#Spring Cloud 中使用zookeeper作为服务注册中心与配置中心
安装zookeeper
-下载
-解压
tar -xvf zookeeper-3.4.10.tar.gz
-启动zookeeper
cd zookeeper-3.4.10
cd conf
cp zoo_sample.cfg zoo.cfg
cd ../bin
sh zkServer.sh start
使用zookeeper作为服务注册中心
maven依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zookeeper-discovery</artifactId>
</dependency>
启动类上添加注解@EnableDiscoveryClient
package com.garlic.springcloudzookeeperclientapp;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
/**
* zookeeper作为服务注册中心，应用启动类
*/
@SpringBootApplication
@EnableDiscoveryClient
public class SpringCloudZookeeperClientAppApplication {
public static void main(String[] args) {
SpringApplication.run(SpringCloudZookeeperClientAppApplication.class, args);
}
}
添加配置文件application.properties
1 配置应用名称
spring.application.name=spring-cloud-zookeeper-client-app
2 配置服务端口
server.port=8080
3 关闭安全控制
management.security.enabled=false
配置zookeeper地址
spring.cloud.zookeeper.connect-string=localhost:2181
使用DiscoveryClient获取注册服务列表
package com.garlic.springcloudzookeeperclientapp.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
/**
* 提供Rest Api，根据实例名称获取注册服务列表
*/
@RestController
@RequestMapping("/zookeeper")
public class ZookeeperController {
@Value("${spring.application.name}")
private String instanceName
private final DiscoveryClient discoveryClient;
@Autowired
public ZookeeperController(DiscoveryClient discoveryClient) {
this.discoveryClient = discoveryClient;
}
@GetMapping
public String hello() {
return "Hello,Zookeeper.";
}
@GetMapping("/services")
public List<String> serviceUrl() {
List<ServiceInstance> list = discoveryClient.getInstances(instanceName);
List<String> services = new ArrayList<>();
if (list != null && list.size() > 0 ) {
list.forEach(serviceInstance -> {
services.add(serviceInstance.getUri().toString());
});
}
return services;
}
}
注：可以启动不同的实例，此处我启动了端口8080与8081两个实例，然后使用端点可以查询到所注册的服务列表
同样可以通过zookeeper相关命令查询到说注册的服务列表
sh zkCli.sh
[services, zookeeper]
[zk: localhost:2181(CONNECTED) 1] ls /
[services, zookeeper]
[zk: localhost:2181(CONNECTED) 2] ls /services
[spring-cloud-zookeeper-client-app]
[zk: localhost:2181(CONNECTED) 3] ls /services/spring-cloud-zookeeper-client-app
[be61af3d-ffc2-4ffc-932c-26bc0f94971c, bcf21ece-e9e1-4a91-b985-8828688370b8]
[zk: localhost:2181(CONNECTED) 4]
使用zookeeper作为配置中心
- 使用zkCli创建配置信息
[zk: localhost:2181(CONNECTED) 27] create /config ""
Created /config
[zk: localhost:2181(CONNECTED) 28] create /config ""
Created /config/garlic
[zk: localhost:2181(CONNECTED) 29] create /config/garlic/name "default"
Created /config/garlic/name
[zk: localhost:2181(CONNECTED) 30] set /config/garlic-dev/name "dev"
Node does not exist: /config/garlic-dev/name
[zk: localhost:2181(CONNECTED) 31] create /config/garlic-dev/name "dev"
Created /config/garlic-dev/name
[zk: localhost:2181(CONNECTED) 32] create /config/garlic-test/name "test"
Created /config/garlic-test/name
[zk: localhost:2181(CONNECTED) 33] create /config/garlic-prod/name "prod"
添加 maven依赖
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zookeeper-config</artifactId>
</dependency>
bootstrap.properties
启用zookeeper作为配置中心
spring.cloud.zookeeper.config.enabled = true
配置根路径
spring.cloud.zookeeper.config.root = config
配置默认上下文
spring.cloud.zookeeper.config.defaultContext = garlic
配置profile分隔符
spring.cloud.zookeeper.config.profileSeparator = -
application.properties
配置应用名称
spring.application.name=spring-cloud-zookeeper-config-app
配置服务端口
server.port=10000
关闭安全控制
management.security.enabled=false
spring.profiles.active=dev
编写Controller来动态获取zookeeper配置中心的数据
package com.garlic.springcloudzookeeperconfigapp.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* 提供Rest Api，获取配置在zookeeper中的配置信息
*/
@RestController
@RequestMapping("/zookeeper")
@RefreshScope // 必须添加，否则不会自动刷新name的值
public class ZookeeperController {
@Autowired
private Environment environment;
@Value("${name}")
private String name;
@GetMapping
public String hello() {
return "Hello, " + name;
}
@GetMapping("/env")
public String test() {
String name = environment.getProperty("name");
System.out.println(name);
return "Hello," + name;
}
}
K8s 集群方案
-
单机 - 16G以上
一个主控，两个工作节点
-
单机 - 8G以上
一个主控+工作基点，一个工作节点
-
多台主机 - 4G
一台主机启动一个虚拟机，用桥接网络
配置集群环境
-
克隆 centos-7-1908： k1
-
设置 cpu 和 内存
cpu - 2
内存 - 2G
第三个方案，把网络设置成桥接网络
-
设置ip
./ip-static ip: 192.168.64.191 第三个方案，用自动获取ip ./ip-dhcp -
上传文件
- easzup、images.gz 两个文件上传到 /root/
- ansible 文件夹上传到 /etc/
-
执行以下命令
# 对easzup文件设置执行权限 chmod +x ./easzup # 下载离线安装文件,并安装配置docker, # 如果离线文件已经存在则不会重复下载, # 离线安装文件存放路径: /etc/ansible ./easzup -D # 启动kubeasz工具使用的临时容器 ./easzup -S # 进入该容器 docker exec -it kubeasz sh # 下面命令在容器内执行 # 配置离线安装 cd /etc/ansible sed -i 's/^INSTALL_SOURCE.*$/INSTALL_SOURCE: "offline"/g' roles/chrony/defaults/main.yml sed -i 's/^INSTALL_SOURCE.*$/INSTALL_SOURCE: "offline"/g' roles/ex-lb/defaults/main.yml sed -i 's/^INSTALL_SOURCE.*$/INSTALL_SOURCE: "offline"/g' roles/kube-node/defaults/main.yml sed -i 's/^INSTALL_SOURCE.*$/INSTALL_SOURCE: "offline"/g' roles/prepare/defaults/main.yml exit -
导入镜像
docker load -i images.gz