当使用来自注册中心的docker映像时，我经常需要查看映像容器创建的卷。
注意:我在Red Hat 7上使用docker 1.3.2版本。
例子
Docker Registry的postgress官方镜像有一个为容器/var/lib/postgresql/data.配置的卷
在postgres容器中显示/var/lib/postgresql/data的卷最简洁的命令是什么?
当前回答
下面是一行命令来获取正在运行的容器的卷信息:
for contId in `docker ps -q`; do echo "Container Name: " `docker ps -f "id=$contId" | awk '{print $NF}' | grep -v NAMES`; echo "Container Volume: " `docker inspect -f '{{.Config.Volumes}}' $contId`; docker inspect -f '{{ json .Mounts }}' $contId | jq '.[]'; printf "\n"; done
输出是:
root@ubuntu:/var/lib# for contId in `docker ps -q`; do echo "Container Name: " `docker ps -f "id=$contId" | awk '{print $NF}' | grep -v NAMES`; echo "Container Volume: " `docker inspect -f '{{.Config.Volumes}}' $contId`; docker inspect -f '{{ json .Mounts }}' $contId | jq '.[]'; printf "\n"; done
Container Name: freeradius
Container Volume: map[]
Container Name: postgresql
Container Volume: map[/run/postgresql:{} /var/lib/postgresql:{}]
{
"Propagation": "",
"RW": true,
"Mode": "",
"Driver": "local",
"Destination": "/run/postgresql",
"Source": "/var/lib/docker/volumes/83653a53315c693f0f31629f4680c56dfbf861c7ca7c5119e695f6f80ec29567/_data",
"Name": "83653a53315c693f0f31629f4680c56dfbf861c7ca7c5119e695f6f80ec29567"
}
{
"Propagation": "rprivate",
"RW": true,
"Mode": "",
"Destination": "/var/lib/postgresql",
"Source": "/srv/docker/postgresql"
}
Container Name: rabbitmq
Container Volume: map[]
码头工人版本:
root@ubuntu:~# docker version
Client:
Version: 1.12.3
API version: 1.24
Go version: go1.6.3
Git commit: 6b644ec
Built: Wed Oct 26 21:44:32 2016
OS/Arch: linux/amd64
Server:
Version: 1.12.3
API version: 1.24
Go version: go1.6.3
Git commit: 6b644ec
Built: Wed Oct 26 21:44:32 2016
OS/Arch: linux/amd64
其他回答
使用docker ps获取容器id。
然后docker inspect -f '{{.Mounts}}' containerid
例子:
终端1
$ docker run -it -v /tmp:/tmp ubuntu:14.04 /bin/bash
终端2
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ddb7b55902cc ubuntu:14.04 "/bin/bash" About a minute ago Up About a minute distracted_banach
$ docker inspect -f "{{ .Mounts }}" ddb7
map[/tmp:/tmp]
输出
map[/tmp:/tmp]
显然是由于使用了Go语言来实现docker命令工具。
没有-f格式的docker inspect命令相当冗长。因为它是JSON，你可以将它管道到python或nodejs，并提取你需要的任何东西。
paul@home:~$ docker inspect ddb7
[{
"AppArmorProfile": "",
"Args": [],
"Config": {
"AttachStderr": true,
"AttachStdin": true,
"AttachStdout": true,
"Cmd": [
"/bin/bash"
],
"CpuShares": 0,
"Cpuset": "",
"Domainname": "",
"Entrypoint": null,
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"ExposedPorts": null,
"Hostname": "ddb7b55902cc",
"Image": "ubuntu:14.04",
"MacAddress": "",
"Memory": 0,
"MemorySwap": 0,
"NetworkDisabled": false,
"OnBuild": null,
"OpenStdin": true,
"PortSpecs": null,
"StdinOnce": true,
"Tty": true,
"User": "",
"Volumes": null,
"WorkingDir": ""
},
"Created": "2015-05-08T22:41:44.74862921Z",
"Driver": "devicemapper",
"ExecDriver": "native-0.2",
"ExecIDs": null,
"HostConfig": {
"Binds": [
"/tmp:/tmp"
],
"CapAdd": null,
"CapDrop": null,
"ContainerIDFile": "",
"Devices": [],
"Dns": null,
"DnsSearch": null,
"ExtraHosts": null,
"IpcMode": "",
"Links": null,
"LxcConf": [],
"NetworkMode": "bridge",
"PidMode": "",
"PortBindings": {},
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"RestartPolicy": {
"MaximumRetryCount": 0,
"Name": ""
},
"SecurityOpt": null,
"VolumesFrom": null
