1、什么是容器数据卷
容器之间可以有一个数据共享的技术！Docker容器中产生的数据，同步到本地！
这就是卷技术！目录的挂载，将我们容器内的目录，挂载到Linux上面！容器间也是可以数据共享的！
1.1、使用-v挂载数据卷
方式一：使用命令方式来挂载
docker run -it -v 主机目录:容器内目录 /bin/bash1.1.1、创建一个centos
容器宿主机/ceshi目录与容器/home目录映射
[root@localhost ceshi]# docker run --name centos -d -it -v /ceshi/:/home centos:latest
ef3d9b839548e24c666d50120409f5f63fecd28eb91f5602e7d35b8ed1172c1f
[root@localhost ceshi]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ef3d9b839548 centos:latest "/bin/bash" 5 seconds ago Up 2 seconds centos在宿主机/ceshi目录下新增一个文件test.txt,并在容器对应的目录下查看
[root@localhost ceshi]# touch test.txt
[root@localhost ceshi]# ls
test.txt
[root@localhost ceshi]# docker exec -it centos bash
[root@ef3d9b839548 /]# ls /home/
test.txt
[root@ef3d9b839548 /]#查看容器对应的挂载信息
[root@localhost ceshi]# docker inspect centos
……… #省略前面部分
"Mounts": [ #挂载信息
{
"Type": "bind",
"Source": "/ceshi", #宿主机目录地址
"Destination": "/home", #容器内部目录地址
"Mode": "",
"RW": true,
"Propagation": "rprivate"
}
……… #省略后面部分1.1.2、创建一个nginx
本次实验以自己构建的nginx镜像，操作要求目录挂载如下：
/usr/local/nginx/html:/usr/local/nginx/html #静态资源站点目录 /usr/local/nginx/conf.d:/usr/local/nginx/conf.d #子配置文件目录 /usr/local/nginx/logs:/usr/local/nginx/logs #日志目录 /usr/local/nginx/conf/nginx.conf:/usr/local/nginx/conf/nginx.conf #主配置文件目录
（1）宿主机创建对应目录
[root@localhost ~]# mkdir -p /usr/local/nginx/{conf.d,conf,html,log}(2) 临时启动一个nginx容器
[root@localhost ~]# docker run --name nginx_ceshi -d -it -p 81:80 nginx:1.25.1
52ead4d72591f2b00ed7ebf96dfd13619f49c70915688d1ba5160ce88eea192b
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
52ead4d72591 nginx "/docker-entrypoint.…" 4 seconds ago Up 2 seconds 0.0.0.0:81->80/tcp, :::81->80/tcp nginx_ceshi（3）把容器内的nginx主要文件拷贝至宿主机对应目录下
#日志文件
docker cp nginx_ceshi:/usr/local/nginx/logs/access.log /usr/local/nginx/logs/
#报错文件
docker cp nginx_ceshi:/usr/local/nginx/logs/error.log /usr/local/nginx/logs/
#主配置文件
docker cp nginx_ceshi:/usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/
#50x文件
docker cp nginx_ceshi:/usr/local/nginx/html/50x.html /usr/local/nginx/html/
#首页文件
docker cp nginx_ceshi:/usr/local/nginx/html/index.html /usr/local/nginx/html/（4）删除临时容器
[root@localhost conf]# docker rm -f nginx_ceshi（5）启动容器并挂载目录
docker run --name nginx -it -d -p 80:80 \
-v /usr/local/nginx/html:/usr/local/nginx/html \
-v /usr/local/nginx/conf.d:/usr/local/nginx/conf.d \
-v /usr/local/nginx/logs:/usr/local/nginx/logs \
-v /usr/local/nginx/conf/nginx.conf:/usr/local/nginx/conf/nginx.conf nginx:1.25.1容器内创建子配置文件目录，保持与挂载一致
[root@localhost ~]# docker exec -it nginx bash
[root@bb1abe8366d5 nginx-1.25.1]# mkdir -p /usr/local/nginx/conf.d（6）修改首页文件内容并测试效果
