分布式配置管理--百度disconf搭建过程和详细使用

先说官方文档:http://disconf.readthedocs.io/zh_CN/latest/index.html

不管是否要根据官方文档来搭建disconf,都应该看一下这一份文档.精炼清晰地介绍了disconf的功能和其他一些包含的东西.看完至少对disconf已经有了大概的了解

• disconf: https://github.com/knightliao/disconf(管理端)
• demos: https://github.com/knightliao/disconf-demos-java(客户端)
• wiki: https://github.com/knightliao/disconf/wiki(wiki)

我搭建的页面:

开始步骤吧:

• 安装Mysql（Ver 14.12 Distrib 5.0.45, for unknown-linux-gnu (x86_64) using EditLine wrapper）
• 安装Tomcat（apache-tomcat-7.0.50）
• 安装Nginx（nginx/1.5.3）
• 安装 zookeeeper （zookeeper-3.3.0）
• 安装 Redis （2.4.5）

其中安装redis和nginx稍微麻烦一些,参考:

　　http://www.cnblogs.com/garfieldcgf/p/6438898.html

　　http://www.cnblogs.com/garfieldcgf/p/6438814.html

开始配置:

将你的配置文件放到此地址目录下（以下地址可自行设定）：

/home/work/dsp/disconf-rd/online-resources

我的路径与这个不同,为了避免引起不必要的贴图错误,按照官方的来

拷贝/disconf-web/profile/rd/目录下的文件，拷贝过去后修改即可。

配置文件包括

- jdbc-mysql.properties (数据库配置)
- redis-config.properties (Redis配置，主要用于web登录使用)
- zoo.properties (Zookeeper配置)
- application.properties (应用配置）

cp application-demo.properties application.properties

注意，即使只有一个redis，也应该配置两个redis client，否则将造成内部错误。*

设置War包将要被部署的地址（以下地址可自行设定）：

/home/work/dsp/disconf-rd/war

构建

ONLINE_CONFIG_PATH=/home/work/dsp/disconf-rd/online-resources
WAR_ROOT_PATH=/home/work/dsp/disconf-rd/war
export ONLINE_CONFIG_PATH
export WAR_ROOT_PATH
cd disconf-web
sh deploy/deploy.sh

这样会在 /home/work/dsp/disconf-rd/war 生成以下结果：

-disconf-web.war
-html
-META-INF
-WEB-INF

还有其他的配置文件也都会在这个目录下

上线前的初始化工作

初始化数据库：

可以参考 sql/readme.md 来进行数据库的初始化。注意顺序执行

0-init_table.sql

1-init_data.sql

201512/20151225.sql

20160701/20160701.sql

里面默认有6个用户（请注意线上环境删除这些用户以避免潜在的安全问题）

name	pwd
admin	admin
testUser1	MhxzKhl9209
testUser2	MhxzKhl167
testUser3	MhxzKhl783
testUser4	MhxzKhl8758
testUser5	MhxzKhl112

如果想自己设置初始化的用户名信息，可以参考代码来自己生成用户：

src/main/java/com/baidu/disconf/web/tools/UserCreateTools.java

部署War

修改server.xml文件，在Host结点下设定Context：

<Context path="" docBase="/home/work/dsp/disconf-rd/war"></Context>

并设置端口为 8015

启动Tomcat，即可。

部署 前端

修改 nginx.conf

upstream disconf {
    server 127.0.0.1:8015;
}

server {

    listen   8081;
    server_name disconf.com;
    access_log /home/work/var/logs/disconf/access.log;
    error_log /home/work/var/logs/disconf/error.log;

    location / {
        root /home/work/dsp/disconf-rd/war/html;
        if ($query_string) {
            expires max;
        }
    }

    location ~ ^/(api|export) {
        proxy_pass_header Server;
        proxy_set_header Host $http_host;
        proxy_redirect off;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Scheme $scheme;
        proxy_pass http://disconf;
    }
}

这里的配置没有贴全,有些人可能会配错.我贴一份全的(因为对nginx不熟悉,我也遇到了一些小麻烦)

user  root;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    gzip  on;
    gzip_http_version 1.0;
    gzip_disable "MSIE [1-6].";
    gzip_types text/plain application/x-javascript text/css text/javascript application/x-httpd-php image/jpeg image/gif image/png;

upstream disconf {
    server 10.10.10.10:8015;
}

server {
    listen   8081;
    server_name disconftest.com;
    access_log /home/work/dsp/access.log;
    error_log /home/work/dsp/error.log;

    location / {
        root /home/docker/garfield/war/html;
        if ($query_string) {
            expires max;
        }
    }

    location ~ ^/(api|export) {
        proxy_pass_header Server;
        proxy_set_header Host $http_host;
        proxy_redirect off;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Scheme $scheme;
        proxy_pass http://disconf;
    }
}
}

这里我把server name改成了disconftest.com,跟application.properties里面的配置保持一样即可,

注意:

　　1.须保证日志文件的写入有权限哦,日志文件夹提前建好,否则会报错

　　2.开头是运行权限,这边因为没有用root运行会导致页面持续被拦截,报403,有遇到的人注意下

服务管理端的部署到这里就结束了,启动zookeeper,redis,tomcat,mysql和nginx就可以访问页面了,输入

http://10.10.10.10:8081/

看到如下页面就成功了:

