Docker基础（二）

容器数据卷

出现的意义：

数据持久化，因为容器删除后，保存在容器中的数据会丢失
方便容器与宿主机数据交互

docker数据类型：

**数据卷 ** ：相当于mount一块磁盘
数据容器：将数据保存在容器上，用于容器间共享数据，这种容器一般不跑应用，只是挂载卷

数据卷挂载分类

具名挂载

-v 卷名:容器路径
[root@master ~]# docker run -d -P -v test_volume:/etc/nginx --name="nginx_name" nginx:latest   
f7640ae90c7ec4a2514bc0bf4fb41c156c21d9e5b3ab43aabcba7ed279a9b3df
[root@master ~]# docker volume ls
DRIVER              VOLUME NAME
local               7a767141bcb3e25b07c67aaad61ffacab081d1b80937fc7b02c3184cd4706b0b
local               7727d1a368eec5721da70bf1af6121065b646a7be02d97b007e9c8b508148029
local               test_volume
[root@master ~]# docker volume inspect test_volume|grep Mountpoint
        "Mountpoint": "/var/lib/docker/volumes/test_volume/_data",

匿名挂载

-v 容器路径
[root@master ~]# docker run -d -P -v /etc/nginx --name="nginx_01" nginx:latest
c986f508b492e8327a0916c54f824f2f46490f50674fd0ef6c2303d369a304ad

没有指定宿主机目录的，一般默认宿主机路径为/var/lib/docker/volumes/卷名/_data

指定宿主机路径挂载
```
-v 宿主机路径:容器路径
```

扩展

#挂载时可添加容器对卷的权限控制，默认为rw，可指定ro，ro表示仅能在宿主机更改文件内容，在docker内只读
-v 宿主机路径:容器路径:ro

测试一：挂载centos镜像

[root@master ~]# docker run -it -v /root/yiyu/centos_tmp:/tmp centos:latest /bin/bash
[root@master centos_tmp]# docker ps
ConTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
c475662fa21b        centos:latest       "/bin/bash"         4 minutes ago       Up 4 minutes                            silly_hamilton
#检查是否挂载成功
[root@master centos_tmp]# docker inspect c475662fa21b|grep  -i mounts -A 10
        "Mounts": [
            {
                "Type": "bind",
                "Source": "/root/yiyu/centos_tmp",
                "Destination": "/tmp",
                "Mode": "",
                "RW": true,    #默认挂载权限为rw
                "Propagation": "rprivate"
            }
        ],
        "Config": {
[root@master centos_tmp]#

