Docker命令
阿新 • • 發佈：2020-11-19
幫助命令
docker version
顯示Docker版本資訊
[root@localhost ~]# docker version Client: Docker Engine - Community Version: 19.03.13 API version: 1.40 Go version: go1.13.15 Git commit: 4484c46d9d Built: Wed Sep 16 17:03:45 2020 OS/Arch: linux/amd64 Experimental: false Server: Docker Engine - Community Engine: Version: 19.03.13 API version: 1.40 (minimum version 1.12) Go version: go1.13.15 Git commit: 4484c46d9d Built: Wed Sep 16 17:02:21 2020 OS/Arch: linux/amd64 Experimental: false containerd: Version: 1.3.7 GitCommit: 8fba4e9a7d01810a393d5d25a3621dc101981175 runc: Version: 1.0.0-rc10 GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd docker-init: Version: 0.18.0 GitCommit: fec3683 [root@localhost ~]#
docker info
顯示docker的系統資訊，包括映象和容器的數量。
[root@localhost ~]# docker info Client: Debug Mode: false Server: Containers: 1 Running: 0 Paused: 0 Stopped: 1 Images: 1 Server Version: 19.03.13 Storage Driver: overlay2 Backing Filesystem: xfs Supports d_type: true Native Overlay Diff: true Logging Driver: json-file Cgroup Driver: cgroupfs Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog Swarm: inactive Runtimes: runc Default Runtime: runc Init Binary: docker-init containerd version: 8fba4e9a7d01810a393d5d25a3621dc101981175 runc version: dc9208a3303feef5b3839f4323d9beb36df0a9dd init version: fec3683 Security Options: seccomp Profile: default Kernel Version: 3.10.0-1127.19.1.el7.x86_64 Operating System: CentOS Linux 7 (Core) OSType: linux Architecture: x86_64 CPUs: 1 Total Memory: 1.777GiB Name: localhost.localdomain ID: 4ARA:NX4Y:7DM7:IGVR:XQNU:PNSQ:SDFN:44U2:VINY:2OMR:VDKO:2SKU Docker Root Dir: /var/lib/docker Debug Mode: false Registry: https://index.docker.io/v1/ Labels: Experimental: false Insecure Registries: 127.0.0.0/8 Registry Mirrors: https://gnxq79wc.mirror.aliyuncs.com/ Live Restore Enabled: false [root@localhost ~]#
docker 命令 --help
幫助命令
命令：https://docs.docker.com/engine/reference/commandline/
映象命令
docker images
檢視所有本地主機上的映象
[root@localhost ~]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE hello-world latest bf756fb1ae65 10 months ago 13.3kB #解釋 REPOSITORY 映象倉庫源 TAG 映象的標籤 IMAGE ID 映象的ID CREATED 映象的建立時間 SIZE 映象的大小
Options選項
[root@localhost ~]# docker images --help
Usage: docker images [OPTIONS] [REPOSITORY[:TAG]]
List images
Options:
-a, --all Show all images (default hides intermediate images)
--digests Show digests #格式化
-f, --filter filter Filter output based on conditions provided #過濾
--format string Pretty-print images using a Go template
--no-trunc Don't truncate output
-q, --quiet Only show numeric IDs
解釋
-a 列出所有映象
-q 只顯示映象的ID
[root@localhost ~]# docker images -a
REPOSITORY TAG IMAGE ID CREATED SIZE
hello-world latest bf756fb1ae65 10 months ago 13.3kB
[root@localhost ~]# docker images -aq
bf756fb1ae65
[root@localhost ~]#
搜尋命令
網頁搜尋
docker search
docker search --help
[root@localhost ~]# docker search --help
Usage: docker search [OPTIONS] TERM
Search the Docker Hub for images
Options:
-f, --filter filter Filter output based on conditions provided
--format string Pretty-print search using a Go template
--limit int Max number of search results (default 25)
--no-trunc Don't truncate output
[root@localhost ~]#
例如：
--filter=STARS=3000 #過濾出映象收藏大於3000的
[root@localhost ~]# docker search mysql --filter=STARS=3000
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
mysql MySQL is a widely used, open-source relation… 10115 [OK]
mariadb MariaDB is a community-developed fork of MyS… 3715 [OK]
[root@localhost ~]#
下載命令
docker pull
[root@localhost ~]# docker pull --help
Usage: docker pull [OPTIONS] NAME[:TAG|@DIGEST]
Pull an image or a repository from a registry
Options:
-a, --all-tags Download all tagged images in the repository
--disable-content-trust Skip image verification (default true)
--platform string Set platform if server is multi-platform capable
-q, --quiet Suppress verbose output
[root@localhost ~]#
[root@localhost ~]# docker pull mysql
Using default tag: latest #如果不寫tag:，預設下載最新的版本
latest: Pulling from library/mysql
bb79b6b2107f: Pull complete #分層下載，docker image的核心：聯合檔案系統
49e22f6fb9f7: Pull complete
842b1255668c: Pull complete
9f48d1f43000: Pull complete
c693f0615bce: Pull complete
8a621b9dbed2: Pull complete
0807d32aef13: Pull complete
a56aca0feb17: Pull complete
de9d45fd0f07: Pull complete
1d68a49161cc: Pull complete
d16d318b774e: Pull complete
49e112c55976: Pull complete
Digest: sha256:8c17271df53ee3b843d6e16d46cff13f22c9c04d6982eb15a9a47bd5c9ac7e2d #簽名
Status: Downloaded newer image for mysql:latest
docker.io/library/mysql:latest #真實地址
[root@localhost ~]
docker pull mysql=docker pull docker.io/library/mysql:latest #等價
指定下載版本
docker pull 映象名:tag
注：指定下載的版本必須是存在的。
聯合檔案系統，公用檔案不在下載極大減少佔用儲存
比較：
[root@localhost ~]# docker pull mysql
Using default tag: latest
latest: Pulling from library/mysql
bb79b6b2107f: Pull complete
49e22f6fb9f7: Pull complete
842b1255668c: Pull complete
9f48d1f43000: Pull complete
c693f0615bce: Pull complete
8a621b9dbed2: Pull complete
0807d32aef13: Pull complete
a56aca0feb17: Pull complete
de9d45fd0f07: Pull complete
1d68a49161cc: Pull complete
d16d318b774e: Pull complete
49e112c55976: Pull complete
Digest: sha256:8c17271df53ee3b843d6e16d46cff13f22c9c04d6982eb15a9a47bd5c9ac7e2d
Status: Downloaded newer image for mysql:latest
docker.io/library/mysql:latest
[root@localhost ~]# docker pull mysql:5.7
5.7: Pulling from library/mysql
bb79b6b2107f: Already exists
49e22f6fb9f7: Already exists
842b1255668c: Already exists
9f48d1f43000: Already exists
c693f0615bce: Already exists
8a621b9dbed2: Already exists
0807d32aef13: Already exists
f15d42f48bd9: Pull complete
098ceecc0c8d: Pull complete
b6fead9737bc: Pull complete
351d223d3d76: Pull complete
Digest: sha256:4d2b34e99c14edb99cdd95ddad4d9aa7ea3f2c4405ff0c3509a29dc40bcb10ef
Status: Downloaded newer image for mysql:5.7
docker.io/library/mysql:5.7
[root@localhost ~]#
檢視下載的映象
刪除映象命令
docker rmi -f id
docker rmi -f id1 id2 id3 #刪除多個指定的容器映象
通過ID刪除映象/通過TAG刪除映象
再次檢視，mysql 5.7已被刪除，只刪除了部分層。