name : DataSourceNWCS.py # Author: NWCS.sh <foss@nwcs.sh> # # This file is part of cloud-init. See LICENSE file for license information. import logging from requests import exceptions from cloudinit import dmi, net, sources, subp, url_helper, util from cloudinit.net.dhcp import NoDHCPLeaseError from cloudinit.net.ephemeral import EphemeralDHCPv4 LOG = logging.getLogger(__name__) BASE_URL_V1 = "http://169.254.169.254/api/v1" BUILTIN_DS_CONFIG = { "metadata_url": BASE_URL_V1 + "/metadata", } MD_RETRIES = 30 MD_TIMEOUT = 5 MD_WAIT_RETRY = 5 class DataSourceNWCS(sources.DataSource): dsname = "NWCS" def __init__(self, sys_cfg, distro, paths): sources.DataSource.__init__(self, sys_cfg, distro, paths) self.distro = distro self.metadata = dict() self.ds_cfg = util.mergemanydict( [ util.get_cfg_by_path(sys_cfg, ["datasource", "NWCS"], {}), BUILTIN_DS_CONFIG, ] ) self.metadata_address = self.ds_cfg["metadata_url"] self.retries = self.ds_cfg.get("retries", MD_RETRIES) self.timeout = self.ds_cfg.get("timeout", MD_TIMEOUT) self.wait_retry = self.ds_cfg.get("wait_retry", MD_WAIT_RETRY) self._network_config = sources.UNSET self.dsmode = sources.DSMODE_NETWORK def _get_data(self): md = self.get_metadata() if md is None: raise RuntimeError("failed to get metadata") self.metadata_full = md self.metadata["instance-id"] = md["instance-id"] self.metadata["public-keys"] = md["public-keys"] self.metadata["network"] = md["network"] self.metadata["local-hostname"] = md["hostname"] self.userdata_raw = md.get("userdata", None) self.vendordata_raw = md.get("vendordata", None) return True def get_metadata(self): try: LOG.info("Attempting to get metadata via DHCP") with EphemeralDHCPv4( self.distro, iface=net.find_fallback_nic(), connectivity_url_data={ "url": BASE_URL_V1 + "/metadata/instance-id", }, ): return read_metadata( self.metadata_address, timeout=self.timeout, sec_between=self.wait_retry, retries=self.retries, ) except ( NoDHCPLeaseError, subp.ProcessExecutionError, RuntimeError, exceptions.RequestException, ) as e: LOG.error("DHCP failure: %s", e) raise @property def network_config(self): LOG.debug("Attempting network configuration") if self._network_config is None: LOG.warning( "Found None as cached _network_config, resetting to %s", sources.UNSET, ) self._network_config = sources.UNSET if self._network_config != sources.UNSET: return self._network_config if not self.metadata["network"]["config"]: raise RuntimeError("Unable to get metadata from server") # metadata sends interface names, but we dont want to use them for i in self.metadata["network"]["config"]: iface_name = get_interface_name(i["mac_address"]) if iface_name: LOG.info("Overriding %s with %s", i["name"], iface_name) i["name"] = iface_name self._network_config = self.metadata["network"] return self._network_config @staticmethod def ds_detect(): return "NWCS" == dmi.read_dmi_data("system-manufacturer") def get_interface_name(mac): macs_to_nic = net.get_interfaces_by_mac() if mac not in macs_to_nic: return None return macs_to_nic.get(mac) # Return a list of data sources that match this set of dependencies def get_datasource_list(depends): return sources.list_from_depends(depends, datasources) def read_metadata(url, timeout=2, sec_between=2, retries=30): response = url_helper.readurl( url, timeout=timeout, sec_between=sec_between, retries=retries ) if not response.ok(): raise RuntimeError("unable to read metadata at %s" % url) return util.load_json(response.contents.decode()) # Used to match classes to dependencies datasources = [ (DataSourceNWCS, (sources.DEP_FILESYSTEM,)), ]