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上云——docker基础篇：挂载、制作dockerfile_docker挂载mnt目录

作者：小蓝xlanll | 2024-03-06 05:23:01

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docker挂载mnt目录

文章目录

1 容器数据卷

# 将容器内的数据同步到本地，目录挂载在本地（持久化）

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使用数据卷

方式一

# 方式一：直接使用命令来挂载
docker run -it -v 主机目录,容器内目录

# 案例 /usr/local/docker_data/test是主机目录,/home是容器目录
[root@lv94 docker_data]# docker run -it -v /usr/local/docker_data/test:/home centos /bin/bash

# 查看容器的相关信息
docker inspect 容器id
# Mounts就是挂载的相关信息

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[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-kidydRpq-1637153803385)(F:/ZNV/%E7%AC%94%E8%AE%B0%E5%9B%BE%E7%89%87/docker/image-20211111202333242.png)]

不管是在主机还是在容器内对该路径下文件操作，都会同步改变，即使容器exit后修改目录下文件后重新attach容器发现是同步修改过的

docker安装mysql利用挂载目录

# 下载docker镜像
docker pull mysql:5.7

# 主机挂载mysql conf文件、数据目录、用户名密码
# 官方案例：docker run --name some-mysql -e MYSQL_ROOT_PASSWORD=my-secret-pw -d mysql:tag
-d 后台运行
-p 端口映射
-v 数据卷挂载
-e 环境参数配置
--name 容器名称
[root@lv94 docker]# docker run -d -p 3344:3306 -v /usr/local/soft/docker/mysql/conf:/etc/mysql/conf.d -v /usr/local/soft/docker/mysql/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 --name mysql01 mysql:5.7

# 启动后，用数据库管理和设计工具(比如DBeaver、Navicat)进行连接，可以连接成功
# 新建一个数据后，发现挂载的目录下也会同样出现该数据

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具名和匿名挂载

# 匿名挂载
-v 容器内路径

`下面的情况就是匿名挂载，因为没有指定挂载所在主机路径,只是指定了容器的目录`
[root@lv94 docker]# docker run -d -P --name nginx03 -v /etc/nginx nginx
205ac0f317013b86114a14736f5f7a721a5295264bfa88b64d082dc09eb7f1c3

# 查看所有volume的情况
[root@lv94 docker]# docker volume ls
DRIVER    VOLUME NAME
local     4bcc8cf2fc420c1e0f909ebb3085e7d77b66c851752592527e5d492932616ca7
local     56e19184c820b393305a44b93e8aa5869bfce2606d4bc26c2514d014ab1a4f3b
local     223a3e41073f3ac968a86625aec7c6957052e3cce6982f571a10751c5502631a
[root@lv94 docker]#



[root@lv94 docker]# docker run -d -P --name nginx04 -v specificname_nginx:/etc/nginx nginx
28626c8b0afbe19539e58650b5d80159b9e151650f1185cc5e628ff32b480743
[root@lv94 docker]# docker volume ls
DRIVER    VOLUME NAME
local     4bcc8cf2fc420c1e0f909ebb3085e7d77b66c851752592527e5d492932616ca7
local     56e19184c820b393305a44b93e8aa5869bfce2606d4bc26c2514d014ab1a4f3b
local     223a3e41073f3ac968a86625aec7c6957052e3cce6982f571a10751c5502631a
local     specificname_nginx
[root@lv94 docker]#

# 如何用volume name找到主机挂载的目录
docker volume inspect [VOLUME NAME]

[root@lv94 docker]# docker volume inspect specificname_nginx
[
    {
        "CreatedAt": "2021-11-12T19:48:33+08:00",
        "Driver": "local",
        "Labels": null,
        "Mountpoint": "/var/lib/docker/volumes/specificname_nginx/_data",
        "Name": "specificname_nginx",
        "Options": null,
        "Scope": "local"
    }
]

# 没有指定的挂载目录其实都在/var/lib/docker/volumes/xxx 下


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区别具名挂载、匿名挂载、指定路径挂载？

-v + xxx挂载类型
容器内路径匿名挂载
卷名:容器内路径具名挂载
/主机路径:容器内路径指定路径挂载

部分还有加上权限的功能,ro:只读、rw:可读可写，ro只能通过主机操作，容器内部无权限，默认是rw

比如:docker run -d -P --name nginx04 -v specificname_nginx:/etc/nginx:ro nginx

docker run -d -P --name nginx04 -v specificname_nginx:/etc/nginx:rw nginx

预了解docker file

方式二

docker file是用来构建docker镜像的构建文件命令脚本

通过脚本可以生成镜像，镜像是分层结构的，脚本自然是一个个的，对应每一层

举例：创建一个文件，比如dockerfile1，输入以下代码保存

FROM centos

VOLUME ["volume01","volume02"]

