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本文檔使用 php中文網(wǎng)手冊(cè) 發(fā)布
文字
描述
復(fù)制容器和本地文件系統(tǒng)之間的文件/文件夾
用法
docker cp [OPTIONS] CONTAINER:SRC_PATH DEST_PATH|-docker cp [OPTIONS] SRC_PATH|- CONTAINER:DEST_PATH
選項(xiàng)
Name, shorthand | Default | Description |
|---|---|---|
--archive, -a | false | Archive mode (copy all uid/gid information) |
--follow-link, -L | false | Always follow symbol link in SRC_PATH |
父命令
命令 | 描述 |
|---|---|
docker | Docker CLI的基本命令。 |
擴(kuò)展描述
docker cp實(shí)用程序?qū)?nèi)容復(fù)制SRC_PATH到DEST_PATH。您可以從容器的文件系統(tǒng)復(fù)制到本地機(jī)器或從本地文件系統(tǒng)復(fù)制到容器。如果-為SRC_PATHor 指定DEST_PATH，您也可以從一個(gè)STDIN或多個(gè)流向tar存檔STDOUT。該CONTAINER可以是運(yùn)行或停止容器。該SRC_PATH或DEST_PATH可以是文件或目錄。
該docker cp命令假定容器路徑與容器的/（根）目錄相關(guān)。這意味著提供初始正斜杠是可選的; 該命令看起來compassionate_darwin:/tmp/foo/myfile.txt和compassionate_darwin:tmp/foo/myfile.txt完全相同。本地機(jī)器路徑可以是絕對(duì)值或相對(duì)值。該命令將本地機(jī)器的相對(duì)路徑解釋為相對(duì)于當(dāng)前運(yùn)行的工作目錄docker cp。
該cp命令的行為與 Unix cp -a命令類似，即在可能的情況下保留權(quán)限時(shí)遞歸復(fù)制目錄。所有權(quán)設(shè)置為目標(biāo)用戶和主要組。例如，復(fù)制到容器的文件是由UID:GIDroot用戶創(chuàng)建的。復(fù)制到本地機(jī)器的文件是由UID:GID調(diào)用該docker cp命令的用戶創(chuàng)建的。但是，如果指定了該-a選項(xiàng)，docker cp則將所有權(quán)設(shè)置為源用戶和主組。如果您指定了該-L選項(xiàng)，請(qǐng)docker cp遵循中的任何符號(hào)鏈接SRC_PATH。docker cp并沒有創(chuàng)建父目錄DEST_PATH，如果它們不存在。
假設(shè)一個(gè)路徑分隔符為/，第一個(gè)參數(shù)SRC_PATH和第二個(gè)參數(shù)DEST_PATH的行為如下所示：
SRC_PATH指定一個(gè)文件該文件被保存到創(chuàng)建的文件中
DEST_PATHDEST_PATH不存在
- `DEST_PATH` does not exist and ends with `/` - Error condition: the destination directory must exist.
- `DEST_PATH` exists and is a file - the destination is overwritten with the source file’s contents
- `DEST_PATH` exists and is a directory - the file is copied into this directory using the basename from `SRC_PATH`
SRC_PATH指定一個(gè)目錄DEST_PATH被創(chuàng)建為一個(gè)目錄，源目錄的內(nèi)容被復(fù)制到這個(gè)目錄中DEST_PATH不存在
- `DEST_PATH` exists and is a file - Error condition: cannot copy a directory to a file
- `DEST_PATH` exists and is a directory - `SRC_PATH` does not end with `/.` (that is: _slash_ followed by _dot_) - the source directory is copied into this directory
- `SRC_PATH` does end with `/.` (that is: _slash_ followed by _dot_) - the _content_ of the source directory is copied into this directory
命令需要SRC_PATH和DEST_PATH按照上述規(guī)則存在。如果SRC_PATH是本地的并且是符號(hào)鏈接，則默認(rèn)情況下復(fù)制符號(hào)鏈接而不是目標(biāo)。要復(fù)制鏈接目標(biāo)而不是鏈接，請(qǐng)指定該-L選項(xiàng)。
冒號(hào)（:）用作CONTAINER它和路徑之間的分隔符。例如，您也可以:在指定路徑到本地機(jī)器SRC_PATH或DEST_PATH本地機(jī)器時(shí)使用file:name.txt。如果在本地機(jī)器路徑中使用: ，則必須使用相對(duì)路徑或絕對(duì)路徑進(jìn)行顯式指定，例如：
`/path/to/file:name.txt` or `./file:name.txt`
這是不可能復(fù)制某些系統(tǒng)文件，如在資源/proc，/sys，/dev在容器中的用戶創(chuàng)建，tmpfs 的，和坐騎。但是，您仍然可以通過手動(dòng)運(yùn)行tar來復(fù)制這些文件docker exec。以下兩個(gè)示例以不同的方式執(zhí)行相同的操作（考慮SRC_PATH并且DEST_PATH是目錄）：
$ docker exec foo tar Ccf $(dirname SRC_PATH) - $(basename SRC_PATH) | tar Cxf DEST_PATH -
$ tar Ccf $(dirname SRC_PATH) - $(basename SRC_PATH) | docker exec -i foo tar Cxf DEST_PATH -
使用-作為SRC_PATH流的內(nèi)容STDIN作為一個(gè) tar 歸檔。該命令將tar的內(nèi)容提取到DEST_PATH容器的文件系統(tǒng)中。在這種情況下，DEST_PATH必須指定一個(gè)目錄。使用-作為DEST_PATH流的資源作為一個(gè)tar歸檔的內(nèi)容STDOUT。