文章目录
- Spring Cloud Alibaba Nacos注册中心(单机)
- 1. docker 安装 nacos(先别着急)
- 2. 配置nacos持久化到mysql、
- 2.1 properties 文件
- 3. java注册
- 3.1 POM文件
- 3.2 properties文件
- 3.3 测试配置中心
- 4.注册中心
- 4.1 配置文件
- 4.2测试类
- 4.3 补充演示
Spring Cloud Alibaba Nacos注册中心(单机)
1. docker 安装 nacos(先别着急)
docker run --name nacos -e MODE=standalone -p 8848:8848 -d nacos/nacos-server:1.4.1
确实可以下载并运行nacos,但是nacos 本身属于内存中运行的,所以需要将其持久化
2. 配置nacos持久化到mysql、
2.1 properties 文件
注意配置自己的端口号和IP地址
#
# 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.
#
#*************** Spring Boot Related Configurations ***************#
### Default web context path:
server.servlet.contextPath=/nacos
### Default web server port:
server.port=8848
#*************** Network Related Configurations ***************#
### If prefer hostname over ip for Nacos server addresses in cluster.conf:
# nacos.inetutils.prefer-hostname-over-ip=false
### Specify local server's IP:
# nacos.inetutils.ip-address=
#*************** Config Module Related Configurations ***************#
### If use MySQL as datasource:
# spring.datasource.platform=mysql
### Count of DB:
db.num=1
### Connect URL of DB:
db.url.0=jdbc:mysql://自己的:3306/nacos_config?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&useUnicode=true&useSSL=false&serverTimezone=UTC
db.user.0=root
db.password.0=root123
### Connection pool configuration: hikariCP
db.pool.config.connectionTimeout=30000
db.pool.config.validationTimeout=10000
db.pool.config.maximumPoolSize=20
db.pool.config.minimumIdle=2
#*************** Naming Module Related Configurations ***************#
### Data dispatch task execution period in milliseconds:
# nacos.naming.distro.taskDispatchPeriod=200
### Data count of batch sync task:
# nacos.naming.distro.batchSyncKeyCount=1000
### Retry delay in milliseconds if sync task failed:
# nacos.naming.distro.syncRetryDelay=5000
### If enable data warmup. If set to false, the server would accept request without local data preparation:
# nacos.naming.data.warmup=true
### If enable the instance auto expiration, kind like of health check of instance:
# nacos.naming.expireInstance=true
nacos.naming.empty-service.auto-clean=true
nacos.naming.empty-service.clean.initial-delay-ms=50000
nacos.naming.empty-service.clean.period-time-ms=30000
#*************** CMDB Module Related Configurations ***************#
### The interval to dump external CMDB in seconds:
# nacos.cmdb.dumpTaskInterval=3600
### The interval of polling data change event in seconds:
# nacos.cmdb.eventTaskInterval=10
### The interval of loading labels in seconds:
# nacos.cmdb.labelTaskInterval=300
### If turn on data loading task:
# nacos.cmdb.loadDataAtStart=false
#*************** Metrics Related Configurations ***************#
### Metrics for prometheus
#management.endpoints.web.exposure.include=*
### Metrics for elastic search
management.metrics.export.elastic.enabled=false
#management.metrics.export.elastic.host=http://localhost:9200
### Metrics for influx
management.metrics.export.influx.enabled=false
#management.metrics.export.influx.db=springboot
#management.metrics.export.influx.uri=http://localhost:8086
#management.metrics.export.influx.auto-create-db=true
#management.metrics.export.influx.consistency=one
#management.metrics.export.influx.compressed=true
#*************** Access Log Related Configurations ***************#
### If turn on the access log:
server.tomcat.accesslog.enabled=true
### The access log pattern:
server.tomcat.accesslog.pattern=%h %l %u %t "%r" %s %b %D %{User-Agent}i %{Request-Source}i
### The directory of access log:
server.tomcat.basedir=
#*************** Access Control Related Configurations ***************#
### If enable spring security, this option is deprecated in 1.2.0:
#spring.security.enabled=false
### The ignore urls of auth, is deprecated in 1.2.0:
nacos.security.ignore.urls=/,/error,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.ico,/console-ui/public/**,/v1/auth/**,/v1/console/health/**,/actuator/**,/v1/console/server/**
### The auth system to use, currently only 'nacos' is supported:
nacos.core.auth.system.type=nacos
### If turn on auth system:
nacos.core.auth.enabled=false
### The token expiration in seconds:
nacos.core.auth.default.token.expire.seconds=18000
### The default token:
nacos.core.auth.default.token.secret.key=SecretKey012345678901234567890123456789012345678901234567890123456789
### Turn on/off caching of auth information. By turning on this switch, the update of auth information would have a 15 seconds delay.
