分布式配置中心SpringCloud Config

超、凢脫俗 2022-05-08 09:26 530阅读 0赞

## 分布式配置中心SpringCloud Config ##

### 文章目录 ###

*   *  分布式配置中心SpringCloud Config
     *   *  快速入门
         *   *  构建配置中心
             *  配置规则详解
             *  客户端配置映射
         *  Git 配置仓库
         *  本地仓库
         *  属性覆盖
         *  安全保护
         *  服务化配置中心
         *  失败快速响应与重试
         *  动态刷新配置

### 快速入门 ###

#### 构建配置中心 ####

构建 config-server 9012 项目

pom 依赖

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.zk.springcloud.config</groupId>
        <artifactId>springcloud-config</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>springcloud-config</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.5.RELEASE</version>
            <relativePath/> 
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-cloud.version>Finchley.SR1</spring-cloud.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-config-server</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.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>
                </plugin>
            </plugins>
        </build>
    
    
    </project>

启动类

@SpringBootApplication
    @EnableConfigServer
    public class SpringcloudConfigApplication { 
    
        public static void main(String[] args) { 
            SpringApplication.run(SpringcloudConfigApplication.class, args);
        }
    }

配置文件

spring.application.name=config-server
    server.port=9012
    
    spring.cloud.config.server.git.uri=http://www.github.com/LJaer/zkTest.git
    spring.cloud.config.server.git.search-paths=spring_cloud_in_action/config-repo
    spring.cloud.config.server.git.username=username
    spring.cloud.config.server.git.password=123456

#### 配置规则详解 ####

spring\_cloud\_in\_action/config-repo 目录下创建四个文件

didispace.properties
    didispace-dev.properties
    didispace-test.properties
    didispace-prod.properties

文件内容分别为

from=git-default-1.0
    from=git-dev-1.0
    from=git-test-1.0
    from=git-prod-1.0

访问：[http://localhost:9012/didispace/prod/master][http_localhost_9012_didispace_prod_master] 返回

{"name":"didispace","profiles":["prod"],"label":"master","version":"921fa4b99b5b35d7aa48a4a1ab420895463c6e58","state":null,"propertySources":[{"name":"http://hcgit.hengchang6.com/zhangkai170308/zkTest.git/spring_cloud_in_action/config-repo/didispace-prod.properties","source":{"from":"git-prod-1.0"}},{"name":"http://hcgit.hengchang6.com/zhangkai170308/zkTest.git/spring_cloud_in_action/config-repo/didispace.properties","source":{"from":"git-default-1.0"}}]}

访问：[http://localhost:9012/didispace-prod.properties][http_localhost_9012_didispace-prod.properties] 返回

from: git-prod-1.0

访问： [http://localhost:9012/master/didispace-prod.properties][http_localhost_9012_master_didispace-prod.properties] 返回

from: git-prod-1.0

#### 客户端配置映射 ####

创建 config-client 9013 项目

pom 依赖

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.zk.springcloud.config</groupId>
        <artifactId>springcloud-config-client</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>springcloud-config-client</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.5.RELEASE</version>
            <relativePath/> 
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-cloud.version>Finchley.SR1</spring-cloud.version>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-config</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.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>
                </plugin>
            </plugins>
        </build>
    
    
    </project>

启动类

@SpringBootApplication
    public class SpringcloudConfigClientApplication { 
    
        public static void main(String[] args) { 
            SpringApplication.run(SpringcloudConfigClientApplication.class, args);
        }
    }

配置文件需要命名为：bootstrap.properties

spring.application.name=didispace
    server.port=9013
    
    spring.cloud.config.profile=dev
    spring.cloud.config.label=master
    spring.cloud.config.uri=http://localhost:9012/

访问：[http://localhost:9013/from][http_localhost_9013_from] 获得 git-dev-1.0

### Git 配置仓库 ###

使用本地仓库，脱离 Git 服务端

spring.cloud.config.server.git.uri=file://${user.home}/config-repo

$\{user.home\} 代表当前用户的所属目录

### 本地仓库 ###

指定一个固定的位置存储

spring.cloud.config.server.git.basedir=
    spring.cloud.config.server.svn.basedir=

### 属性覆盖 ###

加载 config 9012 项目里

spring.cloud.config.server.overrides.name=didi
    spring.cloud.config.server.overrides.from=shanghai

访问 [http://localhost:9013/from][http_localhost_9013_from] 返回 shanghai

### 安全保护 ###

config 9012 项目里添加 Spring Security 依赖

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-security</artifactId>
            </dependency>

启动后打印，生成随机秘密吗

2018-10-10 10:59:52.727  INFO 53668 --- [           main] .s.s.UserDetailsServiceAutoConfiguration : 
    