[root@localhost ~]# echo this is new nginx web site > /usr/local/nginx/html/index.html浏览器访问效果
查看nginx日志文件访问情况
1.1.3、创建一个mysql
思考：MySQL的数据持久化问题。防止因为删除容器而导致数据删除，做目录挂载。
（1）查看并拉取mysql镜像
[root@localhost ~]# docker search mysql:5.7
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
migs/mysql-5.7 mysql:5.7 plus some basic enhancements 0 [OK]
idyci/mysql mysql:5.7.25 1
xiao806852034/mysql57 基于 mysql:5.7 0
framgiaciteam/mysql-256 FROM mysql:5.7 CMD ["--block_encryption_mod… 0
metatronx/mysql mysql:5.7 + druid account & database 0
haswind/mysql mysql:5.7 0
stsiwo/sts-blog-db base image mysql:5.7.28 0
alexmbarbosa/mysql5.7 Based on official mysql:5.7 docker image 1
llasuka/mysql mysql:5.7 0
michaelzx/docker_msyql without ONLY_FULL_GROUP_BY base on mysql:5.7… 0 [OK]
alecchyi/mysql mysql:5.7 for demo 0
denghui/mysql mysql:5.7-tz.8 0 [OK]
crbanman/mysql-tmpfs A docker image based off of mysql:5.7 that m… 0
vigasin/mysql Clone of official mysql:5.7 image, that allo… 0
variu/hyperledger-explorer-mysql mysql:5.7.23 for hyperledger explorer 0
doctorva/mysql_fede Based on Mysql:5.7 and add new configuration… 0
beyondray/kbengine-mysql kbengine auto-build env from mysql:5.7 0 [OK]
zhjs/mysql mysql:5.7 0
ahmedelshfie/spring-boot-mysql-rest-api mysql:5.7 0
liyupei/mysql Mysql:5.7 0
kamatimaru/mysql57-ja Added Japanese support settings to mysql:5.7… 0
dockerzm/mysql docker run --name mysql -e MYSQL_ROOT_PASSWO… 0
ruyli/mysql mysql:5.7 0
zeq9069/mysql_service mysql:5.7 0
zhangruihuai/mysql-node-nginx-python based on mysql:5.7 MySQL 5.7 NodeJS v14.18.… 0
[root@localhost ~]# docker pull mysql:5.7
5.7: Pulling from library/mysql
72a69066d2fe: Pull complete
93619dbc5b36: Pull complete
99da31dd6142: Pull complete
626033c43d70: Pull complete
37d5d7efb64e: Pull complete
ac563158d721: Pull complete
d2ba16033dad: Pull complete
0ceb82207cd7: Pull complete
37f2405cae96: Pull complete
e2482e017e53: Pull complete
70deed891d42: Pull complete
Digest: sha256:f2ad209efe9c67104167fc609cca6973c8422939491c9345270175a300419f94
Status: Downloaded newer image for mysql:5.7
docker.io/library/mysql:5.7
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
mysql 5.7 c20987f18b13 19 months ago 448MB
hello-world latest feb5d9fea6a5 22 months ago 13.3kB（2）创建并启动一个容器，注意启动mysql需要配置环境，配置登录密码，否则无法使用，查阅官方资料，使用参数：-e MYSQL_ROOT_PASSWORD=
[root@localhost ~]# docker run -d -it --name mysql -p 3306:3306 \
-v /home/mysql/conf:/etc/mysql/conf.d \
-v /home/mysql/data:/var/lib/mysql \
-e MYSQL_ROOT_PASSWORD=0000 mysql:5.7
