Spring Cloud: Apollo配置中心的使用

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wx62e0d796b5814 2023-01-07 00:15:44 博主文章分类：SpringCloud ©著作权

文章标签 spring cloud java spring JAVA 文章分类 运维

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一、下载Apollo 2.0.0压缩包,并创建2个数据库：
ApolloPortalDB
ApolloConfigDB
然后分别导入压缩包中sql子目录中的sql文件到数据库
二、修改压缩包中的demo.sh,主要包括数据库的配置等，示例如下：（里边的ip地址尽量使用外网地址，方便进行远程测试）

#!/bin/bash

# handle env
if [[ -n "$JAVA_OPTS" ]]; then
  echo JAVA_OPTS = $JAVA_OPTS
fi

if [[ -n "$APOLLO_CONFIG_DB_USERNAME" ]]; then
  echo APOLLO_CONFIG_DB_USERNAME = "$APOLLO_CONFIG_DB_USERNAME"
fi

if [[ -n "$APOLLO_CONFIG_DB_PASSWORD" ]]; then
  echo APOLLO_CONFIG_DB_PASSWORD = "${APOLLO_CONFIG_DB_PASSWORD//?/*}"
fi

if [[ -n "$APOLLO_PORTAL_DB_USERNAME" ]]; then
  echo APOLLO_PORTAL_DB_USERNAME = "$APOLLO_PORTAL_DB_USERNAME"
fi

if [[ -n "$APOLLO_PORTAL_DB_PASSWORD" ]]; then
  echo APOLLO_PORTAL_DB_PASSWORD = "${APOLLO_PORTAL_DB_PASSWORD//?/*}"
fi

# apollo config db info
apollo_config_db_url="jdbc:mysql://localhost:3306/ApolloConfigDB?characterEncoding=utf8&serverTimezone=Asia/Shanghai&useSSL=false"
apollo_config_db_username=root
apollo_config_db_password=yourpassword

# apollo portal db info
apollo_portal_db_url="jdbc:mysql://localhost:3306/ApolloPortalDB?characterEncoding=utf8&serverTimezone=Asia/Shanghai&useSSL=false"
apollo_portal_db_username=root
apollo_portal_db_password=yourpassword

# =============== Please do not modify the following content =============== #

if [ "$(uname)" == "Darwin" ]; then
    windows="0"
elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
    windows="0"
elif [ "$(expr substr $(uname -s) 1 5)" == "MINGW" ]; then
    windows="1"
else
    windows="0"
fi

# meta server url
config_server_url=http://139.xxx.xxx.xxx:8080
admin_server_url=http://139.xxx.xxx.xxx:8090
eureka_service_url=$config_server_url/eureka/
portal_url=http://localhost:8070

# JAVA OPTS
BASE_JAVA_OPTS="$JAVA_OPTS -Denv=dev"
CLIENT_JAVA_OPTS="$BASE_JAVA_OPTS -Dapollo.meta=$config_server_url"
SERVER_JAVA_OPTS="$BASE_JAVA_OPTS -Dspring.profiles.active=github -Deureka.service.url=$eureka_service_url"
PORTAL_JAVA_OPTS="$BASE_JAVA_OPTS -Ddev_meta=$config_server_url -Dspring.profiles.active=github,auth -Deureka.client.enabled=false -Dhibernate.query.plan_cache_max_size=192"

# executable
JAR_FILE=apollo-all-in-one.jar
SERVICE_DIR=./service
SERVICE_JAR_NAME=apollo-service.jar
SERVICE_JAR=$SERVICE_DIR/$SERVICE_JAR_NAME
SERVICE_LOG=$SERVICE_DIR/apollo-service.log
PORTAL_DIR=./portal
PORTAL_JAR_NAME=apollo-portal.jar
PORTAL_JAR=$PORTAL_DIR/$PORTAL_JAR_NAME
PORTAL_LOG=$PORTAL_DIR/apollo-portal.log
CLIENT_DIR=./client
CLIENT_JAR=$CLIENT_DIR/apollo-demo.jar

# go to script directory
cd "${0%/*}"

function checkJava {
  if [[ -n "$JAVA_HOME" ]] && [[ -x "$JAVA_HOME/bin/java" ]];  then
      if [ "$windows" == "1" ]; then
        tmp_java_home=`cygpath -sw "$JAVA_HOME"`
        export JAVA_HOME=`cygpath -u "$tmp_java_home"`
        echo "Windows new JAVA_HOME is: $JAVA_HOME"
      fi
      _java="$JAVA_HOME/bin/java"
  elif type -p java > /dev/null; then
    _java=java
  else
      echo "Could not find java executable, please check PATH and JAVA_HOME variables."
      exit 1
  fi

  if [[ "$_java" ]]; then
      version=$("$_java" -version 2>&1 | awk -F '"' '/version/ {print $2}')
      if [[ "$version" < "1.8" ]]; then
          echo "Java version is $version, please make sure java 1.8+ is in the path"
          exit 1
      fi
  fi
}

function checkServerAlive {
  declare -i counter=0
  declare -i max_counter=24 # 24*5=120s
  declare -i total_time=0

