varchar(128) DEFAULT '' COMMENT '租户字段',
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_configinfoaggr_datagrouptenantdatum` (`data_id`,`group_id`,`tenant_id`,`datum_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='增加租户字段';


/******************************************/
/*   数据库全名 = nacos_config   */
/*   表名称 = config_info_beta   */
/******************************************/
CREATE TABLE `config_info_beta` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `data_id` varchar(255) NOT NULL COMMENT 'data_id',
  `group_id` varchar(128) NOT NULL COMMENT 'group_id',
  `app_name` varchar(128) DEFAULT NULL COMMENT 'app_name',
  `content` longtext NOT NULL COMMENT 'content',
  `beta_ips` varchar(1024) DEFAULT NULL COMMENT 'betaIps',
  `md5` varchar(32) DEFAULT NULL COMMENT 'md5',
  `gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
  `src_user` text COMMENT 'source user',
  `src_ip` varchar(50) DEFAULT NULL COMMENT 'source ip',
  `tenant_id` varchar(128) DEFAULT '' COMMENT '租户字段',
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_configinfobeta_datagrouptenant` (`data_id`,`group_id`,`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='config_info_beta';

/******************************************/
/*   数据库全名 = nacos_config   */
/*   表名称 = config_info_tag   */
/******************************************/
CREATE TABLE `config_info_tag` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `data_id` varchar(255) NOT NULL COMMENT 'data_id',
  `group_id` varchar(128) NOT NULL COMMENT 'group_id',
  `tenant_id` varchar(128) DEFAULT '' COMMENT 'tenant_id',
  `tag_id` varchar(128) NOT NULL COMMENT 'tag_id',
  `app_name` varchar(128) DEFAULT NULL COMMENT 'app_name',
  `content` longtext NOT NULL COMMENT 'content',
  `md5` varchar(32) DEFAULT NULL COMMENT 'md5',
  `gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
  `src_user` text COMMENT 'source user',
  `src_ip` varchar(50) DEFAULT NULL COMMENT 'source ip',
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_configinfotag_datagrouptenanttag` (`data_id`,`group_id`,`tenant_id`,`tag_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='config_info_tag';

/******************************************/
/*   数据库全名 = nacos_config   */
/*   表名称 = config_tags_relation   */
/******************************************/
CREATE TABLE `config_tags_relation` (
  `id` bigint(20) NOT NULL COMMENT 'id',
  `tag_name` varchar(128) NOT NULL COMMENT 'tag_name',
  `tag_type` varchar(64) DEFAULT NULL COMMENT 'tag_type',
  `data_id` varchar(255) NOT NULL COMMENT 'data_id',
  `group_id` varchar(128) NOT NULL COMMENT 'group_id',
  `tenant_id` varchar(128) DEFAULT '' COMMENT 'tenant_id',
  `nid` bigint(20) NOT NULL AUTO_INCREMENT,
  PRIMARY KEY (`nid`),
  UNIQUE KEY `uk_configtagrelation_configidtag` (`id`,`tag_name`,`tag_type`),
  KEY `idx_tenant_id` (`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='config_tag_relation';

/******************************************/
/*   数据库全名 = nacos_config   */
/*   表名称 = group_capacity   */
/******************************************/
CREATE TABLE `group_capacity` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键ID',
  `group_id` varchar(128) NOT NULL DEFAULT '' COMMENT 'Group ID，空字符表示整个集群',
  `quota` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '配额，0表示使用默认值',
  `usage` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '使用量',
  `max_size` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '单个配置大小上限，单位为字节，0表示使用默认值',
  `max_aggr_count` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '聚合子配置最大个数，，0表示使用默认值',
  `max_aggr_size` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '单个聚合数据的子配置大小上限，单位为字节，0表示使用默认值',
  `max_history_count` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '最大变更历史数量',
  `gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_group_id` (`group_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='集群、各Group容量信息表';