},
"HostnamePath": "/var/lib/docker/containers/ddb7b55902cc328612d794570fe9a936d96a9644411e89c4ea116a5fef4c311a/hostname",
"HostsPath": "/var/lib/docker/containers/ddb7b55902cc328612d794570fe9a936d96a9644411e89c4ea116a5fef4c311a/hosts",
"Id": "ddb7b55902cc328612d794570fe9a936d96a9644411e89c4ea116a5fef4c311a",
"Image": "ed5a78b7b42bde1e3e4c2996e02da778882dca78f8919cbd0deb6694803edec3",
"MountLabel": "",
"Name": "/distracted_banach",
"NetworkSettings": {
"Bridge": "docker0",
"Gateway": "172.17.42.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.4",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"LinkLocalIPv6Address": "fe80::42:acff:fe11:4",
"LinkLocalIPv6PrefixLen": 64,
"MacAddress": "02:42:ac:11:00:04",
"PortMapping": null,
"Ports": {}
},
"Path": "/bin/bash",
"ProcessLabel": "",
"ResolvConfPath": "/var/lib/docker/containers/ddb7b55902cc328612d794570fe9a936d96a9644411e89c4ea116a5fef4c311a/resolv.conf",
"RestartCount": 0,
"State": {
"Error": "",
"ExitCode": 0,
"FinishedAt": "0001-01-01T00:00:00Z",
"OOMKilled": false,
"Paused": false,
"Pid": 6115,
"Restarting": false,
"Running": true,
"StartedAt": "2015-05-08T22:41:45.367432585Z"
},
"Volumes": {
"/tmp": "/tmp"
},
"VolumesRW": {
"/tmp": true
}
}
]
Docker history <image name>将显示烘烤到图像中的层。不幸的是，docker的历史似乎因其格式和缺乏选择显示内容的选项而受到限制。
你可以通过——no-trunc标志来选择简洁和冗长的格式。
$ docker history drpaulbrewer/spark-worker
IMAGE CREATED CREATED BY SIZE
438ff4e1753a 2 weeks ago /bin/sh -c #(nop) CMD [/bin/sh -c /spark/my-s 0 B
6b664e299724 2 weeks ago /bin/sh -c #(nop) ADD file:09da603c5f0dca7cc6 296 B
f6ae126ae124 2 weeks ago /bin/sh -c #(nop) MAINTAINER drpaulbrewer@eaf 0 B
70bcb3ffaec9 2 weeks ago /bin/sh -c #(nop) EXPOSE 2222/tcp 4040/tcp 60 0 B
1332ac203849 2 weeks ago /bin/sh -c apt-get update && apt-get --yes up 1.481 GB
8e6f1e0bb1b0 2 weeks ago /bin/sh -c sed -e 's/archive.ubuntu.com/www.g 1.975 kB
b3d242776b1f 2 weeks ago /bin/sh -c #(nop) WORKDIR /spark/spark-1.3.1 0 B
ac0d6cc5aa3f 2 weeks ago /bin/sh -c #(nop) ADD file:b6549e3d28e2d149c0 25.89 MB
6ee404a44b3f 5 weeks ago /bin/sh -c #(nop) WORKDIR /spark 0 B
c167faff18cf 5 weeks ago /bin/sh -c adduser --disabled-password --home 335.1 kB
f55d468318a4 5 weeks ago /bin/sh -c #(nop) MAINTAINER drpaulbrewer@eaf 0 B
19c8c047d0fe 8 weeks ago /bin/sh -c #(nop) CMD [/bin/bash] 0 B
c44d976a473f 8 weeks ago /bin/sh -c sed -i 's/^#\s*\(deb.*universe\)$/ 1.879 kB
14dbf1d35e28 8 weeks ago /bin/sh -c echo '#!/bin/sh' > /usr/sbin/polic 701 B
afa7a164a0d2 8 weeks ago /bin/sh -c #(nop) ADD file:57f97478006b988c0c 131.5 MB
511136ea3c5a 23 months ago 0 B
这里有一个详细的例子。
docker history --no-trunc=true drpaulbrewer/spark-worker
IMAGE CREATED CREATED BY SIZE
438ff4e1753a60779f389a3de593d41f7d24a61da6e1df76dded74a688febd64 2 weeks ago /bin/sh -c #(nop) CMD [/bin/sh -c /spark/my-spark-worker.sh] 0 B
6b664e29972481b8d6d47f98167f110609d9599f48001c3ca11c22364196c98a 2 weeks ago /bin/sh -c #(nop) ADD file:09da603c5f0dca7cc60f1911caf30c3c70df5e4783f7eb10468e70df66e2109f in /spark/ 296 B
f6ae126ae124ca211c04a1257510930b37ea78425e31a273ea0b1495fa176c57 2 weeks ago /bin/sh -c #(nop) MAINTAINER drpaulbrewer@eaftc.com 0 B
70bcb3ffaec97a0d14e93b170ed70cc7d68c3c9dfb0222c1d360a300d6e05255 2 weeks ago /bin/sh -c #(nop) EXPOSE 2222/tcp 4040/tcp 6066/tcp 7077/tcp 7777/tcp 8080/tcp 8081/tcp 0 B
