def test_atomic_write_create(tmpdir):
path = str(tmpdir.join("file"))
fileUtils.atomic_write(path, b"new")
with open(path, "rb") as f:
assert f.read() == b"new"
assert stat.S_IMODE(os.stat(path).st_mode) == 0o644
def test_atomic_write_mode(tmpdir, mode):
path = str(tmpdir.join("file"))
# Create old file with default mode.
fileUtils.atomic_write(path, b"old")
fileUtils.atomic_write(path, b"new", mode=mode)
with open(path, "rb") as f:
assert f.read() == b"new"
assert stat.S_IMODE(os.stat(path).st_mode) == mode
def test_atomic_write_replace(tmpdir, mode):
path = str(tmpdir.join("file"))
# Create old file with differnt mode.
fileUtils.atomic_write(path, b"old")
os.chmod(path, mode)
fileUtils.atomic_write(path, b"new")
with open(path, "rb") as f:
assert f.read() == b"new"
assert stat.S_IMODE(os.stat(path).st_mode) == 0o644
def configure():
"""
Disable and mask lvmetad daemon, and install vdsm managed lvmlocal.conf.
"""
if not _lvm_conf_configured():
backup = fileUtils.backup_file(_LVMLOCAL_CUR)
if backup:
_log("Previous lvmlocal.conf copied to %s", backup)
# TODO: we should merge the contents of the exisiting file and vdsm
# settings, in case the user has some useful setting in the
# lvmlocal.conf.
_log("Installing %s at %s", _LVMLOCAL_VDSM, _LVMLOCAL_CUR)
with open(_LVMLOCAL_VDSM, "rb") as f:
fileUtils.atomic_write(_LVMLOCAL_CUR, f.read(), relabel=True)
def configure():
"""
Set up the multipath daemon configuration to the known and
supported state. The original configuration, if any, is saved
"""
backup = fileUtils.backup_file(_CONF_FILE)
if backup:
sys.stdout.write("Previous multipath.conf copied to %s\n" % backup)
data = _CONF_DATA.encode('utf-8')
fileUtils.atomic_write(_CONF_FILE, data, relabel=True)
# We want to handle these cases:
#
# 1. multipathd is not running and the kernel module is not loaded. We
# don't have any online multipath devices, so there is nothing to
# reconfigure, but we want to make sure that multipathd is happy with
# new multipath configuration.
#
# 2. multipathd is not running but the kernel module is loaded. We may have
# online devices that need reconfiguration.
#
# 3. multipathd is running with older configuration not compatible with
# vdsm configuration.
#
# 4. multipathd is running with older vdsm configuration. Reloading is
# needed to update devices with new configuration.
#
# When we have online devices using incompatible configuration, they may
# use "user friendly" names (/dev/mapper/mpath{N}) instead of consistent
# names (/dev/mapper/{WWID}). Restarting multipathd with the new
# configuration will rename the devices, however due to multipathd bug,
# these devices may not pick all configuration changes. Reconfiguring
# multipathd ensures that all configurations changes are applied.
#
# To simplify handing of all cases, we first start multipathd service. This
# eliminates cases 1 and 2. Case 3 and 4 are handled by reconfiguring
# multipathd.
#
# If any of those steps fails, we want to fail the configuration.
service.service_start("multipathd")
commands.run([_MULTIPATHD.cmd, "reconfigure"])
def test_atomic_write_relabel(tmpdir):
path = str(tmpdir.join("file"))
# Create old file with non-default label.
fileUtils.atomic_write(path, b"old")
selinux.setfilecon(path, "unconfined_u:object_r:etc_t:s0")
fileUtils.atomic_write(path, b"new", relabel=True)
with open(path, "rb") as f:
assert f.read() == b"new"
assert stat.S_IMODE(os.stat(path).st_mode) == 0o644
# The label depends on the enviroment and selinux policy:
# - Locally we get: "unconfined_u:object_r:user_tmp_t:s0"
# - In mock we get: "unconfined_u:object_r:mock_var_lib_t:s0"
# So lets check what selinux.restorecon(path, force=True) is creating.
control = str(tmpdir.ensure("control"))
selinux.restorecon(control, force=True)
assert selinux.getfilecon(path)[1] == selinux.getfilecon(control)[1]
def configure():
"""
Disable and mask lvmetad daemon, and install vdsm managed lvmlocal.conf.
"""
if not _lvm_conf_configured():
backup = fileUtils.backup_file(_LVMLOCAL_CUR)
if backup:
_log("Previous lvmlocal.conf copied to %s", backup)
# TODO: we should merge the contents of the exisiting file and vdsm
# settings, in case the user has some useful setting in the
# lvmlocal.conf.
_log("Installing %s at %s", _LVMLOCAL_VDSM, _LVMLOCAL_CUR)
with open(_LVMLOCAL_VDSM, "rb") as f:
fileUtils.atomic_write(_LVMLOCAL_CUR, f.read(), relabel=True)
# TODO: remove disabling lvmetad once we don't support Fedora 30. On
# Fedora 31 and RHEL8 lvmetad is not supported anymore.
if not _lvmetad_configured():
_systemctl("mask", _LVMETAD_SERVICE, _LVMETAD_SOCKET)
_systemctl("disable", _LVMETAD_SERVICE, _LVMETAD_SOCKET)
_systemctl("stop", _LVMETAD_SERVICE, _LVMETAD_SOCKET)