脚本创建容器,数据卷技术讲解

j具名和匿名挂载，

docker run -d -P --name nginx01 -v /etc/nginx nginx

[root@localhost ~]# docker volume ls查看容器卷

DRIVER VOLUME NAME

local 8a0b0f68b5cc36a1ee1f08b9257e87f4bb6afaf27ba50a9590b26f8faf13ff23

local 23638c079fd799dcbe42cc18784039ac5fc5096fbe421f3af892295405531153

local a65de0db28679aec5865dc8c12b4c38706b1973095e30c051a570b5881644748

#这就是匿名挂载，这种就是匿名挂载，-v 只写了容器内的路径，没有写容器外的路径！

[root@localhost ~]# docker run -d -P --name nginx002 -v juming-nginx:/etc/nginx nginx

ac7905937938664debef1ac41d5da5d257c69cde900b1fcca21d6a9e39ccef4b

ERRO[0010] error waiting for container: context canceled

[root@localhost ~]# docker volume ls

DRIVER VOLUME NAME

local 8a0b0f68b5cc36a1ee1f08b9257e87f4bb6afaf27ba50a9590b26f8faf13ff23

local 23638c079fd799dcbe42cc18784039ac5fc5096fbe421f3af892295405531153

local a65de0db28679aec5865dc8c12b4c38706b1973095e30c051a570b5881644748

local juming-nginx

#通过 -v 卷名：容器内路径

# 查看一下这个卷

# 所有docker容器内的卷，没有指定目录的情怀下都是在/var/lib/docker/volumes/

[root@localhost ~]# docker volume inspect juming-nginx 查看卷的路径。

[

{

"CreatedAt": "2022-01-04T16:07:45+08:00",

"Driver": "local",

"Labels": null,

"Mountpoint": "/var/lib/docker/volumes/juming-nginx/_data",

"Name": "juming-nginx",

"Options": null,

"Scope": "local"

}

]

通过具名挂载，可以方便的找到我们的一个卷/var/lib/docker/volumes/xxxxx/_data"

如何确定是匿名挂载，还是匿名挂载，还是指定路径挂载

-v 容器内路径 #匿名挂载

-v 卷名：容器内路径，#具名挂载

-v /宿主机路径：：容器内路径# 指定路径挂载

通过-v r容器内路径：ro rw 改变读写权限

一旦这个设置了容器权限，容器对我们挂载处理的内容就有了限定

docker run -d -P --name nginx002 -v juming-nginx:/etc/nginx:ro nginx

docker run -d -P --name nginx002 -v juming-nginx:/etc/nginx:rw nginx

ro 只能通过宿主机来操作，容器内无法操作。

docker Dockerfile 通过构建docker镜像来构建镜像文件

[root@localhost volumes]# cd /root/

[root@localhost ~]# ls

anaconda-ks.cfg javase8u211-later-archive-downloads.html

docker mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz

hava.java --restart=alwys

hellworld.sh shcode

hi.sh

[root@localhost ~]# mkdir docker-test-volume

[root@localhost ~]# ls

anaconda-ks.cfg hellworld.sh --restart=alwys

docker hi.sh shcode

docker-test-volume javase8u211-later-archive-downloads.html

hava.java mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz

[root@localhost ~]# pwd

/root

[root@localhost ~]# cd docker-test-volume/

#通过这个脚本生成镜像，

#创建这个dockerfile 名字可以随机简易dockerfile

#内容的内容指令（大写）参数

[root@localhost docker-test-volume]#vim dockerfile1 这是一个匿名挂载

FROM centos

VOLUME ["volume01","volume02"]

CMD echo "----end----"

CMD /bin/bash

[root@localhost docker-test-volume]# docker build -f /root/docker-test-volume/dockerfile1 -t kuangshen/centos .

