#!/usr/bin/env python3 # # Copyright (C) 2022 VyOS maintainers and contributors # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 or later as # published by the Free Software Foundation. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # T4870: change underlaying container filesystem from vfs to overlay import os import shutil import sys from vyos.configtree import ConfigTree from vyos.utils.process import call if len(sys.argv) < 2: print("Must specify file name!") sys.exit(1) file_name = sys.argv[1] with open(file_name, 'r') as f: config_file = f.read() base = ['container', 'name'] config = ConfigTree(config_file) # Check if containers exist and we need to perform image manipulation if config.exists(base): for container in config.list_nodes(base): # Stop any given container first call(f'sudo systemctl stop vyos-container-{container}.service') # Export container image for later re-import to new filesystem. We store # the backup on a real disk as a tmpfs (like /tmp) could probably lack # memory if a host has too many containers stored. image_name = config.return_value(base + [container, 'image']) call(f'sudo podman image save --quiet --output /root/{container}.tar --format oci-archive {image_name}') # No need to adjust the strage driver online (this is only used for testing and # debugging on a live system) - it is already overlay2 when the migration script # is run during system update. But the specified driver in the image is actually # overwritten by the still present VFS filesystem on disk. Thus podman still # thinks it uses VFS until we delete the libpod directory under: # /usr/lib/live/mount/persistence/container/storage #call('sed -i "s/vfs/overlay2/g" /etc/containers/storage.conf /usr/share/vyos/templates/container/storage.conf.j2') base_path = '/usr/lib/live/mount/persistence/container/storage' for dir in ['libpod', 'vfs', 'vfs-containers', 'vfs-images', 'vfs-layers']: if os.path.exists(f'{base_path}/{dir}'): shutil.rmtree(f'{base_path}/{dir}') # Now all remaining information about VFS is gone and we operate in overlayfs2 # filesystem mode. Time to re-import the images. if config.exists(base): for container in config.list_nodes(base): # Export container image for later re-import to new filesystem image_name = config.return_value(base + [container, 'image']) image_path = f'/root/{container}.tar' call(f'sudo podman image load --quiet --input {image_path}') # Start any given container first call(f'sudo systemctl start vyos-container-{container}.service') # Delete temporary container image if os.path.exists(image_path): os.unlink(image_path)