分别在容器外创建文件、容器内创建文件验证：

停止容器，检查文件是否存在：

测试二：搭建mysql卷环境

[root@master centos_tmp]# docker pull mysql:5.7
[root@master ~]# docker run -it -d --name="mysql_docker" -v /root/yiyu/mysql/conf:/etc/mysql/conf -v /root/yiyu/mysql/libs:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 mysql:5.7     
c738c38ffdf5b5d731cedec603215886b74ad83...03a0bf6cb2249986c5d9
ConTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                 NAMES
c738c38ffdf5        mysql:5.7           "docker-entrypoint.s…"   37 seconds ago      Up 36 seconds       3306/tcp, 33060/tcp   mysql_docker
#查看挂载状态
[root@master ~]# docker inspect c738c38ffdf5|grep -i mounts -A 20
        "Mounts": [
            {
                "Type": "bind",
                "Source": "/root/yiyu/mysql/conf",
                "Destination": "/etc/mysql/conf",
                "Mode": "",
                "RW": true,
                "Propagation": "rprivate"
            },
            {
                "Type": "bind",
                "Source": "/root/yiyu/mysql/libs",
                "Destination": "/var/lib/mysql",
                "Mode": "",
                "RW": true,
                "Propagation": "rprivate"
            }
        ],
        "Config": {
            "Hostname": "c738c38ffdf5",
            "Domainname": "",
#查看本地路径
[root@master ~]# ll /root/yiyu/mysql/
total 4
drwxr-xr-x. 2 root    root    6 Nov 22 22:08 conf
drwxr-xr-x. 5 polkitd root 4096 Nov 22 22:10 libs
[root@master ~]# ll /root/yiyu/mysql/conf/
total 0
[root@master ~]# ll /root/yiyu/mysql/libs/
total 188484
-rw-r-----. 1 polkitd input       56 Nov 22 22:08 auto.cnf
-rw-------. 1 polkitd input     1676 Nov 22 22:08 ca-key.pem
-rw-r--r--. 1 polkitd input     1112 Nov 22 22:08 ca.pem
-rw-r--r--. 1 polkitd input     1112 Nov 22 22:08 client-cert.pem
-rw-------. 1 polkitd input     1676 Nov 22 22:08 client-key.pem
...
#查看容器内路径
[root@master centos_tmp]# docker exec -it c738c38ffdf5 /bin/bash 
root@c738c38ffdf5:/# ls /etc/mysql/conf
root@c738c38ffdf5:/# ls -l /var/lib/mysql
total 188484
-rw-r-----. 1 mysql mysql       56 Nov 22 14:08 auto.cnf
-rw-------. 1 mysql mysql     1676 Nov 22 14:08 ca-key.pem
-rw-r--r--. 1 mysql mysql     1112 Nov 22 14:08 ca.pem
-rw-r--r--. 1 mysql mysql     1112 Nov 22 14:08 client-cert.pem
-rw-------. 1 mysql mysql     1676 Nov 22 14:08 client-key.pem
...
#容器内创建文件，容器外验证
root@c738c38ffdf5:/# echo "test_sh" > /etc/mysql/conf/test_sh_yiyu.sh
root@c738c38ffdf5:/# exit
[root@master centos_tmp]# ls /root/yiyu/mysql/conf/ -l
total 4
-rw-r--r--. 1 root root 8 Nov 22 22:18 test_sh_yiyu.sh
#删除容器，验证文件是否还在
[root@master centos_tmp]# docker rm -f c738c38ffdf5
c738c38ffdf5
[root@master centos_tmp]# docker ps
ConTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
[root@master centos_tmp]# ll /root/yiyu/mysql/
total 4
drwxr-xr-x. 2 root    root   29 Nov 22 22:18 conf
drwxr-xr-x. 5 polkitd root 4096 Nov 22 22:10 libs
[root@master centos_tmp]# ll /root/yiyu/mysql/conf/
total 4
-rw-r--r--. 1 root root 8 Nov 22 22:18 test_sh_yiyu.sh
[root@master centos_tmp]# ll /root/yiyu/mysql/libs/
total 188484
-rw-r-----. 1 polkitd input       56 Nov 22 22:08 auto.cnf
-rw-------. 1 polkitd input     1676 Nov 22 22:08 ca-key.pem
-rw-r--r--. 1 polkitd input     1112 Nov 22 22:08 ca.pem
-rw-r--r--. 1 polkitd input     1112 Nov 22 22:08 client-cert.pem
-rw-------. 1 polkitd input     1676 Nov 22 22:08 client-key.pem
...
#至此，容器创建时通过-v挂载的目录，容器运行后新增到挂载目录的文件，在容器删除时不会消失

