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import copy
import glob
import fnmatch
import os
import logging
import yaml
log = logging.getLogger("subiquitycore.netplan")
def _sanitize_inteface_config(iface_config):
for ap, ap_config in iface_config.get('access-points', {}).items():
if 'password' in ap_config:
ap_config['password'] = '<REDACTED>'
def sanitize_interface_config(iface_config):
iface_config = copy.deepcopy(iface_config)
_sanitize_inteface_config(iface_config)
return iface_config
def sanitize_config(config):
"""Return a copy of config with passwords redacted."""
config = copy.deepcopy(config)
interfaces = config.get('network', {}).get('wifis', {}).items()
for iface, iface_config in interfaces:
_sanitize_inteface_config(iface_config)
return config
class Config:
"""A NetplanConfig represents the network config for a system.
Call parse_netplan_config() with each piece of yaml config, and then
call config_for_device to get the config that matches a particular
network device, if any.
"""
def __init__(self):
self.physical_devices = []
self.virtual_devices = []
self.config = {}
def parse_netplan_config(self, config):
try:
self.config = config = yaml.safe_load(config)
except yaml.ReaderError as e:
log.info("could not parse config: %s", e)
return
network = config.get('network')
if network is None:
log.info("no 'network' key in config")
return
version = network.get("version")
if version != 2:
log.info("network has no/unexpected version %s", version)
return
for phys_key in 'ethernets', 'wifis':
for dev, dev_config in network.get(phys_key, {}).items():
self.physical_devices.append(_PhysicalDevice(dev, dev_config))
for virt_key in 'bonds', 'vlans':
for dev, dev_config in network.get(virt_key, {}).items():
self.virtual_devices.append(_VirtualDevice(dev, dev_config))
def config_for_device(self, link):
if link.is_virtual:
for dev in self.virtual_devices:
if dev.name == link.name:
return copy.deepcopy(dev.config)
else:
allowed_matches = ('macaddress',)
match_key = 'match'
for dev in self.physical_devices:
if dev.matches_link(link):
config = copy.deepcopy(dev.config)
if match_key in config:
match = {k: v for k, v in config[match_key].items()
if k in allowed_matches}
if match:
config[match_key] = match
else:
del config[match_key]
return config
return {}
def load_from_root(self, root):
for path in configs_in_root(root):
try:
fp = open(path)
except OSError:
log.exception("opening %s failed", path)
with fp:
self.parse_netplan_config(fp.read())
class _PhysicalDevice:
def __init__(self, name, config):
match = config.get('match')
if match is None:
self.match_name = name
self.match_mac = None
self.match_driver = None
else:
self.match_name = match.get('name')
self.match_mac = match.get('macaddress')
self.match_driver = match.get('driver')
self.config = config
log.debug(
"config for %s = %s" % (
name, sanitize_interface_config(self.config)))
def matches_link(self, link):
if self.match_name is not None:
matches_name = fnmatch.fnmatch(link.name, self.match_name)
else:
matches_name = True
if self.match_mac is not None:
matches_mac = self.match_mac == link.hwaddr
else:
matches_mac = True
if self.match_driver is not None:
matches_driver = self.match_driver == link.driver
else:
matches_driver = True
return matches_name and matches_mac and matches_driver
class _VirtualDevice:
def __init__(self, name, config):
self.name = name
self.config = config
log.debug(
"config for %s = %s" % (
name, sanitize_interface_config(self.config)))
def configs_in_root(root, masked=False):
"""Return a list of all netplan configs under root.
The list is ordered in increasing precedence.
@param masked: if True, include config paths that are masked
by the same basename in a different directory."""
if not os.path.isabs(root):
root = os.path.abspath(root)
wildcard = "*.yaml"
dirs = {"lib": "0", "etc": "1", "run": "2"}
rootlen = len(root)
paths = []
for d in dirs:
paths.extend(glob.glob(os.path.join(root, d, "netplan", wildcard)))
def mykey(path):
"""returned key is basename + string-precidence based on dir."""
bname = os.path.basename(path)
bdir = path[rootlen + 1]
bdir = bdir[:bdir.find(os.path.sep)]
return "%s/%s" % (bname, bdir)
if not masked:
paths = {os.path.basename(p): p for p in paths}.values()
return sorted(paths, key=mykey)