1332ac20384947fe1f15107213b675e5be36a68d72f0e81153d6d5a21acf35af 2 weeks ago /bin/sh -c apt-get update && apt-get --yes upgrade && apt-get --yes install sed nano curl wget openjdk-8-jdk scala && echo "JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64" >>/etc/environment && export MAVEN_OPTS="-Xmx2g -XX:MaxPermSize=512M -XX:ReservedCodeCacheSize=512m" && ./build/mvn -Phive -Phive-thriftserver -DskipTests clean package && chown -R spark:spark /spark && mkdir /var/run/sshd 1.481 GB
8e6f1e0bb1b0b9286947d3a4b443cc8099b00f9670aab1d58654051e06f62e51 2 weeks ago /bin/sh -c sed -e 's/archive.ubuntu.com/www.gtlib.gatech.edu\/pub/' /etc/apt/sources.list > /tmp/sources.list && mv /tmp/sources.list /etc/apt/sources.list 1.975 kB
b3d242776b1f1f1ae5685471d06a91a68f92845ef6fc6445d831835cd55e5d0b 2 weeks ago /bin/sh -c #(nop) WORKDIR /spark/spark-1.3.1 0 B
ac0d6cc5aa3fdc3b65fc0173f6775af283c3c395c8dae945cf23940435f2785d 2 weeks ago /bin/sh -c #(nop) ADD file:b6549e3d28e2d149c0bc84f69eb0beab16f62780fc4889bcc64cfc9ce9f762d6 in /spark/ 25.89 MB
6ee404a44b3fdd3ef3318dc10f3d002f1995eea238c78f4eeb9733d00bb29404 5 weeks ago /bin/sh -c #(nop) WORKDIR /spark 0 B
c167faff18cfecedef30343ef1cb54aca45f4ef0478a3f6296746683f69d601b 5 weeks ago /bin/sh -c adduser --disabled-password --home /spark spark 335.1 kB
f55d468318a4778733160d377c5d350dc8f593683009699c2af85244471b15a3 5 weeks ago /bin/sh -c #(nop) MAINTAINER drpaulbrewer@eaftc.com 0 B
19c8c047d0fe2de7239120f2b5c1a20bbbcb4d3eb9cbf0efa59ab27ab047377a 8 weeks ago /bin/sh -c #(nop) CMD [/bin/bash] 0 B
c44d976a473f143937ef91449c73f2cabd109b540f6edf54facb9bc2b4fff136 8 weeks ago /bin/sh -c sed -i 's/^#\s*\(deb.*universe\)$/\1/g' /etc/apt/sources.list 1.879 kB
14dbf1d35e2849a00c6c2628055030fa84b4fb55eaadbe0ecad8b82df65cc0db 8 weeks ago /bin/sh -c echo '#!/bin/sh' > /usr/sbin/policy-rc.d && echo 'exit 101' >> /usr/sbin/policy-rc.d && chmod +x /usr/sbin/policy-rc.d && dpkg-divert --local --rename --add /sbin/initctl && cp -a /usr/sbin/policy-rc.d /sbin/initctl && sed -i 's/^exit.*/exit 0/' /sbin/initctl && echo 'force-unsafe-io' > /etc/dpkg/dpkg.cfg.d/docker-apt-speedup && echo 'DPkg::Post-Invoke { "rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true"; };' > /etc/apt/apt.conf.d/docker-clean && echo 'APT::Update::Post-Invoke { "rm -f /var/cache/apt/archives/*.deb /var/cache/apt/archives/partial/*.deb /var/cache/apt/*.bin || true"; };' >> /etc/apt/apt.conf.d/docker-clean && echo 'Dir::Cache::pkgcache ""; Dir::Cache::srcpkgcache "";' >> /etc/apt/apt.conf.d/docker-clean && echo 'Acquire::Languages "none";' > /etc/apt/apt.conf.d/docker-no-languages && echo 'Acquire::GzipIndexes "true"; Acquire::CompressionTypes::Order:: "gz";' > /etc/apt/apt.conf.d/docker-gzip-indexes 701 B
afa7a164a0d215dbf45cd1aadad2a4d12b8e33fc890064568cc2ea6d42ef9b3c 8 weeks ago /bin/sh -c #(nop) ADD file:57f97478006b988c0c68e5bf82684372e427fd45f21cd7baf5d974d2cfb29e65 in / 131.5 MB
511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158 23 months ago 0 B
下面是一行命令来获取正在运行的容器的卷信息:
for contId in `docker ps -q`; do echo "Container Name: " `docker ps -f "id=$contId" | awk '{print $NF}' | grep -v NAMES`; echo "Container Volume: " `docker inspect -f '{{.Config.Volumes}}' $contId`; docker inspect -f '{{ json .Mounts }}' $contId | jq '.[]'; printf "\n"; done
