kpod-cp.1.md

% kpod(1) kpod-cp - Copy content between container's file system and the host % Dan Walsh

kpod-cp "1" "August 2017" "kpod"

NAME

kpod-cp - Copy files/folders between a container and the local filesystem.

Description

We chose not to implement the cp feature in kpod even though the upstream Docker project has it. We have a much stronger capability. Using standard kpod-mount and kpod-umount, we can take advantage of the entire linux tool chain, rather then just cp.

If a user wants to copy contents out of a container or into a container, they can execute a few simple commands.

You can copy from the container's file system to the local machine or the reverse, from the local filesystem to the container.

If you want to copy the /etc/foobar directory out of a container and onto /tmp on the host, you could execute the following commands:

mnt=$(kpod mount CONTAINERID)
cp -R ${mnt}/etc/foobar /tmp
kpod umount CONTAINERID

If you want to untar a tar ball into a container, you can execute these commands:

mnt=$(kpod mount CONTAINERID)
tar xf content.tgz -C ${mnt}
kpod umount CONTAINERID

One last example, if you want to install a package into a container that does not have dnf installed, you could execute something like:

mnt=$(kpod mount CONTAINERID)
dnf install --installroot=${mnt} httpd
chroot ${mnt} rm -rf /var/log/dnf /var/cache/dnf
kpod umount CONTAINERID

This shows that using kpod mount and kpod umount you can use all of the standard linux tools for moving files into and out of containers, not just the cp command.

SEE ALSO

kpod(1), kpod-mount(1), kpod-umount(1)