Sending build context to Docker daemon 2.048kB

Step 1/4 : FROM centos #基础镜像

---> 5d0da3dc9764

Step 2/4 : VOLUME ["volume01","volume02"] #挂载

---> Running in 8212d31a8792

Removing intermediate container 8212d31a8792

---> 1d880eac6083

Step 3/4 : CMD echo "----end----" #内部命令

---> Running in 881decd98364

Removing intermediate container 881decd98364

---> 6acfe7404567

Step 4/4 : CMD /bin/bash #生成

---> Running in e3bd5228a158

Removing intermediate container e3bd5228a158

---> 1db844ed918a

Successfully built 1db844ed918a

Successfully tagged kuangshen/centos:latest

[root@localhost docker-test-volume]# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

kuangshen/centos latest 1db844ed918a 2 minutes ago 231MB

tomcat0001 1.0 09ef6b2e826f 25 hours ago 684MB

tomcat0001 latest a22c9a74a6f8 25 hours ago 684MB

tomcat latest 13b1026f5ad2 25 hours ago 684MB

nginx latest 605c77e624dd 5 days ago 141MB

路径

docker run -it 1db844ed918a 后面没有跟/bin/bash 因为那个脚本可以直接进去

注意这里是进入这个镜像所创建的容器，并不知道这个容器id需要在宿主机外面输入

docker inspect 容器id 才可以找到宿主机创建的同步文件夹，

"Mounts": [

{

"Type": "volume",

"Name": "16da86bfbad9cdeb8acb94008b8a95e21310070253e9305069f254f8287951c2",

"Source": "/var/lib/docker/volumes/16da86bfbad9cdeb8acb94008b8a95e21310070253e9305069f254f8287951c2/_data",

"Destination": "volume02",

"Driver": "local",

"Mode": "",

"RW": true,

"Propagation": ""

volume01 volume02 这个目录是生成镜像时自动挂载的。数据卷目录。

这个卷外部一定有一个同步的目录。

[root@localhost docker-test-volume]# docker run -it 1db844ed918a 运行这个镜像

[root@77b9992258dc /]# ls

bin etc lib lost+found mnt proc run srv tmp var volume02

dev home lib64 media opt root sbin sys usr volume01

[root@77b9992258dc /]# ll

bash: ll: command not found

[root@77b9992258dc /]# ls -l

total 0

lrwxrwxrwx 1 root root 7 Nov 3 2020 bin -> usr/bin

drwxr-xr-x 5 root root 360 Jan 4 09:06 dev

drwxr-xr-x 1 root root 66 Jan 4 09:06 etc

drwxr-xr-x 2 root root 6 Nov 3 2020 home

lrwxrwxrwx 1 root root 7 Nov 3 2020 lib -> usr/lib

lrwxrwxrwx 1 root root 9 Nov 3 2020 lib64 -> usr/lib64

drwx------ 2 root root 6 Sep 15 14:17 lost+found

drwxr-xr-x 2 root root 6 Nov 3 2020 media

drwxr-xr-x 2 root root 6 Nov 3 2020 mnt

drwxr-xr-x 2 root root 6 Nov 3 2020 opt

dr-xr-xr-x 136 root root 0 Jan 4 09:06 proc

dr-xr-x--- 2 root root 162 Sep 15 14:17 root

drwxr-xr-x 11 root root 163 Sep 15 14:17 run

lrwxrwxrwx 1 root root 8 Nov 3 2020 sbin -> usr/sbin

drwxr-xr-x 2 root root 6 Nov 3 2020 srv

dr-xr-xr-x 13 root root 0 Jan 4 09:06 sys

drwxrwxrwt 7 root root 171 Sep 15 14:17 tmp

drwxr-xr-x 12 root root 144 Sep 15 14:17 usr

drwxr-xr-x 20 root root 262 Sep 15 14:17 var

drwxr-xr-x 2 root root 6 Jan 4 09:06 volume01

drwxr-xr-x 2 root root 6 Jan 4 09:06 volume02

[root@77b9992258dc /]# cd /volume01 挂载的的文件（与宿主机是同步文件）

[root@77b9992258dc volume01]# ls

[root@77b9992258dc volume01]# touch container.txt

[root@77b9992258dc volume01]# docker inspect 1db844ed918a 查看信息，不对需要到宿主机操作

bash: docker: command not found

[root@77b9992258dc volume01]# exit

exit

这里应该查看容器的配置信息。操作错误。

[root@localhost docker-test-volume]# docker inspect 1db844ed918a 这这里查看的是这个镜像的id

[

{

"Id": "sha256:1db844ed918ac3b36bb2acf4d81a057ca8055bb16e2f1f1096fb3c2714785932",

"RepoTags": [

"kuangshen/centos:latest"

