docker——存储配置与管理

docker存储配置与管理

查看docker info

[root@hmm overlay2]# docker info
Client: Docker Engine - Community
 Version:    25.0.3
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.12.1
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.24.6
    Path:     /usr/libexec/docker/cli-plugins/docker-compose

Server:
 Containers: 1
  Running: 0
  Paused: 0
  Stopped: 1
 Images: 5
 Server Version: 25.0.3
 Storage Driver: overlay2
  Backing Filesystem: xfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: ae07eda36dd25f8a1b98dfbf587313b99c0190bb
 runc version: v1.1.12-0-g51d5e94
 init version: de40ad0
 Security Options:
  seccomp
   Profile: builtin
 Kernel Version: 3.10.0-862.el7.x86_64
 Operating System: CentOS Linux 7 (Core)
 OSType: linux
 Architecture: x86_64
 CPUs: 1
 Total Memory: 1.936GiB
 Name: hmm
 ID: ef4c910e-c299-4bde-b4b8-e6bd39ec99ee
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Registry Mirrors:
  http://registry.docker-cn.com/
 Live Restore Enabled: false

WARNING: API is accessible on http://0.0.0.0:2375 without encryption.
         Access to the remote API is equivalent to root access on the host. Refer
         to the 'Docker daemon attack surface' section in the documentation for
         more information: https://docs.docker.com/go/attack-surface/
[root@hmm overlay2]#

查看驱动的本地存储

[root@hmm ~]# ls /var/lib/docker/
buildkit  containers  engine-id  image  network  overlay2  plugins  runtimes  swarm  tmp  volumes
[root@hmm ~]# cd  /var/lib/docker/
[root@hmm docker]# cd overlay2/
[root@hmm overlay2]# ls
26625907d00815747e8cac482a1a62ff06e153543cf914c4edf95d0846b15ec5
3d8c300ff053bd2ca4e62612c8209dd2e8358845228b4a76aab105358afa37ab
51056850a6566edcd8c8e3a0cd507cb4ca421463e18203782c4aa8515dabc146
51056850a6566edcd8c8e3a0cd507cb4ca421463e18203782c4aa8515dabc146-init
5ef601e966da6df616f65b262570adbb5733017d770d94c5bc8c7e6b188ad881
7987fae3b1b5590b9c0d4d8e38011c6715df2026231afe3c37382200b9b1a1ff
97l4r6nxwu2mpz0n0cxlr973v
backingFsBlockDev
db0600235154dccf95a6a3ad038fe630024448364895e81409ccb072c07269e2
e41egh7ju6i7x0o7qrvk4gy4k
f7c270ad6461a794e6e169c944fdd2cb6d13456859100d83d9a6937c1ee5dbb7
hyqu74kjsemkx24bv71cfyhqk
l
lgnbtonjnna4nt95y2ume8l5i
[root@hmm overlay2]#

修改damon.json文件，更改存储驱动

[root@hmm overlay2]# cat /etc/docker/daemon.json 
{
  "registry-mirrors":["http://registry.docker-cn.com"],
   "storage-driver": "vfs"
}
[root@hmm overlay2]# docker info |grep storage 
WARNING: API is accessible on http://0.0.0.0:2375 without encryption.
         Access to the remote API is equivalent to root access on the host. Refer
         to the 'Docker daemon attack surface' section in the documentation for
         more information: https://docs.docker.com/go/attack-surface/
[root@hmm overlay2]# docker info |grep vfs 
WARNING: API is accessible on http://0.0.0.0:2375 without encryption.
         Access to the remote API is equivalent to root access on the host. Refer
         to the 'Docker daemon attack surface' section in the documentation for
         more information: https://docs.docker.com/go/attack-surface/
 Storage Driver: vfs //更改成功
[root@hmm overlay2]#

docker存储驱动

卷

[root@hmm ~]# docker volume --help

Usage:  docker volume COMMAND

Manage volumes

Commands:
  create      Create a volume
  inspect     Display detailed information on one or more volumes
  ls          List volumes
  prune       Remove unused local volumes
  rm          Remove one or more volumes

Run 'docker volume COMMAND --help' for more information on a command.
[root@hmm ~]# docker volume create --help