测试三：通过dockerFile挂载数据卷

#创建docker_file文件目录
[root@master docker_file]# mkdir -p ~/yiyu/docker_file/
[root@master docker_file]# cd ~/yiyu/docker_file/
#挂载3个卷的docker file
[root@master docker_file]# tee ~/yiyu/docker_file/test_docker_file <<- 'EOF'
> FROM centos:latest
> VOLUME ["volume1","volume2","volume3"]
> CMD echo "ok"     
> CMD /bin/bash
> EOF
FROM centos:latest
VOLUME ["volume1","volume2","volume3"]
CMD echo "ok"
CMD /bin/bash
#编译镜像
[root@master docker_file]# docker build -f ~/yiyu/docker_file/test_docker_file -t yiyu/centos:1.0 ./
Sending build context to Docker daemon  2.048kB
Step 1/4 : FROM centos:latest
 ---> 5d0da3dc9764
Step 2/4 : VOLUME ["volume1","volume2","volume3"]
 ---> Using cache
 ---> e1c7151792b2
Step 3/4 : CMD echo "ok"
 ---> Using cache
 ---> 313c3d61e1f6
Step 4/4 : CMD /bin/bash
 ---> Using cache
 ---> a4d1fa934530
Successfully built a4d1fa934530
Successfully tagged yiyu/centos:1.0
#查看镜像
[root@master docker_file]# docker images
REPOSITORY            TAG                 IMAGE ID            CREATED              SIZE
yiyu/centos           1.0                 a4d1fa934530        about a minute ago   231MB
tomcat_local          1.0                 c0855d5befbd        26 hours ago         685MB
tomcat                9.0                 76206e3ba4b1        4 days ago           680MB
#启动容器检查挂载是否成功
[root@master docker_file]# docker run -it --name="yiyu_centos" yiyu/centos:1.0 /bin/bash
[root@3fdfae345dcc /]# ls -ld vo*
drwxr-xr-x. 2 root root 6 Nov 23 14:21 volume1
drwxr-xr-x. 2 root root 6 Nov 23 14:21 volume2
drwxr-xr-x. 2 root root 6 Nov 23 14:21 volume3
[root@3fdfae345dcc /]# touch volume1/test_by 
#退出容器检查文件是否创建成功
[root@3fdfae345dcc /]# exit
exit
[root@master docker_file]# docker inspect yiyu_centos
                "Type": "volume",
                "Name": "fafa186d6965db85cec19eba9473e19f1b713569ed15f89873130eeb75d86a4a",
                "Source": "/var/lib/docker/volumes/fafa186d6965db85cec19eba9473e19f1b713569ed15f89873130eeb75d86a4a/_data",
                "Destination": "volume1",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
#查得volume1对应得宿主机路径为/var/lib/docker/volumes/fafa186d6965db85cec19eba9473e19f1b713569ed15f89873130eeb75d86a4a/_data
[root@master docker_file]# ls -l /var/lib/docker/volumes/fafa186d6965db85cec19eba9473e19f1b713569ed15f89873130eeb75d86a4a/_data
total 0
-rw-r--r--. 1 root root 0 Nov 23 22:22 test_by

数据容器

--volumes-from
#先启动一个容器A，再通过--volumes-from 指定复制容器A的卷来启动容器B、C，则容器A、B、C卷内容共享，任意容器宕机后不会导致其他容器卷内容消失
#用上面生成的yiyu_centos启动3个容器验证，已知yiyu_centos挂载了3个卷：volume1~volume3
#创建第一个
[root@master ~]# docker run -it --name="docker01" yiyu/centos:1.0 /bin/bash
[root@5a186457299a /]# ls -dl volume*
drwxr-xr-x. 2 root root 6 Nov 24 11:58 volume1
drwxr-xr-x. 2 root root 6 Nov 24 11:58 volume2
drwxr-xr-x. 2 root root 6 Nov 24 11:58 volume3
#再开一个窗口创建第二个
[root@master ~]# docker run -it --name="docker02" --volumes-from docker01 yiyu/centos:1.0 /bin/bash
[root@800867154ec9 /]# ls -ld volume*
drwxr-xr-x. 2 root root 6 Nov 24 12:00 volume1
drwxr-xr-x. 2 root root 6 Nov 24 12:00 volume2
drwxr-xr-x. 2 root root 6 Nov 24 12:00 volume3
#再开一个创建创建第三个
[root@master ~]# docker run -it --name="docker03" --volumes-from docker02 yiyu/centos:1.0 /bin/bash
[root@d6c45a5f7461 /]# ls -ld volume*
drwxr-xr-x. 2 root root 6 Nov 24 12:00 volume1
drwxr-xr-x. 2 root root 6 Nov 24 12:00 volume2
drwxr-xr-x. 2 root root 6 Nov 24 12:00 volume3
#创建好了，在docker02里创建个文件，看docker03、docker01里是否有（见下图）