"RepoDigests": [],

"Parent": "sha256:6acfe7404567644d755094fc630707a7a9f336438484e1917a5f48725e61fdb4",

"Comment": "",

"Created": "2022-01-04T08:46:41.000687602Z",

"Container": "e3bd5228a15817e8875b6dd23fcffcc5f810c388488696be364926caef9cd633",

"ContainerConfig": {

"Hostname": "e3bd5228a158",

"Domainname": "",

"User": "",

"AttachStdin": false,

"AttachStdout": false,

"AttachStderr": false,

"Tty": false,

"OpenStdin": false,

"StdinOnce": false,

"Env": [

"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

"Cmd": [

"/bin/sh",

"-c",

"#(nop) ",

"CMD [\"/bin/sh\" \"-c\" \"/bin/bash\"]"

"Image": "sha256:6acfe7404567644d755094fc630707a7a9f336438484e1917a5f48725e61fdb4",

"Volumes": {

"volume01": {},

"volume02": {}

"WorkingDir": "",

"Entrypoint": null,

"OnBuild": null,

"Labels": {

"org.label-schema.build-date": "20210915",

"org.label-schema.license": "GPLv2",

"org.label-schema.name": "CentOS Base Image",

"org.label-schema.schema-version": "1.0",

"org.label-schema.vendor": "CentOS"

}

"DockerVersion": "20.10.12",

"Author": "",

"Config": {

"Hostname": "",

"Domainname": "",

"User": "",

"AttachStdin": false,

"AttachStdout": false,

"AttachStderr": false,

"Tty": false,

"OpenStdin": false,

"StdinOnce": false,

"Env": [

"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

"Cmd": [

"/bin/sh",

"-c",

"/bin/bash"

"Image": "sha256:6acfe7404567644d755094fc630707a7a9f336438484e1917a5f48725e61fdb4",

"Volumes": {

"volume01": {},

"volume02": {}

"WorkingDir": "",

"Entrypoint": null,

"OnBuild": null,

"Labels": {

"org.label-schema.build-date": "20210915",

"org.label-schema.license": "GPLv2",

"org.label-schema.name": "CentOS Base Image",

"org.label-schema.schema-version": "1.0",

"org.label-schema.vendor": "CentOS"

}

"Architecture": "amd64",

"Os": "linux",

"Size": 231268856,

"VirtualSize": 231268856,

"GraphDriver": {

"Data": {

"MergedDir": "/var/lib/docker/overlay2/496c93719225d03e3b5a66fc3e20aeba2978bf70e2991c5e3a25ba685db9de63/merged",

"UpperDir": "/var/lib/docker/overlay2/496c93719225d03e3b5a66fc3e20aeba2978bf70e2991c5e3a25ba685db9de63/diff",

"WorkDir": "/var/lib/docker/overlay2/496c93719225d03e3b5a66fc3e20aeba2978bf70e2991c5e3a25ba685db9de63/work"

"Name": "overlay2"

"RootFS": {

"Type": "layers",

"Layers": [

"sha256:74ddd0ec08fa43d09f32636ba91a0a3053b02cb4627c35051aff89f853606b59"

]

"Metadata": {

"LastTagTime": "2022-01-04T16:46:41.743170896+08:00"

}

]

#开启另一个端口输入命令

[root@localhost ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

95eef4e92cf0 1db844ed918a "/bin/sh -c /bin/bash" 44 seconds ago Up 37 seconds vigorous_bose

ac7905937938 nginx "/docker-entrypoint.…" About an hour ago Up About an hour 0.0.0.0:49154->80/tcp, :::49154->80/tcp nginx002

7628b0d1a4ed nginx "/docker-entrypoint.…" 2 hours ago Up 2 hours 0.0.0.0:49153->80/tcp, :::49153->80/tcp nginx001

30662e30fb0a portainer/portainer "/portainer" 26 hours ago Up 2 hours 0.0.0.0:8088->9000/tcp, :::8088->9000/tcp suspicious_tharp

