f4dc46cb05
The purely local non-device (vfat/iso9660) sources were broken by the last set of changes here. This restores them to functional. If the seed is from a device, then the default behavior is to be 'net' mode. For seed via cmdline, the user can specify 'ds=nocloud-net' and for seed via filesystem seed dir, they can just populate the other directory. To make it easier, when attaching a seed device, the user does not need to specify 'dsmode' of 'net' in the metadata file. They still can, but that is the default. It seems that that is more likely to be what is desired.
226 lines
7.3 KiB
Python
226 lines
7.3 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2009-2010 Canonical Ltd.
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# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
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#
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# Author: Scott Moser <scott.moser@canonical.com>
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# Author: Juerg Hafliger <juerg.haefliger@hp.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import cloudinit.DataSource as DataSource
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from cloudinit import seeddir as base_seeddir
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from cloudinit import log
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import cloudinit.util as util
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import errno
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import subprocess
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class DataSourceNoCloud(DataSource.DataSource):
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metadata = None
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userdata = None
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userdata_raw = None
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supported_seed_starts = ("/", "file://")
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dsmode = "local"
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seed = None
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cmdline_id = "ds=nocloud"
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seeddir = base_seeddir + '/nocloud'
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def __str__(self):
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mstr = "DataSourceNoCloud"
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mstr = mstr + " [seed=%s]" % self.seed
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return(mstr)
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def get_data(self):
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defaults = {
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"instance-id": "nocloud", "dsmode": self.dsmode
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}
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found = []
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md = {}
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ud = ""
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try:
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# parse the kernel command line, getting data passed in
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if parse_cmdline_data(self.cmdline_id, md):
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found.append("cmdline")
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except:
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util.logexc(log)
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return False
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# check to see if the seeddir has data.
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seedret = {}
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if util.read_optional_seed(seedret, base=self.seeddir + "/"):
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md = util.mergedict(md, seedret['meta-data'])
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ud = seedret['user-data']
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found.append(self.seeddir)
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log.debug("using seeded cache data in %s" % self.seeddir)
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fslist = util.find_devs_with("TYPE=vfat")
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fslist.extend(util.find_devs_with("TYPE=iso9660"))
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label_list = util.find_devs_with("LABEL=cidata")
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devlist = list(set(fslist) & set(label_list))
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devlist.sort(reverse=True)
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for dev in devlist:
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try:
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(newmd, newud) = util.mount_callback_umount(dev,
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util.read_seeded)
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md = util.mergedict(newmd, md)
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ud = newud
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# for seed from a device, the default mode is 'net'.
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# that is more likely to be what is desired.
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# If they want dsmode of local, then they must
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# specify that.
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if 'dsmode' not in md:
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md['dsmode'] = "net"
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log.debug("using data from %s" % dev)
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found.append(dev)
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break
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except OSError, e:
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if e.errno != errno.ENOENT:
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raise
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except util.mountFailedError:
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log.warn("Failed to mount %s when looking for seed" % dev)
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# there was no indication on kernel cmdline or data
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# in the seeddir suggesting this handler should be used.
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if len(found) == 0:
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return False
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seeded_interfaces = None
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# the special argument "seedfrom" indicates we should
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# attempt to seed the userdata / metadata from its value
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# its primarily value is in allowing the user to type less
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# on the command line, ie: ds=nocloud;s=http://bit.ly/abcdefg
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if "seedfrom" in md:
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seedfrom = md["seedfrom"]
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seedfound = False
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for proto in self.supported_seed_starts:
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if seedfrom.startswith(proto):
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seedfound = proto
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break
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if not seedfound:
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log.debug("seed from %s not supported by %s" %
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(seedfrom, self.__class__))
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return False
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if 'network-interfaces' in md:
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seeded_interfaces = self.dsmode
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# this could throw errors, but the user told us to do it
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# so if errors are raised, let them raise
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(md_seed, ud) = util.read_seeded(seedfrom, timeout=None)
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log.debug("using seeded cache data from %s" % seedfrom)
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# values in the command line override those from the seed
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md = util.mergedict(md, md_seed)
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found.append(seedfrom)
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md = util.mergedict(md, defaults)
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# update the network-interfaces if metadata had 'network-interfaces'
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# entry and this is the local datasource, or 'seedfrom' was used
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# and the source of the seed was self.dsmode
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# ('local' for NoCloud, 'net' for NoCloudNet')
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if ('network-interfaces' in md and
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(self.dsmode in ("local", seeded_interfaces))):
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log.info("updating network interfaces from nocloud")
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util.write_file("/etc/network/interfaces",
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md['network-interfaces'])
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try:
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(out, err) = util.subp(['ifup', '--all'])
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if len(out) or len(err):
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log.warn("ifup --all had stderr: %s" % err)
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except subprocess.CalledProcessError as exc:
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log.warn("ifup --all failed: %s" % (exc.output[1]))
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self.seed = ",".join(found)
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self.metadata = md
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self.userdata_raw = ud
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if md['dsmode'] == self.dsmode:
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return True
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log.debug("%s: not claiming datasource, dsmode=%s" %
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(self, md['dsmode']))
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return False
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# returns true or false indicating if cmdline indicated
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# that this module should be used
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# example cmdline:
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# root=LABEL=uec-rootfs ro ds=nocloud
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def parse_cmdline_data(ds_id, fill, cmdline=None):
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if cmdline is None:
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cmdline = util.get_cmdline()
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cmdline = " %s " % cmdline
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if not (" %s " % ds_id in cmdline or " %s;" % ds_id in cmdline):
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return False
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argline = ""
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# cmdline can contain:
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# ds=nocloud[;key=val;key=val]
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for tok in cmdline.split():
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if tok.startswith(ds_id):
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argline = tok.split("=", 1)
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# argline array is now 'nocloud' followed optionally by
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# a ';' and then key=value pairs also terminated with ';'
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tmp = argline[1].split(";")
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if len(tmp) > 1:
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kvpairs = tmp[1:]
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else:
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kvpairs = ()
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# short2long mapping to save cmdline typing
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s2l = {"h": "local-hostname", "i": "instance-id", "s": "seedfrom"}
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for item in kvpairs:
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try:
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(k, v) = item.split("=", 1)
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except:
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k = item
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v = None
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if k in s2l:
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k = s2l[k]
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fill[k] = v
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return(True)
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class DataSourceNoCloudNet(DataSourceNoCloud):
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cmdline_id = "ds=nocloud-net"
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supported_seed_starts = ("http://", "https://", "ftp://")
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seeddir = base_seeddir + '/nocloud-net'
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dsmode = "net"
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datasources = (
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(DataSourceNoCloud, (DataSource.DEP_FILESYSTEM, )),
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(DataSourceNoCloudNet,
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(DataSource.DEP_FILESYSTEM, DataSource.DEP_NETWORK)),
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)
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# return a list of data sources that match this set of dependencies
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def get_datasource_list(depends):
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return(DataSource.list_from_depends(depends, datasources))
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