CMD echo "---success---"
CMD /bin/bash

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命令行输入docker bulid

[root@lv94 docker-test-volume]# docker build -f dockerfile1 -t xiaoyoupei/centos .
Sending build context to Docker daemon  2.048kB
Step 1/4 : FROM centos
---> 5d0da3dc9764
Step 2/4 : VOLUME ["volume01","volume02"]
---> Running in b479f0273842
Removing intermediate container b479f0273842
---> 52090f97f6f6
Step 3/4 : CMD echo "---success---"
---> Running in 9c3ea2e0f86a
Removing intermediate container 9c3ea2e0f86a
---> 903915689e09
Step 4/4 : CMD /bin/bash
---> Running in 0a71b49dd88d
Removing intermediate container 0a71b49dd88d
---> c898e5abd096
Successfully built c898e5abd096
Successfully tagged xiaoyoupei/centos:latest

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查看镜像docker images

[root@lv94 docker-test-volume]# docker images
REPOSITORY            TAG       IMAGE ID       CREATED          SIZE
xiaoyoupei/centos     latest    c898e5abd096   53 seconds ago   231MB

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可以看到我们是带了挂载的直接docker ps，查看容器id再查看详细信息docker inspect 容器id，就可以找到Mounts下的文件挂载主机的路径，这是匿名的

数据卷容器

多个容器如何同步数据？采用数据卷容器

# 启动第一个
[root@lv94 ~]# docker run -it --name docker01 xiaoyoupei/centos
[root@0f1d9d632b4e /]# ls
bin  etc   lib    lost+found  mnt  proc  run   srv  tmp  var       volume02
dev  home  lib64  media       opt  root  sbin  sys  usr  volume01
# 还记得怎么退出？ctrl+p+q

# 启动第二个
[root@lv94 ~]# docker run -it --name docker02 --volumes-from docker01 xiaoyoupei/centos
[root@cf4f92daf880 /]# ls
bin  etc   lib    lost+found  mnt  proc  run   srv  tmp  var       volume02
dev  home  lib64  media       opt  root  sbin  sys  usr  volume01

# 在被挂载的docker01目录中创建目录看docker02是否存在
[root@lv94 ~]# docker ps
CONTAINER ID   IMAGE                 COMMAND                  CREATED          STATUS          PORTS                               NAMES
cf4f92daf880   xiaoyoupei/centos     "/bin/sh -c /bin/bash"   54 seconds ago   Up 53 seconds                                       docker02
0f1d9d632b4e   xiaoyoupei/centos     "/bin/sh -c /bin/bash"   4 minutes ago    Up 4 minutes                                        docker01
1bc0aebaf557   mysql:5.7             "docker-entrypoint.s…"   29 hours ago     Up 29 hours     33060/tcp, 0.0.0.0:3344->3306/tcp   mysql03
cd225e4de078   portainer/portainer   "/portainer"             6 days ago       Up 6 days       0.0.0.0:8089->9000/tcp              sleepy_liskov
[root@lv94 ~]# docker attach 0f1d9d632b4e
[root@0f1d9d632b4e /]# ls
bin  etc   lib    lost+found  mnt  proc  run   srv  tmp  var       volume02
dev  home  lib64  media       opt  root  sbin  sys  usr  volume01
[root@0f1d9d632b4e /]# cd volume01/
[root@0f1d9d632b4e volume01]# ls
[root@0f1d9d632b4e volume01]# touch docker01
[root@0f1d9d632b4e volume01]# read escape sequence
[root@lv94 ~]# docker ps
CONTAINER ID   IMAGE                 COMMAND                  CREATED         STATUS         PORTS                               NAMES
cf4f92daf880   xiaoyoupei/centos     "/bin/sh -c /bin/bash"   2 minutes ago   Up 2 minutes                                       docker02
0f1d9d632b4e   xiaoyoupei/centos     "/bin/sh -c /bin/bash"   5 minutes ago   Up 5 minutes                                       docker01
1bc0aebaf557   mysql:5.7             "docker-entrypoint.s…"   29 hours ago    Up 29 hours    33060/tcp, 0.0.0.0:3344->3306/tcp   mysql03
cd225e4de078   portainer/portainer   "/portainer"             6 days ago      Up 6 days      0.0.0.0:8089->9000/tcp              sleepy_liskov
[root@lv94 ~]# docker attach cf4f92daf880
[root@cf4f92daf880 /]# cd volume01/
[root@cf4f92daf880 volume01]# ls
docker01