    Using generated security password: e1815bf6-2207-4b48-8dcc-219a81c6c2aa

使用自定义密码

spring.security.user.name=user
    spring.security.user.password=123456

客户端 config-client 配置如下

spring.cloud.config.username=user
    spring.cloud.config.password=123456

### 服务化配置中心 ###

config-server 9012 项目改造

添加依赖

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>

配置文件

eureka.client.service-url.defaultZone=http://localhost:9001/eureka/,http://localhost:9004/eureka/

启动类添加注解 @EnableDiscoveryClient

访问 [http://localhost:9001/][http_localhost_9001] 查看到 CONFIG-SERVER 已注册到 Eureka

config-client 9013 项目改造

添加依赖

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>

配置文件，在 bootstrap.properties

eureka.client.service-url.defaultZone=http://localhost:9001/eureka/,http://localhost:9004/eureka/
    #直接访问配置中心
    #spring.cloud.config.profile=dev
    #spring.cloud.config.label=master
    #spring.cloud.config.uri=http://localhost:9012/
    
    eureka.client.service-url.defaultZone=http://localhost:9001/eureka/,http://localhost:9004/eureka/
    
    #通过注册中心访问配置中心	
    spring.cloud.config.discovery.enabled=true
    spring.cloud.config.discovery.service-id=CONFIG-SERVER

启动类添加注解 @EnableDiscoveryClient

访问 [http://localhost:9001/][http_localhost_9001] 查看到 DIDISPACE 已注册到 Eureka

访问 [http://localhost:9013/from][http_localhost_9013_from] 可以获得 shanghai

### 失败快速响应与重试 ###

当 config-server 9012 服务关闭下，config-client 失败快速响应

在 config-client 9013 配置文件 bootstrap.properties 添加如下配置

spring.cloud.config.fail-fast=true

在未配置该属性之前，不启动 config-server 9012 ,直接启动 config-client 9013 打印一堆其他加载内容和报错

2018-10-10 15:32:25.796 ERROR 52624 --- [           main] o.s.boot.SpringApplication               : Application run failed
    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.testController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'from' in value "${from}"

加上该属性后，重试，加载内容变少，快速响应失败

2018-10-10 15:34:39.677 ERROR 35584 --- [           main] o.s.boot.SpringApplication               : Application run failed
    java.lang.IllegalStateException: Could not locate PropertySource and the fail fast property is set, failing

重试

spring.cloud.config.fail-fast=true

该配置开启的前提下，客户端 config-client 9013 添加如下依赖

<dependency>
                <groupId>org.springframework.retry</groupId>
                <artifactId>spring-retry</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-aop</artifactId>
            </dependency>

重启 config-client 9013 连接 config-server 失败后，会进行重试

可以自定义

#重试间隔时间，默认为 1000 毫秒
    spring.cloud.config.retry.multiplier=
    #下一次间隔的乘数，默认1.1
    spring.cloud.config.retry.initial-interval=
    #最大间隔时间，默认 2000 毫秒
    spring.cloud.config.retry.max-interval=
    #最大尝试次数，默认6
    spring.cloud.config.retry.max-attempts=

### 动态刷新配置 ###

[Spring Boot 2.0 迁移指南][Spring Boot 2.0]

[Spring Cloud系列（二） 应用监控与管理Actuator][Spring Cloud_ _Actuator]

config-server 9012 配置文件注释，并且开启 actuator 下其他路径

#spring.cloud.config.server.overrides.name=didi
    #spring.cloud.config.server.overrides.from=shanghai
    management.endpoints.web.exposure.include=*

添加 pom 依赖

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
                <version>2.0.2.RELEASE</version>
            </dependency>

添加 @RefreshScope 注解

@RestController
    @RefreshScope
    public class TestController {
    
        @Value("${from}")
        private String from;
    
        @GetMapping("/from")
        public String from(){
            return this.from;
        }
    
    }

访问 [http://localhost:9013/from][http_localhost_9013_from] 获得 git-default-1.0

修改 git 上 git-default-1.0 为 git-default-2.0 ，再访问 [http://localhost:9013/from][http_localhost_9013_from] 获得 git-default-1.0

POST 方式访问 [http://localhost:9013/actuator/refresh][http_localhost_9013_actuator_refresh] 会返回 \[“config.client.version”,“from”\]

访问 [http://localhost:9013/from][http_localhost_9013_from] 获得 git-default-2.0

[http_localhost_9012_didispace_prod_master]: http://localhost:9012/didispace/prod/master
[http_localhost_9012_didispace-prod.properties]: http://localhost:9012/didispace-prod.properties
[http_localhost_9012_master_didispace-prod.properties]: http://localhost:9012/master/didispace-prod.properties
[http_localhost_9013_from]: http://localhost:9013/from
[http_localhost_9001]: http://localhost:9001/
[Spring Boot 2.0]: https://blog.csdn.net/tzs_1041218129/article/details/79514845
[Spring Cloud_ _Actuator]: https://blog.csdn.net/WYA1993/article/details/80540981
[http_localhost_9013_actuator_refresh]: http://localhost:9013/actuator/refresh