Usage:  docker volume create [OPTIONS] [VOLUME]  //不写名字就是匿名卷

Create a volume

Options:
  -d, --driver string   Specify volume driver name (default "local")
      --label list      Set metadata for a volume   //设置卷的源数据
  -o, --opt map         Set driver specific options (default map[]) //指定卷的大小，使用什么方式进行挂载，驱动等
  1. 创建一个普通卷
root@hmm ~]# docker volume ls
DRIVER    VOLUME NAME
[root@hmm ~]# docker volume create test-vol1
test-vol1
[root@hmm ~]# docker volume inspect test-vol1
[
    {
        "CreatedAt": "2024-04-24T00:42:49+08:00",
        "Driver": "local",
        "Labels": null,
        "Mountpoint": "/var/lib/docker/volumes/test-vol1/_data",
        "Name": "test-vol1",
        "Options": null,
        "Scope": "local"
    }
]
[root@hmm ~]# 

[root@hmm ~]# cd /var/lib/docker/volumes/
[root@hmm volumes]# ls
backingFsBlockDev  metadata.db  test-vol1
[root@hmm volumes]# cd test-vol1/
[root@hmm test-vol1]# ls
_data
[root@hmm test-vol1]# cd _data/
[root@hmm _data]# ls
[root@hmm _data]# touch yun3_test
[root@hmm _data]# ls
yun3_test
  1. 创建一tmpfs卷
[root@hmm _data]# docker volume create --driver local --opt type=tmpfs --opt device=,uid=1000 teste-vol2
teste-vol2
[root@hmm _data]# docker volume inspect teste-vol2
[
    {
        "CreatedAt": "2024-04-24T01:00:21+08:00",
        "Driver": "local",
        "Labels": null,
        "Mountpoint": "/var/lib/docker/volumes/teste-vol2/_data",
        "Name": "teste-vol2",
        "Options": {
            "device": "tmpfs",
            "o": "size=100m,uid=1000",
            "type": "tmpfs"
        },
        "Scope": "local"
    }
]
  1. 创建带元数据的卷
[root@hmm _data]# docker volume create --label class=yun3 \
> --label age=20 \
> test-vol3
test-vol3
[root@hmm _data]# docker volume inspect test-vol3
[
    {
        "CreatedAt": "2024-04-24T01:01:49+08:00",
        "Driver": "local",
        "Labels": {
            "age": "20",
            "class": "yun3"
        },
        "Mountpoint": "/var/lib/docker/volumes/test-vol3/_data",
        "Name": "test-vol3",
        "Options": null,
        "Scope": "local"
    }
]

