Docker安装
- sudo yum remove docker
docker-client
docker-client-latest
docker-common
docker-latest
docker-latest-logrotate
docker-logrotate
docker-engine
- sudo yum remove -y yum-utils
- sudo yum install -y yum-utils
- sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
如果这一步报错,说尝试其他镜像的话,执行下面步骤:
- sudo yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
- 启动 systemctl start docker
- 查看docker版本 docker -v
- 查看已经下载的镜像 docker images
- 设置重启后自启动
- 设置阿里云镜像库https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors (注意:分4步执行!)
10.1 sudo mkdir -p /etc/docker
10.2 sudo tee /etc/docker/daemon.json <<-‘EOF’
{
“registry-mirrors”: [“https://71upgx1j.mirror.aliyuncs.com”]
}
EOF
10.3 sudo systemctl daemon-reload
10.4 sudo systemctl restart docker
Docker常用命令
镜像操作
查看镜像列表 docker images
拉取镜像 docker pull nginx:alpine
删除镜像 docker rmi nginx:alpine
导出镜像 docker save -o nginx-alpine.tar nginx:alpine
导入镜像 docker load -i nginx-alpine.tar
使用docker镜像启动镜像仓库服务
docker run -d -p 5000:5000 --restart always --name registry registry:2
推送本地镜像到镜像仓库中
# 将nginx:alpine 打标签 docker tag nginx:alpine 192.168.150.100:5000/nginx:alpine
docker push 192.168.150.100:5000/nginx:alpine
报错:docker默认不允许向http的仓库地址推送,需要修改配置,跳过https校验
vi /etc/docker/daemon.json
"insecure-registries": [ "192.168.150.100:5000" ]
重启docker
systemctl restart docker
再push,就成功了
容器操作
查看容器列表
## 查看运行状态的容器列表 $ docker ps ## 查看全部状态的容器列表 $ docker ps -a
启动容器
## 后台启动 $ docker run --name nginx -d nginx:alpine ## 映射端口,把容器的端口映射到宿主机中,-p <host_port>:<container_port> $ docker run --name nginx -d -p 8080:80 nginx:alpine ## 资源限制,最大可用内存500M $ docker run --memory=500m nginx:alpine
查看容器日志
## 查看全部日志 $ docker logs nginx ## 实时查看最新日志 $ docker logs -f nginx ## 从最新的100条开始查看 $ docker logs --tail=100 -f nginx
容器数据持久化
## 挂载主机目录 $ docker run --name nginx -d -v /opt:/opt nginx:alpine $ docker run --name mysql -e MYSQL_ROOT_PASSWORD=123456 -d -v /opt/mysql/:/var/lib/mysql mysql:5.7
进入容器或者执行容器内的命令
$ docker exec -ti <container_id_or_name> /bin/sh $ docker exec <container_id_or_name> hostname
主机与容器之间拷贝数据
## 主机拷贝到容器 $ echo '123'>/tmp/test.txt $ docker cp /tmp/test.txt nginx:/tmp $ docker exec -ti nginx cat /tmp/test.txt 123 ## 容器拷贝到主机 $ docker cp nginx:/tmp/test.txt ./
停止或者删除容器
## 停止运行中的容器 $ docker stop nginx ## 启动退出容器 $ docker start nginx ## 删除非运行中状态的容器 $ docker rm nginx ## 删除运行中的容器 $ docker rm -f nginx
查看容器或者镜像的明细
## 查看容器详细信息,包括容器IP地址等 $ docker inspect nginx ## 查看镜像的明细信息 $ docker inspect nginx:alpine
清掉所有容器
docker rm -f `docker ps -aq`
Docker端口映射
安装MySQL
- 下载镜像:docker pull mysql:8.0.30
- 然后查看下载的镜像
- 虚拟机的话需要设置ipv4 云服务器不需要这么做
vim /usr/lib/sysctl.d/00-system.conf
重启网络和Docker
- 启动MySQL
docker run -p 3306:3306 --name=mysql -v /home/mysql8/log:/var/log/mysql -v /home/mysql8/data:/var/lib/mysql -v /home/mysql8/mysql-files:/var/lib/mysql-files -e MYSQL_ROOT_PASSWORD=Admin~123456 -d mysql:8.0.30 --character-set-server=utf8mb4
查看docker运行的容器:docker ps
查看docker容器运行状态:docker stats (ctrl+c退出)
使用navicat可以连接了
如果docker ps没有运行的MySQL容器,那么执行docker ps -a表示查看所有容器(包括运行失败的容器,status是Exited 退出状态的)
那么这个时候需要看mysql容器日志:docker logs mysql
重新启动容器:docker start CONTAINER_ID
修改MySQL密码 进入docker bash命令
docker exec -it mysql bash
mysql -u root -p
设置远程连接
退出bash命令 Ctrl+D
让MySQL跟随系统重启的时候启动
docker update mysql --restart=always
安装Redis
docker pull redis:6.2.7
cd /home/
mkdir redis6/conf -p (-p表示递归创建文件夹)
mkdir redis6/data -p
cd /home/redis6/conf
touch redis.conf
docker run -p 6379:6379 --name=redis -v /home/redis6/data:/data -v /home/redis6/conf/redis.conf:/etc/redis/redis.conf -d redis:6.2.7 redis-server /etc/redis/redis.conf
docker ps (默认Redis没有密码)
进入bash命令使用Redis
让redis跟随系统重启的时候启动
docker update redis–restart=always
给Redis添加密码
cd /home/redis6/conf
vim redis.conf
docker restart redis
安装RabbitMQ
下载镜像:
docker pull rabbitmq:management
启动
docker run --name rabbitmq -p 5671:5671 -p 5672:5672 -p 4369:4369 -p 15671:15671 -p 15672:15672 -p 25672:25672 --restart always -d rabbitmq:management
