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# Author: Eric Benner <ebenner@vultr.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import json
from cloudinit import log as log
from cloudinit import url_helper
from cloudinit import dmi
from cloudinit import util
from cloudinit import net
from cloudinit.net.dhcp import EphemeralDHCPv4, NoDHCPLeaseError
from functools import lru_cache
# Get LOG
LOG = log.getLogger(__name__)
@lru_cache()
def get_metadata(url, timeout, retries, sec_between, agent):
# Bring up interface
try:
with EphemeralDHCPv4(connectivity_url_data={"url": url}):
# Fetch the metadata
v1 = read_metadata(url, timeout, retries, sec_between, agent)
except (NoDHCPLeaseError) as exc:
LOG.error("Bailing, DHCP Exception: %s", exc)
raise
return json.loads(v1)
# Read the system information from SMBIOS
def get_sysinfo():
return {
'manufacturer': dmi.read_dmi_data("system-manufacturer"),
'subid': dmi.read_dmi_data("system-serial-number")
}
# Assumes is Vultr is already checked
def is_baremetal():
if get_sysinfo()['manufacturer'] != "Vultr":
return True
return False
# Confirm is Vultr
def is_vultr():
# VC2, VDC, and HFC use DMI
sysinfo = get_sysinfo()
if sysinfo['manufacturer'] == "Vultr":
return True
# Baremetal requires a kernel parameter
if "vultr" in util.get_cmdline().split():
return True
return False
# Read Metadata endpoint
def read_metadata(url, timeout, retries, sec_between, agent):
url = "%s/v1.json" % url
# Announce os details so we can handle non Vultr origin
# images and provide correct vendordata generation.
headers = {
'Metadata-Token': 'cloudinit',
'User-Agent': agent
}
response = url_helper.readurl(url,
timeout=timeout,
retries=retries,
headers=headers,
sec_between=sec_between)
if not response.ok():
raise RuntimeError("Failed to connect to %s: Code: %s" %
url, response.code)
return response.contents.decode()
# Wrapped for caching
@lru_cache()
def get_interface_map():
return net.get_interfaces_by_mac()
# Convert macs to nics
def get_interface_name(mac):
macs_to_nic = get_interface_map()
if mac not in macs_to_nic:
return None
return macs_to_nic.get(mac)
# Generate network configs
def generate_network_config(interfaces):
network = {
"version": 1,
"config": [
{
"type": "nameserver",
"address": [
"108.61.10.10"
]
}
]
}
# Prepare interface 0, public
if len(interfaces) > 0:
public = generate_public_network_interface(interfaces[0])
network['config'].append(public)
# Prepare additional interfaces, private
for i in range(1, len(interfaces)):
private = generate_private_network_interface(interfaces[i])
network['config'].append(private)
return network
# Input Metadata and generate public network config part
def generate_public_network_interface(interface):
interface_name = get_interface_name(interface['mac'])
if not interface_name:
raise RuntimeError(
"Interface: %s could not be found on the system" %
interface['mac'])
netcfg = {
"name": interface_name,
"type": "physical",
"mac_address": interface['mac'],
"accept-ra": 1,
"subnets": [
{
"type": "dhcp",
"control": "auto"
},
{
"type": "ipv6_slaac",
"control": "auto"
},
]
}
# Options that may or may not be used
if "mtu" in interface:
netcfg['mtu'] = interface['mtu']
if "accept-ra" in interface:
netcfg['accept-ra'] = interface['accept-ra']
if "routes" in interface:
netcfg['subnets'][0]['routes'] = interface['routes']
# Check for additional IP's
additional_count = len(interface['ipv4']['additional'])
if "ipv4" in interface and additional_count > 0:
for additional in interface['ipv4']['additional']:
add = {
"type": "static",
"control": "auto",
"address": additional['address'],
"netmask": additional['netmask']
}
if "routes" in additional:
add['routes'] = additional['routes']
netcfg['subnets'].append(add)
# Check for additional IPv6's
additional_count = len(interface['ipv6']['additional'])
if "ipv6" in interface and additional_count > 0:
for additional in interface['ipv6']['additional']:
add = {
"type": "static6",
"control": "auto",
"address": additional['address'],
"netmask": additional['netmask']
}
if "routes" in additional:
add['routes'] = additional['routes']
netcfg['subnets'].append(add)
# Add config to template
return netcfg
# Input Metadata and generate private network config part
def generate_private_network_interface(interface):
interface_name = get_interface_name(interface['mac'])
if not interface_name:
raise RuntimeError(
"Interface: %s could not be found on the system" %
interface['mac'])
netcfg = {
"name": interface_name,
"type": "physical",
"mac_address": interface['mac'],
"subnets": [
{
"type": "static",
"control": "auto",
"address": interface['ipv4']['address'],
"netmask": interface['ipv4']['netmask']
}
]
}
# Options that may or may not be used
if "mtu" in interface:
netcfg['mtu'] = interface['mtu']
if "accept-ra" in interface:
netcfg['accept-ra'] = interface['accept-ra']
if "routes" in interface:
netcfg['subnets'][0]['routes'] = interface['routes']
return netcfg
# Make required adjustments to the network configs provided
def add_interface_names(interfaces):
for interface in interfaces:
interface_name = get_interface_name(interface['mac'])
if not interface_name:
raise RuntimeError(
"Interface: %s could not be found on the system" %
interface['mac'])
interface['name'] = interface_name
return interfaces
# vi: ts=4 expandtab
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