  SERVER_URL="$1"

  until [[ (( counter -ge max_counter )) || "$(curl -X GET --silent --connect-timeout 1 --max-time 2 --head $SERVER_URL | grep "HTTP")" != "" ]];
  do
    printf "."
    counter+=1
    sleep 5
  done

  total_time=counter*5

  if [[ (( counter -ge max_counter )) ]];
  then
    return $total_time
  fi

  return 0
}

checkJava

if [ "$1" = "start" ] ; then
  echo "==== starting service ===="
  echo "Service logging file is $SERVICE_LOG"
  export APP_NAME="apollo-service"
  export JAVA_OPTS="$SERVER_JAVA_OPTS -Dlogging.file.name=./apollo-service.log -Dspring.datasource.url=$apollo_config_db_url -Dspring.datasource.username=$apollo_config_db_username -Dspring.datasource.password=$apollo_config_db_password -Deureka.instance.ip-address=139.xxx.xxx.xxx"

  if [[ -f $SERVICE_JAR ]]; then
    rm -rf $SERVICE_JAR
  fi

  ln $JAR_FILE $SERVICE_JAR
  chmod a+x $SERVICE_JAR

  $SERVICE_JAR start --configservice --adminservice

  rc=$?
  if [[ $rc != 0 ]];
  then
    echo "Failed to start service, return code: $rc. Please check $SERVICE_LOG for more information."
    exit $rc;
  fi

  printf "Waiting for config service startup"
  checkServerAlive $config_server_url

  rc=$?
  if [[ $rc != 0 ]];
  then
    printf "\nConfig service failed to start in $rc seconds! Please check $SERVICE_LOG for more information.\n"
    exit 1;
  fi

  printf "\nConfig service started. You may visit $config_server_url for service status now!\n"

  printf "Waiting for admin service startup"
  checkServerAlive $admin_server_url

  rc=$?
  if [[ $rc != 0 ]];
  then
    printf "\nAdmin service failed to start in $rc seconds! Please check $SERVICE_LOG for more information.\n"
    exit 1;
  fi

  printf "\nAdmin service started\n"

  echo "==== starting portal ===="
  echo "Portal logging file is $PORTAL_LOG"
  export APP_NAME="apollo-portal"
  export JAVA_OPTS="$PORTAL_JAVA_OPTS -Dlogging.file.name=./apollo-portal.log -Dserver.port=8070 -Dspring.datasource.url=$apollo_portal_db_url -Dspring.datasource.username=$apollo_portal_db_username -Dspring.datasource.password=$apollo_portal_db_password"

  if [[ -f $PORTAL_JAR ]]; then
    rm -rf $PORTAL_JAR
  fi

  ln $JAR_FILE $PORTAL_JAR
  chmod a+x $PORTAL_JAR

  $PORTAL_JAR start --portal

  rc=$?
  if [[ $rc != 0 ]];
  then
    echo "Failed to start portal, return code: $rc. Please check $PORTAL_LOG for more information."
    exit $rc;
  fi

  printf "Waiting for portal startup"
  checkServerAlive $portal_url

  rc=$?
  if [[ $rc != 0 ]];
  then
    printf "\nPortal failed to start in $rc seconds! Please check $PORTAL_LOG for more information.\n"
    exit 1;
  fi

  printf "\nPortal started. You can visit $portal_url now!\n"

  exit 0;
elif [ "$1" = "client" ] ; then
  if [ "$windows" == "1" ]; then
    java -classpath "$CLIENT_DIR;$CLIENT_JAR" $CLIENT_JAVA_OPTS com.ctrip.framework.apollo.demo.api.SimpleApolloConfigDemo
  else
    java -classpath $CLIENT_DIR:$CLIENT_JAR $CLIENT_JAVA_OPTS com.ctrip.framework.apollo.demo.api.SimpleApolloConfigDemo
  fi

elif [ "$1" = "stop" ] ; then
  echo "==== stopping portal ===="
  export APP_NAME="apollo-portal"
  cd $PORTAL_DIR
  ./$PORTAL_JAR_NAME stop

  cd ..

  echo "==== stopping service ===="
  export APP_NAME="apollo-service"
  cd $SERVICE_DIR
  ./$SERVICE_JAR_NAME stop

else
  echo "Usage: demo.sh ( commands ... )"
  echo "commands:"
  echo "  start         start services and portal"
  echo "  client        start client demo program"
  echo "  stop          stop services and portal"
  exit 1
fi

四、运行demo.sh,等待Apollo启动完成。Apollo 2.0默认需要Eureka的支持，因此，它会默认在8080端口启动一个Eureka Server.
启动完成后输入ip:8070,使用默认用户
apollo
admin
进行登录
五、然后在apollo配置中心创建配置：
1创建项目:例如beidou
2.创建namespace,例如k3
3.创建配置并Release配置：例如birthday=2022
六、创建Spring Boot项目，并引入apollo相关依赖

<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>cn.edu.tju</groupId>
  <artifactId>apollo-springboot</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>apollo-springboot</name>
  <url>http://maven.apache.org</url>


  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.6.RELEASE</version>
  </parent>
  
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
          <groupId>com.ctrip.framework.apollo</groupId>
          <artifactId>apollo-client</artifactId>
          <version>1.1.0</version>
      </dependency>
      <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>
  
  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
  
</project>

七、在application.properties中配置apollo相关参数

server.port=8089
app.id=beidou
apollo.meta=http://139.xxx.xxx.xxx:8080
apollo.bootstrap.enabled=true
apollo.bootstrap.namespaces=k3

八、在controller中使用配置数据(在apollo中配置的birthday)

package cn.edu.tju.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {
    @Value("${birthday}")
    private String birthday;

    @RequestMapping("/hi")
    public String hi(){
        return birthday;
    }
}

九、在配置中心修改birthday的值，重新访问/hi接口，可以看到获取到的是更改后的配置值