nacos.core.auth.caching.enabled=true
### Since 1.4.1, Turn on/off white auth for user-agent: nacos-server, only for upgrade from old version.
nacos.core.auth.enable.userAgentAuthWhite=true
### Since 1.4.1, worked when nacos.core.auth.enabled=true and nacos.core.auth.enable.userAgentAuthWhite=false.
### The two properties is the white list for auth and used by identity the request from other server.
nacos.core.auth.server.identity.key=
nacos.core.auth.server.identity.value=
#*************** Istio Related Configurations ***************#
### If turn on the MCP server:
nacos.istio.mcp.server.enabled=false
###*************** Add from 1.3.0 ***************###
#*************** Core Related Configurations ***************#
### set the WorkerID manually
# nacos.core.snowflake.worker-id=
### Member-MetaData
# nacos.core.member.meta.site=
# nacos.core.member.meta.adweight=
# nacos.core.member.meta.weight=
### MemberLookup
### Addressing pattern category, If set, the priority is highest
# nacos.core.member.lookup.type=[file,address-server]
## Set the cluster list with a configuration file or command-line argument
# nacos.member.list=192.168.16.101:8847?raft_port=8807,192.168.16.101?raft_port=8808,192.168.16.101:8849?raft_port=8809
## for AddressServerMemberLookup
# Maximum number of retries to query the address server upon initialization
# nacos.core.address-server.retry=5
## Server domain name address of [address-server] mode
# address.server.domain=jmenv.tbsite.net
## Server port of [address-server] mode
# address.server.port=8080
## Request address of [address-server] mode
# address.server.url=/nacos/serverlist
#*************** JRaft Related Configurations ***************#
### Sets the Raft cluster election timeout, default value is 5 second
# nacos.core.protocol.raft.data.election_timeout_ms=5000
### Sets the amount of time the Raft snapshot will execute periodically, default is 30 minute
# nacos.core.protocol.raft.data.snapshot_interval_secs=30
### raft internal worker threads
# nacos.core.protocol.raft.data.core_thread_num=8
### Number of threads required for raft business request processing
# nacos.core.protocol.raft.data.cli_service_thread_num=4
### raft linear read strategy. Safe linear reads are used by default, that is, the Leader tenure is confirmed by heartbeat
# nacos.core.protocol.raft.data.read_index_type=ReadOnlySafe
### rpc request timeout, default 5 seconds
# nacos.core.protocol.raft.data.rpc_request_timeout_ms=5000
2.2 数据库文件
官网上有,可以自己找找,我就直接复制啦
/*
* 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.
