Linux入门教程:Docker命令行参考(3) – docker info显示系统范围信息,显示的信息包括内核版
Usage: docker info
Display system-wide information
Options:
--help Print usage
这个命令显示有关docker安装的系统信息。显示的信息包括内核版本,容器和镜像的数量。镜像的数量显示的是无重复的镜像数量。使用不同名称tag同一样镜像算一个镜像。
基于使用的存储驱动,会显示额外的信息,例如存储池名称,数据文件,元数据文件,已用的数据空间,总的数据空间,已用的元数据空间和总的元数据空间。
数据文件是用来存储镜像的,元数据文件则存储关于那些存储镜像的元数据。当首次启动docker时,将在挂载到/var/lib/docker的数据卷分配数据空间和元数据空间。
示例
显示docker系统信息:
下面是运行在ubuntu的daemon输出样本,使用的是overlay存储驱动并且是两个节点集群的其中一个节点:
$ docker -D info
Containers: 14
Running: 3
Paused: 1
Stopped: 10
Images: 52
Server Version: 1.12.0-dev
Storage Driver: overlay
Backing Filesystem: extfs
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge null host overlay
Swarm:
NodeID: 0gac67oclbxq7
Is Manager: true
Managers: 2
Nodes: 2
Runtimes: default
Default Runtime: default
Security Options: apparmor seccomp
Kernel Version: 4.4.0-21-generic
Operating System: Ubuntu 16.04 LTS
OSType: linux
Architecture: x86_64
CPUs: 24
Total Memory: 62.86 GiB
Name: docker
ID: I54V:OLXT:HVMM:TPKO:JPHQ:CQCD:JNLC:O3BZ:4ZVJ:43XJ:PFHZ:6N2S
Docker Root Dir: /var/lib/docker
Debug mode (client): true
Debug mode (server): true
File Descriptors: 59
Goroutines: 159
System Time: 2016-04-26T10:04:06.14689342-04:00
EventsListeners: 0
Http Proxy: http://test:test@localhost:8080
Https Proxy: https://test:test@localhost:8080
No Proxy: localhost,127.0.0.1,docker-registry.somecorporation.com
Username: svendowideit
Registry: https://index.docker.io/v1/
WARNING: No swap limit support
Labels:
storage=ssd
staging=true
Insecure registries:
myinsecurehost:5000
127.0.0.0/8
全局-D选项通知docker命令输出调试信息。
下面的示例显示运行在Red Hat Enterprise Linux系统的daemon的输出信息。使用的是devicemapper存储驱动。
$ docker info
Containers: 14
Running: 3
Paused: 1
Stopped: 10
Untagged 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: xyz
Registry: https://index.docker.io/v1/
Insecure registries:
myinsecurehost:5000
127.0.0.0/8
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