查看卷

  • 普通查看
[root@hmm _data]# docker volume ls
DRIVER    VOLUME NAME
local     421a92d5fae8a818a2dfdae251f86d23d62b0a02d26134836d7140bbb63a7e76
local     73401cb13134c689095a345c85ad635862c5e16eac4ea3c1c9402f6a85b38bf6
local     test-vol1
local     test-vol3
local     teste-vol2
  • 简单筛选
[root@hmm _data]# docker volume ls -f label=age //筛选标签含age的卷
DRIVER    VOLUME NAME
local     test-vol3
[root@hmm _data]# docker volume ls -f name=vol
DRIVER    VOLUME NAME
local     test-vol1
local     test-vol3
local     teste-vol2
[root@hmm _data]# docker volume ls -f name=vo3
DRIVER    VOLUME NAME
[root@hmm _data]# docker volume ls -f name=3
DRIVER    VOLUME NAME
local     421a92d5fae8a818a2dfdae251f86d23d62b0a02d26134836d7140bbb63a7e76
local     73401cb13134c689095a345c85ad635862c5e16eac4ea3c1c9402f6a85b38bf6
local     test-vol3
  • 只显示名字
[root@hmm _data]# docker volume ls -q
421a92d5fae8a818a2dfdae251f86d23d62b0a02d26134836d7140bbb63a7e76
73401cb13134c689095a345c85ad635862c5e16eac4ea3c1c9402f6a85b38bf6
test-vol1
test-vol3
teste-vol2
[root@hmm _data]#
  • 普通格式化输出
[root@hmm _data]# docker volume ls --format "{{.Name}}***{{.Scope}}***{{.Mountpoint}}"
421a92d5fae8a818a2dfdae251f86d23d62b0a02d26134836d7140bbb63a7e76***local***/var/lib/docker/volumes/421a92d5fae8a818a2dfdae251f86d23d62b0a02d26134836d7140bbb63a7e76/_data
73401cb13134c689095a345c85ad635862c5e16eac4ea3c1c9402f6a85b38bf6***local***/var/lib/docker/volumes/73401cb13134c689095a345c85ad635862c5e16eac4ea3c1c9402f6a85b38bf6/_data
test-vol1***local***/var/lib/docker/volumes/test-vol1/_data
test-vol3***local***/var/lib/docker/volumes/test-vol3/_data
teste-vol2***local***/var/lib/docker/volumes/teste-vol2/_data
[root@hmm _data]#
  • json格式 格式化输出
[root@hmm _data]# docker volume ls --format "{{json .Name}}***{{json .Scope}}***{{json .Mountpoint}}"
"421a92d5fae8a818a2dfdae251f86d23d62b0a02d26134836d7140bbb63a7e76"***"local"***"/var/lib/docker/volumes/421a92d5fae8a818a2dfdae251f86d23d62b0a02d26134836d7140bbb63a7e76/_data"
"73401cb13134c689095a345c85ad635862c5e16eac4ea3c1c9402f6a85b38bf6"***"local"***"/var/lib/docker/volumes/73401cb13134c689095a345c85ad635862c5e16eac4ea3c1c9402f6a85b38bf6/_data"
"test-vol1"***"local"***"/var/lib/docker/volumes/test-vol1/_data"
"test-vol3"***"local"***"/var/lib/docker/volumes/test-vol3/_data"
"teste-vol2"***"local"***"/var/lib/docker/volumes/teste-vol2/_data"
[root@hmm _data]#

整合（tmpfs类型的卷并查看）

[root@hmm ~]# docker volume create  --driver local --opt type=tmpfs --opt device=tmpfs --opt o=size=100m,uid=1000 --label school=hbkj --label type=tmpfs yum3-vol
yum3-vol
[root@hmm ~]# docker volume inspect yum3-vol
[
    {
        "CreatedAt": "2024-04-24T01:24:35+08:00",
        "Driver": "local",
        "Labels": {
            "school": "hbkj",
            "type": "tmpfs"
        },
        "Mountpoint": "/var/lib/docker/volumes/yum3-vol/_data",
        "Name": "yum3-vol",
        "Options": {
            "device": "tmpfs",
            "o": "size=100m,uid=1000",
            "type": "tmpfs"
        },
        "Scope": "local"
    }
]
[root@hmm ~]# docker volume inspect yum3-vol --format "{{.Labels}}" 
map[school:hbkj type:tmpfs]
[root@hmm ~]# docker volume inspect yum3-vol --format "{{.Options.o}}" 
size=100m,uid=1000

卷的删除

  • 普通删除
[root@hmm ~]# docker volume rm
  • 批量删除
[root@hmm ~]# docker volume rm $(docker volume ls -q)
421a92d5fae8a818a2dfdae251f86d23d62b0a02d26134836d7140bbb63a7e76
73401cb13134c689095a345c85ad635862c5e16eac4ea3c1c9402f6a85b38bf6
test-vol1
test-vol3
teste-vol2
yum3-vol
[root@hmm ~]#
  • 删除没有被使用的卷
[root@hmm ~]# docker volume ls
DRIVER    VOLUME NAME
local     1e178a48a255713f49ade0accaf6c9b1bef0d066533aaec8a90e67eb5a9365b9
local     6aace89bcae20a35d71b915fce665af35d8507080f557290c0a5154af361f6c2
local     c84db42866fff653c3f98d8d0cbde8edce0a58bef2dc9206966ad6a3a4d4ec3f
local     f46a96daf31613f649951726b12447484faedb6c76ee331baba3b98597429125
local     fb8d3a9e08451fb44e6d8474a8e780a1418ef15bf3921903c63b12384730c9cb
local     yum3-vol1
local     yum3-vol2
local     yum3-vol3
[root@hmm ~]# docker volume prune
WARNING! This will remove anonymous local volumes not used by at least one container.   //是否要删除未命名的卷(没有被容器使用的)
Are you sure you want to continue? [y/N] y
Deleted Volumes:
c84db42866fff653c3f98d8d0cbde8edce0a58bef2dc9206966ad6a3a4d4ec3f
6aace89bcae20a35d71b915fce665af35d8507080f557290c0a5154af361f6c2
fb8d3a9e08451fb44e6d8474a8e780a1418ef15bf3921903c63b12384730c9cb
1e178a48a255713f49ade0accaf6c9b1bef0d066533aaec8a90e67eb5a9365b9
f46a96daf31613f649951726b12447484faedb6c76ee331baba3b98597429125

