Docker----Docker数据共享与数据卷挂载

Docker----Docker数据共享与数据卷挂载

一、使用docker run -v 具名数据卷挂载方式

（1）首先将本地 /opt/demo 目录删除

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# rm -rf /opt/demo/[root@iZbp1flzt6x7pxmxfhmxeeZ opt]#

（2）使用centos镜像，启动名为docker01的容器，并将docker中 /opt/demo 目录挂载到本地 /opt/demo目录

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# docker run -it --name docker01 -v /opt/demo:/opt/demo centos[root@6c84200b03e0 /]# ls /opt/demo/[root@6c84200b03e0 /]#

（3）新打开一个终端，继续使用centos镜像，启动名为docker02的容器，此时注意使用 --volumes-from 指定docker02容器雨docker01容器共享数据卷

[root@iZbp1flzt6x7pxmxfhmxeeZ ~]# docker run --name docker02 -it --volumes-from docker01 centos[root@aeefb255149a /]# ls /opt/demo/[root@aeefb255149a /]#

（4）同上继续启动一个docker03的容器，同样与docker01共享数据卷

[root@iZbp1flzt6x7pxmxfhmxeeZ ~]# docker run --name docker03 -it --volumes-from docker01 centos[root@b6b27b6b6d06 /]# ls /opt/demo/[root@b6b27b6b6d06 /]#

（5）在宿主机 /opt/demo/目录下创建一个文件

[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# touch test_docker.txt[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# lstest_docker.txt[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# pwd/opt/demo[root@iZbp1flzt6x7pxmxfhmxeeZ demo]#

（6）此时到三个docker容器中查看，发现三个容器的 /opt/demo 目录下均有创建的test_docker.txt文件，即做到了数据共享与同步

[root@6c84200b03e0 /]# ls /opt/demo/test_docker.txt[root@6c84200b03e0 /]#

（7）此时将docker01停掉，发现docker02和docker03的/opt/demo目录下得文件仍然不会丢失

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# docker psCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESb6b27b6b6d06 centos "/bin/bash" 18 minutes ago Up 18 minutes docker03aeefb255149a centos "/bin/bash" 19 minutes ago Up 19 minutes docker0291d5f6c93fa5 mysql:5.7 "docker-entrypoint.s…" 2 weeks ago Up 2 weeks 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql1906e95db7ab nginx "/docker-entrypoint.…" 2 weeks ago Up 19 hours 0.0.0.0:80->80/tcp, :::80->80/tcp nginx[root@iZbp1flzt6x7pxmxfhmxeeZ opt]#

容器docker02中的数据依然存在

[root@aeefb255149a /]# ls /opt/demo/test_docker.txt[root@aeefb255149a /]#

二、使用docker run -v 匿名数据卷挂载方式

（1）首先将本地 /opt/demo 目录删除

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# rm -rf /opt/demo/[root@iZbp1flzt6x7pxmxfhmxeeZ opt]#

（2）使用centos镜像，启动名为docker01的容器，并将docker中 /opt/demo 目录匿名挂载到宿主机本地

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# docker run -it --name docker01 -v /opt/demo centos[root@4ff466c1d17b /]# ls /opt/demo/[root@4ff466c1d17b /]#

（3）新打开一个终端，继续使用centos镜像，启动名为docker02的容器，此时注意使用 --volumes-from 指定docker02容器雨docker01容器共享数据卷

[root@iZbp1flzt6x7pxmxfhmxeeZ ~]# docker run --name docker02 -it --volumes-from docker01 centos[root@a36a479a87a1 /]# ls /opt/demo/[root@a36a479a87a1 /]#

（4）同上继续启动一个docker03的容器，同样与docker01共享数据卷

[root@iZbp1flzt6x7pxmxfhmxeeZ ~]# docker run --name docker03 -it --volumes-from docker01 centos[root@f5cff0d857b2 /]# ls /opt/demo/[root@f5cff0d857b2 /]#

（5）在宿主机 /opt/demo/目录下创建一个文件

[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# touch test_docker.txt[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# lstest_docker.txt[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# pwd/opt/demo[root@iZbp1flzt6x7pxmxfhmxeeZ demo]#

