buildah-mount - Mount a working container's root filesystem.
Contents
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 buildahunshare. In the
environment created with buildahunshare you can then use buildahmount and have access to the mounted
file system.
Example
buildah mount working-container
/var/lib/containers/storage/overlay2/f3ac502d97b5681989dff84dfedc8354239bcecbdc2692f9a639f4e080a02364/merged
buildah mount
working-container /var/lib/containers/storage/overlay2/f3ac502d97b5681989dff84dfedc8354239bcecbdc2692f9a639f4e080a02364/merged
fedora-working-container /var/lib/containers/storage/overlay2/0ff7d7ca68bed1ace424f9df154d2dd7b5a125c19d887f17653cbcd5b6e30ba1/merged
buildah mount working-container fedora-working-container ubi8-working-container
working-container /var/lib/containers/storage/overlay/f8cac5cce73e5102ab321cc5b57c0824035b5cb82b6822e3c86ebaff69fefa9c/merged
fedora-working-container /var/lib/containers/storage/overlay/c3ec418be5bda5b72dca74c4d397e05829fe62ecd577dd7518b5f7fc1ca5f491/merged
ubi8-working-container /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 working-container
/var/lib/containers/storage/overlay/f8cac5cce73e5102ab321cc5b57c0824035b5cb82b6822e3c86ebaff69fefa9c/merged
# cp foobar /var/lib/containers/storage/overlay/f8cac5cce73e5102ab321cc5b57c0824035b5cb82b6822e3c86ebaff69fefa9c/merged
# buildah unmount working-container
# exit
$ buildah commit working-container newimage
Name
buildah-mount - Mount a working container's root filesystem.
Options
--json
Output in JSON format.
Return Value
The location of the mounted file system. On error an empty string and errno is returned.
See Also
buildah(1), buildah-unshare(1), buildah-umount(1) buildah March 2017 buildah-mount(1)
Synopsis
buildahmount [container ...]