Total reclaimed space: 0B
[root@hmm ~]# docker volume ls
DRIVER    VOLUME NAME
local     yum3-vol1
local     yum3-vol2
local     yum3-vol3
[root@hmm ~]#
  • 删除有city label的卷
[root@hmm ~]# docker volume create --label city=wuhan
893fe29eef0b484b74f6daab40a655da58b292efc3b2917e539d9ab9b06ac22c
[root@hmm ~]# docker volume create --label city=wuhan
5411c3b489b3f248f245a769068c28aa5b7d2518072867573b65a5cb18909171
[root@hmm ~]# docker volume create --label city=wuhan
2053dc378e4736716c6c86f9dabefeca8189c2895aebaf370f174af309f98a22
[root@hmm ~]# docker volume create --label school=hbkj
ffcdce53e993f14dec484c9387f49f072977ad1ce7ba85d9635eae43582fe83f
[root@hmm ~]# docker volume prune --filter label=city
WARNING! This will remove anonymous local volumes not used by at least one container.
Are you sure you want to continue? [y/N] y
Deleted Volumes:
893fe29eef0b484b74f6daab40a655da58b292efc3b2917e539d9ab9b06ac22c
5411c3b489b3f248f245a769068c28aa5b7d2518072867573b65a5cb18909171
2053dc378e4736716c6c86f9dabefeca8189c2895aebaf370f174af309f98a22

Total reclaimed space: 0B
[root@hmm ~]# docker volume ls
DRIVER    VOLUME NAME
local     ffcdce53e993f14dec484c9387f49f072977ad1ce7ba85d9635eae43582fe83f
local     yum3-vol1
local     yum3-vol2
local     yum3-vol3
[root@hmm ~]#

绑定挂载（容器文件系统的挂载）

使用docker run 和docker create 命令

  • 对于早期docker来说：
    1.卷和绑定挂载都可以通过-v,和--mount选项挂载到容器
    2.-v一般用于独立容器，--mount一般用于集群服务
    3.tmpfs挂载可以使用 --tmpfs选项
  • docker 17.06或更高版本：
    1.建议使用--mount选项,因为它的语法清晰，定制详细
    2.--mount选项也用于独立容器

对比

  1. -v是将选项组合在一个字段，--mount是将它们分开
  2. --mount采用键值对写法，支持更多的选项
  3. -v写法简洁

-v选项

image
可选选项：

  • rw 读写模式
  • ro 只读模式
  • nocopy 禁止自动复制到卷存储
    实例：
    1.卷挂载给容器
[root@hqs-docker ~]# docker volume create test-vol
test-vol
[root@hqs-docker ~]# docker volume ls
DRIVER    VOLUME NAME
local     test-vol
[root@hqs-docker ~]# docker run -ti -v test-vol:/world ubuntu /bin/bash
root@1cba22eb5a0e:/# ls
bin   dev  home  lib32  libx32  mnt  proc  run   srv  tmp  var
boot  etc  lib   lib64  media   opt  root  sbin  sys  usr  world

2.挂载一个只读的卷

[root@hmm ~]# docker volume ls
DRIVER    VOLUME NAME
local     test-vol
[root@hmm ~]# docker run -tid --name test-or -v test-vol:/world:ro centos 
d0ef668fa014863c7b5f224593e3bd3856af24aaf2bc51e7bef58bab919f8686
[root@hmm ~]# docker exec -ti test-or /bin/bash
[root@d0ef668fa014 /]# cd /world/
[root@d0ef668fa014 world]# ls
aaa.txt
[root@d0ef668fa014 world]# touvh lll.txt
bash: touvh: command not found    // 报错！！！因为这个是一个只读的卷
[root@d0ef668fa014 world]#