访问登录界面
账号密码都是guest
安装Nacos
docker pull nacos/nacos-server:v2.1.1
启动nacos
docker run --name nacos -e MODE=standalone -e JVM_XMS=128m -e JVM_XMX=128m -e JVM_XMN=64m -e JVM_MS=64m -e JVM_MMS=64m -p 8848:8848 -d nacos/nacos-server:v2.1.1
安装Seata
使用docker安装seata前提,client端(业务端)需要新增表undo_log,具体根据数据库类型来
MySQL为:
-- for AT mode you must to init this sql for you business database. the seata server not need it. CREATE TABLE IF NOT EXISTS `undo_log` ( `branch_id` BIGINT NOT NULL COMMENT 'branch transaction id', `xid` VARCHAR(128) NOT NULL COMMENT 'global transaction id', `context` VARCHAR(128) NOT NULL COMMENT 'undo_log context,such as serialization', `rollback_info` LONGBLOB NOT NULL COMMENT 'rollback info', `log_status` INT(11) NOT NULL COMMENT '0:normal status,1:defense status', `log_created` DATETIME(6) NOT NULL COMMENT 'create datetime', `log_modified` DATETIME(6) NOT NULL COMMENT 'modify datetime', UNIQUE KEY `ux_undo_log` (`xid`, `branch_id`) ) ENGINE = InnoDB AUTO_INCREMENT = 1 DEFAULT CHARSET = utf8mb4 COMMENT ='AT transaction mode undo table';
seata-server端 需要新建数据库seata(这里名字要跟seata-server application.yml配置文件中store的db保持一致) 并创建下面4张表
MySQL为:
-- -------------------------------- The script used when storeMode is 'db' -------------------------------- -- the table to store GlobalSession data CREATE TABLE IF NOT EXISTS `global_table` ( `xid` VARCHAR(128) NOT NULL, `transaction_id` BIGINT, `status` TINYINT NOT NULL, `application_id` VARCHAR(32), `transaction_service_group` VARCHAR(32), `transaction_name` VARCHAR(128), `timeout` INT, `begin_time` BIGINT, `application_data` VARCHAR(2000), `gmt_create` DATETIME, `gmt_modified` DATETIME, PRIMARY KEY (`xid`), KEY `idx_status_gmt_modified` (`status` , `gmt_modified`), KEY `idx_transaction_id` (`transaction_id`) ) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4; -- the table to store BranchSession data CREATE TABLE IF NOT EXISTS `branch_table` ( `branch_id` BIGINT NOT NULL, `xid` VARCHAR(128) NOT NULL, `transaction_id` BIGINT, `resource_group_id` VARCHAR(32), `resource_id` VARCHAR(256), `branch_type` VARCHAR(8), `status` TINYINT, `client_id` VARCHAR(64), `application_data` VARCHAR(2000), `gmt_create` DATETIME(6), `gmt_modified` DATETIME(6), PRIMARY KEY (`branch_id`), KEY `idx_xid` (`xid`) ) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4; -- the table to store lock data CREATE TABLE IF NOT EXISTS `lock_table` ( `row_key` VARCHAR(128) NOT NULL, `xid` VARCHAR(128), `transaction_id` BIGINT, `branch_id` BIGINT NOT NULL, `resource_id` VARCHAR(256), `table_name` VARCHAR(32), `pk` VARCHAR(36), `status` TINYINT NOT NULL DEFAULT '0' COMMENT '0:locked ,1:rollbacking', `gmt_create` DATETIME, `gmt_modified` DATETIME, PRIMARY KEY (`row_key`), KEY `idx_status` (`status`), KEY `idx_branch_id` (`branch_id`), KEY `idx_xid_and_branch_id` (`xid` , `branch_id`) ) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4; CREATE TABLE IF NOT EXISTS `distributed_lock` ( `lock_key` CHAR(20) NOT NULL, `lock_value` VARCHAR(20) NOT NULL, `expire` BIGINT, primary key (`lock_key`) ) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4; INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('AsyncCommitting', ' ', 0); INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('RetryCommitting', ' ', 0); INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('RetryRollbacking', ' ', 0); INSERT INTO `distributed_lock` (lock_key, lock_value, expire) VALUES ('TxTimeoutCheck', ' ', 0);
下载镜像:
docker pull seataio/seata-server:1.5.2
docker run --name seata-server -p 8091:8091 -p 7091:7091 -d seataio/seata-server:1.5.2
将容器内部resources文件夹拷贝出来并修改:
mkdir /home/seata/resources -p docker cp seata-server:/seata-server/resources /home/seata/ cd /home/seata/resources vim application.yml
参考application.example.yml修改application.yml的 config,registry,store具体如下:
seata: config: # support: nacos, consul, apollo, zk, etcd3 type: nacos nacos: server-addr: 192.168.233.128:8848 namespace: group: SEATA_GROUP username: nacos password: nacos registry: # support: nacos, eureka, redis, zk, consul, etcd3, sofa type: nacos nacos: application: seata-server server-addr: 192.168.233.128:8848 group: SEATA_GROUP namespace: cluster: default username: nacos password: nacos store: # support: file 、 db 、 redis mode: db db: datasource: druid db-type: mysql driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://127.0.0.1:3306/seata?rewriteBatchedStatements=true user: root password: root min-conn: 5 max-conn: 100 global-table: global_table branch-table: branch_table lock-table: lock_table distributed-lock-table: distributed_lock query-limit: 100 max-wait: 5000
重新挂载配置文件,需要先移除容器再使用挂在配置启动容器:
docker stop seata-server docker rm seata-server docker run --name seata-server -p 8091:8091 -p 7091:7091 -v /home/seata/resources:/seata-server/resources -d seataio/seata-server:1.5.2
查看seata启动控制台 docker logs seata-server
至此,nacos上就会注册seata服务
业务端使用seata控制全局事务
依赖
<dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-seata</artifactId> <exclusions> <exclusion> <groupId>io.seata</groupId> <artifactId>seata-spring-boot-starter</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>io.seata</groupId> <artifactId>seata-spring-boot-starter</artifactId> <version>1.5.2</version> </dependency>
所有微服务配置文件需要添加
seata: enabled: true tx-service-group: imooc_tx_group service: vgroup-mapping: imooc_tx_group: SEATA_GROUP grouplist: SEATA_GROUP: 192.168.233.128:8091 config: nacos: server-addr: 192.168.233.128:8848 username: nacos password: nacos registry: nacos: server-addr: 192.168.233.128:8848 username: nacos password: nacos
调用方serviceImpl方法上添加 @GlobalTransactional,并且一旦远程调用失败,则手动回滚全局事务
// 发起远程调用,初始化用户简历,新增一条空记录 GraceJSONResult graceJSONResult = workMicroServiceFeign.init(user.getId()); if (graceJSONResult.getStatus() != 200) { // 如果调用状态不是200,则手动回滚全局事务 String xid = RootContext.getXID(); if (StringUtils.isNotBlank(xid)) { try { GlobalTransactionContext.reload(xid).rollback(); } catch (TransactionException e) { e.printStackTrace(); } finally { GraceException.display(ResponseStatusEnum.USER_REGISTER_ERROR); } } }
或者使用切面来控制全局事务
package com.imooc.api; import io.seata.core.context.RootContext; import io.seata.core.exception.TransactionException; import io.seata.tm.api.GlobalTransaction; import io.seata.tm.api.GlobalTransactionContext; import lombok.extern.slf4j.Slf4j; import org.apache.commons.lang3.StringUtils; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.AfterThrowing; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.springframework.stereotype.Component; @Slf4j @Component @Aspect public class SeataTransactionAspect { /** * 调用service之前,手动加入或者创建全局事务 * @param joinPoint * @throws TransactionException */ @Before("execution(* com.imooc.service.impl..*.*(..))") public void beginTransaction(JoinPoint joinPoint) throws TransactionException { log.info("手动开启全局事务"); // 手动开启全局事务 GlobalTransaction gt = GlobalTransactionContext.getCurrentOrCreate(); gt.begin(); } /** * 捕获异常,则手动回滚全局事务 * @param throwable * @throws Throwable */ @AfterThrowing( throwing = "throwable", pointcut = "execution(* com.imooc.service.impl..*.*(..))" ) public void seataRollback(Throwable throwable) throws Throwable { log.info("捕获到异常信息,则回滚,异常信息为:" + throwable.getMessage()); // 从当前线程获得xid String xid = RootContext.getXID(); if (StringUtils.isNotBlank(xid)) { GlobalTransactionContext.reload(xid).rollback(); } } }
安装MINIO
docker pull minio/minio
mkdir /home/minio/data -p
cd /home/minio
docker run --name minio -p 9000:9000 -p 9090:9090 -d --restart=always -e "MINIO_ROOT_USER=imooc" -e "MINIO_ROOT_PASSWORD=imooc123456" -v /home/minio/data:/data minio/minio server /data --console-address ":9090" -address ":9000"
通过访问:192.168.233.128:9090 可以访问minio客户端