docker info

描述

显示系统范围内的信息

用法

docker info [OPTIONS]

选项

名字，简写	默认	描述
--format, -f		使用给定的Go模板格式化输出

父命令

命令	描述
docker	Docker CLI的基本命令。

扩展描述

此命令显示有关 Docker 安装的系统范围信息。显示的信息包括内核版本，容器数量和图像。显示的图像数量是唯一图像的数量。用不同名称标记的相同图像只计算一次。

如果指定了格式，则将执行给定模板而不是默认格式。Go 的文本/模板包描述了格式的所有细节。

根据使用的存储驱动程序，可以显示其他信息，例如池名称，数据文件，元数据文件，使用的数据空间，总数据空间，使用的元数据空间以及总元数据空间。

数据文件是存储图像的位置，元数据文件是存储关于这些图像的元数据的位置。当第一次运行时，Docker 会从/var/lib/docker挂载的卷上可用的空间中分配一定数量的数据空间和元数据空间。

实例

显示输出

以下示例显示了使用devicemapper存储驱动程序在 Red Hat Enterprise Linux 上运行的守护程序的输出。从输出中可以看出，显示了有关devicemapper存储驱动程序的附加信息：

$ docker info

Containers: 14
 Running: 3
 Paused: 1
 Stopped: 10
Images: 52
Server Version: 1.10.3
Storage Driver: devicemapper
 Pool Name: docker-202:2-25583803-pool
 Pool Blocksize: 65.54 kB
 Base Device Size: 10.74 GB
 Backing Filesystem: xfs
 Data file: /dev/loop0
 Metadata file: /dev/loop1
 Data Space Used: 1.68 GB
 Data Space Total: 107.4 GB
 Data Space Available: 7.548 GB
 Metadata Space Used: 2.322 MB
 Metadata Space Total: 2.147 GB
 Metadata Space Available: 2.145 GB
 Udev Sync Supported: true
 Deferred Removal Enabled: false
 Deferred Deletion Enabled: false
 Deferred Deleted Device Count: 0
 Data loop file: /var/lib/docker/devicemapper/devicemapper/data
 Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
 Library Version: 1.02.107-RHEL7 (2015-12-01)
Execution Driver: native-0.2
Logging Driver: json-file
Plugins:
 Volume: local
 Network: null host bridge
Kernel Version: 3.10.0-327.el7.x86_64
Operating System: Red Hat Enterprise Linux Server 7.2 (Maipo)
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 991.7 MiB
Name: ip-172-30-0-91.ec2.internal
ID: I54V:OLXT:HVMM:TPKO:JPHQ:CQCD:JNLC:O3BZ:4ZVJ:43XJ:PFHZ:6N2S
Docker Root Dir: /var/lib/docker
Debug mode (client): false
Debug mode (server): false
Username: gordontheturtle
Registry: https://index.docker.io/v1/
Insecure registries:
 myinsecurehost:5000
 127.0.0.0/8

显示调试输出

以下是在 Ubuntu 上运行的守护进程的示例输出，使用 overlay2 存储驱动程序和属于双节点群集的节点：

$ docker -D info

Containers: 14
 Running: 3
 Paused: 1
 Stopped: 10
Images: 52
Server Version: 1.13.0
Storage Driver: overlay2
 Backing Filesystem: extfs
 Supports d_type: true
 Native Overlay Diff: false
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: bridge host macvlan null overlay
Swarm: active
 NodeID: rdjq45w1op418waxlairloqbm
 Is Manager: true
 ClusterID: te8kdyw33n36fqiz74bfjeixd
 Managers: 1
 Nodes: 2
 Orchestration:
  Task History Retention Limit: 5
 Raft:
  Snapshot Interval: 10000
  Number of Old Snapshots to Retain: 0
  Heartbeat Tick: 1
  Election Tick: 3
 Dispatcher:
  Heartbeat Period: 5 seconds
 CA Configuration:
  Expiry Duration: 3 months
 Root Rotation In Progress: false
 Node Address: 172.16.66.128 172.16.66.129
 Manager Addresses:
  172.16.66.128:2477
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 8517738ba4b82aff5662c97ca4627e7e4d03b531
runc version: ac031b5bf1cc92239461125f4c1ffb760522bbf2
init version: N/A (expected: v0.13.0)
Security Options:
 apparmor
 seccomp
  Profile: default
Kernel Version: 4.4.0-31-generic
Operating System: Ubuntu 16.04.1 LTS
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 1.937 GiB
Name: ubuntu
ID: H52R:7ZR6:EIIA:76JG:ORIY:BVKF:GSFU:HNPG:B5MK:APSC:SZ3Q:N326
Docker Root Dir: /var/lib/docker
Debug Mode (client): true
Debug Mode (server): true
 File Descriptors: 30
 Goroutines: 123
 System Time: 2016-11-12T17:24:37.955404361-08:00
 EventsListeners: 0
Http Proxy: http://test:test@proxy.example.com:8080
Https Proxy: https://test:test@proxy.example.com:8080
No Proxy: localhost,127.0.0.1,docker-registry.somecorporation.com
Registry: https://index.docker.io/v1/
WARNING: No swap limit support
Labels:
 storage=ssd
 staging=true
Experimental: false
Insecure Registries:
 127.0.0.0/8
Registry Mirrors:
  http://192.168.1.2/
  http://registry-mirror.example.com:5000/
Live Restore Enabled: false

全局-D选项会导致所有docker命令输出调试信息。

格式化输出

还可以指定输出格式：

$ docker info --format '{{json .}}'

{"ID":"I54V:OLXT:HVMM:TPKO:JPHQ:CQCD:JNLC:O3BZ:4ZVJ:43XJ:PFHZ:6N2S","Containers":14, ...}

在Windows上运行docker info

以下是在 Windows Server 2016 上运行的守护程序的示例输出：

E:\docker>docker info

Containers: 1
 Running: 0
 Paused: 0
 Stopped: 1
Images: 17
Server Version: 1.13.0
Storage Driver: windowsfilter
 Windows:
Logging Driver: json-file
Plugins:
 Volume: local
 Network: nat null overlay
Swarm: inactive
Default Isolation: process
Kernel Version: 10.0 14393 (14393.206.amd64fre.rs1_release.160912-1937)
Operating System: Windows Server 2016 Datacenter
OSType: windows
Architecture: x86_64
CPUs: 8
Total Memory: 3.999 GiB
Name: WIN-V0V70C0LU5P
ID: NYMS:B5VK:UMSL:FVDZ:EWB5:FKVK:LPFL:FJMQ:H6FT:BZJ6:L2TD:XH62
Docker Root Dir: C:\control
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Insecure Registries:
 127.0.0.0/8
Registry Mirrors:
  http://192.168.1.2/
  http://registry-mirror.example.com:5000/
Live Restore Enabled: false