docker system prune

說明移除未使用的資料
用法docker system prune [選項]

說明

移除所有未使用的容器、網路、映像檔(包括懸空和未使用的),以及選擇性地移除磁碟區。

選項

選項預設值說明
-a, --all移除所有未使用的映像檔,而不僅僅是懸空的映像檔
--filterAPI 1.28+ 提供篩選值(例如 label=<key>=<value>
-f, --force不提示確認
--volumes修剪匿名磁碟區

範例

$ docker system prune

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

Deleted Containers:
f44f9b81948b3919590d5f79a680d8378f1139b41952e219830a33027c80c867
792776e68ac9d75bce4092bc1b5cc17b779bc926ab04f4185aec9bf1c0d4641f

Deleted Networks:
network1
network2

Deleted Images:
untagged: hello-world@sha256:f3b3b28a45160805bb16542c9531888519430e9e6d6ffc09d72261b0d26ff74f
deleted: sha256:1815c82652c03bfd8644afda26fb184f2ed891d921b20a0703b46768f9755c57
deleted: sha256:45761469c965421a92a69cc50e92c01e0cfa94fe026cdd1233445ea00e96289a

Total reclaimed space: 1.84kB

預設情況下,不會移除磁碟區,以防止在目前沒有容器使用磁碟區的情況下刪除重要資料。執行命令時使用 --volumes 旗標也可以修剪匿名磁碟區

$ docker system prune -a --volumes

WARNING! This will remove:
        - all stopped containers
        - all networks not used by at least one container
        - all anonymous 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

Deleted Containers:
0998aa37185a1a7036b0e12cf1ac1b6442dcfa30a5c9650a42ed5010046f195b
73958bfb884fa81fa4cc6baf61055667e940ea2357b4036acbbe25a60f442a4d

Deleted Networks:
my-network-a
my-network-b

Deleted Volumes:
named-vol

Deleted Images:
untagged: my-curl:latest
deleted: sha256:7d88582121f2a29031d92017754d62a0d1a215c97e8f0106c586546e7404447d
deleted: sha256:dd14a93d83593d4024152f85d7c63f76aaa4e73e228377ba1d130ef5149f4d8b
untagged: alpine:3.3
deleted: sha256:695f3d04125db3266d4ab7bbb3c6b23aa4293923e762aa2562c54f49a28f009f
untagged: alpine:latest
deleted: sha256:ee4603260daafe1a8c2f3b78fd760922918ab2441cbb2853ed5c439e59c52f96
deleted: sha256:9007f5987db353ec398a223bc5a135c5a9601798ba20a1abba537ea2f8ac765f
deleted: sha256:71fa90c8f04769c9721459d5aa0936db640b92c8c91c9b589b54abd412d120ab
deleted: sha256:bb1c3357b3c30ece26e6604aea7d2ec0ace4166ff34c3616701279c22444c0f3
untagged: my-jq:latest
deleted: sha256:6e66d724542af9bc4c4abf4a909791d7260b6d0110d8e220708b09e4ee1322e1
deleted: sha256:07b3fa89d4b17009eb3988dfc592c7d30ab3ba52d2007832dffcf6d40e3eda7f
deleted: sha256:3a88a5c81eb5c283e72db2dbc6d65cbfd8e80b6c89bb6e714cfaaa0eed99c548

Total reclaimed space: 13.5 MB

篩選 (--filter)

篩選旗標 (--filter) 的格式為「key=value」。如果有多個篩選器,則傳遞多個旗標(例如,--filter "foo=bar" --filter "bif=baz"

目前支援的篩選器為

  • until (<timestamp>) - 僅移除在指定時間戳記之前建立的容器、映像檔和網路
  • label (label=<key>, label=<key>=<value>, label!=<key>label!=<key>=<value>) - 僅移除具有(或不具有,如果使用 label!=...)指定標籤的容器、映像檔、網路和磁碟區。

until 篩選器可以是 Unix 時間戳記、日期格式的時間戳記或 Go 持續時間字串(例如 10m1h30m),相對於守護程式機器時間計算。日期格式時間戳記的支援格式包括 RFC3339Nano、RFC3339、2006-01-02T15:04:052006-01-02T15:04:05.9999999992006-01-02T07:002006-01-02。如果您未在時間戳記結尾提供 Z+-00:00 時區偏移量,則將使用守護程式上的本地時區。提供 Unix 時間戳記時,請輸入秒[.奈秒],其中秒數是自 1970 年 1 月 1 日(UTC/GMT 午夜)以來經過的秒數,不計算閏秒(又稱 Unix 紀元或 Unix 時間),可選的 .nanoseconds 欄位是 不超過九位數的秒數小數。

label 篩選器接受兩種格式。一種是 label=... (label=<key>label=<key>=<value>),它會移除具有指定標籤的容器、映像檔、網路和磁碟區。另一種格式是 label!=... (label!=<key>label!=<key>=<value>),它會移除沒有指定標籤的容器、映像檔、網路和磁碟區。