docker 容器间数据同步 --volumes-from 指定父容器 子容器 有点像主从复制

十年河东，十年河西，莫欺少年穷

学无止境，精益求精

接着上篇博客：docker 镜像的生成方式，初识dockerfile，dockerfile 指定匿名挂载

废话不想多说，心情不好，直接上

1、查看镜像

docker images

镜像如下：

2、查看容器

 

 3、新建一个容器，并通过 --volumes-from 指定父容器，实现数据卷挂载共享

docker run -it --name mydockerimages02 --volumes-from 7ff053ebd0af  38f5719bab58 /bin/bash

4、退出容器，在新建一个名称为： mydockerimages03 的容器

exit
docker run -it --name mydockerimages03 --volumes-from 7ff053ebd0af  38f5719bab58 /bin/bash

5、查看数据是否共享成功

[root@23a93bcd984c /]# ls
bin  dev  etc  home  lib  lib64  lost+found  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var  volume01    volume02
[root@23a93bcd984c /]# ls /volume02
02.txt
[root@23a93bcd984c /]# cat /volume02/02.txt
I iove shaofu

02.txt 的内容为  i iove saofu 表示，数据共享成功

6、查看容器 03 的挂载信息

[root@localhost dockerfiles]# docker inspect 23a93bcd984c
[
    {
        "Id": "23a93bcd984cf5f35eb6ef81197498f8fdac5eb11d18c549cdd9a7f17f5eaf5a",
        "Created": "2022-04-08T08:18:35.339506509Z",
        "Path": "/bin/bash",
        "Args": [],
        "State": {
            "Status": "exited",
            "Running": false,
            "Paused": false,
            "Restarting": false,
            "OOMKilled": false,
            "Dead": false,
            "Pid": 0,
            "ExitCode": 0,
            "Error": "",
            "StartedAt": "2022-04-08T08:18:35.920809835Z",
            "FinishedAt": "2022-04-08T08:22:19.557677364Z"
        },
        "Image": "sha256:38f5719bab581ccd7c7ca0ee03bc7787de5d875713d751c6a4e2f9c24b9dc867",
        "ResolvConfPath": "/var/lib/docker/containers/23a93bcd984cf5f35eb6ef81197498f8fdac5eb11d18c549cdd9a7f17f5eaf5a/resolv.conf",
        "HostnamePath": "/var/lib/docker/containers/23a93bcd984cf5f35eb6ef81197498f8fdac5eb11d18c549cdd9a7f17f5eaf5a/hostname",
        "HostsPath": "/var/lib/docker/containers/23a93bcd984cf5f35eb6ef81197498f8fdac5eb11d18c549cdd9a7f17f5eaf5a/hosts",
        "LogPath": "/var/lib/docker/containers/23a93bcd984cf5f35eb6ef81197498f8fdac5eb11d18c549cdd9a7f17f5eaf5a/23a93bcd984cf5f35eb6ef81197498f8fdac5eb11d18c549cdd9a7f17f5eaf5a-json.log",
        "Name": "/mydockerimages03",
        "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": [
                "7ff053ebd0af"
            ],
            "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/overlay2/1034e81c0db89890906dee2a0781de3dece55db77abc3754761780ec36b34aa3-init/diff:/var/lib/docker/overlay2/cf1e13089623186798352e30e58b8fd15ad716904a8a5442bd9c1ad57f8484cb/diff",
                "MergedDir": "/var/lib/docker/overlay2/1034e81c0db89890906dee2a0781de3dece55db77abc3754761780ec36b34aa3/merged",
                "UpperDir": "/var/lib/docker/overlay2/1034e81c0db89890906dee2a0781de3dece55db77abc3754761780ec36b34aa3/diff",
                "WorkDir": "/var/lib/docker/overlay2/1034e81c0db89890906dee2a0781de3dece55db77abc3754761780ec36b34aa3/work"
            },
            "Name": "overlay2"
        },
        "Mounts": [
            {
                "Type": "volume",
                "Name": "06154073d94c9c6138b9b2c46d2021b5de9a4d972a634d3143536844f7a10f98",
                "Source": "/var/lib/docker/volumes/06154073d94c9c6138b9b2c46d2021b5de9a4d972a634d3143536844f7a10f98/_data",
                "Destination": "volume01",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            },
            {
                "Type": "volume",
                "Name": "177b53a05672781ba288ff566397f0291679c402437c8052d151c039f24421e2",
                "Source": "/var/lib/docker/volumes/177b53a05672781ba288ff566397f0291679c402437c8052d151c039f24421e2/_data",
                "Destination": "volume02",
                "Driver": "local",
                "Mode": "",
                "RW": true,
                "Propagation": ""
            }
        ],
        "Config": {
            "Hostname": "23a93bcd984c",
            "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": "38f5719bab58",
            "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": "37d5bcb4d7115fd615456026286e3fad7a68576b0e0e7b0be7387da879c68239",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "Ports": {},
            "SandboxKey": "/var/run/docker/netns/37d5bcb4d711",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "EndpointID": "",
            "Gateway": "",
            "GlobalIPv6Address": "",
            "GlobalIPv6PrefixLen": 0,
            "IPAddress": "",
            "IPPrefixLen": 0,
            "IPv6Gateway": "",
            "MacAddress": "",
            "Networks": {
                "bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "NetworkID": "bbd98b26ca3e8fbfcdc5f8e7ebe4d491c296c4c5128d492f49c980d83029e4be",
                    "EndpointID": "",
                    "Gateway": "",
                    "IPAddress": "",
                    "IPPrefixLen": 0,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "",
                    "DriverOpts": null
                }
            }
        }
    }
]
[root@localhost dockerfiles]# 

 

 三个容器中 无论修改那么数据卷的文件内容，信息都会同步修改。

即使你把容器删完，在linux本地的文件也不会删除

@天才卧龙的博客