[root@localhost ~]# docker inspect 95eef4e92cf0

[

{

"Id": "95eef4e92cf0a9a1c1602fa6f76047dba3b6986656699a71749a55af9ddffef0",

"Created": "2022-01-04T09:28:06.035631644Z",

"Path": "/bin/sh",

"Args": [

"-c",

"/bin/bash"

"State": {

"Status": "running",

"Running": true,

"Paused": false,

"Restarting": false,

"OOMKilled": false,

"Dead": false,

"Pid": 3172,

"ExitCode": 0,

"Error": "",

"StartedAt": "2022-01-04T09:28:12.476042091Z",

"FinishedAt": "0001-01-01T00:00:00Z"

"Image": "sha256:1db844ed918ac3b36bb2acf4d81a057ca8055bb16e2f1f1096fb3c2714785932",

"ResolvConfPath": "/var/lib/docker/containers/95eef4e92cf0a9a1c1602fa6f76047dba3b6986656699a71749a55af9ddffef0/resolv.conf",

"HostnamePath": "/var/lib/docker/containers/95eef4e92cf0a9a1c1602fa6f76047dba3b6986656699a71749a55af9ddffef0/hostname",

"HostsPath": "/var/lib/docker/containers/95eef4e92cf0a9a1c1602fa6f76047dba3b6986656699a71749a55af9ddffef0/hosts",

"LogPath": "/var/lib/docker/containers/95eef4e92cf0a9a1c1602fa6f76047dba3b6986656699a71749a55af9ddffef0/95eef4e92cf0a9a1c1602fa6f76047dba3b6986656699a71749a55af9ddffef0-json.log",

"Name": "/vigorous_bose",

"RestartCount": 0,

"Driver": "overlay2",

"Platform": "linux",

"MountLabel": "",

"ProcessLabel": "",

"AppArmorProfile": "",

"ExecIDs": null,

"HostConfig": {

"Binds": null,

"ContainerIDFile": "",

"LogConfig": {

"Type": "json-file",

"Config": {}

"NetworkMode": "default",

"PortBindings": {},

"RestartPolicy": {

"Name": "no",

"MaximumRetryCount": 0

"AutoRemove": false,

"VolumeDriver": "",

"VolumesFrom": null,

"CapAdd": null,

"CapDrop": null,

"CgroupnsMode": "host",

"Dns": [],

"DnsOptions": [],

"DnsSearch": [],

"ExtraHosts": null,

"GroupAdd": null,

"IpcMode": "private",

"Cgroup": "",

"Links": null,

"OomScoreAdj": 0,

"PidMode": "",

"Privileged": false,

"PublishAllPorts": false,

"ReadonlyRootfs": false,

"SecurityOpt": null,

"UTSMode": "",

"UsernsMode": "",

"ShmSize": 67108864,

"Runtime": "runc",

"ConsoleSize": [

"Isolation": "",

"CpuShares": 0,

"Memory": 0,

"NanoCpus": 0,

"CgroupParent": "",

"BlkioWeight": 0,

"BlkioWeightDevice": [],

"BlkioDeviceReadBps": null,

"BlkioDeviceWriteBps": null,

"BlkioDeviceReadIOps": null,

"BlkioDeviceWriteIOps": null,

"CpuPeriod": 0,

"CpuQuota": 0,

"CpuRealtimePeriod": 0,

"CpuRealtimeRuntime": 0,

"CpusetCpus": "",

"CpusetMems": "",

"Devices": [],

"DeviceCgroupRules": null,

"DeviceRequests": null,

"KernelMemory": 0,

"KernelMemoryTCP": 0,

"MemoryReservation": 0,

"MemorySwap": 0,

"MemorySwappiness": null,

"OomKillDisable": false,

"PidsLimit": null,

"Ulimits": null,

"CpuCount": 0,

"CpuPercent": 0,

"IOMaximumIOps": 0,

"IOMaximumBandwidth": 0,

"MaskedPaths": [

"/proc/asound",

"/proc/acpi",

"/proc/kcore",

"/proc/keys",

"/proc/latency_stats",

"/proc/timer_list",

"/proc/timer_stats",

"/proc/sched_debug",

"/proc/scsi",

"/sys/firmware"

