如何在docker cp上复制目录?

引用 docs

cp 命令的行为类似于Unix cp -a 命令,在可能的情况下,以递归方式复制目录并保留权限。

-- https://docs.docker.com/engine/reference/commandline/#extended-description

docker cp 没有也不需要 -r 旗帜。省略它就行了。这样地:

# Create a directory and put two files in it
$ mkdir testdir && touch testdir/aaa testdir/bbb

# Make sure files are there
$ ls -la testdir
total 384
drwxr-xr-x 1 jannisbaratheon 197121 0 paź 10 15:15 ./
drwxr-xr-x 1 jannisbaratheon 197121 0 paź 10 15:15 ../
-rw-r--r-- 1 jannisbaratheon 197121 0 paź 10 15:15 aaa
-rw-r--r-- 1 jannisbaratheon 197121 0 paź 10 15:15 bbb

# Create container and fetch its ID
$ export CONTAINER_ID=`docker run -di alpine:3.8 sh`

# Make sure the target directory does not exist
$ docker exec "$CONTAINER_ID" sh -c 'ls -la /containertestdir'
ls: /containertestdir: No such file or directory

# Copy the files with 'docker cp'
$ docker cp testdir "$CONTAINER_ID":/containertestdir

# Verify the files were copied by running 'ls -la' in the container
$ docker exec "$CONTAINER_ID" sh -c 'ls -la /containertestdir'
total 8
drwxr-xr-x    2 root     root          4096 Oct 10 13:15 .
drwxr-xr-x    1 root     root          4096 Oct 10 13:15 ..
-rwxr-xr-x    1 root     root             0 Oct 10 13:15 aaa
-rwxr-xr-x    1 root     root             0 Oct 10 13:15 bbb

您可以复制如下目录:

docker cp /tmp/test mydocker:/tmp/test

不需要指定递归。