Set default label for XFS disks

As described, we want to set the default label for XFS disks to the
shorter value.

For example, you hit this when setting the old FS_TYPE environment
variable to 'xfs' (which sets the "root-fs-type" parameter, which gets
passed through to 'type'; but does not set a default label).

Change-Id: I41dce6e25766562db4366021309b8c2b74a8ab80
Closes-Bug: 1742170
This commit is contained in:
Mark Hamzy 2018-01-09 12:20:51 -06:00 committed by Ian Wienand
parent 894de9d9af
commit c7da8bc90a
3 changed files with 34 additions and 15 deletions

View File

@ -172,13 +172,20 @@ class BlockDevice(object):
trap - EXIT
"""
def _merge_into_config(self):
"""Merge old (default) config into new
def _merge_rootfs_params(self):
"""Merge rootfs related parameters into configuration
To maintain compatability with some old block-device
environment variables from before we had a specific
block-device config, disk-image-create provides a "parameters"
file that translates the old bash-environment variables into a
YAML based configuration file (``self.params``).
Here we merge the values in this parameters file that relate
to the root file-system into the final configuration. We look
for the ``mkfs_root`` node in the new config, and pull the
relevant settings from the parameters into it.
There is the need to be compatible using some old environment
variables. This is done in the way, that if there is no
explicit value given, these values are inserted into the current
configuration.
"""
for entry in self.config:
for k, v in entry.items():
@ -198,7 +205,18 @@ class BlockDevice(object):
if self.params['root-label'] is not None:
v['label'] = self.params['root-label']
else:
v['label'] = "cloudimg-rootfs"
# The default label is "cloudimg-rootfs"
# for historical reasons (upstream
# images/EC2 defaults/cloud-init etc). We
# want to remain backwards compatible, but
# unfortunately that's too long for XFS so
# we've decided on 'img-rootfs' in that
# case. Note there's separate checks if
# the label is specified explicitly.
if v.get('type') == 'xfs':
v['label'] = 'img-rootfs'
else:
v['label'] = 'cloudimg-rootfs'
def __init__(self, params):
"""Create BlockDevice object
@ -241,7 +259,7 @@ class BlockDevice(object):
logger.debug("Config before merge [%s]", self.config)
self.config = config_tree_to_graph(self.config)
logger.debug("Config before merge [%s]", self.config)
self._merge_into_config()
self._merge_rootfs_params()
logger.debug("Final config [%s]", self.config)
# Write the final config
with open(self.config_json_file_name, "wt") as fd:
@ -282,18 +300,21 @@ class BlockDevice(object):
:param symbol: the symbol to get
"""
logger.info("Getting value for [%s]", symbol)
if symbol == "root-label":
root_mount = self._config_get_mount("/")
root_fs = self._config_get_mkfs(root_mount['base'])
logger.debug("root-label [%s]", root_fs['label'])
print("%s" % root_fs['label'])
return 0
if symbol == "root-fstype":
root_mount = self._config_get_mount("/")
root_fs = self._config_get_mkfs(root_mount['base'])
logger.debug("root-fstype [%s]", root_fs['type'])
print("%s" % root_fs['type'])
return 0
if symbol == 'mount-points':
mount_points = self._config_get_all_mount_points()
# we return the mountpoints joined by a pipe, because it is not

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@ -58,13 +58,6 @@ class FilesystemNode(NodeBase):
if self.label is None:
self.label = self.name
# Historic reasons - this will hopefully vanish in one of
# the next major releases
if self.label == "cloudimg-rootfs" and self.type == "xfs":
logger.warning("Default label [cloudimg-rootfs] too long for xfs "
"file system - using [img-rootfs] instead")
self.label = "img-rootfs"
# ensure we don't already have a fs with this label ... they
# all must be unique.
if 'fs_labels' in self.state:

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@ -0,0 +1,5 @@
---
fixes:
- |
This fixes bug 1742170 where the grub root label is different than the
file system label when booting from a whole disk image.