输出是:
root@ubuntu:/var/lib# for contId in `docker ps -q`; do echo "Container Name: " `docker ps -f "id=$contId" | awk '{print $NF}' | grep -v NAMES`; echo "Container Volume: " `docker inspect -f '{{.Config.Volumes}}' $contId`; docker inspect -f '{{ json .Mounts }}' $contId | jq '.[]'; printf "\n"; done
Container Name: freeradius
Container Volume: map[]
Container Name: postgresql
Container Volume: map[/run/postgresql:{} /var/lib/postgresql:{}]
{
"Propagation": "",
"RW": true,
"Mode": "",
"Driver": "local",
"Destination": "/run/postgresql",
"Source": "/var/lib/docker/volumes/83653a53315c693f0f31629f4680c56dfbf861c7ca7c5119e695f6f80ec29567/_data",
"Name": "83653a53315c693f0f31629f4680c56dfbf861c7ca7c5119e695f6f80ec29567"
}
{
"Propagation": "rprivate",
"RW": true,
"Mode": "",
"Destination": "/var/lib/postgresql",
"Source": "/srv/docker/postgresql"
}
Container Name: rabbitmq
Container Volume: map[]
码头工人版本:
root@ubuntu:~# docker version
Client:
Version: 1.12.3
API version: 1.24
Go version: go1.6.3
Git commit: 6b644ec
Built: Wed Oct 26 21:44:32 2016
OS/Arch: linux/amd64
Server:
Version: 1.12.3
API version: 1.24
Go version: go1.6.3
Git commit: 6b644ec
Built: Wed Oct 26 21:44:32 2016
OS/Arch: linux/amd64
显示容器使用的卷的名称和挂载点目的地:
docker container inspect \
-f '{{ range .Mounts }}{{ .Name }}:{{ .Destination }} {{ end }}' \
CONTAINER_ID_OR_NAME
这与Docker 1.13兼容。
You can get information about which volumes were specifically baked into the container by inspecting the container and looking in the JSON output and comparing a couple of the fields. When you run docker inspect myContainer, the Volumes and VolumesRW fields give you information about ALL of the volumes mounted inside a container, including volumes mounted in both the Dockerfile with the VOLUME directive, and on the command line with the docker run -v command. However, you can isolate which volumes were mounted in the container using the docker run -v command by checking for the HostConfig.Binds field in the docker inspect JSON output. To clarify, this HostConfig.Binds field tells you which volumes were mounted specifically in your docker run command with the -v option. So if you cross-reference this field with the Volumes field, you will be able to determine which volumes were baked into the container using VOLUME directives in the Dockerfile.
grep可以像这样完成:
$ docker inspect myContainer | grep -C2 Binds
...
"HostConfig": {
"Binds": [
"/var/docker/docker-registry/config:/registry"
],
和…
$ docker inspect myContainer | grep -C3 -e "Volumes\":"
...
"Volumes": {
"/data": "/var/lib/docker...",
"/config": "/var/lib/docker...",
"/registry": "/var/docker/docker-registry/config"
在我的例子中，你可以看到我使用docker run命令中的-v选项将/var/docker/docker-registry/config挂载到容器中作为/registry，并且我使用Dockerfile中的VOLUME指令挂载了/data和/config卷。容器不需要运行来获取这些信息，但它需要至少运行一次才能填充docker inspect命令的HostConfig JSON输出。
使用Type:Source:Destination格式打印挂载:
docker container inspect \
-f '{{range .Mounts}}{{.Type}}:{{.Source}}:{{.Destination}}{{println}}{{ end }}' \
<containerId>
只打印Type="volume"的mount的Source:
docker container inspect \
-f '{{range .Mounts}}{{ if eq .Type "volume" }}{{println .Source }}{{ end }}{{end}}' \
<containerId>
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