（6）此时到三个docker容器中查看，发现三个容器的 /opt/demo 目录下均有创建的test_docker.txt文件，即做到了数据共享与同步

[root@6c84200b03e0 /]# ls /opt/demo/test_docker.txt[root@6c84200b03e0 /]#

（7）此时将docker01停掉，发现docker02和docker03的/opt/demo目录下得文件仍然不会丢失

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# docker psCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESb6b27b6b6d06 centos "/bin/bash" 18 minutes ago Up 18 minutes docker03aeefb255149a centos "/bin/bash" 19 minutes ago Up 19 minutes docker0291d5f6c93fa5 mysql:5.7 "docker-entrypoint.s…" 2 weeks ago Up 2 weeks 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql1906e95db7ab nginx "/docker-entrypoint.…" 2 weeks ago Up 19 hours 0.0.0.0:80->80/tcp, :::80->80/tcp nginx[root@iZbp1flzt6x7pxmxfhmxeeZ opt]#

容器docker02中的数据依然存在

[root@aeefb255149a /]# ls /opt/demo/test_docker.txt[root@aeefb255149a /]#

（8）通过如下命令可以查询到匿名挂载其实也是挂载到宿主机的具体一个位置的

[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# docker psCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESf5cff0d857b2 centos "/bin/bash" About a minute ago Up About a minute docker03a36a479a87a1 centos "/bin/bash" 3 minutes ago Up 3 minutes docker024ff466c1d17b centos "/bin/bash" 4 minutes ago Up 4 minutes docker0191d5f6c93fa5 mysql:5.7 "docker-entrypoint.s…" 2 weeks ago Up 2 weeks 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql1906e95db7ab nginx "/docker-entrypoint.…" 2 weeks ago Up 19 hours 0.0.0.0:80->80/tcp, :::80->80/tcp nginx[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# docker inspect 4ff466c1d17b[ { "Id": "4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f", "Created": "2021-10-27T09:34:32.465405207Z", "Path": "/bin/bash", "Args": [], "State": { "Status": "running", "Running": true, "Paused": false, "Restarting": false, "OOMKilled": false, "Dead": false, "Pid": 11728, "ExitCode": 0, "Error": "", "StartedAt": "2021-10-27T09:34:34.305904504Z", "FinishedAt": "0001-01-01T00:00:00Z" }, "Image": "sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6", "ResolvConfPath": "/var/lib/docker/containers/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f/resolv.conf", "HostnamePath": "/var/lib/docker/containers/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f/hostname", "HostsPath": "/var/lib/docker/containers/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f/hosts", "LogPath": "/var/lib/docker/containers/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f-json.log", "Name": "/docker01", "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": [ 0, 0 ], "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/b00f9966214f9a057d1732bd90a2bc19d8b1fedeed3e8ed3fb699b5bca317b3c-init/diff:/var/lib/docker/overlay2/44f13cfae31a605a465441c1e094b1d581783bf4f928fd70a67bbba3bfc836b2/diff", "MergedDir": "/var/lib/docker/overlay2/b00f9966214f9a057d1732bd90a2bc19d8b1fedeed3e8ed3fb699b5bca317b3c/merged", "UpperDir": "/var/lib/docker/overlay2/b00f9966214f9a057d1732bd90a2bc19d8b1fedeed3e8ed3fb699b5bca317b3c/diff", "WorkDir": "/var/lib/docker/overlay2/b00f9966214f9a057d1732bd90a2bc19d8b1fedeed3e8ed3fb699b5bca317b3c/work" }, "Name": "overlay2" }, "Mounts": [ { "Type": "volume", "Name": "4f97acbe3e7898dd26c93908c71e274140d1b8645d7e5310c65f5031751b62f0", ****"Source": "/var/lib/docker/volumes/4f97acbe3e7898dd26c93908c71e274140d1b8645d7e5310c65f5031751b62f0/_data", "Destination": "/opt/demo",**** "Driver": "local", "Mode": "", "RW": true, "Propagation": "" } ], "Config": { "Hostname": "4ff466c1d17b", "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/bash" ], "Image": "centos", "Volumes": { "/opt/demo": {} }, "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": "91e5156145cfaa67d84d2fe265b1b924887179468dab266830dfb3cfb59e7401", "HairpinMode": false, "LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "Ports": {}, "SandboxKey": "/var/run/docker/netns/91e5156145cf", "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "EndpointID": "b8cd426f1e3a296bf96b6713a24c519452e313980a23878546add9f306f2f666", "Gateway": "172.17.0.1", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "172.17.0.3", "IPPrefixLen": 16, "IPv6Gateway": "", "MacAddress": "02:42:ac:11:00:03", "Networks": { "bridge": { "IPAMConfig": null, "Links": null, "Aliases": null, "NetworkID": "9741ca08001e6aa41459744be801eafabaabd121c25c1ae93184d965f501b5ae", "EndpointID": "b8cd426f1e3a296bf96b6713a24c519452e313980a23878546add9f306f2f666", "Gateway": "172.17.0.1", "IPAddress": "172.17.0.3", "IPPrefixLen": 16, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "MacAddress": "02:42:ac:11:00:03", "DriverOpts": null } } } }][root@iZbp1flzt6x7pxmxfhmxeeZ demo]#

