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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 vmdb
class VirtualFilesystemMountPlugin(vmdb.Plugin):
def enable(self):
self.app.step_runners.add(VirtualFilesystemMountStepRunner())
class VirtualFilesystemMountStepRunner(vmdb.StepRunnerInterface):
virtuals = [
["none", "/proc", ["-t", "proc"]],
["/dev", "/dev", ["--bind"]],
["none", "/dev/pts", ["-t","devpts"]],
["none", "/dev/shm", ["-t","tmpfs"]],
["none", "/run", ["-t","tmpfs"]],
["none", "/run/lock", ["-t","tmpfs"]],
["none", "/sys", ["-t","sysfs"]],
]
def get_key_spec(self):
return {"virtual-filesystems": str}
def run(self, values, settings, state):
fstag = values["virtual-filesystems"]
mount_point = state.tags.get_builder_mount_point(fstag)
self.mount_virtuals(mount_point, state)
def teardown(self, values, settings, state):
self.unmount_virtuals(state)
def mount_virtuals(self, rootfs, state):
if not hasattr(state, "virtuals"):
state.virtuals = []
for device, mount_point, opts in self.virtuals:
path = os.path.normpath(os.path.join(rootfs, "./" + mount_point))
if os.path.ismount(path):
logging.debug("already mounted: %s", path)
continue
if not os.path.exists(path):
os.mkdir(path)
vmdb.runcmd(["mount", device, path] + opts)
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.unmount(mount_point)
except vmdb.NotMounted as e:
logging.warning(str(e))
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