"ReadonlyPaths": [

"/proc/bus",

"/proc/fs",

"/proc/irq",

"/proc/sys",

"/proc/sysrq-trigger"

]

"GraphDriver": {

"Data": {

"LowerDir": "/var/lib/docker/overlay2/85970d007b92290e5c2188f3d3eea7aff8d30ef97e2f140e2d195f12d0be0357-init/diff:/var/lib/docker/overlay2/496c93719225d03e3b5a66fc3e20aeba2978bf70e2991c5e3a25ba685db9de63/diff",

"MergedDir": "/var/lib/docker/overlay2/85970d007b92290e5c2188f3d3eea7aff8d30ef97e2f140e2d195f12d0be0357/merged",

"UpperDir": "/var/lib/docker/overlay2/85970d007b92290e5c2188f3d3eea7aff8d30ef97e2f140e2d195f12d0be0357/diff",

"WorkDir": "/var/lib/docker/overlay2/85970d007b92290e5c2188f3d3eea7aff8d30ef97e2f140e2d195f12d0be0357/work"

"Name": "overlay2"

"Mounts": [

{

"Type": "volume",

"Name": "16da86bfbad9cdeb8acb94008b8a95e21310070253e9305069f254f8287951c2",

"Source": "/var/lib/docker/volumes/16da86bfbad9cdeb8acb94008b8a95e21310070253e9305069f254f8287951c2/_data",

"Destination": "volume02",

"Driver": "local",

"Mode": "",

"RW": true,

"Propagation": ""

{

"Type": "volume",

"Name": "36deb8f3bf9108300c31c6970a66cc74dd8f301337d288a0f452beafa260e5bd",

"Source": "/var/lib/docker/volumes/36deb8f3bf9108300c31c6970a66cc74dd8f301337d288a0f452beafa260e5bd/_data",

"Destination": "volume01",

"Driver": "local",

"Mode": "",

"RW": true,

"Propagation": ""

}

"Config": {

"Hostname": "95eef4e92cf0",

"Domainname": "",

"User": "",

"AttachStdin": true,

"AttachStdout": true,

"AttachStderr": true,

"Tty": true,

"OpenStdin": true,

"StdinOnce": true,

"Env": [

"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

"Cmd": [

"/bin/sh",

"-c",

"/bin/bash"

"Image": "1db844ed918a",

"Volumes": {

"volume01": {},

"volume02": {}

"WorkingDir": "",

"Entrypoint": null,

"OnBuild": null,

"Labels": {

"org.label-schema.build-date": "20210915",

"org.label-schema.license": "GPLv2",

"org.label-schema.name": "CentOS Base Image",

"org.label-schema.schema-version": "1.0",

"org.label-schema.vendor": "CentOS"

}

"NetworkSettings": {

"Bridge": "",

"SandboxID": "60b60639a0ba1949d1b683e33c7cad55c7795d214f64c3cd0dc07d8792d0f020",

"HairpinMode": false,

"LinkLocalIPv6Address": "",

"LinkLocalIPv6PrefixLen": 0,

"Ports": {},

"SandboxKey": "/var/run/docker/netns/60b60639a0ba",

"SecondaryIPAddresses": null,

"SecondaryIPv6Addresses": null,

"EndpointID": "f80f42780617bc58fee12395e0002a08b8ae2aa022bfc2ec37c4078b20e69eda",

"Gateway": "172.17.0.1",

"GlobalIPv6Address": "",

"GlobalIPv6PrefixLen": 0,

"IPAddress": "172.17.0.5",

"IPPrefixLen": 16,

"IPv6Gateway": "",

"MacAddress": "02:42:ac:11:00:05",

"Networks": {

"bridge": {

"IPAMConfig": null,

"Links": null,

"Aliases": null,

"NetworkID": "0e048dc30f7b6215097552c630805f9ac43885e5594b2cd101e768937ec5e32f",

"EndpointID": "f80f42780617bc58fee12395e0002a08b8ae2aa022bfc2ec37c4078b20e69eda",