可以看到匿名挂载，其实是自动挂载到宿主机的某个位置，通过上述命令可以准确的查询到

"Source": "/var/lib/docker/volumes/4f97acbe3e7898dd26c93908c71e274140d1b8645d7e5310c65f5031751b62f0/_data", "Destination": "/opt/demo",****

三、使用Dockerfile中Volume 匿名数据卷挂载方式

（1）编写内容如下的Dockerfile，保存文件名为Dockerfile

FROM centosMAINTAINER hitredrose@163.comVOLUME ["/opt/demo"]CMD /bin/bash

（2）使用Dockerfile编译一个docker镜像

[root@iZbp1flzt6x7pxmxfhmxeeZ home]# docker build -f Dockerfile -t redrose2100/centos:1.1 .Sending build context to Docker daemon 156.1MBStep 1/4 : FROM centos ---> 5d0da3dc9764Step 2/4 : MAINTAINER hitredrose@163.com ---> Running in d4f0bf0ee314Removing intermediate container d4f0bf0ee314 ---> e9fb5fb8c7a6Step 3/4 : VOLUME ["/opt/demo"] ---> Running in d85c7ad69107Removing intermediate container d85c7ad69107 ---> 9c2dba55a23dStep 4/4 : CMD /bin/bash ---> Running in e8cbd7c590ecRemoving intermediate container e8cbd7c590ec ---> 2184c3aadaabSuccessfully built 2184c3aadaabSuccessfully tagged redrose2100/centos:1.1[root@iZbp1flzt6x7pxmxfhmxeeZ home]#

（3）使用如下命令启动docker01

[root@iZbp1flzt6x7pxmxfhmxeeZ home]# docker run -it --name docker01 redrose2100/centos:1.1[root@a09fd22cbc42 /]# ls /opt/demo/[root@a09fd22cbc42 /]#

（4）启动docker02

[root@iZbp1flzt6x7pxmxfhmxeeZ ~]# docker run --name docker02 -it --volumes-from docker01 redrose2100/centos:1.1[root@8db2290977fd /]# ls /opt/demo/[root@8db2290977fd /]#

（5）启动docker03

[root@iZbp1flzt6x7pxmxfhmxeeZ ~]# docker run --name docker03 -it --volumes-from docker01 redrose2100/centos:1.1[root@5a755b99c988 /]# ls /opt/demo/[root@5a755b99c988 /]#

（6）在宿主机 /opt/demo/目录下创建一个文件

[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# touch test_docker.txt[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# lstest_docker.txt[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# pwd/opt/demo[root@iZbp1flzt6x7pxmxfhmxeeZ demo]#

（7）此时到三个docker容器中查看，发现三个容器的 /opt/demo 目录下均有创建的test_docker.txt文件，即做到了数据共享与同步

[root@6c84200b03e0 /]# ls /opt/demo/test_docker.txt[root@6c84200b03e0 /]#

（8）此时将docker01停掉，发现docker02和docker03的/opt/demo目录下得文件仍然不会丢失

[root@iZbp1flzt6x7pxmxfhmxeeZ opt]# docker psCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESb6b27b6b6d06 centos "/bin/bash" 18 minutes ago Up 18 minutes docker03aeefb255149a centos "/bin/bash" 19 minutes ago Up 19 minutes docker0291d5f6c93fa5 mysql:5.7 "docker-entrypoint.s…" 2 weeks ago Up 2 weeks 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql1906e95db7ab nginx "/docker-entrypoint.…" 2 weeks ago Up 19 hours 0.0.0.0:80->80/tcp, :::80->80/tcp nginx[root@iZbp1flzt6x7pxmxfhmxeeZ opt]#