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得出结论，docker01创建的内容同步到了docker02上面，可以类比java中子类继承父类的；这个docker01就是数据卷容器

# 同理，再创建docker03也会共享
[root@lv94 ~]# docker run -it --name docker03 --volumes-from docker01 xiaoyoupei/centos
[root@be64d3656dfb /]# cd volume0
bash: cd: volume0: No such file or directory
[root@be64d3656dfb /]# cd volume01/
[root@be64d3656dfb volume01]# ls
docker01
[root@be64d3656dfb volume01]# touch docker03
[root@be64d3656dfb volume01]# 
[root@lv94 ~]# docker attach docker01
[root@0f1d9d632b4e volume01]# ls
docker01  docker03

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那问题来了？如何删除docker01，会出现什么影响？数据还在嘛？

[root@lv94 ~]# docker ps
CONTAINER ID   IMAGE                 COMMAND                  CREATED          STATUS          PORTS                               NAMES
be64d3656dfb   xiaoyoupei/centos     "/bin/sh -c /bin/bash"   2 minutes ago    Up 2 minutes                                        docker03
cf4f92daf880   xiaoyoupei/centos     "/bin/sh -c /bin/bash"   9 minutes ago    Up 9 minutes                                        docker02
0f1d9d632b4e   xiaoyoupei/centos     "/bin/sh -c /bin/bash"   12 minutes ago   Up 12 minutes                                       docker01
1bc0aebaf557   mysql:5.7             "docker-entrypoint.s…"   29 hours ago     Up 29 hours     33060/tcp, 0.0.0.0:3344->3306/tcp   mysql03
cd225e4de078   portainer/portainer   "/portainer"             6 days ago       Up 6 days       0.0.0.0:8089->9000/tcp              sleepy_liskov
[root@lv94 ~]# docker rm -f 0f1d9d632b4e
0f1d9d632b4e
[root@lv94 ~]# docker ps
CONTAINER ID   IMAGE                 COMMAND                  CREATED         STATUS         PORTS                               NAMES
be64d3656dfb   xiaoyoupei/centos     "/bin/sh -c /bin/bash"   2 minutes ago   Up 2 minutes                                       docker03
cf4f92daf880   xiaoyoupei/centos     "/bin/sh -c /bin/bash"   9 minutes ago   Up 9 minutes                                       docker02
1bc0aebaf557   mysql:5.7             "docker-entrypoint.s…"   29 hours ago    Up 29 hours    33060/tcp, 0.0.0.0:3344->3306/tcp   mysql03
cd225e4de078   portainer/portainer   "/portainer"             6 days ago      Up 6 days      0.0.0.0:8089->9000/tcp              sleepy_liskov
[root@lv94 ~]# docker attach docker02
[root@cf4f92daf880 volume01]# ls
docker01  docker03

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结论是即使被挂载的容器删除了，需挂载的容器数据还在

，为什么？因为这是备份的，所以容器虽然是隔离的，但是数据是可以共享的，应用场景比如mysql共享

# 还记得-v指的是什么？匿名挂载
[root@lv94 ~]# docker run -d -p 3344:3306 -v /etc/mysql/conf.d -v /var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456 --name mysql01 mysql:5.7

[root@lv94 ~]# docker run -d -p 3344:3306 -e MYSQL_ROOT_PASSWORD=123456 --name mysql02 --volumes-form mysql01 mysql:5.7

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我们可以设想一下这个应用场景，是不是想到了安装某些集群组件的时候，拷贝文件？如何消除

2 Docker file

`命令参数的脚本`
# 构建的步骤
1、编写docker file文件
2、docker bulid 构建镜像
3、docker run 运行镜像
4、docker push 发布镜像(DockerHub)

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构建过程

# 前提知识
1、每个关键字(指令)都必须是大写字母
2、执行从上到下顺序执行
3、# 号符表示注释
4、每一个指令都会创建一个新的镜像层(分层结构)，并提交

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在实际项目的时，发布项目需要做镜像，需要创作dockerfile文件，越来越成为项目交付的主流