"Gateway": "172.17.0.1",

"IPAddress": "172.17.0.5",

"IPPrefixLen": 16,

"IPv6Gateway": "",

"GlobalIPv6Address": "",

"GlobalIPv6PrefixLen": 0,

"MacAddress": "02:42:ac:11:00:05",

"DriverOpts": null

}

]

数据卷容器

两个mysql 同步数据。

子容器，父容器，centos 01挂载到centos 02shang ,就实现了数据同步，父容器上的数据卷容器，；两个或者多个容器直接实现数据共享。

[root@localhost ~]# systemctl start docker

[root@localhost ~]# docker images 查看镜像。

REPOSITORY TAG IMAGE ID CREATED SIZE

kuangshen/centos latest 1db844ed918a 46 hours ago 231MB

tomcat0001 1.0 09ef6b2e826f 2 days ago 684MB

tomcat0001 latest a22c9a74a6f8 2 days ago 684MB

tomcat latest 13b1026f5ad2 2 days ago 684MB

nginx latest 605c77e624dd 7 days ago 141MB

tomcat 9.0 b8e65a4d736d 2 weeks ago 680MB

tomcat <none> fb5657adc892 2 weeks ago 680MB

redis latest 7614ae9453d1 2 weeks ago 113MB

mysql 5.7 c20987f18b13 2 weeks ago 448MB

centos latest 5d0da3dc9764 3 months ago 231MB

portainer/portainer latest 580c0e4e98b0 9 months ago 79.1MB

elasticsearch 7.6.2 f29a1ee41030 21 months ago 791MB

[root@localhost ~]# docker run -t --name docker01 kuangshen/centos:1.0

[root@localhost ~]# docker run -it --name docker01 1db844ed918a 启动。

[root@851376de1df7 /]# ls -l

total 0

lrwxrwxrwx 1 root root 7 Nov 3 2020 bin -> usr/bin

drwxr-xr-x 5 root root 360 Jan 6 06:51 dev

drwxr-xr-x 1 root root 66 Jan 6 06:51 etc

drwxr-xr-x 2 root root 6 Nov 3 2020 home

lrwxrwxrwx 1 root root 7 Nov 3 2020 lib -> usr/lib

lrwxrwxrwx 1 root root 9 Nov 3 2020 lib64 -> usr/lib64

drwx------ 2 root root 6 Sep 15 14:17 lost+found

drwxr-xr-x 2 root root 6 Nov 3 2020 media

drwxr-xr-x 2 root root 6 Nov 3 2020 mnt

drwxr-xr-x 2 root root 6 Nov 3 2020 opt

dr-xr-xr-x 122 root root 0 Jan 6 06:51 proc

dr-xr-x--- 2 root root 162 Sep 15 14:17 root

drwxr-xr-x 11 root root 163 Sep 15 14:17 run

lrwxrwxrwx 1 root root 8 Nov 3 2020 sbin -> usr/sbin

drwxr-xr-x 2 root root 6 Nov 3 2020 srv

dr-xr-xr-x 13 root root 0 Jan 6 06:51 sys

drwxrwxrwt 7 root root 171 Sep 15 14:17 tmp

drwxr-xr-x 12 root root 144 Sep 15 14:17 usr

drwxr-xr-x 20 root root 262 Sep 15 14:17 var

drwxr-xr-x 2 root root 6 Jan 6 06:51 volume01

drwxr-xr-x 2 root root 6 Jan 6 06:51 volume02

--volumes-from 通过这个实现容器间的共享

[root@localhost ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

851376de1df7 1db844ed918a "/bin/sh -c /bin/bash" 5 minutes ago Up 5 minutes docker01

30662e30fb0a portainer/portainer "/portainer" 3 days ago Up 8 minutes 0.0.0.0:8088->9000/tcp, :::8088->9000/tcp suspicious_tharp

[root@localhost ~]# docker run -it --name docker02 --volumes-from docker01 1db844ed918a