输入admin/admin发现里面已经有一些配置,但是没有机器在运行,接下来进行客户端应用

其实git下载下来的demo直接运行就可以看到配置文件的下载了,当然要配置访问的服务端地址.这方面就不赘述了,记录一下我的两个实践

1.将xml下载到指定路径--将mybatis.xml文件从平台上下载,统一管理

先写一个简单的mybatis应用程序(打印出数据库所有用户表名称),主要类:

@Service
@Transactional
public class UserService {

    private static Logger  logger  = LogManager.getLogger(UserService.class);
    @Autowired
    private UserDao userMapper;

    public List<User> searchAll(){
        List<User> list = userMapper.findAll();
        for (User user : list) {
            System.out.println(user.getUsername());
        }
        return list;
    }
}

主函数:

/**
 * @author garfield
 * @version 2017-2-17
 */
public class DisconfDemoMain {
    private static String[] fn = null;

    // 初始化spring文档
    private static void contextInitialized() {
        fn = new String[] {"applicationContext.xml"};
    }

    /**
     * @param args
     *
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        contextInitialized();
        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext(fn);

        UserService userService = ctx.getBean("userService", UserService.class);
        while (true){
            userService.searchAll();
            Thread.sleep(10000);
        }
    }
}

配置类:

import com.baidu.disconf.client.common.annotations.DisconfFile;
import com.baidu.disconf.client.common.annotations.DisconfUpdateService;
import com.baidu.disconf.client.common.update.IDisconfUpdate;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Service;

/**
 * Created by garfield on 2017/2/23.
 */
@Service
@Scope("singleton")
@DisconfFile(filename = "UserMapper.xml",targetDirPath = "cloud/simple/service/dao")
@DisconfUpdateService(classes = {XMLConfig.class})
public class XMLConfig implements IDisconfUpdate {

    public void reload() throws Exception {
        System.out.println("=====================================================================");
    }
}

targetDirPath是配置下载到指定的路径中,这种情况下,profile里面的disconf.enable_local_download_dir_in_class_path配置项须置为true,运行后效果如下:

输出:

16:40:47.484 [main] DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [ProxyConnection[PooledConnection[com.mysql.jdbc.JDBC4Connection@1f6f7075]]] will not be managed by Spring
16:40:47.489 [main] DEBUG c.simple.service.dao.UserDao.findAll - ==>  Preparing: select * from user
16:40:47.513 [main] DEBUG c.simple.service.dao.UserDao.findAll - ==> Parameters:
16:40:47.532 [main] DEBUG c.simple.service.dao.UserDao.findAll - <==      Total: 2
16:40:47.533 [main] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7eadb544]
username = 1
username = 2

2.第二个实例,将log4j2.xml日志配置文件统一管理

这个例子其实关键在于手动加载日志,本身实际上也是一个下载xml文件的过程

配置类:

import com.baidu.disconf.client.common.annotations.DisconfFile;
import com.baidu.disconf.client.common.annotations.DisconfUpdateService;
import com.baidu.disconf.client.common.update.IDisconfUpdate;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Service;

/**
 * Created by garfield on 2017/2/23.
 */
@Service
@Scope("singleton")
@DisconfFile(filename = "log4j2.xml")
@DisconfUpdateService(classes = {XMLConfig.class})
public class LogConfig implements IDisconfUpdate {

    public void reload() throws Exception {
        System.out.println("=====================================================================");
    }
}

下载下来之后log4j.xml文件的位置:(与工程同级)

在主函数做一个加载动作:

import cloud.simple.service.domain.UserService;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.config.Configurator;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.apache.logging.log4j.core.config.ConfigurationSource;
import java.io.File;
import java.io.FileInputStream;
import java.net.URL;

/**
 * @author garfield
 * @version 2017-2-17
 */
public class DisconfDemoMain {
    private static String[] fn = null;
    private static Logger logger;

    // 初始化spring文档
    private static void contextInitialized() {
        fn = new String[] {"applicationContext.xml"};
    }

    /**
     * @param args
     *
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        contextInitialized();
        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext(fn);

        //此处加载日志文件
        URL url=DisconfDemoMain.class.getResource("/log4j2.xml");
        System.out.println(url.getPath());
        ConfigurationSource  source = new ConfigurationSource(new FileInputStream(new File(url.getPath())),url);
        Configurator.initialize(null, source);
        logger  = LogManager.getLogger(DisconfDemoMain.class);
        UserService userService = ctx.getBean("userService", UserService.class);
        logger.info("begin to search...");
        while (true){
            userService.searchAll();
            Thread.sleep(10000);
        }
    }
}

 运行后查看一下日志文件是否生效:

2017-02-24 16:46:01,467 INFO  main (cloud.simple.service.DisconfDemoMain) - begin to search...
2017-02-24 16:46:01,820 INFO  main (cloud.simple.service.domain.UserService) - =========================
2017-02-24 16:46:01,820 INFO  main (cloud.simple.service.domain.UserService) - username = 1
2017-02-24 16:46:01,820 INFO  main (cloud.simple.service.domain.UserService) - =========================
2017-02-24 16:46:01,820 INFO  main (cloud.simple.service.domain.UserService) - username = 2

demo中还有一些其他的例子,不过看文档大概也能明白,就不说明了.

done!