/******************************************/
/*   数据库全名 = nacos_config   */
/*   表名称 = his_config_info   */
/******************************************/
CREATE TABLE `his_config_info` (
  `id` bigint(64) unsigned NOT NULL,
  `nid` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `data_id` varchar(255) NOT NULL,
  `group_id` varchar(128) NOT NULL,
  `app_name` varchar(128) DEFAULT NULL COMMENT 'app_name',
  `content` longtext NOT NULL,
  `md5` varchar(32) DEFAULT NULL,
  `gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `src_user` text,
  `src_ip` varchar(50) DEFAULT NULL,
  `op_type` char(10) DEFAULT NULL,
  `tenant_id` varchar(128) DEFAULT '' COMMENT '租户字段',
  PRIMARY KEY (`nid`),
  KEY `idx_gmt_create` (`gmt_create`),
  KEY `idx_gmt_modified` (`gmt_modified`),
  KEY `idx_did` (`data_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='多租户改造';


/******************************************/
/*   数据库全名 = nacos_config   */
/*   表名称 = tenant_capacity   */
/******************************************/
CREATE TABLE `tenant_capacity` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT COMMENT '主键ID',
  `tenant_id` varchar(128) NOT NULL DEFAULT '' COMMENT 'Tenant ID',
  `quota` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '配额，0表示使用默认值',
  `usage` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '使用量',
  `max_size` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '单个配置大小上限，单位为字节，0表示使用默认值',
  `max_aggr_count` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '聚合子配置最大个数',
  `max_aggr_size` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '单个聚合数据的子配置大小上限，单位为字节，0表示使用默认值',
  `max_history_count` int(10) unsigned NOT NULL DEFAULT '0' COMMENT '最大变更历史数量',
  `gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
  `gmt_modified` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_tenant_id` (`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='租户容量信息表';


CREATE TABLE `tenant_info` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT 'id',
  `kp` varchar(128) NOT NULL COMMENT 'kp',
  `tenant_id` varchar(128) default '' COMMENT 'tenant_id',
  `tenant_name` varchar(128) default '' COMMENT 'tenant_name',
  `tenant_desc` varchar(256) DEFAULT NULL COMMENT 'tenant_desc',
  `create_source` varchar(32) DEFAULT NULL COMMENT 'create_source',
  `gmt_create` bigint(20) NOT NULL COMMENT '创建时间',
  `gmt_modified` bigint(20) NOT NULL COMMENT '修改时间',
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_tenant_info_kptenantid` (`kp`,`tenant_id`),
  KEY `idx_tenant_id` (`tenant_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='tenant_info';

CREATE TABLE `users` (
	`username` varchar(50) NOT NULL PRIMARY KEY,
	`password` varchar(500) NOT NULL,
	`enabled` boolean NOT NULL
);

CREATE TABLE `roles` (
	`username` varchar(50) NOT NULL,
	`role` varchar(50) NOT NULL,
	UNIQUE INDEX `idx_user_role` (`username` ASC, `role` ASC) USING BTREE
);

CREATE TABLE `permissions` (
    `role` varchar(50) NOT NULL,
    `resource` varchar(255) NOT NULL,
    `action` varchar(8) NOT NULL,
    UNIQUE INDEX `uk_role_permission` (`role`,`resource`,`action`) USING BTREE
);

INSERT INTO users (username, password, enabled) VALUES ('nacos', '$2a$10$EuWPZHzz32dJN7jexM34MOeYirDdFAZm2kuWj7VEOJhhZkDrxfvUu', TRUE);

INSERT INTO roles (username, role) VALUES ('nacos', 'ROLE_ADMIN');

建好数据库之后需要修改conf目录下application.properties文件


spring.datasource.platform=mysql

### Count of DB:
db.num=1

### Connect URL of DB:
db.url.0=jdbc:mysql://192.168.12.149:3307/nacos_config?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC
db.user.0=root
db.password.0=root

