Docker入门之路（六）：容器数据卷

引言

如果对Docker不太熟悉的小伙伴们可以先去看一下Docker入门，再来看这篇文章哟！
https://blog.youkuaiyun.com/m0_53559551/article/details/121358336
那么如果是从我Docker入门文章过来的或者是对Docker有个基本了解的小伙伴们现在跟我一起学习一下Docker的容器数据卷吧。

什么是容器数据卷？

如果数据在容器中，那么删除容器后数据也跟着删除了，那么我们不希望数据也跟着丢失，就需要数据持久化，这时就要用的容器数据卷，Docker容器中产生的数据会跟着同步到本地，也就是目录的挂载，容器中的目录挂载到本地。

使用容器数据卷

直接使用命令挂载 -v

docker run -it -v 主机目录：容器内目录

PS C:\home> docker run -it -v /home/ceshi:/home centos /bin/bash
Unable to find image 'centos:latest' locally
latest: Pulling from library/centos
a1d0c7532777: Pull complete                                                                                             
Digest: sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177
Status: Downloaded newer image for centos:latest

接下来看下是否挂载上了

PS C:\home> docker inspect c41a549b0655
[
    {
        "Id": "c41a549b065575493d52dfb2aa08fc1a0a4acd46fc0ec50f72dd124058f846ec",
        "Created": "2021-11-29T08:16:49.35722Z",
        "Path": "/bin/bash",
        "Args": [],
        "State": {
            "Status": "running",
            "Running": true,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 1546,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2021-11-29T08:16:51.9560701Z",
            "FinishedAt": "0001-01-01T00:00:00Z"
        },
        "Image": "sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6",
        "ResolvConfPath": "/var/lib/docker/containers/c41a549b065575493d52dfb2aa08fc1a0a4acd46fc0ec50f72dd124058f846ec/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/c41a549b065575493d52dfb2aa08fc1a0a4acd46fc0ec50f72dd124058f846ec/hostname",
        "HostsPath": "/var/lib/docker/containers/c41a549b065575493d52dfb2aa08fc1a0a4acd46fc0ec50f72dd124058f846ec/hosts",
        "LogPath": "/var/lib/docker/containers/c41a549b065575493d52dfb2aa08fc1a0a4acd46fc0ec50f72dd124058f846ec/c41a549b065575493d52dfb2aa08fc1a0a4acd46fc0ec50f72dd124058f846ec-json.log",
        "Name": "/jovial_torvalds",
        "RestartCount": 0,
        "Driver": "overlay2",
        "Platform": "linux",
        "MountLabel": "",
        "ProcessLabel": "",
        "AppArmorProfile": "",
        "ExecIDs": null,
        "HostConfig": {
            "Binds": [
                "/home/ceshi:/home"
            ],
            "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": [
                50,
                120
            ],
            "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/f5e86750de02f45236e523870ddd3a53319ad2fd24849e34fbbb60fafebf7807-init/diff:/var/lib/docker/overlay2/4c9e39e6a74ffc64a7d06d6aec6d31a73ded79645671bcae69e357817c362d32/diff",
                "MergedDir": "/var/lib/docker/overlay2/f5e86750de02f45236e523870ddd3a53319ad2fd24849e34fbbb60fafebf7807/merged",
                "UpperDir": "/var/lib/docker/overlay2/f5e86750de02f45236e523870ddd3a53319ad2fd24849e34fbbb60fafebf7807/diff",
                "WorkDir": "/var/lib/docker/overlay2/f5e86750de02f45236e523870ddd3a53319ad2fd24849e34fbbb60fafebf7807/work"
            },
            "Name": "overlay2"
        },
        "Mounts": [
            {
                "Type": "bind",
                "Source": "/home/ceshi",
                "Destination": "/home",
                "Mode": "",
                "RW": true,
                "Propagation": "rprivate"
            }
        ],
        "Config": {
            "Hostname": "c41a549b0655",
            "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": null,
            "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": "481615ddea80e186624c00093a59d1048b4be6feed52f4b6023ee94ce29b8cf7",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {},
            "SandboxKey": "/var/run/docker/netns/481615ddea80",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "cd1336cee04dff3372b59e50a92da5dc3d98d6cc89c9d9a713d0b3731f2a2c0a",
            "Gateway": "172.17.0.1",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "172.17.0.2",
            "IPPrefixLen": 16,
            "IPv6Gateway": "",
            "MacAddress": "02:42:ac:11:00:02",
            "Networks": {
                "bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "NetworkID": "0f01c6319ec1fb1bb8534fb25e88a6a70a5031c71623ecc3f4b108fcf586ae6a",
                    "EndpointID": "cd1336cee04dff3372b59e50a92da5dc3d98d6cc89c9d9a713d0b3731f2a2c0a",
                    "Gateway": "172.17.0.1",
                    "IPAddress": "172.17.0.2",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:11:00:02",
                    "DriverOpts": null
                }
            }
        }
    }
]

“Mounts”: [
{
“Type”: “bind”,
“Source”: “/home/ceshi”,
“Destination”: “/home”,
“Mode”: “”,
“RW”: true,
“Propagation”: “rprivate”
}
],

这一段就证明他们已经挂载上了！！！小伙伴们可以在主机/home/ceshi里加内容或者容器的/home加内容，他们的数据都会同步，这一点可以理解为双向绑定！