名词关系

docker file：梳理流程、构建文件，相当于源代码

docker images：通过dockerfile构建生成的镜像，最终发布运行的产品，可以理解为jar——>dockerimages

docker container：将dockerimages运行提供服务

dockerfile指令介绍

关键字解释
FROM基础镜像
MAINTAINER镜像是谁创作的
RUN镜像运行的命令
ADD镜像层级步骤
WORKDIR镜像工作目录
VOLUME镜像挂载的目录
EXPOSE镜像暴露的端口
CMD指定容器启动运行时命令，只有最后一个会生效，可被替代
ENTRYPOINT指定容器启动运行时命令，可以追加命令
ONBUILD构建一个被继承dockerfile后，会触发该命令
COPY类似ADD，将文件拷贝到镜像中
ENV构建时设置环境变量

dockerfile举例

dockerfile的FROM基本先写一个FROM scratch

# 构建属于你的centos
# 1、构建dockerfile文件
[root@lv94 dockerfile]# cat dockerfile_test_centos
FROM centos
MAINTAINER xiaoyoupei<masu_cs_xyp@163.com>

ENV MYPATH /usr/local
WORKDIR $MYPATH

RUN yum -y install vim
RUN yum -y install net-tools

EXPOSE 80

CMD echo $MYPATH
CMD echo "----successed----"
CMD /bin/bash

# 2、通过dockerfile构建镜像
[root@lv94 dockerfile]# docker build -f dockerfile_test_centos -t mycentos .
成功后会
Successfully built 65cbdddb7fb9
Successfully tagged mycentos:latest

# 3、运行该容器
[root@lv94 dockerfile]# docker images
REPOSITORY            TAG       IMAGE ID       CREATED              SIZE
mycentos              latest    65cbdddb7fb9   About a minute ago   342MB
xiaoyoupei/centos     latest    c898e5abd096   4 days ago           231MB
tomcat_test           1.0       89422e30211d   5 days ago           684MB
tomcat                9.0       43e421a14aec   3 weeks ago          680MB
tomcat                latest    b0e0b0a92cf9   3 weeks ago          680MB
mysql                 5.7       938b57d64674   4 weeks ago          448MB
redis                 latest    7faaec683238   5 weeks ago          113MB
nginx                 latest    87a94228f133   5 weeks ago          133MB
centos                latest    5d0da3dc9764   2 months ago         231MB
portainer/portainer   latest    580c0e4e98b0   8 months ago         79.1MB
elasticsearch         7.6.2     f29a1ee41030   20 months ago        791MB
[root@lv94 dockerfile]# docker run -it mycentos
[root@e1b09e3d0467 local]# pwd
/usr/local
[root@e1b09e3d0467 local]# ls
bin  etc  games  include  lib  lib64  libexec  sbin  share  src
[root@e1b09e3d0467 local]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.17.0.3  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:ac:11:00:03  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 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

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 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

[root@e1b09e3d0467 local]# ls
bin  etc  games  include  lib  lib64  libexec  sbin  share  src
[root@e1b09e3d0467 local]# vim test
[root@e1b09e3d0467 local]# vim test
[root@e1b09e3d0467 local]# ls
bin  etc  games  include  lib  lib64  libexec  sbin  share  src  test

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# 显示镜像构建的历史步骤
[root@lv94 dockerfile]# docker history 65cbdddb7fb9
IMAGE          CREATED         CREATED BY                                      SIZE      COMMENT
65cbdddb7fb9   5 minutes ago   /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "/bin…   0B
098b46b0dea9   5 minutes ago   /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "echo…   0B
e4375ef988bc   5 minutes ago   /bin/sh -c #(nop)  CMD ["/bin/sh" "-c" "echo…   0B
2f4f46c7b8e6   5 minutes ago   /bin/sh -c #(nop)  EXPOSE 80                    0B
50d8e8fc024d   5 minutes ago   /bin/sh -c yum -y install net-tools             35MB
98a19a4bd5dc   5 minutes ago   /bin/sh -c yum -y install vim                   76.2MB
d8849c91e2f3   6 minutes ago   /bin/sh -c #(nop) WORKDIR /usr/local            0B
873203768a7b   6 minutes ago   /bin/sh -c #(nop)  ENV MYPATH=/usr/local        0B
a739de5e10c7   6 minutes ago   /bin/sh -c #(nop)  MAINTAINER xiaoyoupei<mas…   0B
5d0da3dc9764   2 months ago    /bin/sh -c #(nop)  CMD ["/bin/bash"]            0B
<missing>      2 months ago    /bin/sh -c #(nop)  LABEL org.label-schema.sc…   0B
<missing>      2 months ago    /bin/sh -c #(nop) ADD file:805cb5e15fb6e0bb0…   231MB