--mount选项

image
特殊的键：

  • type
  • souce（src）
  • destination（sat，target）
  • readonly

案例：

  1. 普通案例：
[root@hmm ~]# docker run -tid --name test01 --mount source=test-vol,target=/app \
> centos
8b1c4a5677552cb54227eb21da671ee6952f0d54d2f8978a85404db10ed893a9
[root@hmm ~]# docker volume inspect test-vol
[
    {
        "CreatedAt": "2024-04-24T02:42:13+08:00",
        "Driver": "local",
        "Labels": null,
        "Mountpoint": "/var/lib/docker/volumes/test-vol/_data",
        "Name": "test-vol",
        "Options": null,
        "Scope": "local"
    }
]
[root@hmm ~]# docker exec -ti test01 /bin/bash
[root@8b1c4a567755 /]# cd app/
[root@8b1c4a567755 app]# touch yun3
[root@8b1c4a567755 app]# ls
aaa.txt  yun3
[root@8b1c4a567755 app]#

2.创建只读卷

[root@hmm ~]# docker run -tid --name test02 --mount source=test-vol2,target=/app,readonly centos
5f713ee2925b0ef30843c634c5587cec1d804cf2386372ff1a0f79c5b1f44359
[root@hmm ~]# docker exec -ti test02 /bin/bash
[root@5f713ee2925b /]# cd app/
[root@5f713ee2925b app]# touch aaaa
touch: cannot touch 'aaaa': Read-only file system
[root@5f713ee2925b app]#
# --mount 的时候只读使用ro
# -v 的时候只读使用--readonly
  1. 当你的卷没有创建的时候，你直接run开一个容器，那么它会自动生成卷。
******
-- mount
-v
各写一个

image

绑定挂载（本地文件）

实例：

  1. 绑定主机上的目录
  • --mount
[root@hmm-docker ~]# mkdir -p source/target
[root@hmm-docker ~]# ls
anaconda-ks.cfg  docker-hello  source  yun1-centos  yun3-centos
[root@hmm-docker ~]# cd source/
[root@hmm-docker source]# ls
target
[root@hmm-docker source]# docker run -tid --name devtest  --mount type=bind,source="$(pwd)"/target,target=/app nginx
3d6aabb4d417de6d2e4e06026b8c7159d7a0c037958a74ec3d3100927377f89c
[root@hmm-docker source]# docker inspect devtest --format "{{json .Mounts}}"
[{"Type":"bind","Source":"/root/source/target","Destination":"/app","Mode":"","RW":true,"Propagation":"rprivate"}]
[root@hmm-docker source]# touch target/yun3.txt
[root@hmm-docker source]# docker exec -ti devtest /bin/bash
root@3d6aabb4d417:/# cd /app/
root@3d6aabb4d417:/app# ls
yun3.txt
root@3d6aabb4d417:/app# exit
exit
  • -v
[root@hmm-docker source]# docker run -tid --name devtest2 -v "$(pwd)"/target:/app  nginx
1f7769b4dd4ee35779156ef841efb46c2e61b1d091983d4f1c7023c6463ecd8f
[root@hmm-docker source]# docker exec -ti devtest02 /bin/bash
Error response from daemon: No such container: devtest02
[root@hmm-docker source]# docker exec -ti devtest2 /bin/bash
root@1f7769b4dd4e:/# cd /app/
root@1f7769b4dd4e:/app# ls
yun3.txt
root@1f7769b4dd4e:/app# exit
exit
[root@hmm-docker source]# docker inspect devtest2 --format "{{json .mounts}}"

template parsing error: template: :1:7: executing "" at <.mounts>: map has no entry for key "mounts"
[root@hmm-docker source]# docker inspect devtest2 --format "{{json .Mounts}}"
[{"Type":"bind","Source":"/root/source/target","Destination":"/app","Mode":"","RW":true,"Propagation":"rprivate"}]
  • 对比，两种创建方法的效果是一样的
[root@hmm-docker source]# docker inspect devtest --format "{{json .Mounts}}"
[{"Type":"bind","Source":"/root/source/target","Destination":"/app","Mode":"","RW":true,"Propagation":"rprivate"}]
[root@hmm-docker source]# docker inspect devtest2 --format "{{json .Mounts}}"
[{"Type":"bind","Source":"/root/source/target","Destination":"/app","Mode":"","RW":true,"Propagation":"rprivate"}]
# 对比，两种方法是一样的

