码头工人信息
描述
显示系统范围的信息
用法
$ docker info [OPTIONS]
扩展说明
该命令显示有关Docker安装的系统范围信息。显示的信息包括内核版本，容器数量和映像。显示的图像数量是唯一图像的数量。用不同名称标记的同一图像仅计数一次。
如果指定了格式，则将执行给定的模板，而不是默认格式。Go的文本/模板包描述了格式的所有细节。
根据所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，所使用的元数据空间和总元数据空间。
数据文件是存储图像的位置，元数据文件是与这些图像有关的元数据的存储位置。首次运行时，Docker从/var/lib/docker安装的卷上的可用空间中分配一定数量的数据空间和元数据空间。
有关此命令的示例用法，请参阅下面的示例部分。
选项
| 名称，简写 | 默认 | 描述 |
--format ， -f |
使用给定的Go模板格式化输出 |
例子
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。从输出中可以看到，显示了有关devicemapper存储驱动程序的其他信息：
$ docker info
Client:
Context: default
Debug Mode: false
Server:
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: false
Username: gordontheturtle
Registry: https://index.docker.io/v1/
Insecure registries:
myinsecurehost:5000
127.0.0.0/8
显示调试输出
这是在Ubuntu上运行的守护程序的示例输出，该命令使用overlay2存储驱动程序和作为2节点群集的一部分的节点：
$ docker -D info
Client:
Context: default
Debug Mode: true
Server:
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: 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选项使所有docker命令输出调试信息。
格式化输出
您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, ...}
docker info在Windows上运行
以下是在Windows Server 2016上运行的守护程序的示例输出：
E:\docker>docker info
Client:
Context: default
Debug Mode: false
Server:
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: 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
上级命令
| 命令 | 描述 |
|---|---|
| 码头工人 | Docker CLI的基本命令。 |
有关内核支持的警告
如果您的操作系统未启用某些功能，则在运行时，您可能会看到诸如以下之一的警告docker info：
WARNING: Your kernel does not support swap limit capabilities. Limitation discarded.
WARNING: No swap limit support