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CMD和ENTRYPOINT区别

CMD 指定容器启动运行时命令，只有最后一个会生效，可被替代 ENTRYPOINT 指定容器启动运行时命令，可以追加命令

# 测试CMD
[root@lv94 dockerfile]# cat docker_test_cmd
FROM centos
CMD ["ls","-a"]
[root@lv94 dockerfile]# docker build -f docker_test_cmd -t cmdtest .
Sending build context to Docker daemon  3.072kB
Step 1/2 : FROM centos
 ---> 5d0da3dc9764
Step 2/2 : CMD ["ls","-a"]
 ---> Running in 6c3a23421744
Removing intermediate container 6c3a23421744
 ---> c37b2be7374b
Successfully built c37b2be7374b
Successfully tagged cmdtest:latest
[root@lv94 dockerfile]# docker images
REPOSITORY            TAG       IMAGE ID       CREATED          SIZE
cmdtest               latest    c37b2be7374b   30 seconds ago   231MB
mycentos              latest    65cbdddb7fb9   11 minutes ago   342MB
xiaoyoupei/centos     latest    c898e5abd096   4 days ago       231MB
tomcat_test           1.0       89422e30211d   5 days ago       684MB
tomcat                9.0       43e421a14aec   3 weeks ago      680MB
tomcat                latest    b0e0b0a92cf9   3 weeks ago      680MB
mysql                 5.7       938b57d64674   4 weeks ago      448MB
redis                 latest    7faaec683238   5 weeks ago      113MB
nginx                 latest    87a94228f133   5 weeks ago      133MB
centos                latest    5d0da3dc9764   2 months ago     231MB
portainer/portainer   latest    580c0e4e98b0   8 months ago     79.1MB
elasticsearch         7.6.2     f29a1ee41030   20 months ago    791MB
[root@lv94 dockerfile]# docker run cmdtest
.
..
.dockerenv
bin
dev
etc
home
lib
lib64
lost+found
media
mnt
opt
proc
root
run
sbin
srv
sys
tmp
usr
var

# 可以追加命令嘛？试试看
[root@lv94 dockerfile]# docker run cmdtest -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[0000] error waiting for container: context canceled
# 直接报错

# 写完全就可以
[root@lv94 dockerfile]# docker images
REPOSITORY            TAG       IMAGE ID       CREATED          SIZE
cmdtest               latest    c37b2be7374b   5 minutes ago    231MB
[root@lv94 dockerfile]# docker run c37b2be7374b ls -al
total 0
drwxr-xr-x   1 root root   6 Nov 16 12:24 .
drwxr-xr-x   1 root root   6 Nov 16 12:24 ..
-rwxr-xr-x   1 root root   0 Nov 16 12:24 .dockerenv
lrwxrwxrwx   1 root root   7 Nov  3  2020 bin -> usr/bin
......


# 测试ENTRYPOINT
[root@lv94 dockerfile]# cat docker_test_entrypoint
FROM centos
ENTRYPOINT ["ls","-a"]
[root@lv94 dockerfile]# docker build -f docker_test_entrypoint -t entrypointtest .
Sending build context to Docker daemon  4.096kB
Step 1/2 : FROM centos
 ---> 5d0da3dc9764
Step 2/2 : ENTRYPOINT ["ls","-a"]
 ---> Running in 02731ff5e636
Removing intermediate container 02731ff5e636
 ---> 85392d34fde9
Successfully built 85392d34fde9
Successfully tagged entrypointtest:latest
[root@lv94 dockerfile]# docker run entrypointtest
.
..
.dockerenv
bin
dev
etc
home
lib
lib64
......
[root@lv94 dockerfile]# docker run entrypointtest -l
total 0
drwxr-xr-x   1 root root   6 Nov 16 12:27 .
drwxr-xr-x   1 root root   6 Nov 16 12:27 ..
-rwxr-xr-x   1 root root   0 Nov 16 12:27 .dockerenv
lrwxrwxrwx   1 root root   7 Nov  3  2020 bin -> usr/bin
drwxr-xr-x   5 root root 340 Nov 16 12:27 dev
drwxr-xr-x   1 root root  66 Nov 16 12:27 etc
drwxr-xr-x   2 root root   6 Nov  3  2020 home
lrwxrwxrwx   1 root root   7 Nov  3  2020 lib -> 
......