#删除docker01，验证docker02、docker03卷中文件是否还在（见下图）
[root@master ~]# docker rm -f docker01
docker01
[root@master ~]# docker ps -a
ConTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
d6c45a5f7461        yiyu/centos:1.0     "/bin/bash"         5 minutes ago       Up 5 minutes                            docker03
800867154ec9        yiyu/centos:1.0     "/bin/bash"         6 minutes ago       Up 6 minutes                            docker02
[root@master ~]#

volume管理

docker volume create 卷名 	#使用默认的local drive创建一个volume
docker rm -v 容器id			#删除容器时删除卷
docker volume rm 卷名 		#删除卷
docker volume ls 			 #查看本机卷
docker volume ls -qf dangling=true #查询孤单卷
docker volume inspect 卷名 	#查看指定卷信息
docker inspect 卷名 			#查看指定卷信息
#当用rm删除容器后，会留下孤单卷
docker volume rm $(docker volume ls -qf dangling=true)  #批量删除孤单卷

DockerFile 构建步骤

编写dockerfile
docker build
docker run
dockers push

基础语法

每个指令（关键字）必须大写
从上到下，顺序执行
注释用#
每一个指令都创建一个镜像层并提交

常用命令

FROM 		#基础镜像，基础镜像必须是小写，否则会 invalid reference format: repository name must be lowercase
MAINTAINER	#维护者信息
ADD			#往镜像中添加
COPY		#类似ADD，往镜像中拷贝东西
RUN			#构建时运行的指令
CMD			#启动时默认运行的指令，如果指定了其他执行命令或者用了ENTRYPOINT,CMD就不会执行
ENTRYPOINT	#容器启动时运行的指令，追加
onBUILD		#这个镜像被继承时，触发的动作
ENV			#设置镜像的环境变量
WORKDIR		#指定镜像的工作目录，进去容器默认的目录
EXPOSE		#暴露端口
VOLUME		#卷挂载，无法指定宿主机的对应目录，只能随机生成，VOLUME ["/data1","/data2"]

CMD和ENTRYPOINT的区别:

编写两个dockersfile

[root@master docker_file]# cat docker_cmd 
FROM centos

MAINTAINER yiyu

CMD ["ls","-a"]
[root@master docker_file]# cat docker_entrypoint 
FROM centos

MAINTAINER yiyu

ENTRYPOINT ["ls","-a"]
[root@master docker_file]#

2. 分别编译生成镜像

[root@master docker_file]# docker build -f docker_cmd -t centos_cmd:0.1 .
[root@master docker_file]# docker build -f docker_entrypoint -t centos_entrypoint:0.1 .       
[root@master docker_file]#

3. 查看镜像列表

[root@master docker_file]# docker images|grep centos
centos_entrypoint     0.1                 5fa9ded07c07        6 seconds ago       231MB
centos_cmd            0.1                 e615afa00c74        10 seconds ago      231MB
mycentos              1.0                 3e8d28433743        2 days ago          371MB
yiyu/centos           1.0                 a4d1fa934530        3 days ago          231MB
centos                latest              5d0da3dc9764        2 months ago        231MB

运行容器，在docker run后添加-a对比

[root@master docker_file]# docker run -it centos_cmd:0.1 -l
docker: Error response from daemon: OCI runtime create failed: container_linux.go:380: starting container process caused: exec: "-l": executable file not found in $PATH: unknown.
ERRO[0001] error waiting for container: context canceled
[root@master docker_file]# docker run -it centos_entrypoint:0.1 -l 
total 0
drwxr-xr-x.   1 root root   6 Nov 27 07:16 .
drwxr-xr-x.   1 root root   6 Nov 27 07:16 ..
-rwxr-xr-x.   1 root root   0 Nov 27 07:16 .dockerenv
lrwxrwxrwx.   1 root root   7 Nov  3  2020 bin -> usr/bin
drwxr-xr-x.   5 root root 360 Nov 27 07:16 dev
drwxr-xr-x.   1 root root  66 Nov 27 07:16 etc
drwxr-xr-x.   2 root root   6 Nov  3  2020 home
...