配置好数据库之后运行启动脚本

sh startup.sh
-----
[root@sz_gl_server01_12_146 bin]# sh startup.sh
/usr/local/lib/jdk1.8/jdk1.8.0_152/bin/java  -server -Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/usr/local/bin/nacos/logs/java_heapdump.hprof -XX:-UseLargePages -Dnacos.member.list= -Djava.ext.dirs=/usr/local/lib/jdk1.8/jdk1.8.0_152/jre/lib/ext:/usr/local/lib/jdk1.8/jdk1.8.0_152/lib/ext -Xloggc:/usr/local/bin/nacos/logs/nacos_gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M -Dloader.path=/usr/local/bin/nacos/plugins/health,/usr/local/bin/nacos/plugins/cmdb -Dnacos.home=/usr/local/bin/nacos -jar /usr/local/bin/nacos/target/nacos-server.jar  --spring.config.additional-location=file:/usr/local/bin/nacos/conf/ --logging.config=/usr/local/bin/nacos/conf/nacos-logback.xml --server.max-http-header-size=524288
nacos is starting with cluster
nacos is starting，you can check the /usr/local/bin/nacos/logs/start.out

启动后访问8848端口发现无法连接 1.检查启动日志 ps:注意：不要立刻检查防火墙是否开启8848端口或其他操作，也不要使用ps命令来确定服务是否启动成功，因为有时候服务报错异常也会有异常启动，进程不会关闭

[root@sz_gl_server01_12_146 logs]# ps -ef | grep nacos
root     53568     1  5 17:37 pts/2    00:00:25 /usr/local/lib/jdk1.8/jdk1.8.0_152/bin/java -server -Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/usr/local/bin/nacos/logs/java_heapdump.hprof -XX:-UseLargePages -Dnacos.member.list= -Djava.ext.dirs=/usr/local/lib/jdk1.8/jdk1.8.0_152/jre/lib/ext:/usr/local/lib/jdk1.8/jdk1.8.0_152/lib/ext -Xloggc:/usr/local/bin/nacos/logs/nacos_gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M -Dloader.path=/usr/local/bin/nacos/plugins/health,/usr/local/bin/nacos/plugins/cmdb -Dnacos.home=/usr/local/bin/nacos -jar /usr/local/bin/nacos/target/nacos-server.jar --spring.config.additional-location=file:/usr/local/bin/nacos/conf/ --logging.config=/usr/local/bin/nacos/conf/nacos-logback.xml --server.max-http-header-size=524288 nacos.nacos
root     54429 51483  0 17:44 pts/2    00:00:00 grep --color=auto nacos

所以，如果存在日志，那么立刻去查看日志，确保服务启动成功
按照启动打印出的信息，查看启动输出日志/usr/local/bin/nacos/logs/start.out

2021-05-07 17:37:31,732 INFO The server IP list of Nacos is []
2021-05-07 17:37:32,733 INFO Nacos is starting...
2021-05-07 17:37:33,733 INFO Nacos is starting...
2021-05-07 17:37:57,414 ERROR Startup errors : {}
1. org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
2. Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'serverMemberManager'    Bean instantiation via constructor failed;
3. Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.alibaba.nacos.core.cluster.ServerMemberManager]: Constructor threw exception; nested exception is ErrCode:500, ErrMsg:jmenv.tbsite.net
4. Caused by: java.net.UnknownHostException: jmenv.tbsite.net

上面的日志我已经删减了,留下了关键部分,下面我们从nacos的源码分析下问题的原因:
首先可以看到一个bean创建失败,也就是spring容器在初始化的时候就没有成功,这个bean的名字是serverMemberManager,在源码中找到com.alibaba.nacos.core.cluster.ServerMemberManager,其中重要的一个报错信息是Bean instantiation via constructor failed;,说明报错的地方在构造方法中

    public ServerMemberManager(ServletContext servletContext) throws Exception {
        //使用跳保存serverList
        this.serverList = new ConcurrentSkipListMap<>();
        //
        EnvUtil.setContextPath(servletContext.getContextPath());
        init();
    }