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3c75b4179d4a mysql:5.7 "docker-entrypoint.s…" 5 seconds ago Up 4 seconds 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql（3）使用工具Navicat链接
（4）测试创建数据库，并在宿主机上查看
[root@localhost data]# ls
auto.cnf ca.pem client-key.pem ibdata1 ib_logfile1 mysql private_key.pem server-cert.pem sys
ca-key.pem client-cert.pem ib_buffer_pool ib_logfile0 ibtmp1 performance_schema public_key.pem server-key.pem test1.2、具名和匿名挂载
1.2.1、匿名挂载
# 匿名挂载
-v 容器内路径
docker run -d -P --name nginx01 -v /etc/nginx nginx:latest #-P（大P）随机映射端口
# 查看容器所有的volume的情况
[root@localhost ~]# docker volume ls
DRIVER VOLUME NAME
local 4cb36d1ec057cf8d1527c0cd0d0aa95be7c5f7e442261663360b9f5e2692c0ae
local 6fdd14f9e36c7f7085bcff95356b81ced251e164353123d8830ef7377d55e419
local 7e6b9a1f6126d9719603e6463f1e507d1297c138f080730c2d904993d8cf2ba9
local 21f17b4bfd4e881b9ef22b000f3fb9553593a5f2937b2b133442ff95049e49d8
local 76ac5e92ba2675eb17056634ca651d3fa13787ee1e6e46d0ca0d867a9333c0a5
local 150e65fcdafd0470cbff91129f3da6b3e8e30f9c3542d49e1b51a8ea9da3f90d
local 842b6b1caec13601db7e93bd67970e751673110f328de16ce1bd6dfce1fe827b
local 2750f4a53402bf3f72a8f5858beb9623776d71473908019b82718d260bdd3928
local 9089aca76279a28ba7416c88896f5ca3ef5798c391ab7f11be50f5af98533427
local 410664d8ac8c5cc2906360b5220e1de824a4cbe534ee7aab7ae38aeee34e2788
local ba31c0deca297ea1cdc58e33c3d314f8321632732539bcc26afed59716c301e0
local f7f472685707da4d371efed0ae2f53f05e163231091866eca9244799b1edf207
local f304255ca5805e362f5d4b5cdc209e7be7a27a9aac64199827a9b11a83518703
# 这里发现就是匿名挂载，在-v的时候写了容器内路径，没有写宿主机路径1.2.2、具名挂载
# 具名挂载
-v 卷名:容器内路径
[root@localhost ~]# docker run -d -P --name nginx02 -v nginx02:/etc/nginx nginx:latest #-P（大P）随机映射端口
3bf0b230cfe538446774d1f744bb4f75e75373a362ec8bb279f0a5c93db15a2e
# 查看容器所有的volume的情况
[root@localhost ~]# docker volume ls
DRIVER VOLUME NAME
local 4cb36d1ec057cf8d1527c0cd0d0aa95be7c5f7e442261663360b9f5e2692c0ae
local 6fdd14f9e36c7f7085bcff95356b81ced251e164353123d8830ef7377d55e419
local 7e6b9a1f6126d9719603e6463f1e507d1297c138f080730c2d904993d8cf2ba9
local 21f17b4bfd4e881b9ef22b000f3fb9553593a5f2937b2b133442ff95049e49d8
local 76ac5e92ba2675eb17056634ca651d3fa13787ee1e6e46d0ca0d867a9333c0a5
local 150e65fcdafd0470cbff91129f3da6b3e8e30f9c3542d49e1b51a8ea9da3f90d
local 842b6b1caec13601db7e93bd67970e751673110f328de16ce1bd6dfce1fe827b
local 2750f4a53402bf3f72a8f5858beb9623776d71473908019b82718d260bdd3928
local 9089aca76279a28ba7416c88896f5ca3ef5798c391ab7f11be50f5af98533427
local 410664d8ac8c5cc2906360b5220e1de824a4cbe534ee7aab7ae38aeee34e2788
local ba31c0deca297ea1cdc58e33c3d314f8321632732539bcc26afed59716c301e0