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对比发现，entrypoint是可以直接拼接命令然后执行的，而cmd必须要写原生的命令

tomcat镜像制作

1、需要准备镜像文件tomcat压缩包、jdk的压缩包

[root@lv94 docker_tomcat_images]# ll -al
total 198636
drwxr-xr-x 2 root root        75 Nov 17 18:19 .
drwxr-xr-x 7 root root       114 Nov 17 18:02 ..
-rw-r--r-- 1 root root  11579748 Nov 17 18:19 apache-tomcat-9.0.55.tar.gz
-rw-r--r-- 1 root root 191817140 Nov 17 18:05 jdk-8u201-linux-x64.tar.gz

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2、编写dockerfile，官方命名Dockerfile，bulid会自动找到该文件，不需要-f指定

[root@lv94 docker_tomcat_images]# cat Dockerfile
FROM centos
MAINTAINER xiaoyoupei<masu_cs_xyp@163.com>

COPY readme.txt /usr/local/readme.txt

ADD jdk-8u201-linux-x64.tar.gz /usr/local/
ADD apache-tomcat-9.0.55.tar.gz /usr/local/

RUN yum -y install vim

ENV MYPATH /usr/local
WORKDIR $MYPATH

ENV JAVA_HOME /usr/local/jdk1.8.0_201
ENV CLASS_HOME $JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
ENV CATALINA_HOME /usr/local/apache-tomcat-9.0.55
ENV CATALINA_BASH /usr/local/apache-tomcat-9.0.55
ENV PATH $PATH:$JAVA_HOME/bin:$CATAINA_HOME/lib:$CATALINA_HOME/bin

EXPOSE 8080

CMD /usr/local/apache-tomcat-9.0.55/bin/startup.sh && tail -F /usr/local/apache-tomcat-9.0.55/bin/logs/catalina.out

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3、构建镜像

docker build -t mytomcat .

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4、启动镜像

[root@lv94 docker_tomcat_images]# docker run -d -p 7777:8080 --name mytomcat -v /usr/local/soft/docker/docker_tomcat_images/test:/usr/local/apache-tomcat-9.0.55/webapps/test -v /usr/local/soft/docker/docker_tomcat_images/logs:/usr/local/apache-tomcat-9.0.55/logs mytomcat

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5、访问测试

6、发布项目（在本地发布）

在test目录下新建WEB-INF目录，再在WEB-INF下新建web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                       http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
   version="2.5">

</web-app>

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在test目录下新建index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>youpei test</title>
</head>
<body>
Hello World!<br/>
<%
System.out.println("test test test");
%>
</body>
</html>

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7、访问主机7777端口的test页面（localhost:7777/test），发现成功

发布镜像到dockerhub

地址：hub.docker.com

# 登陆hub.docker.home
[root@lv94 docker_tomcat_images]# docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: xiaoyoupei
Password:
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded

# 直接push会被拒绝，没有所属(例如：/xiaoyoupei/mytomcat)
[root@lv94 docker_tomcat_images]# docker push mytomcat:latest
The push refers to repository [docker.io/library/mytomcat]
0f413793c84a: Preparing
8bed38372bc5: Preparing
c59641a64679: Preparing
295cda1076a7: Preparing
74ddd0ec08fa: Preparing
denied: requested access to the resource is denied

# 出现这样的问题怎么解决？
[root@lv94 docker_tomcat_images]# docker push xiaoyoupei/mytomcat:latest
The push refers to repository [docker.io/xiaoyoupei/mytomcat]
An image does not exist locally with the tag: xiaoyoupei/mytomcat

# 加一个分支就行
[root@lv94 docker_tomcat_images]# docker tag 16d505da0355 xiaoyoupei/tomcat:1.0
[root@lv94 docker_tomcat_images]# docker push xiaoyoupei/tomcat:1.0

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save、load

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-LUJq0d7b-1637153803388)(F:/ZNV/%E7%AC%94%E8%AE%B0%E5%9B%BE%E7%89%87/docker/image-20211117205207473.png)]

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