接着查看启动的nacos.log日志

2021-05-07 17:37:36,902 INFO HikariPool-1 - Start completed.
2021-05-07 17:37:37,302 INFO Nacos-related cluster resource initialization
2021-05-07 17:37:37,317 INFO ServerListService address-server port:8080
2021-05-07 17:37:37,317 INFO ADDRESS_SERVER_URL:http://jmenv.tbsite.net:8080/nacos/serverlist
2021-05-07 17:37:37,771 INFO Nacos is starting...

protected void init() throws NacosException {
        //初始化执行了
        Loggers.CORE.info("Nacos-related cluster resource initialization");
        this.port = EnvUtil.getProperty("server.port", Integer.class, 8848);
        this.localAddress = InetUtils.getSelfIP() + ":" + port;
        this.self = MemberUtil.singleParse(this.localAddress);
        this.self.setExtendVal(MemberMetaDataConstants.VERSION, VersionUtils.version);
        //初始化的时候讲自己放入serverList中
        serverList.put(self.getAddress(), self);

        // register NodeChangeEvent publisher to NotifyManager
        //注册节点变化事件
        registerClusterEvent();

        // Initializes the lookup mode
        //通过中间查找服务来发现和访问资源的方式
        initAndStartLookup();

        if (serverList.isEmpty()) {
            throw new NacosException(NacosException.SERVER_ERROR, "cannot get serverlist, so exit.");
        }
        //节点资源初始化完毕
        Loggers.CORE.info("The cluster resource is initialized");
    }

按照调用栈我们找到：

    private void initAndStartLookup() throws NacosException {
        //重点来了，从这里开始，创建lookup
        this.lookup = LookupFactory.createLookUp(this);
        //获取到lookup对象后就执行其start方法
        this.lookup.start();
    }

    public static MemberLookup createLookUp(ServerMemberManager memberManager) throws NacosException {
        //集群启动所以会进入这个if
        if (!EnvUtil.getStandaloneMode()) {
            String lookupType = EnvUtil.getProperty(LOOKUP_MODE_TYPE);
            LookupType type = chooseLookup(lookupType);
               //重点看这个find方法
            LOOK_UP = find(type);
            currentLookupType = type;
        } else {
            LOOK_UP = new StandaloneMemberLookup();
        }
        LOOK_UP.injectMemberManager(memberManager);
        Loggers.CLUSTER.info("Current addressing mode selection : {}", LOOK_UP.getClass().getSimpleName());
        return LOOK_UP;
    }

    private static MemberLookup find(LookupType type) {
        if (LookupType.FILE_CONFIG.equals(type)) {
            LOOK_UP = new FileConfigMemberLookup();
            return LOOK_UP;
        }
        if (LookupType.ADDRESS_SERVER.equals(type)) {
            //这里new了u一个AddressServerMemberLookup
            LOOK_UP = new AddressServerMemberLookup();
            return LOOK_UP;
        }
        // unpossible to run here
        throw new IllegalArgumentException();
    }

上面的代码执行完后等于找到了当前的lookup，之后会执行其start方法，如下，重点就在这块了

    @Override
    public void start() throws NacosException {
        if (start.compareAndSet(false, true)) {
            this.maxFailCount = Integer.parseInt(EnvUtil.getProperty("maxHealthCheckFailCount", "12"));
            initAddressSys();
            run();
        }
    }

