docker/k8s(1)：docker安装使用

矫情吗；* 2023-02-22 05:07 20阅读 0赞

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![在这里插入图片描述][20200515113638671.jpg_pic_center]

# 依赖 #

# docker使用 #

**安装docker**  
使用yum安装最新版本docker  
`yum install docker`

**查看docker版本**

[root@localhost ~]# docker version
    Client:
     Version:         1.13.1
     API version:     1.26
     Package version: 
    Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

**下载tomcat**

[root@localhost ~]# docker pull tomcat
    Using default tag: latest
    Trying to pull repository docker.io/library/tomcat ... 
    latest: Pulling from docker.io/library/tomcat
    e9afc4f90ab0: Pull complete 
    989e6b19a265: Pull complete 
    af14b6c2f878: Pull complete 
    5573c4b30949: Pull complete 
    fb1a405f128d: Pull complete 
    612a9f566fdc: Pull complete 
    cf63ebed1142: Pull complete 
    fbb20561cd50: Pull complete 
    e99c920870d7: Pull complete 
    b7f793f2be47: Pull complete 
    Digest: sha256:81c2a95e5b1b5867229d75255abe54928d505deb81c8ff8949b61fde1a5d30a1
    Status: Downloaded newer image for docker.io/tomcat:latest
    [root@localhost ~]# docker images
    REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
    docker.io/tomcat    latest              2eb5a120304e        3 weeks ago         647 MB

`docker images`查看本地仓库有哪些镜像。

**启动tomcat**

[root@localhost ~]# docker run -d -p 80:8080 tomcat:latest
    162820979bc3ca1e9958b548ef06262ac34e2ddd9010b10ee52bfdf3a6ffca58
    [root@localhost ~]# docker ps
    CONTAINER ID        IMAGE               COMMAND             CREATED              STATUS              PORTS                  NAMES
    162820979bc3        tomcat:latest       "catalina.sh run"   About a minute ago   Up About a minute   0.0.0.0:80->8080/tcp   eloquent_spence

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZneWlidXBp_size_16_color_FFFFFF_t_70]  
上面设置了端口映射，虚拟机的80端口映射到docker容器的tomcat的8080端口。这样就可以在虚拟机外部访问docker的内容了。  
下图可以看到正常访问到tomcat了，但是不知道为何tomcat返回了404。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZneWlidXBp_size_16_color_FFFFFF_t_70 1]  
**停止容器**

[root@localhost ~]# docker stop 162820979bc3        
    162820979bc3
    [root@localhost ~]# docker ps
    CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

服务停止后就无法再访问tomcat了：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZneWlidXBp_size_16_color_FFFFFF_t_70 2]

[20200515113638671.jpg_pic_center]: https://img-blog.csdnimg.cn/20200515113638671.jpg#pic_center
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZneWlidXBp_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200701174116806.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZneWlidXBp,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZneWlidXBp_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200701174315542.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZneWlidXBp,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZneWlidXBp_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200701174605495.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZneWlidXBp,size_16,color_FFFFFF,t_70