3，绑定挂载时区

[root@hmm-docker source]# date +%z
+0800  //
[root@hmm-docker source]# docker run --rm -ti  --name test ubuntu  /bin/bash
root@fb955317ef53:/# date +%z
+0000
root@fb955317ef53:/# exit
exit
[root@hmm-docker source]# docker run --rm -ti  --name test --mount type=bind,source=/etc/localtime,target=/etc/localtime  ubuntu  /bin/bash
root@ec7e5c3ce736:/# date +%z
+0800
root@ec7e5c3ce736:/#

该操作可用来绑定配置文件
4. 绑定挂载当前主机上不存在的文件

  • -v
[root@hmm-docker /]# cd /
[root@hmm-docker /]# ls
bin   dev  home  lib64  mnt  proc  run   srv  tmp  var
boot  etc  lib   media  opt  root  sbin  sys  usr
[root@hmm-docker /]# docker run -ti --rm -v /doesnt/exist.txt:/foo ubuntu
root@a3c4d1ef5c82:/# ls
bin   dev  foo   lib    lib64   media  opt   root  sbin  sys  usr
boot  etc  home  lib32  libx32  mnt    proc  run   srv   tmp  var
root@a3c4d1ef5c82:/# cd foo/
root@a3c4d1ef5c82:/foo# ls
root@a3c4d1ef5c82:/foo# touch aaa
root@a3c4d1ef5c82:/foo# ls
aaa
root@a3c4d1ef5c82:/foo# cd ..
root@a3c4d1ef5c82:/# exit
exit
[root@hmm-docker /]# cd doesnt/
[root@hmm-docker doesnt]# ls
exist.txt
[root@hmm-docker doesnt]# cd exist.txt/
[root@hmm-docker exist.txt]# ls
aaa
[root@hmm-docker exist.txt]#
  • --mount
[root@hmm-docker exist.txt]# docker run -ti --rm --mount type=bind,source=/doesnt/exist3,target=/foo/  ubuntu
docker: Error response from daemon: invalid mount config for type "bind": bind source path does not exist: /doesnt/exist3.
See 'docker run --help'.
# --mount 不能够进行不存在的目录或文件的挂载
  • 对比
    -v 会自动创建出来，--mount 直接报错
  • 注意： -v自动创建非存在的挂载点的时候，只能自动创建目录（创建不了文件）
  1. 绑定挂载到容器中的非空目录
  • v
[root@hmm-docker /]# docker run -ti --rm --name broken-test -v /root:/etc/yum.repos.d centos
[root@f45442267e77 /]# cd /etc/yum.repos.d/
[root@f45442267e77 yum.repos.d]# ls
--mount		 centos        source	    yun3-centos
anaconda-ks.cfg  docker-hello  yun1-centos
[root@f45442267e77 yum.repos.d]#
  • -- mount
[root@hmm-docker /]# docker run -ti --rm --name broken-test --mount  type=bind,source=/root,target=/etc/yum.repos.d centos
[root@e78a0817f468 /]# cd /etc/yum.repos.d/
[root@e78a0817f468 yum.repos.d]# ls
--mount		 centos        source	    yun3-centos
anaconda-ks.cfg  docker-hello  yun1-centos
[root@e78a0817f468 yum.repos.d]#
  1. 卷容器，一种特殊的容器，专门用来将卷（或绑定挂载）提供给其他容器挂载。
[root@hmm-docker /]# docker ps -a
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
[root@hmm-docker /]# docker volume ls
DRIVER    VOLUME NAME
[root@hmm-docker /]# 
[root@hmm-docker /]# docker ps -a
CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
[root@hmm-docker /]# docker volume ls
DRIVER    VOLUME NAME
[root@hmm-docker /]# cd /root/
[root@hmm-docker ~]# ls
anaconda-ks.cfg  docker-hello  source       yun3-centos
centos           --mount       yun1-centos

