Docker案例

关闭防火墙

# 关闭防火墙
systemctl stop firewalld.service
# 禁止防火墙开机启动
systemctl disable firewalld.service

启动或重启docker

# 启动docker
systemctl start docker

# 重启docker
systemctl restart docker

redis

加载镜像

docker load < redis-docker-image.gz

启动容器

docker run -d --name redis7000 -p 7000:6379 redis

jedis 连接测试

新建测试项目

pom.xml

添加 redis 和 junit 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.tedu</groupId>
  <artifactId>docker</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <dependencies>
  	<dependency>
  		<groupId>redis.clients</groupId>
  		<artifactId>jedis</artifactId>
  		<version>2.9.0</version>
  	</dependency>
  	<dependency>
  		<groupId>junit</groupId>
  		<artifactId>junit</artifactId>
  		<version>4.12</version>
  	</dependency>
  </dependencies>
</project>

编写测试类

package docker;

import org.junit.Test;
import redis.clients.jedis.Jedis;

public class Test1 {
	@Test
	public void test1() {
		Jedis j = new Jedis("192.168.64.150", 7000);
		j.set("key1", "value1");
		
		String v = j.get("key1");
		System.out.println(v);
		
		j.close();
	}
}

在容器中查看数据

# 进入容器
docker exec -it redis7000 bash

# 运行redis客户端工具
redis-cli

127.0.0.1:6379> keys *
1) "key1"
127.0.0.1:6379> get key1
"value1"

启动多个 redis 容器

启动三个redis容器,将端口分别映射到7000,7001和7002端口

# 如果7000已经启动,不必重复启动
docker run -d --name redis7000 -p 7000:6379 redis

docker run -d --name redis7001 -p 7001:6379 redis
docker run -d --name redis7002 -p 7002:6379 redis

# 查看容器
docker ps -a

[root@localhost ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
756f5227dd64        redis               "docker-entrypoint.s…"   6 seconds ago       Up 4 seconds        0.0.0.0:7001->6379/tcp   redis7001
bc87e35664c8        redis               "docker-entrypoint.s…"   13 seconds ago      Up 11 seconds       0.0.0.0:7002->6379/tcp   redis7002
c3700e3e4c73        redis               "docker-entrypoint.s…"   2 hours ago         Up 2 hours          0.0.0.0:7000->6379/tcp   redis7000

jedis 分片测试

编写测试方法

	@Test
	public void test2() {
		JedisPoolConfig cfg = new JedisPoolConfig();
		cfg.setMaxTotal(500);
		cfg.setMaxIdle(20);
		
		List<JedisShardInfo> shards = new ArrayList<JedisShardInfo>();
		shards.add(new JedisShardInfo("192.168.64.150", 7000));
		shards.add(new JedisShardInfo("192.168.64.150", 7001));
		shards.add(new JedisShardInfo("192.168.64.150", 7002));
		
		ShardedJedisPool pool = new ShardedJedisPool(cfg, shards);
		
		ShardedJedis j = pool.getResource();
		for (int i = 0; i < 100; i++) {
			j.set("key"+i, "value"+i);
		}
		
		pool.close();
	}

在容器中查看数据

分别进入三个redis容器,执行 keys *查看结果

docker exec -it redis7000 redis-cli
docker exec -it redis7001 redis-cli
docker exec -it redis7002 redis-cli

容器互联

创建docker虚拟网络

docker network create --subnet=172.18.0.0/24 dockernet

ifconfig

mysql

加载 mariadb 镜像

docker load < mariadb-docker-image.gz

创建数据卷

docker volume create mysql-data

启动 mariadb 容器,并挂载数据卷

docker run -d --name mysql --net dockernet --ip 172.18.0.11 -v mysql-data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=root -p 3306:3306 mariadb

docker ps -a

docker inspect mysql

进入容器,登录mysql测试

docker exec -it mysql bash

mysql -uroot -p

连接数据库,导入数据

选择 资料/docker/EasyMall/easymall.sql

tomcat

加载 tomcat 镜像

docker load < tomcat7-docker-image.gz

docker image ls

启动 tomcat 容器

docker run -d --name tomcat --net dockernet --ip 172.18.0.12 -v /opt/webapps:/usr/tomcat/webapps -p 8080:8080 tomcat:7

访问测试