结论：从上可以看出，启动时添加的-a，会把CMD中的参数全部替换掉，转而把你输入的参数当成命令去执行，而会在ENTRYPOINT的参数后面是添加。即-l和ls -a -l的区别。

实例1：制作centos镜像

#编写前
[root@master ~]# docker images|grep centos
yiyu/centos           1.0                 a4d1fa934530        23 hours ago        231MB
centos                latest              5d0da3dc9764        2 months ago        231MB

1.编写dockerfile

[root@master docker_file]# cat  ~/yiyu/docker_file/centos_docker_file
MAINTAINER yiyu

ENV default_path="/usr/local/bin"

WORKDIR $default_path

RUN yum install -y perf
RUN yum install -y net-tools

EXPOSE 8080

CMD echo "$default_path"
CMD /bin/bash

构建dockerfile，看到最后的两个successfully就说明构建成功了

[root@master docker_file]# docker build -f centos_docker_file -t mycentos:1.0 ~/yiyu/docker_file/
Sending build context to Docker daemon  3.072kB
Step 1/9 : FROM yiyu/centos:1.0
...
Successfully built 3e8d28433743
Successfully tagged mycentos:1.0
#查看镜像
[root@master docker_file]# docker images|grep centos
mycentos              1.0                 3e8d28433743        46 seconds ago      371MB
yiyu/centos           1.0                 a4d1fa934530        23 hours ago        231MB
centos                latest              5d0da3dc9764        2 months ago        231MB

分别启动 yiyu/centos:1.0 和 mycentos:1.0 对比，发现前者无perf和ifconfig命令，后者有

#启动制作前的
[root@master docker_file]# docker run -it --name="before_centos" yiyu/centos:1.0 /bin/bash
[root@aaf5b20b026f /]# perf --help
bash: perf: command not found
[root@aaf5b20b026f /]# ifconfig
bash: ifconfig: command not found
[root@aaf5b20b026f /]# 
#启动制作后的
[root@master docker_file]# docker run -it --name="after_centos" mycentos:1.0 /bin/bash
[root@49812951c620 bin]# perf --help

 usage: perf [--version] [--help] [OPTIONS] COMMAND [ARGS]
 ...
 [root@49812951c620 bin]# ifconfig
eth0: flags=4163  mtu 1500
        inet 172.17.0.2  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:ac:11:00:02  txqueuelen 0  (Ethernet)
        RX packets 8  bytes 656 (656.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

实例2：制作可动态发布的tomcat镜像

1. 准备一个tomcat包和jdk包

[root@master tomcat_pack]# ll
total 195380
-rw-r--r--. 1 root root  10305939 Nov 27 15:27 apache-tomcat-8.5.50.tar.gz
-rw-r--r--. 1 root root 189756259 Nov 27 15:44 jdk-8u161-linux-x64.tar.gz
-rw-r--r--. 1 root root         0 Nov 27 15:47 readMe.md
#创建目录
[root@master tomcat_pack]# mkdir -p ./tomcat_8.5.50/{test,logs}

2. 编写dockerfile

[root@master tomcat_pack]# cat docker_tomcat
FROM centos
MAINTAINER yiyu

ADD ./jdk-8u161-linux-x64.tar.gz  /usr/local/
ADD ./apache-tomcat-8.5.50.tar.gz /usr/local/

COPY ./readMe.md /usr/local/

RUN yum -y install which net-tools

ENV MY_PATH="/usr/local"
ENV WORKDIR=$MY_PATH
ENV JAVA_HOME="/usr/local/jdk1.8.0_161"
ENV CLASSPTH="$JAVA_HOME/lib"
ENV CATALINA_HOME="/usr/local/apache-tomcat-8.5.50"
ENV CATALINA_BASH="/usr/local/apache-tomcat-8.5.50"
ENV PATH="$PATH:$JAVA_HOME/bin:$CATALINA_HOME/lib:$CATALINA_HOME/bin"

EXPOSE 8080

CMD /usr/local/apache-tomcat-8.5.50/bin/startup.sh && tail -f /usr/local/apache-tomcat-8.5.50/logs/catalina.out

构建dockerfile

[root@master tomcat_pack]# docker build -f docker_tomcat -t mytomcat:0.1 .
Sending build context to Docker daemon  200.1MB
Step 1/15 : FROM centos
 ---> 5d0da3dc9764
Step 2/15 : MAINTAINER yiyu
...
 ---> a9138168a7bb
Successfully built a9138168a7bb
Successfully tagged mytomcat:0.1
[root@master tomcat_pack]# docker images
REPOSITORY            TAG                 IMAGE ID            CREATED             SIZE
mytomcat              0.1                 a9138168a7bb        3 minutes ago       669MB
centos_entrypoint     0.1                 5fa9ded07c07        about an hour ago   231MB
centos_cmd            0.1                 e615afa00c74        about an hour ago   231MB