[root@624e9220592a /]# ls -l

total 0

lrwxrwxrwx 1 root root 7 Nov 3 2020 bin -> usr/bin

drwxr-xr-x 5 root root 360 Jan 6 06:58 dev

drwxr-xr-x 1 root root 66 Jan 6 06:58 etc

drwxr-xr-x 2 root root 6 Nov 3 2020 home

lrwxrwxrwx 1 root root 7 Nov 3 2020 lib -> usr/lib

lrwxrwxrwx 1 root root 9 Nov 3 2020 lib64 -> usr/lib64

drwx------ 2 root root 6 Sep 15 14:17 lost+found

drwxr-xr-x 2 root root 6 Nov 3 2020 media

drwxr-xr-x 2 root root 6 Nov 3 2020 mnt

drwxr-xr-x 2 root root 6 Nov 3 2020 opt

dr-xr-xr-x 129 root root 0 Jan 6 06:58 proc

dr-xr-x--- 2 root root 162 Sep 15 14:17 root

drwxr-xr-x 11 root root 163 Sep 15 14:17 run

lrwxrwxrwx 1 root root 8 Nov 3 2020 sbin -> usr/sbin

drwxr-xr-x 2 root root 6 Nov 3 2020 srv

dr-xr-xr-x 13 root root 0 Jan 6 06:51 sys

drwxrwxrwt 7 root root 171 Sep 15 14:17 tmp

drwxr-xr-x 12 root root 144 Sep 15 14:17 usr

drwxr-xr-x 20 root root 262 Sep 15 14:17 var

drwxr-xr-x 2 root root 6 Jan 6 06:51 volume01

drwxr-xr-x 2 root root 6 Jan 6 06:51 volume02

打开另个终端输入命令。

[root@localhost ~]# docker attach 851376de1df7 进入docker01这个容器里

[root@851376de1df7 /]# cd volume01 进入数据同步的文件夹

[root@851376de1df7 volume01]# ls

[root@851376de1df7 volume01]# touch docker01 创建这个文件

[root@851376de1df7 volume01]# ls

docker01

[root@851376de1df7 volume01]# ls 查看生成这个文件了

docker01

[root@851376de1df7 volume01]# cd /volume02

[root@851376de1df7 volume02]# ls

[root@851376de1df7 volume02]# exit

exit

[root@localhost ~]# docker run -it --name docker02 --volumes-from docker01 1db844ed918a

docker: Error response from daemon: Conflict. The container name "/docker02" is already in use by container "624e9220592a2918436117f9a5ba6f6ca1cb175dd84c83d84ce6d631d41395d4". You have to remove (or rename) that container to be able to reuse that name.

See 'docker run --help'. 前面把这个容器关闭了，那就在生成一个查看

[root@localhost ~]# docker run -it --name docker03 --volumes-from docker01 1db844ed918a （这里也可以是kuangshen/centos:版本号）

[root@fb88d210ac79 /]# ls

bin etc lib lost+found mnt proc run srv tmp var volume02

dev home lib64 media opt root sbin sys usr volume01

[root@fb88d210ac79 /]# cd volume01

[root@fb88d210ac79 volume01]# ls

docker01 同步是有这个得

[root@localhost ~]# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

fb88d210ac79 1db844ed918a "/bin/sh -c /bin/bash" 13 minutes ago Up 13 minutes docker03

851376de1df7 1db844ed918a "/bin/sh -c /bin/bash" 28 minutes ago Exited (0) 13 minutes ago docker01

[root@localhost ~]# docker rm -f 851376de1df7

#可以删除docker01 查看docker03还是可以访问到文件。

这是一个双向拷贝的机制。

多个mysql实现数据共享，

#docker run -d -p 3310:3306 -v /home/mysql/conf:/etc/mysql/conf.d

-v /home/mysql/data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456

--name mysql01 mysql:5.7

可以写成下面的。

#docker run -d -p 3310:3306 -v /etc/mysql/conf.d

-v /var/lib/mysql -e MYSQL_ROOT_PASSWORD=123456

--name mysql01 mysql:5.7

#docker run -d -p 3310:3306 -e MYSQL_ROOT_PASSWORD=123456

--name mysql02 --volumes-form mysql01 mysql:5.7

#这个时候可以实现容器同步。使用--volumes-form实现的

结论，容器直接配置信息的传递，数据卷的生命周期，一直持续到没有容器使用为止。

但是一旦持久到了本地，本地的数据就不会删除。

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