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# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import logging
import os
from cloudinit import sources, subp, util
from cloudinit.event import EventScope, EventType
from cloudinit.net import eni
from cloudinit.sources.DataSourceIBMCloud import get_ibm_platform
from cloudinit.sources.helpers import openstack
LOG = logging.getLogger(__name__)
# Various defaults/constants...
DEFAULT_IID = "iid-dsconfigdrive"
DEFAULT_METADATA = {
"instance-id": DEFAULT_IID,
}
FS_TYPES = ("vfat", "iso9660")
LABEL_TYPES = ("config-2", "CONFIG-2")
POSSIBLE_MOUNTS = ("sr", "cd")
OPTICAL_DEVICES = tuple(
("/dev/%s%s" % (z, i) for z in POSSIBLE_MOUNTS for i in range(2))
)
class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
dsname = "ConfigDrive"
supported_update_events = {
EventScope.NETWORK: {
EventType.BOOT_NEW_INSTANCE,
EventType.BOOT,
EventType.BOOT_LEGACY,
EventType.HOTPLUG,
}
}
def __init__(self, sys_cfg, distro, paths):
super(DataSourceConfigDrive, self).__init__(sys_cfg, distro, paths)
self.source = None
self.seed_dir = os.path.join(paths.seed_dir, "config_drive")
self.version = None
self.ec2_metadata = None
self._network_config = None
self.network_json = sources.UNSET
self.network_eni = None
self.known_macs = None
self.files = {}
def __str__(self):
root = sources.DataSource.__str__(self)
mstr = "%s [%s,ver=%s]" % (root, self.dsmode, self.version)
mstr += "[source=%s]" % (self.source)
return mstr
def _get_data(self):
found = None
md = {}
results = {}
for sdir in (self.seed_dir, "/config-drive"):
if not os.path.isdir(sdir):
continue
try:
results = read_config_drive(sdir)
found = sdir
break
except openstack.NonReadable:
util.logexc(LOG, "Failed reading config drive from %s", sdir)
if not found:
dslist = self.sys_cfg.get("datasource_list")
for dev in find_candidate_devs(dslist=dslist):
mtype = None
if util.is_BSD():
if dev.startswith("/dev/cd"):
mtype = "cd9660"
try:
results = util.mount_cb(
dev, read_config_drive, mtype=mtype
)
found = dev
except openstack.NonReadable:
pass
except util.MountFailedError:
pass
except openstack.BrokenMetadata:
util.logexc(LOG, "Broken config drive: %s", dev)
if found:
break
if not found:
return False
md = results.get("metadata", {})
md = util.mergemanydict([md, DEFAULT_METADATA])
self.dsmode = self._determine_dsmode(
[
results.get("dsmode"),
self.ds_cfg.get("dsmode"),
sources.DSMODE_PASS if results["version"] == 1 else None,
]
)
if self.dsmode == sources.DSMODE_DISABLED:
return False
prev_iid = get_previous_iid(self.paths)
cur_iid = md["instance-id"]
if prev_iid != cur_iid:
# better would be to handle this centrally, allowing
# the datasource to do something on new instance id
# note, networking is only rendered here if dsmode is DSMODE_PASS
# which means "DISABLED, but render files and networking"
on_first_boot(
results,
distro=self.distro,
network=self.dsmode == sources.DSMODE_PASS,
)
# This is legacy and sneaky. If dsmode is 'pass' then do not claim
# the datasource was used, even though we did run on_first_boot above.
if self.dsmode == sources.DSMODE_PASS:
LOG.debug(
"%s: not claiming datasource, dsmode=%s", self, self.dsmode
)
return False
self.source = found
self.metadata = md
self.ec2_metadata = results.get("ec2-metadata")
self.userdata_raw = results.get("userdata")
self.version = results["version"]
self.files.update(results.get("files", {}))
vd = results.get("vendordata")
try:
self.vendordata_raw = sources.convert_vendordata(vd)
except ValueError as e:
LOG.warning("Invalid content in vendor-data: %s", e)
self.vendordata_raw = None
vd2 = results.get("vendordata2")
try:
self.vendordata2_raw = sources.convert_vendordata(vd2)
except ValueError as e:
LOG.warning("Invalid content in vendor-data2: %s", e)
self.vendordata2_raw = None
# network_config is an /etc/network/interfaces formatted file and is
# obsolete compared to networkdata (from network_data.json) but both
# might be present.
self.network_eni = results.get("network_config")
self.network_json = results.get("networkdata")
return True
def check_instance_id(self, sys_cfg):
# quickly (local check only) if self.instance_id is still valid
return sources.instance_id_matches_system_uuid(self.get_instance_id())
@property
def network_config(self):
if self._network_config is None:
if self.network_json not in (None, sources.UNSET):
LOG.debug("network config provided via network_json")
self._network_config = openstack.convert_net_json(
self.network_json, known_macs=self.known_macs
)
elif self.network_eni is not None:
self._network_config = eni.convert_eni_data(self.network_eni)
LOG.debug("network config provided via converted eni data")
else:
LOG.debug("no network configuration available")
return self._network_config
@property
def platform(self):
return "openstack"
def _get_subplatform(self):
"""Return the subplatform metadata source details."""
