buildah-mount man page

buildah-mount — Mount a working container's root filesystem.

Synopsis

buildah mount [container ...]

Description

Mounts the specified container's root file system in a location which can be accessed from the host, and returns its location.

If the mount command is invoked without any arguments, the tool will list all of the currently mounted containers.

When running in rootless mode, mount runs in a different namespace so that the mounted volume might not be accessible from the host when using a driver different than vfs.  To be able to access the file system mounted, you might need to create the mount namespace separately as part of buildah unshare.  In the environment created with buildah unshare you can then use buildah mount and have access to the mounted file system.

Return Value

The location of the mounted file system.  On error an empty string and errno is returned.

Options

--notruncate
Do not truncate IDs in output.

Example

buildah mount c831414b10a3
/var/lib/containers/storage/overlay2/f3ac502d97b5681989dff84dfedc8354239bcecbdc2692f9a639f4e080a02364/merged
buildah mount
c831414b10a3 /var/lib/containers/storage/overlay2/f3ac502d97b5681989dff84dfedc8354239bcecbdc2692f9a639f4e080a02364/merged
a7060253093b /var/lib/containers/storage/overlay2/0ff7d7ca68bed1ace424f9df154d2dd7b5a125c19d887f17653cbcd5b6e30ba1/merged
buildah mount efdb54a2f0d7 644db0db094c adffbea87fa8
efdb54a2f0d7 /var/lib/containers/storage/overlay/f8cac5cce73e5102ab321cc5b57c0824035b5cb82b6822e3c86ebaff69fefa9c/merged
644db0db094c /var/lib/containers/storage/overlay/c3ec418be5bda5b72dca74c4d397e05829fe62ecd577dd7518b5f7fc1ca5f491/merged
adffbea87fa8 /var/lib/containers/storage/overlay/03a071f206f70f4fcae5379bd5126be86b5352dc2a0c3449cd6fca01b77ea868/merged

If running in rootless mode, you need to do a buildah unshare first to use the mount point.

$ buildah unshare
# buildah mount efdb54a2f0d7
efdb54a2f0d7 /var/lib/containers/storage/overlay/f8cac5cce73e5102ab321cc5b57c0824035b5cb82b6822e3c86ebaff69fefa9c/merged
# cp foobar  /var/lib/containers/storage/overlay/f8cac5cce73e5102ab321cc5b57c0824035b5cb82b6822e3c86ebaff69fefa9c/merged
# buildah unmount efdb54a2f0d7
# exit
$ buildah commit  efdb54a2f0d7 newimage

See Also

buildah(1), buildah-unshare(1), buildah-umount(1)

Referenced By

buildah(1), buildah-unshare(1).

March 2017 buildah