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Docker System Command Manage Docker

轻量级云原生架构实验室

发布于 2018-12-04 08:59:19

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文章被收录于专栏：轻量级微服务轻量级微服务

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Docker System 相关命令说明：

命令	描述
docker system df	显示 docker 磁盘使用情况
docker system events	获取 server 实时实践
docker system info	显示系统范围的信息
docker system prune	删除无用数据

docker system df

这个命令显示 docker daemon 磁盘空间的使用情况。示例：

$ docker system df

TYPE                TOTAL               ACTIVE              SIZE                RECLAIMABLE
Images              3                   1                   456.6MB             361.7MB (79%)
Containers          1                   1                   0B                  0B
Local Volumes       1                   1                   0B                  0B
Build Cache         0                   0                   0B                  0B

查看详情，使用加上 -v 标识：

$ docker system df -v

Images space usage:

REPOSITORY                                      TAG                 IMAGE ID            CREATED ago         SIZE                SHARED SIZE         UNIQUE SiZE         CONTAINERS
redis                                           latest              1babb1dde7e1        10 days ago ago     94.91MB             0B                  94.91MB             1
redis                                           4.0.9               bfcb1f6df2db        6 months ago ago    106.7MB             0B                  106.7MB             0
registry.cn-hangzhou.aliyuncs.com/anoy/ubuntu   latest              e72898b400f8        15 months ago ago   254.9MB             0B                  254.9MB             0

Containers space usage:

CONTAINER ID        IMAGE               COMMAND                  LOCAL VOLUMES       SIZE                CREATED ago              STATUS              NAMES
b67d3fff0ccc        redis               "docker-entrypoint.s…"   1                   0B                  About a minute ago ago   Up About a minute   compassionate_leakey

Local Volumes space usage:

VOLUME NAME                                                        LINKS               SIZE
9efe55b2bef5d96d6584f2fe6a81834368a4a82faf0ba248e1b63e10f3c5a2a3   1                   0B

Build cache usage: 0B

docker system events

这个命令获取 server 端的实时事件，这些事件因 docker 对象类型而异。

对象类型：containers

attach
commit
copy
create
destroy
detach
die
exec_create
exec_detach
exec_start
export
health_status
kill
oom
pause
rename
resize
restart
start
stop
top
unpause
update

对象类型：images

delete
import
load
pull
push
save
tag
untag

对象类型：plugins

install
enable
disable
remove

对象类型：volumes

create
mount
unmount
destroy

对象类型：networks

create
connect
disconnect
destroy

对象类型：daemons

reload

可选参数：

名称, 短名称	描述
--filter , -f	根据条件过滤输出
--since	起始时间戳，只显示该时间后的事件
--until	截止时间戳，只显示该时间前的事件

打开两个终端窗口，示例：

目前支持的过滤条件如下：

container (container=<name or id>)
daemon (daemon=<name or id>)
event (event=<event action>)
image (image=<tag or id>)
label (label=<key> or label=<key>=<value>)
network (network=<name or id>)
plugin (plugin=<name or id>)
type (type=<container or image or volume or network or daemon or plugin>)
volume (volume=<name or id>)

打开两个终端窗口，示例：

docker system info

显示系统范围的信息，与 docker info 输出结果一致

docker system prune

删除所有未使用的容器、网络、镜像以及数据卷。

基本命令，示例 docker system prune：

$ docker system prune

WARNING! This will remove:
        - all stopped containers
        - all networks not used by at least one container
        - all dangling images
        - all build cache
Are you sure you want to continue? [y/N] y
Total reclaimed space: 0B

提示：dangling images 表示 docker images 标签为 <none> 的镜像

基本命令，示例 docker system prune -a：

$ docker system prune -a

WARNING! This will remove:
        - all stopped containers
        - all networks not used by at least one container
        - all images without at least one container associated to them
        - all build cache
Are you sure you want to continue? [y/N] y

提示：-a 会额外删除没有容器使用的镜像

删除数据卷，示例 docker system prune -a --volumes：

$ docker system prune -a --volumes
WARNING! This will remove:
        - all stopped containers
        - all networks not used by at least one container
        - all volumes not used by at least one container
        - all images without at least one container associated to them
        - all build cache
Are you sure you want to continue? [y/N] y