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buildah-mount "1" "March 2017" "buildah"


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


buildah mount [container ...]


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.


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



Output in JSON format.


buildah mount working-container
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
# cp foobar  /var/lib/containers/storage/overlay/f8cac5cce73e5102ab321cc5b57c0824035b5cb82b6822e3c86ebaff69fefa9c/merged
# buildah unmount working-container
# exit
$ buildah commit  working-container newimage


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