if self.source.startswith("/dev"):
subplatform_type = "config-disk"
else:
subplatform_type = "seed-dir"
return "%s (%s)" % (subplatform_type, self.source)
def read_config_drive(source_dir):
reader = openstack.ConfigDriveReader(source_dir)
finders = [
(reader.read_v2, [], {}),
(reader.read_v1, [], {}),
]
excps = []
for (functor, args, kwargs) in finders:
try:
return functor(*args, **kwargs)
except openstack.NonReadable as e:
excps.append(e)
raise excps[-1]
def get_previous_iid(paths):
# interestingly, for this purpose the "previous" instance-id is the current
# instance-id. cloud-init hasn't moved them over yet as this datasource
# hasn't declared itself found.
fname = os.path.join(paths.get_cpath("data"), "instance-id")
try:
return util.load_text_file(fname).rstrip("\n")
except IOError:
return None
def on_first_boot(data, distro=None, network=True):
"""Performs any first-boot actions using data read from a config-drive."""
if not isinstance(data, dict):
raise TypeError(
"Config-drive data expected to be a dict; not %s" % (type(data))
)
if network:
net_conf = data.get("network_config", "")
if net_conf and distro:
LOG.warning("Updating network interfaces from config drive")
distro.apply_network_config(eni.convert_eni_data(net_conf))
write_injected_files(data.get("files"))
def write_injected_files(files):
if files:
LOG.debug("Writing %s injected files", len(files))
for (filename, content) in files.items():
if not filename.startswith(os.sep):
filename = os.sep + filename
try:
util.write_file(filename, content, mode=0o660)
except IOError:
util.logexc(LOG, "Failed writing file: %s", filename)
def find_candidate_devs(probe_optical=True, dslist=None):
"""Return a list of devices that may contain the config drive.
The returned list is sorted by search order where the first item has
should be searched first (highest priority)
config drive v1:
Per documentation, this is "associated as the last available disk on the
instance", and should be VFAT.
Currently, we do not restrict search list to "last available disk"
config drive v2:
Disk should be:
* either vfat or iso9660 formatted
* labeled with 'config-2' or 'CONFIG-2'
"""
if dslist is None:
dslist = []
# query optical drive to get it in blkid cache for 2.6 kernels
if probe_optical:
for device in OPTICAL_DEVICES:
try:
util.find_devs_with(path=device)
except subp.ProcessExecutionError:
pass
by_fstype = []
for fs_type in FS_TYPES:
by_fstype.extend(util.find_devs_with("TYPE=%s" % (fs_type)))
by_label = []
for label in LABEL_TYPES:
by_label.extend(util.find_devs_with("LABEL=%s" % (label)))
# give preference to "last available disk" (vdb over vda)
# note, this is not a perfect rendition of that.
by_fstype.sort(reverse=True)
by_label.sort(reverse=True)
# combine list of items by putting by-label items first
# followed by fstype items, but with dupes removed
candidates = by_label + [d for d in by_fstype if d not in by_label]
# We are looking for a block device or partition with necessary label or
# an unpartitioned block device (ex sda, not sda1)
devices = [
d for d in candidates if d in by_label or not util.is_partition(d)
]
LOG.debug("devices=%s dslist=%s", devices, dslist)
if devices and "IBMCloud" in dslist:
# IBMCloud uses config-2 label, but limited to a single UUID.
ibm_platform, ibm_path = get_ibm_platform()
if ibm_path in devices:
devices.remove(ibm_path)
LOG.debug(
"IBMCloud device '%s' (%s) removed from candidate list",
ibm_path,
ibm_platform,
)
return devices
# Legacy: Must be present in case we load an old pkl object
DataSourceConfigDriveNet = DataSourceConfigDrive
# Used to match classes to dependencies
datasources = [
(DataSourceConfigDrive, (sources.DEP_FILESYSTEM,)),
]
# Return a list of data sources that match this set of dependencies
def get_datasource_list(depends):
return sources.list_from_depends(depends, datasources)
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