local f7f472685707da4d371efed0ae2f53f05e163231091866eca9244799b1edf207
local f304255ca5805e362f5d4b5cdc209e7be7a27a9aac64199827a9b11a83518703
local nginx02 <------这里就是具名字
# 查看下这个卷在宿主机哪个路径，通过inspect
[root@localhost ~]# docker volume inspect nginx02
[
{
"CreatedAt": "2023-08-09T16:17:41+08:00",
"Driver": "local",
"Labels": null,
"Mountpoint": "/var/lib/docker/volumes/nginx02/_data",
"Name": "nginx02",
"Options": null,
"Scope": "local"
}
]所有的docker容器内的卷，没有指定目录的情况下都是在/var/lib/docker/volumes/[v-name]/_data下
[root@localhost ~]# ls /var/lib/docker/volumes
150e65fcdafd0470cbff91129f3da6b3e8e30f9c3542d49e1b51a8ea9da3f90d 842b6b1caec13601db7e93bd67970e751673110f328de16ce1bd6dfce1fe827b
21f17b4bfd4e881b9ef22b000f3fb9553593a5f2937b2b133442ff95049e49d8 9089aca76279a28ba7416c88896f5ca3ef5798c391ab7f11be50f5af98533427
2750f4a53402bf3f72a8f5858beb9623776d71473908019b82718d260bdd3928 ba31c0deca297ea1cdc58e33c3d314f8321632732539bcc26afed59716c301e0
410664d8ac8c5cc2906360b5220e1de824a4cbe534ee7aab7ae38aeee34e2788 backingFsBlockDev
4cb36d1ec057cf8d1527c0cd0d0aa95be7c5f7e442261663360b9f5e2692c0ae f304255ca5805e362f5d4b5cdc209e7be7a27a9aac64199827a9b11a83518703
6fdd14f9e36c7f7085bcff95356b81ced251e164353123d8830ef7377d55e419 f7f472685707da4d371efed0ae2f53f05e163231091866eca9244799b1edf207
76ac5e92ba2675eb17056634ca651d3fa13787ee1e6e46d0ca0d867a9333c0a5 metadata.db
7e6b9a1f6126d9719603e6463f1e507d1297c138f080730c2d904993d8cf2ba9 nginx02查看nginx02的卷目录信息
[root@localhost ~]# ls /var/lib/docker/volumes/nginx02/_data
conf.d fastcgi_params mime.types modules nginx.conf scgi_params uwsgi_params通过具名挂载可以很方便查找我们的一个卷，大多数情况下使用具名挂载
1.3、挂载目录权限
# 通过 -v 容器内路径:{ro | rw} 改变读写权限
ro readonly #只读权限，这个路径只能通过宿主机改变，容器内部无法操作
rw readwrite #可读可写（默认权限）
# 一旦设置了容器权限，容器对我们挂载出来的内容就有限定了
[root@localhost ~]# docker run -d -P --name nginx03 -v nginx03:/etc/nginx:ro nginx:latest
[root@localhost ~]# docker run -d -P --name nginx03 -v nginx03:/etc/nginx:rw nginx:latest1.4、使用DockerFile挂载卷
Dockerfile就是用来构建docker镜像的构建文件！命令脚本！通过这个脚本可以生成一个镜像，镜像是一层一层的，所以命令也是一层一层的。
（1）创建一个目录用来挂载
[root@localhost ~]# mkdir /home/docker-test-volume
[root@localhost ~]# cd /home/docker-test-volume/
[root@localhost docker-test-volume]#（2）创建dockerfile文件
[root@localhost docker-test-volume]# vim dockerfile
FROM centos:7
VOLUME ["volume01","volume02"]
CMD echo "------successful-----"
CMD /bin/bash（3）构建镜像
[root@localhost docker-test-volume]# docker build -f /home/docker-test-volume/dockerfile -t ceshi:1.0 .
[root@localhost docker-test-volume]# docker build -f /home/docker-test-volume/dockerfile -t ceshi:1.0 .