*/
CREATE DATABASE IF NOT EXISTS nacos_config;
USE nacos_config;
/******************************************/
/* 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');
先上传properties至linux中,执行下面命令
建议使用绝对路径
docker run --name nacos -d -p 8848:8848 --privileged=true --restart=always -e JVM_XMS=256m -e JVM_XMX=256m -e MODE=standalone -e PREFER_HOST_MODE=hostname -v /root/docker/nacos/logs:/home/nacos/logs -e SPRING_DATASOURCE_PLATFORM=mysql -v /root/docker/nacos/conf/application.properties:/home/nacos/conf/application.properties -v /root/docker/nacos/data:/home/nacos/data nacos/nacos-server:1.4.1
再windows主机上链接 记住加上/nacos 用户名 密码均为nacos
3. java注册
3.1 POM文件
作者用的是父子项目,所以有两个pom文件,只粘贴主要的依赖啦,因为俩在一块也丝毫不影响
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.11.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.hb</groupId>
<artifactId>spring-cloud-root</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<properties>
<java.version>1.8</java.version>
<spring.cloud.version>Hoxton.SR8</spring.cloud.version>
<spring.cloud.alibaba.version>2.2.5.RELEASE</spring.cloud.alibaba.version>
</properties>
<modules>
<module>spring-cloud-nacos</module>
</modules>
<dependencyManagement>
<dependencies>
<!--Spring Cloud的版本管理-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring.cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring.cloud.alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
子项目文件
<parent>
<groupId>com.hb</groupId>
<artifactId>spring-cloud-root</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../pom.xml</relativePath>
</parent>
<artifactId>spring-cloud-nacos</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 配置服务用的-->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
</plugins>
</build>
3.2 properties文件
application.properties
spring.application.name=nacos-a
logging.level.root = error
logging.level.com.hb = debug
bootstrap.properties
#-------------- Nacos配置中心
spring.cloud.nacos.config.server-addr=192.168.14.58:8848
#如果你配置了,按照这个值最为Data Id去找, 如果你不配置使用的是 spring.application.name 配置的值
spring.cloud.nacos.config.name = nacos-a
# 如果你不配置默认中的是public
spring.cloud.nacos.config.namespace = public
spring.cloud.nacos.config.group = DEFAULT_GROUP
# 注册服务中心
# Nacos 服务发现与注册配置,其中子属性 server-addr 指定 Nacos 服务器主机和端口
spring.cloud.nacos.discovery.server-addr=192.168.14.58:8848
重要: 需要特别配置的原因是因为需要先抓取bootstrap。properties文件,找到ip地址,才能正确启动配置中心
3.3 测试配置中心
这里仅测试是否获取值,
@RestController
//含义是在上方可视化的网页中刷新配置的时候自动找到新值
@RefreshScope
public class TestController {
@Value("${a:10086}")
private String a;
@GetMapping("/test")
public String test1(){
return a;
}
新建配置
4.注册中心
上方已经导入jar包但是需要注意的是注册中心的核心jar包
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
4.1 配置文件
@Configuration
public class RestConfig {
@Bean
@LoadBalanced
//注意:如果使用服务注册中心,需要添加@LoadBalanced注解
//加上该注解之后,RestTemplate会把请求的一级目录最为服务名,去服务注册中心抓取对应的ip,然后再去调用对应的接口数据
public RestTemplate restTemplate() {
return new RestTemplate();
}
}
4.2测试类
注意如果使用ip地址则需将上方的@LoadBalanced注解注释掉,因为@LoadBalanced会根据名字去namspace中找与其名字相同的服务
@GetMapping("/test1")
public String test(){
String forObject = restTemplate.getForObject("http://192.168.14.53:8080/port", String.class);
System.out.println(forObject);
return forObject;
}
补充一点
查看方法
这种情况会导致使用ip地址链接超时的情况,加入自己的真是ip地址即可
在nacos的管理页面查看即可
@GetMapping("/test1")
public String test(){
String forObject = restTemplate.getForObject("http://nacos-a:8080/port", String.class);
System.out.println(forObject);
return forObject;
}
这里是在同一个里面通过http请求调用自己,其实只要两个在一个命名空间里面 也就是上方配置的public,都可访问,下方演示一下
4.3 补充演示
将原本的改为nacos-b并以默认端口运行
注意:为什么第一个@Value注入的是9999 而第二个却根据自己的9090端口号运行
原因就是,第一次打开的8080是系统默认选择的端口号,并没有配置,而第二次测试则是配置啦server.port=9090