《专题五容器化微服务》之《第二章容器化技术》之《第一节 Docker容器》

太过爱你忘了你带给我的痛 2023-10-05 19:46 17阅读 0赞

#### 文章目录 ####

*  《2.1.1 docker介绍及使用》
 *  《2.1.2 docker 的存储和网络》
 *  《2.1.3 docker 实践》

## 《2.1.1 docker介绍及使用》 ##

*  3分 概念：  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70]
 *  虚拟机 vs 容器:  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70 1]
 *  12 7 docker服务架构
 *  12 40 Docker：Build,Ship,Run  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70 2]
 *  13 50 Docker安装：按官网上的[Install Docker Engine on CentOS][]。Start Docker：`sudo systemctl start docker`
 *  Docker启停容器等命令：  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70 3]  
    ![在这里插入图片描述][3064afe542054477ac1a408bc2ff91a4.png]

我实验用的命令，以及结果（部分）：

docker images
    
    REPOSITORY    TAG       IMAGE ID       CREATED         SIZE
    hello-world   latest    bf756fb1ae65   13 months ago   13.3kB

docker create --name test hello-world
    
    3a68df3746346a7942a13903083927780ff0a5eaff950dba6853de18f6b20c41

docker ps -a
    
    CONTAINER ID   IMAGE         COMMAND    CREATED              STATUS                   PORTS     NAMES
    3a68df374634   hello-world   "/hello"   About a minute ago   Created                            test
    ced7b419db32   hello-world   "/hello"   3 hours ago          Exited (0) 3 hours ago             trusting_rosalind

docker start test

docker logs test

docker stop test

又如`docker create --name testRedis hub.c.163.com/public/redis:2.8.4`后，`docker ps -a`：

> CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES  
> b4ac0866bd98 hub.c.163.com/public/redis:2.8.4 “/run.sh” 48 seconds ago Created  testRedis  
> ed7a89668594 hello-world “/hello” 11 minutes ago Exited(0) 8 minutes ago test  
> d0fb817256c1 hello-world “/hello” 18 minutes ago Exited (0) 18 minutes ago flamboyant\_ramanujan  
> 90f794425930 hello-world “/hello” 18 minutes ago Exited (0) 18 minutes ago unruffled\_wozniak

docker start testRedis
    docker ps -a
    CONTAINER ID   IMAGE                              COMMAND     CREATED          STATUS                      PORTS      NAMES
    b4ac0866bd98   hub.c.163.com/public/redis:2.8.4   "/run.sh"   8 minutes ago    Up 36 seconds               6379/tcp   testRedis
    ed7a89668594   hello-world                        "/hello"    19 minutes ago   Exited (0) 16 minutes ago              test
    d0fb817256c1   hello-world                        "/hello"    26 minutes ago   Exited (0) 26 minutes ago              flamboyant_ramanujan
    90f794425930   hello-world                        "/hello"    26 minutes ago   Exited (0) 26 minutes ago              unruffled_wozniak

查看其日志：`docker logs testRedis`

*  22 20 docker容器状态转化：  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70 4]
 *  23 50 Docker容器隔离
 *  28 19+ Docker对容器的资源使用限制
 *  36 32+ Docker容器的进程与容器状态  
    ![在这里插入图片描述][d9efdf015d42474c8fd0342c2e8bdc7d.png]
 *  39 45+ 如何制作docker镜像
 *   *  docker镜像是什么：  
        ![在这里插入图片描述][48ec2296b6d44c268329c3b821d900ac.png]
 *   *  41 43+ Dockerfile镜像制作示例:  
        ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70 5]
 *   *  48 12+ Docker镜像分发
 *   *  66 53+ Dockerfile常用指令
 *   *  69 40 如何优雅地写Dockerfilie:  
        ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70 6]  
        docker应尽量做到专一，多个docker可通过组合来完成复杂功能，可秒级部署且更灵活

## 《2.1.2 docker 的存储和网络》 ##

*  9:30 docker volume 容器数据卷：  
    ![在这里插入图片描述][bddd1609249342908e2d2d960edd5ad4.png]
 *  12 54+ docker容器如何与宿主机共享数据  
    ![在这里插入图片描述][d5ce712033164de88cc3189e5a4370f7.png]
 *   *  19 32 Docker的volume模块。我：volumeName相当于卷的变量，本质是对上图的hostPath的封装。卷的生命周期和容器的生命周期是独立的  
        ![在这里插入图片描述][a33439aa99944836a2f4a78acbf32933.png]
 *   *  25 49+ Docker高速存储卷
 *   *  27 21 docker三种卷共享方式的比较  
        ![在这里插入图片描述][5d403fa558374964afce7b5edb8d506f.png]
 *  29 1+ Docker容器的网络：
 *   *  32 21+ 容器网络的隔离沙箱：net namespace
 *   *  34 30 两个容器如何网络互通：  
        ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70 7]
 *   *  40 13+ 多容器如何网络互通
 *   *  43 37 Docker Bridge模式
 *  53 17+ 容器跨节点间通信

## 《2.1.3 docker 实践》 ##

*  9 9 容器化改造流程
 *  56 16 日志和监控查看：  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70 8]
 *  60 44 升级和故障迁移
 *  63 30 容器编排调度：  
    ![在这里插入图片描述][976cd56d192c46bf934f124259be2434.png]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20210216150812245.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3,size_16,color_FFFFFF,t_70
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[Install Docker Engine on CentOS]: https://docs.docker.com/engine/install/centos/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20210216230710739.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIzMjA0NTU3,size_16,color_FFFFFF,t_70
[3064afe542054477ac1a408bc2ff91a4.png]: https://img-blog.csdnimg.cn/3064afe542054477ac1a408bc2ff91a4.png
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