Java架构师-容器化（一）：服务容器化技术-Docker、Cloud Foundry

冷不防 2023-10-04 15:10 76阅读 0赞

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## 一、服务容器化概述 ##

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### 1、应用的种类太多，码头林立 ###

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### 2、微服务 ###

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### 3、康威定律 ###

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## 二、容器技术对比：Docker 与 Cloud Foundry ##

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## 三、Docker能做什么 ##

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## 四、Docker Client/Server 架构 ##

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### 1、客户端 ###

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### 2、服务器 ###

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### 3、镜像仓库 ###

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### 4、镜像 ###

#### 4.1 生成自定义的Docker镜像【docker commit】 ####

![在这里插入图片描述][20210606153127457.png_pic_center]  
可以发布到私有仓库货公有仓库。

#### 4.2 构建文件【利用自定义的Dockerfile文件，使用docker build命令构建新镜像】 ####

![在这里插入图片描述][20210606153310454.png_pic_center]  
在已有镜像的基础上添加新功能

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### 5、容器 ###

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## 五、Linux部署并使用Docker ##

### 1、安装Docker ###

依次运行以下命令添加yum源

yum update
    yum install epel-release -y
    yum clean all
    yum list

安装并运行Docker。

yum install docker-io -y
    systemctl start docker

检查安装结果。

docker info

出现以下说明信息则表明安装成功。  
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### 2、Docker基本命令 ###

#### 2.1 镜像命令 ####

列出镜像列表

$ docker images
    $ docker image ls -a

运行 Docker 镜像（守护态方式）

$ docker run -d {镜像名}

删除指定 Docker 镜像

$ docker  image rm {镜像名}

删除 Docker 虚悬镜像

$ docker image prune

#### 2.2 Docker 容器命令 ####

列出正在运行的容器

$ docker ps -a

列出所有容器（包括已停止容器）

$ docker ps -l

进入运行中的 Docker 容器

$ docker exec -it {容器ID} /bin/bash

停止 Docker 容器

$ docker stop {容器ID}

删除指定 Docker 容器

$ docker rm -f {容器ID}

删除停止的 Docker 容器

$ docker container prune

查看 Docker 容器历史运行日志

$ docker logs {容器名}

实时监听 Docker 容器运行日志

$ docker logs -f {容器名}

#### 2.3 Docker 数据卷命令 ####

创建 Docker 数据卷

$ docker volume create {数据卷名}

列出所有 Docker 数据卷

$ docker volume ls

删除指定 Docker 数据卷

$ docker volume rm {数据卷名}

删除未关联（失效） Docker 数据卷

$ docker volume prune
    $ docker volume rm $(docker volume ls -qf dangling=true)

#### 2.4 Docker 文件操作命令 ####

从主机复制文件到 Docker 容器中

$ sudo docker cp {主机内文件路径} {容器ID}:{容器内文件存储路径}

从 Docker 容器中复制文件到主机中

$ sudo docker cp {容器ID}:{容器内文件路径} {主机内文件存储路径}

#### 2.5 其他 ####

搜索镜像：docker search xxx

docker search rabbitmq:management

列出当前系统存在的镜像

docker images

拉取镜像

docker pull xxx

xxx是具体某个镜像名称(格式 REPOSITORY:TAG)，REPOSITORY：表示镜像的仓库源,TAG：镜像的标签

docker pull rabbitmq:management

设置开机自启动

systemctl enable docker

启动Docker

systemctl start docker

运行一个容器：

docker run -d --name "xdclass_mq" -p 5672:5670 -p 5673:5670 rabbitmq:management

1.  5672:5670-------前面的端口是宿主机的端口，后面的端口是docker容器的端口
2.  5673:15670----前面的端口是宿主机的端口，后面的端口是docker容器的端口
3.  上面写的两对端口映射，前面的2个端口都是宿主机的端口，所以不能相同；后面的2个端口都是各个容器各自的端口，可以相同。
    
        docker run - 运行一个容器
         -d 后台运行
         --name "xxx"
         -p 端口映射
         rabbitmq:management  (格式 REPOSITORY:TAG)，如果不指定tag，默认使用最新的

检查容器内部信息：

docker inspect 容器名称

*  停止某个容器：docker stop 容器名称
 *  启动某个容器：docker start 容器名称
 *  移除某个容器： docker rm 容器名称 （容器必须是停止状态）

## 六、镜像改造-Dockerfile应用【站在巨人肩膀上】 ##

找一个最接近自己需求的基础镜像，在此基础上再添加自己的功能。

*  先创建一个Dockerfile文件
 *  运行`docker build -t mysh .`命令（最后的`.`表示Dockerfile所在位置，mysh表示生产的镜像名称）  
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## 七、Docker网络通信 ##

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### 1、默认网络 ###

#### 1.1 默认none网络 ####

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#### 1.2 默认host网络 ####

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#### 1.3 默认bridge网络 ####

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### 2、自定义网络 ###

#### 2.1 自定义bridge网络 ####

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#### 2.2 自定义overlay网络 ####

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#### 2.3 自定义macvlan网络 ####

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### 3、第三方网络 ###

#### 3.1 第三方flannel网络 ####

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#### 3.2 第三方weave网络 ####

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#### 3.3 第三方calico网络 ####

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--------------------

参考资料：  
[生产中的NLP：创建Docker镜像][NLP_Docker]  
[基于Docker的Python开发][Docker_Python]

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[NLP_Docker]: https://panchuangai.blog.csdn.net/article/details/108877805
[Docker_Python]: https://panchuangai.blog.csdn.net/article/details/108988455