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# Copyright 2017 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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/>.
#
# =*= License: GPL-3+ =*=
import logging
import os
import tempfile
import cliapp
import vmdb
class MountPlugin(cliapp.Plugin):
def enable(self):
self.app.step_runners.add(MountStepRunner())
class MountStepRunner(vmdb.StepRunnerInterface):
virtuals = [
['none', '/proc', 'proc'],
['none', '/dev', 'devtmpfs'],
['none', '/dev/pts', 'devpts'],
['none', '/dev/shm', 'tmpfs'],
['none', '/run', 'tmpfs'],
['none', '/run/lock', 'tmpfs'],
['none', '/sys', 'sysfs'],
]
def get_required_keys(self):
return ['mount', 'fs-tag']
def run(self, step, settings, state):
rootfs = self.mount_rootfs(step, settings, state)
self.mount_virtuals(rootfs, state)
def teardown(self, step, settings, state):
self.unmount_virtuals(state)
self.unmount_rootfs(step, settings, state)
def mount_rootfs(self, step, settings, state):
if not hasattr(state, 'mounts'):
state.mounts = {}
part_tag = step['mount']
fs_tag = step['fs-tag']
if fs_tag in state.mounts:
raise Exception('fs-tag {} already used'.format(fs_tag))
device = state.parts[part_tag]
mount_point = tempfile.mkdtemp()
vmdb.runcmd(['mount', device, mount_point])
state.mounts[fs_tag] = mount_point
return mount_point
def unmount_rootfs(self, step, settings, state):
fs_tag = step['fs-tag']
mount_point = state.mounts[fs_tag]
vmdb.runcmd(['umount', mount_point])
os.rmdir(mount_point)
def mount_virtuals(self, rootfs, state):
if not hasattr(state, 'virtuals'):
state.virtuals = []
for device, mount_point, fstype in self.virtuals:
path = os.path.join(rootfs, './' + mount_point)
if not os.path.exists(path):
os.mkdir(path)
vmdb.runcmd(['mount', '-t', fstype, device, path])
state.virtuals.append(path)
logging.debug('mounted virtuals: %r', state.virtuals)
def unmount_virtuals(self, state):
logging.debug('unmounting virtuals: %r', state.virtuals)
for mount_point in reversed(state.virtuals):
try:
vmdb.runcmd(['umount', mount_point])
except cliapp.AppException:
vmdb.error('Something went wrong while unmounting. Ignoring.')
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