[+] Building 16.1s (5/5) FINISHED docker:default
=> [internal] load build definition from dockerfile 0.0s
=> => transferring dockerfile: 191B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/centos:7 16.0s
=> [1/1] FROM docker.io/library/centos:7@sha256:9d4bcbbb213dfd745b58be38b13b996ebb5ac315fe75711bd618426a630e0987 0.0s
=> => resolve docker.io/library/centos:7@sha256:9d4bcbbb213dfd745b58be38b13b996ebb5ac315fe75711bd618426a630e0987 0.0s
=> => sha256:9d4bcbbb213dfd745b58be38b13b996ebb5ac315fe75711bd618426a630e0987 1.20kB / 1.20kB 0.0s
=> => sha256:dead07b4d8ed7e29e98de0f4504d87e8880d4347859d839686a31da35a3b532f 529B / 529B 0.0s
=> => sha256:eeb6ee3f44bd0b5103bb561b4c16bcb82328cfe5809ab675bb17ab3a16c517c9 2.75kB / 2.75kB 0.0s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:c655038184119c5598074af7da884ff39057e5a0c4dfd8173353f9384b53df29 0.0s
=> => naming to docker.io/library/ceshi:1.0 （4）查看镜像
[root@localhost docker-test-volume]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ceshi 1.0 c65503818411 23 months ago 204MB（5）给自己创建的镜像启动一个容器
[root@localhost ~]# docker run -d -it --name ceshi1 ceshi:1.0
e9c0994ed9644d5f34c105b16208bb9973679d78d0a866dbd2df2189478127f5
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
e9c0994ed964 ceshi:1.0 "/bin/sh -c /bin/bash" 3 seconds ago Up 1 second ceshi1
[root@localhost ~]# docker exec -it ceshi1 bash
[root@e9c0994ed964 /]# ls
anaconda-post.log bin dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var volume01 volume02 #生成镜像自动挂载的目录
[root@e9c0994ed964 /]#这个容器内目录一定和宿主机上某个目录同步，脚本内编写为匿名挂载，在volume01写一个文件
[root@e9c0994ed964 /]# cd volume01
[root@e9c0994ed964 volume01]# touch container.txt查看这个容器信息，查找卷的挂载信息
[root@localhost ~]# docker inspect ceshi1
"Mounts": [
{
"Type": "volume",
"Name": "47c313b9babba01649163c236b7db9f354f8ae5d8bb86856d0a27bba12e666bd",
"Source": "/var/lib/docker/volumes/47c313b9babba01649163c236b7db9f354f8ae5d8bb86856d0a27bba12e666bd/_data",
"Destination": "volume02",
"Driver": "local",
"Mode": "",
"RW": true,
"Propagation": ""
},
{
"Type": "volume",
"Name": "1e1a872d00ec7ba2958b3a47c26001a683f49ee0db573ee47c9b9ca2e1df11ff",
"Source": "/var/lib/docker/volumes/1e1a872d00ec7ba2958b3a47c26001a683f49ee0db573ee47c9b9ca2e1df11ff/_data",
"Destination": "volume01",
"Driver": "local",
"Mode": "",
"RW": true,
"Propagation": ""
}
宿主机查看下同步文件是否存在
[root@localhost ~]# ls /var/lib/docker/volumes/1e1a872d00ec7ba2958b3a47c26001a683f49ee0db573ee47c9b9ca2e1df11ff/_data
container.txt这种方式，未来使用的非常多。如果构建镜像的时候没有挂载，要手动镜像挂载 -v
1.5、数据卷容器--volumes-from
两个容器实现挂载相同目录，容器间数据共享。例如：mysql数据同步，多个mysql数据同步。关键命令：--volumes-from
（1）启动3个自己使用dockerfile构建的镜像
#启动第1个容器命名docker01，查看2个数据卷：volume01、volume02
[root@localhost ~]# docker run -d -it --name docker01 ceshi:1.0
2bd3b570631c1fdb5e9b44ba7e07449218e79a354ebdb40e073335654c5244eb
[root@localhost ~]# docker exec -it docker01 bash
[root@2bd3b570631c /]# ls
anaconda-post.log dev home lib64 mnt proc run srv tmp var volume02
bin etc lib media opt root sbin sys usr volume01
[root@2bd3b570631c /]##启动第2个容器命名docker02，并挂载docker01，查看2个数据卷：volume01、volume02
[root@localhost ~]# docker run -d -it --name docker02 --volumes-from docker01 ceshi:1.0
a4d762a32250ddeb8a47dc54d2bf4808dc5430b045a5c3f2ae82d181024c8a26
[root@localhost ~]# docker exec -it docker02 bash
[root@a4d762a32250 /]# ls
anaconda-post.log dev home lib64 mnt proc run srv tmp var volume02
bin etc lib media opt root sbin sys usr volume01