容器docker02中的数据依然存在

[root@aeefb255149a /]# ls /opt/demo/test_docker.txt[root@aeefb255149a /]#

（9）通过如下命令可以查询到匿名挂载其实也是挂载到宿主机的具体一个位置的

[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# docker psCONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESf5cff0d857b2 centos "/bin/bash" About a minute ago Up About a minute docker03a36a479a87a1 centos "/bin/bash" 3 minutes ago Up 3 minutes docker024ff466c1d17b centos "/bin/bash" 4 minutes ago Up 4 minutes docker0191d5f6c93fa5 mysql:5.7 "docker-entrypoint.s…" 2 weeks ago Up 2 weeks 0.0.0.0:3306->3306/tcp, :::3306->3306/tcp, 33060/tcp mysql1906e95db7ab nginx "/docker-entrypoint.…" 2 weeks ago Up 19 hours 0.0.0.0:80->80/tcp, :::80->80/tcp nginx[root@iZbp1flzt6x7pxmxfhmxeeZ demo]# docker inspect 4ff466c1d17b[ { "Id": "4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f", "Created": "2021-10-27T09:34:32.465405207Z", "Path": "/bin/bash", "Args": [], "State": { "Status": "running", "Running": true, "Paused": false, "Restarting": false, "OOMKilled": false, "Dead": false, "Pid": 11728, "ExitCode": 0, "Error": "", "StartedAt": "2021-10-27T09:34:34.305904504Z", "FinishedAt": "0001-01-01T00:00:00Z" }, "Image": "sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6", "ResolvConfPath": "/var/lib/docker/containers/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f/resolv.conf", "HostnamePath": "/var/lib/docker/containers/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f/hostname", "HostsPath": "/var/lib/docker/containers/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f/hosts", "LogPath": "/var/lib/docker/containers/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f/4ff466c1d17b0e8ac266f54181149ba163e08e7720974a813f0310ddb1773e0f-json.log", "Name": "/docker01", "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": [ 0, 0 ], "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/b00f9966214f9a057d1732bd90a2bc19d8b1fedeed3e8ed3fb699b5bca317b3c-init/diff:/var/lib/docker/overlay2/44f13cfae31a605a465441c1e094b1d581783bf4f928fd70a67bbba3bfc836b2/diff", "MergedDir": "/var/lib/docker/overlay2/b00f9966214f9a057d1732bd90a2bc19d8b1fedeed3e8ed3fb699b5bca317b3c/merged", "UpperDir": "/var/lib/docker/overlay2/b00f9966214f9a057d1732bd90a2bc19d8b1fedeed3e8ed3fb699b5bca317b3c/diff", "WorkDir": "/var/lib/docker/overlay2/b00f9966214f9a057d1732bd90a2bc19d8b1fedeed3e8ed3fb699b5bca317b3c/work" }, "Name": "overlay2" }, "Mounts": [ { "Type": "volume", "Name": "4f97acbe3e7898dd26c93908c71e274140d1b8645d7e5310c65f5031751b62f0", ****"Source": "/var/lib/docker/volumes/4f97acbe3e7898dd26c93908c71e274140d1b8645d7e5310c65f5031751b62f0/_data", "Destination": "/opt/demo",**** "Driver": "local", "Mode": "", "RW": true, "Propagation": "" } ], "Config": { "Hostname": "4ff466c1d17b", "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/bash" ], "Image": "centos", "Volumes": { "/opt/demo": {} }, "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": "91e5156145cfaa67d84d2fe265b1b924887179468dab266830dfb3cfb59e7401", "HairpinMode": false, "LinkLocalIPv6Address": "", "LinkLocalIPv6PrefixLen": 0, "Ports": {}, "SandboxKey": "/var/run/docker/netns/91e5156145cf", "SecondaryIPAddresses": null, "SecondaryIPv6Addresses": null, "EndpointID": "b8cd426f1e3a296bf96b6713a24c519452e313980a23878546add9f306f2f666", "Gateway": "172.17.0.1", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "IPAddress": "172.17.0.3", "IPPrefixLen": 16, "IPv6Gateway": "", "MacAddress": "02:42:ac:11:00:03", "Networks": { "bridge": { "IPAMConfig": null, "Links": null, "Aliases": null, "NetworkID": "9741ca08001e6aa41459744be801eafabaabd121c25c1ae93184d965f501b5ae", "EndpointID": "b8cd426f1e3a296bf96b6713a24c519452e313980a23878546add9f306f2f666", "Gateway": "172.17.0.1", "IPAddress": "172.17.0.3", "IPPrefixLen": 16, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0, "MacAddress": "02:42:ac:11:00:03", "DriverOpts": null } } } }][root@iZbp1flzt6x7pxmxfhmxeeZ demo]#

可以看到匿名挂载，其实是自动挂载到宿主机的某个位置，通过上述命令可以准确的查询到

"Source": "/var/lib/docker/volumes/4f97acbe3e7898dd26c93908c71e274140d1b8645d7e5310c65f5031751b62f0/_data", "Destination": "/opt/demo",****

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