启动容器

[root@master tomcat_pack]# docker run -idt --name="tomcat_test" -p 9080:8080 -v /root/tomcat_pack/tomcat_8.5.50/logs:/usr/local/apache-tomcat-8.5.50/logs -v /root/tomcat_pack/tomcat_8.5.50/test:/usr/local/apache-tomcat-8.5.50/webapps/test mytomcat:0.1                            
51b6911b1f683cc7ccb07e8639702fd8fd01b328df9414ab13d463ac5b173275

访问验证

[root@master tomcat_pack]# curl -I localhost:9080
HTTP/1.1 200 
Content-Type: text/html;charset=UTF-8
Transfer-Encoding: chunked
Date: Sat, 27 Nov 2021 08:52:42 GMT

发布新内容

#因为在dockerfile中做了test目录的卷挂载（通过docker inspect 容器id可确认），所以直接修改test目录的内容，就会更新容器中test目录的内容
        "Mounts": [
            {
                "Type": "bind",
                "Source": "/root/tomcat_pack/tomcat_8.5.50/logs",
                "Destination": "/usr/local/apache-tomcat-8.5.50/logs",
                "Mode": "",
                "RW": true,
                "Propagation": "rprivate"
            },
            {
                "Type": "bind",
                "Source": "/root/tomcat_pack/tomcat_8.5.50/test",
                "Destination": "/usr/local/apache-tomcat-8.5.50/webapps/test",
                "Mode": "",
                "RW": true,
                "Propagation": "rprivate"
            }
        ],
#修改/root/tomcat_pack/tomcat_8.5.50/test下的内容
[root@master test]# cat index.html 
hello java
[root@master test]#

验证访问

[root@master test]# curl localhost:9080/test/
hello java
[root@master test]# 
#又因为做了日志路径挂载，所以也可以在宿主机的/usr/local/apache-tomcat-8.5.50/logs下查看日志，不用登入容器，即使节点宕机，日志也不会丢失。

或者用浏览器访问：

发布镜像到docker hub

[root@master tomcat_8.5.50]# docker images
REPOSITORY            TAG                 IMAGE ID            CREATED             SIZE
mytomcat              0.1                 a9138168a7bb        19 minutes ago      669MB
centos_entrypoint     0.1                 5fa9ded07c07        2 hours ago         231MB
#push到官方hub需要已名字/镜像名:tag的形式，上面做的这个mytomcat:1.0需要重新打tag
[root@master tomcat_8.5.50]# docker tag mytomcat:0.1 yiyu5527/mytomcat8.5.50:0.1
[root@master tomcat_8.5.50]# docker images
REPOSITORY                TAG                 IMAGE ID            CREATED             SIZE
yiyu5527/mytomcat8.5.50   0.1                 a9138168a7bb        24 minutes ago      669MB
mytomcat                  0.1                 a9138168a7bb        24 minutes ago      669MB
#push(记得先执行docker login登录自己帐号，没有帐号需要先去docker hub注册)
[root@master tomcat_8.5.50]# docker push yiyu5527/mytomcat8.5.50:0.1
The push refers to repository [docker.io/yiyu5527/mytomcat8.5.50]
a5db832a5077: Pushed 
ec1302ae29f9: Pushed 
c10265c2b734: Pushed 
03c12ebc4a35: Pushed 
74ddd0ec08fa: Mounted from library/centos 
0.1: digest: sha256:87acca3eb6329ac9721e820ae891502...f8fea38dda512dd90d2cb0810af size: 1373
上传成功

扩展：

docker history 镜像id 	#查看镜像的构建记录
docker login [仓库地址]		#登录仓库，不带地址默认为docker hub，带地址则表示登录登录指定仓库，一般后者用的多
docker logout				#登出
docker save					#保存镜像到本地，比如备份成tar包
docker tag 镜像id				#给镜像重新打tag
docker push

最后附上docker的全流程图（侵删）

Docker基础（二）

hello java

hello java

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