Nacos-配置中心搭建

缺乏、安全感 2022-01-09 23:45 310阅读 0赞

# 启动Nacos Server #

这里通过docker来启动[Nacos Docker][]

github上最新的nacos-docker项目与官网描述的有一点不同，这里须要修改几个地方：

修改standalone-derby.yaml

version: "3.7"
    services:
      nacos:
        image: nacos/nacos-server:latest
        container_name: nacos-standalone
        environment:
        - PREFER_HOST_MODE=hostname
        - MODE=standalone
        volumes:
        - ./standalone-logs/:/home/nacos/logs
        - ./init.d/custom.properties:/home/nacos/init.d/custom.properties
        ports:
        - "8848:8848"
      prometheus:
        container_name: prometheus
        image: prom/prometheus:latest
        volumes:
          - ./prometheus/prometheus-standalone.yaml:/etc/prometheus/prometheus.yml
        ports:
          - "9090:9090"
        depends_on:
          - nacos
        restart: on-failure
      grafana:
        container_name: grafana
        image: grafana/grafana:latest
        ports:
          - 3000:3000
        restart: on-failure

第一行的version须要和本机的docker版本对应，见[版本对应][Link 1]

另外nacos使用了挂载：

volumes:
        - ./standalone-logs/:/home/nacos/logs
        - ./init.d/custom.properties:/home/nacos/init.d/custom.properties
    volumes:
          - ./prometheus/prometheus-standalone.yaml:/etc/prometheus/prometheus.yml

须要确认对应目录是否存在，不存在须要创建。

最后执行命令：

docker-compose -f example/standalone-derby.yaml up -d

会下载须要的镜像并启动容器。

![20190620193532876.png][]

至此，Nacos Server启动完成，可通过8848端口访问nacos控制台，默认账号nacos，密码nacos

[http://localhost:8848/nacos/index.html][http_localhost_8848_nacos_index.html]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE1MzU1NDE_size_16_color_FFFFFF_t_70][]

# 配置中心实现 #

这里以[Nacos Spring Cloud][]的配置中心为例,可下载官方example：[nacos-spring-cloud-config-example][]

pom.xml:

<dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        <version>0.2.1.RELEASE</version>
    </dependency>

bootstrap.properties:

spring.cloud.nacos.config.server-addr=127.0.0.1:8848
    
    # Nacos \u63A7\u5236\u53F0\u6DFB\u52A0\u914D\u7F6E\uFF1A
    # Data ID\uFF1Aexample.properties
    # Group\uFF1ADEFAULT_GROUP
    # \u914D\u7F6E\u5185\u5BB9\uFF1AuseLocalCache=true
    spring.application.name=example
    # \u6307\u5B9A\u914D\u7F6E\u7684\u540E\u7F00\uFF0C\u652F\u6301 properties\u3001yaml\u3001yml\uFF0C\u9ED8\u8BA4\u4E3A properties
    spring.cloud.nacos.config.file-extension=properties
    #spring.cloud.nacos.config.file-extension=yaml

ConfigController:

@RestController
    @RequestMapping("/config")
    @RefreshScope
    public class ConfigController {
    
        @Value("${useLocalCache:false}")
        private boolean useLocalCache;
    
        /**
         * http://localhost:8080/config/get
         */
        @RequestMapping("/get")
        public boolean get() {
            return useLocalCache;
        }
    }

启动后访问[http://localhost:8080/config/get][http_localhost_8080_config_get]

![20190620195254173.png][]

发布一个配置项：

curl -X POST "http://192.168.127.135:8848/nacos/v1/cs/configs?dataId=example.properties&group=DEFAULT\_GROUP&content=useLocalCache=true"

再次访问[http://localhost:8080/config/get][http_localhost_8080_config_get]

![20190620201324994.png][]

值已经动态改变了，查看控制台：

![20190620201401662.png][]

已经多了一个配置项

# 自定义Group配置 #

在没有明确指定 `${spring.cloud.nacos.config.group}` 配置的情况下， 默认使用的是 DEFAULT\_GROUP 。如果需要自定义自己的 Group，可以通过以下配置来实现：

spring.cloud.nacos.config.group=DEVELOP_GROUP

发布一个新的group的配置项：

curl -X POST "http://192.168.127.135:8848/nacos/v1/cs/configs?dataId=example.properties&group=DEVELOP\_GROUP&content=useLocalCache=true"

![20190620210945851.png][]

更详细的配置请参考官方[Nacos Config][]

[Nacos Docker]: https://nacos.io/zh-cn/docs/quick-start-docker.html
[Link 1]: https://docs.docker.com/compose/compose-file/
[20190620193532876.png]: /images/20220109/d17a200915a04c598db1e22d3843473d.png
[http_localhost_8848_nacos_index.html]: http://192.168.127.135:8848/nacos/index.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE1MzU1NDE_size_16_color_FFFFFF_t_70]: /images/20220109/bf54ae8b23a64c0c839c4eb1db245961.png
[Nacos Spring Cloud]: https://nacos.io/zh-cn/docs/quick-start-spring-cloud.html
[nacos-spring-cloud-config-example]: https://github.com/nacos-group/nacos-examples/tree/master/nacos-spring-cloud-example/nacos-spring-cloud-config-example
[http_localhost_8080_config_get]: http://localhost:8080/config/get
[20190620195254173.png]: /images/20220109/b591b3ced4284f8588c8bbcc4cedc177.png
[20190620201324994.png]: /images/20220109/fe6011e0fcc342459eb7db6ade9a153b.png
[20190620201401662.png]: /images/20220109/389c775a7c764091ac357e293c791ac8.png
[20190620210945851.png]: /images/20220109/a327c13824144da591b0e28a2c67ce08.png
[Nacos Config]: https://github.com/spring-cloud-incubator/spring-cloud-alibaba/wiki/Nacos-config