[root@hmm-docker ~]# docker create -v /dbdata --name dbstore busybox /bin/sh
c8ed1671f0a24ed4f57523790e5ebacc21de7ad082fd6fa77d95e4324d7a54ac
[root@hmm-docker ~]# docker ps -a
CONTAINER ID   IMAGE     COMMAND     CREATED          STATUS    PORTS     NAMES
c8ed1671f0a2   busybox   "/bin/sh"   10 seconds ago   Created             dbstore
[root@hmm-docker ~]# docker volume ls
DRIVER    VOLUME NAME
local     771c50903169f3bb73d5cfe6c7403175336d166250bdeb2f161bbbbf557edc1f
[root@hmm-docker ~]# docker inspect dbstore --format "{{json .Mounts}}"
[{"Type":"volume","Name":"771c50903169f3bb73d5cfe6c7403175336d166250bdeb2f161bbbbf557edc1f","Source":"/var/lib/docker/volumes/771c50903169f3bb73d5cfe6c7403175336d166250bdeb2f161bbbbf557edc1f/_data","Destination":"/dbdata","Driver":"local","Mode":"","RW":true,"Propagation":""}]
[root@hmm-docker ~]# docker run --volumes-form dbstore -v $(pwd):/backup ubunutu ^C
[root@hmm-docker ~]# cd /var/lib/docker/volumes/771c50903169f3bb73d5cfe6c7403175336d166250bdeb2f161bbbbf557edc1f/_data
[root@hmm-docker _data]# touch yun3.txt
[root@hmm-docker _data]# touch aaa.txt
[root@hmm-docker _data]# ls
aaa.txt  yun3.txt
[root@hmm-docker _data]# cd 
[root@hmm-docker ~]# pwd
/root
[root@hmm-docker ~]# docker run --volumes-from dbstore -v $(pwd):/backup ubuntu tar cvfP /backup/backup.tar /dbdata
/dbdata/
/dbdata/yun3.txt
/dbdata/aaa.txt
[root@hmm-docker ~]# ls
anaconda-ks.cfg  centos        --mount  yun1-centos
backup.tar       docker-hello  source   yun3-centos
[root@hmm-docker ~]# du -sh back*
12K	backup.tar
[root@hmm-docker ~]# 

[root@hmm-docker ~]# docker run -v /dbdata --name dbstroe2 ubuntu
[root@hmm-docker ~]# docker volume ls
DRIVER    VOLUME NAME
local     771c50903169f3bb73d5cfe6c7403175336d166250bdeb2f161bbbbf557edc1f
local     e4c9d1edede9cb39d9f81385e27dd4b167450d358e32b3928aee3b71a1a5b011
[root@hmm-docker ~]# docker ps -a
CONTAINER ID   IMAGE     COMMAND                  CREATED              STATUS                          PORTS     NAMES
1704df7c7fa9   ubuntu    "/bin/bash"              18 seconds ago       Exited (0) 18 seconds ago                 dbstroe2
87eb83d613f0   ubuntu    "tar cvfP /backup/ba…"   About a minute ago   Exited (0) About a minute ago             dazzling_kirch
c8ed1671f0a2   busybox   "/bin/sh"                5 minutes ago        Created                                   dbstore
[root@hmm-docker ~]# docker run --volumes-form dbstore2 -v $(pwd):/backup ubuntu bash -c "cd /dbdata && tar xvf backup.tar --strip 1"
unknown flag: --volumes-form
See 'docker run --help'.
[root@hmm-docker ~]# docker run --volumes-form dbstore2 -v $(pwd):/backup ubuntu bash -c "cd /dbdata && tar xvf /backup/backup.tar --strip 1"
unknown flag: --volumes-form
See 'docker run --help'.
[root@hmm-docker ~]# docker run --volumes-from dbstore2 -v $(pwd):/backup ubuntu bash -c "cd /dbdata && tar xvf /backup/backup.tar --strip 1"
docker: Error response from daemon: No such container: dbstore2.
See 'docker run --help'.
[root@hmm-docker ~]# docker run --volumes-from dbstroe2 -v $(pwd):/backup ubuntu bash -c "cd /dbdata && tar xvf /backup/backup.tar --strip 1"
tar: Removing leading `/' from member names
/dbdata/yun3.txt
/dbdata/aaa.txt
[root@hmm-docker ~]#

tmpfs

posted @ 2024-04-23 17:12  代码你敲我不敲  阅读(15)  评论(0)  编辑  收藏  举报
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