private void initAddressSys() {
    String envDomainName = System.getenv("address_server_domain");
    if (StringUtils.isBlank(envDomainName)) {
    //这里获取当前服务节点的地址，但是配置文件中没有，所以走默认的，所以获取到的当前自身节点的地址事jmenv.tbsite.net，这就是关键问题所在
        domainName = EnvUtil.getProperty("address.server.domain", "jmenv.tbsite.net");
    } else {
        domainName = envDomainName;
    }
    String envAddressPort = System.getenv("address_server_port");
    if (StringUtils.isBlank(envAddressPort)) {
        addressPort = EnvUtil.getProperty("address.server.port", "8080");
    } else {
        addressPort = envAddressPort;
    }
    String envAddressUrl = System.getenv("address_server_url");
    if (StringUtils.isBlank(envAddressUrl)) {
        addressUrl = EnvUtil.getProperty("address.server.url", EnvUtil.getContextPath() + "/" + "serverlist");
    } else {
        addressUrl = envAddressUrl;
    }
    addressServerUrl = "http://" + domainName + ":" + addressPort + addressUrl;
    envIdUrl = "http://" + domainName + ":" + addressPort + "/env";
     
     //在日志中可以看到这两行日志的打印
    Loggers.CORE.info("ServerListService address-server port:" + addressPort);
    Loggers.CORE.info("ADDRESS_SERVER_URL:" + addressServerUrl);
}

执行的start方法:

    @Override
    public void start() throws NacosException {
        if (start.compareAndSet(false, true)) {
            this.maxFailCount = Integer.parseInt(EnvUtil.getProperty("maxHealthCheckFailCount", "12"));
            initAddressSys();
            run();
        }
    }

    private void run() throws NacosException {
        // With the address server, you need to perform a synchronous member node pull at startup
        // Repeat three times, successfully jump out
        boolean success = false;
        Throwable ex = null;
        int maxRetry = EnvUtil.getProperty("nacos.core.address-server.retry", Integer.class, 5);
        for (int i = 0; i < maxRetry; i++) {
            try {
                //问题主要出在这个方法中
                syncFromAddressUrl();
                success = true;
                break;
            } catch (Throwable e) {
                ex = e;
                Loggers.CLUSTER.error("[serverlist] exception, error : {}", ExceptionUtil.getAllExceptionMsg(ex));
            }
        }
        if (!success) {
            throw new NacosException(NacosException.SERVER_ERROR, ex);
        }

        GlobalExecutor.scheduleByCommon(new AddressServerSyncTask(), 5_000L);
    }

  private void syncFromAddressUrl() throws Exception {
            //这里使用nacos中的restTemplate请求当前节点获取服务列表就会请求不通,因为默认的配置文件中的地址不是本地地址
            //address.server.domain=jmenv.tbsite.net  
            //所以如果想使用集群模式启动单机模式,只需要开启这个默认的配置,并且修改为本地ip即可
        RestResult<String> result = restTemplate
                .get(addressServerUrl, Header.EMPTY, Query.EMPTY, genericType.getType());
        if (result.ok()) {
            isAddressServerHealth = true;
            Reader reader = new StringReader(result.getData());
            try {
                afterLookup(MemberUtil.readServerConf(EnvUtil.analyzeClusterConf(reader)));
            } catch (Throwable e) {
                Loggers.CLUSTER.error("[serverlist] exception for analyzeClusterConf, error : {}",
                        ExceptionUtil.getAllExceptionMsg(e));
            }
            addressServerFailCount = 0;
        } else {
            addressServerFailCount++;
            if (addressServerFailCount >= maxFailCount) {
                isAddressServerHealth = false;
            }
            Loggers.CLUSTER.error("[serverlist] failed to get serverlist, error code {}", result.getCode());
        }
    }

或者直接修改startup.sh文件

export SERVER="nacos-server"
export MODE="standalone"
export FUNCTION_MODE="all"
export MEMBER_LIST=""
export EMBEDDED_STORAGE=""

启动成功后登录控制台即可修改密码

二.nacos部署_集群模式

次线知识点

ConcurrentSkipListMap jdk中实现的跳表  



```

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最后编辑时间为: 2021/05/08 18:33