[root@a4d762a32250 /]#我们在docker01的目录volume01下生成一个文件，看看docker对应volume01下会不会存在
#docker01下操作
[root@localhost ~]# docker attach docker01
[root@2bd3b570631c /]# ls
anaconda-post.log dev home lib64 mnt proc run srv tmp var volume02
bin etc lib media opt root sbin sys usr volume01
[root@2bd3b570631c /]# cd volume01
[root@2bd3b570631c volume01]# ls
[root@2bd3b570631c volume01]# touch docker01
[root@2bd3b570631c volume01]# ls
docker01
#docker02下查看
[root@localhost ~]# docker attach docker02
[root@a4d762a32250 /]# cd volume01
[root@a4d762a32250 volume01]# ls
docker01 #docker01下创建的数据同步到了docker02下面
[root@a4d762a32250 volume01]##启动第3个容器命名docker03，并挂载docker01，查看2个数据卷：volume01、volume02
[root@localhost ~]# docker run -d -it --name docker03 --volumes-from docker01 ceshi:1.0
f041c047de6fa82ec5620441ad4a4f02a8f284a9c541b86399648543e97f9f65
[root@localhost ~]# docker exec -it docker03 bash
[root@f041c047de6f /]# ls
anaconda-post.log dev home lib64 mnt proc run srv tmp var volume02
bin etc lib media opt root sbin sys usr volume01
[root@f041c047de6f /]# cd volume01
[root@f041c047de6f volume01]# ls
docker01 #数据同步了
[root@f041c047de6f volume01]#
#在docker03的volume02创建一个新文件，然后分别在docker02和docker01下查看
[root@f041c047de6f /]# cd volume02
[root@f041c047de6f volume02]# ls
[root@f041c047de6f volume02]# touch docker03
[root@f041c047de6f volume02]# ls
docker03
#在docker02下查看
[root@localhost ~]# docker exec -it docker02 bash
[root@a4d762a32250 /]# ls volume02
docker03 #docker02下存在docker03创建的文件
#在docker01下查看
[root@localhost ~]# docker exec -it docker01 bash
[root@2bd3b570631c /]# ls volume02
docker03 #docker01下存在docker03创建的文件多个容器之间配置了数据共享，只要有一个容器存在数据就不会丢失。
1.5.1、多个mysql实现数据共享
# 创建第1个mysql容器，命名mysql01
[root@localhost ~]# docker run -d -it --name mysql01 -p 3306:3306 \
-v /home/mysql/conf:/etc/mysql/conf.d \
-v /home/mysql/data:/var/lib/mysql \
-e MYSQL_ROOT_PASSWORD=0000 mysql:5.7
# 创建第2个mysql容器，命名mysql02
[root@localhost ~]# docker run -d -it --name mysql02 -p 3307:3306 -e MYSQL_ROOT_PASSWORD=0000 --volumes-from mysql01 mysql:5.7
# 创建第3个mysql容器，命名mysql03
[root@localhost ~]# docker run -d -it --name mysql03 -p 3308:3306 -e MYSQL_ROOT_PASSWORD=0000 --volumes-from mysql01 mysql:5.7
#查看所有mysql容器
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
dad667c103bf mysql:5.7 "docker-entrypoint.s…" 7 seconds ago Up 3 seconds 33060/tcp, 0.0.0.0:3308->3306/tcp, :::3308->3306/tcp mysql03
35d9139ffd56 mysql:5.7 "docker-entrypoint.s…" 17 seconds ago Up 13 seconds 33060/tcp, 0.0.0.0:3307->3306/tcp, :::3307->3306/tcp mysql02
0f1073961bd1 mysql:5.7 "docker-entrypoint.s…" 40 seconds ago Up 37 seconds 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql01#使用数据库管理工具navict创建一个数据库mysql01，分别在容器mysql02和mysql03上查看
# 在容器mysql02上查看
[root@localhost data]# docker exec -it mysql02 bash
root@35d9139ffd56:~# ls /var/lib/mysql
auto.cnf ca.pem client-key.pem ib_logfile0 ibdata1 mysql performance_schema public_key.pem server-key.pem test
ca-key.pem client-cert.pem ib_buffer_pool ib_logfile1 ibtmp1 mysql01 private_key.pem server-cert.pem sys
# 在容器mysql03上查看
[root@localhost data]# docker exec -it mysql03 bash
root@dad667c103bf:/# ls /var/lib/mysql
auto.cnf ca.pem client-key.pem ib_logfile0 ibdata1 mysql performance_schema public_key.pem server-key.pem test
ca-key.pem client-cert.pem ib_buffer_pool ib_logfile1 ibtmp1 mysql01 private_key.pem server-cert.pem sys
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