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From aaf1d063f198ce09f0d539a85e1a1a2bb834520b Mon Sep 17 00:00:00 2001
From: James Falcon <james.falcon@canonical.com>
Date: Tue, 2 Jan 2024 11:29:17 -0600
Subject: [PATCH 1/3] fix: Correct v2 NetworkManager route rendering (#4637)
RH-Author: Cathy Avery <cavery@redhat.com>
RH-MergeRequest: 72: Fixes for cloud-init fails to configure DNS/search domains for network-config v1
RH-Jira: RHEL-20964
RH-Acked-by: Ani Sinha <anisinha@redhat.com>
RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
RH-Commit: [1/2] fb865987dbcf506a674eb9798f9c06859539a696 (cavery/cloud-init-c-9-s)
fix: Correct v2 NetworkManager route rendering
Because network v2 route defintions can have mixed v4 and v6 routes, we
need to determine the IP family per route rather than per subnet.
Similar, ensure dns-search is rendered correctly.
Fixes GH-4518
(cherry picked from commit c2c100e8c9fd8709539b3ab2b0ee34c66ba3f2f7)
Signed-off-by: Cathy Avery <cavery@redhat.com>
---
cloudinit/net/__init__.py | 2 +
cloudinit/net/network_manager.py | 87 +++++++++-------
tests/unittests/test_net.py | 165 ++++++++++++++++++++++++++++++-
3 files changed, 219 insertions(+), 35 deletions(-)
diff --git a/cloudinit/net/__init__.py b/cloudinit/net/__init__.py
index c0888f52..65e7ff33 100644
--- a/cloudinit/net/__init__.py
+++ b/cloudinit/net/__init__.py
@@ -1287,6 +1287,8 @@ def subnet_is_ipv6(subnet) -> bool:
"""Common helper for checking network_state subnets for ipv6."""
# 'static6', 'dhcp6', 'ipv6_dhcpv6-stateful', 'ipv6_dhcpv6-stateless' or
# 'ipv6_slaac'
+ # This function is inappropriate for v2-based routes as routes defined
+ # under v2 subnets can contain ipv4 and ipv6 simultaneously
if subnet["type"].endswith("6") or subnet["type"] in IPV6_DYNAMIC_TYPES:
# This is a request either static6 type or DHCPv6.
return True
diff --git a/cloudinit/net/network_manager.py b/cloudinit/net/network_manager.py
index 76a0ac15..bd6e6d75 100644
--- a/cloudinit/net/network_manager.py
+++ b/cloudinit/net/network_manager.py
@@ -12,10 +12,15 @@ import itertools
import logging
import os
import uuid
-from typing import Optional
+from typing import List, Optional
from cloudinit import subp, util
-from cloudinit.net import is_ipv6_address, renderer, subnet_is_ipv6
+from cloudinit.net import (
+ is_ipv6_address,
+ is_ipv6_network,
+ renderer,
+ subnet_is_ipv6,
+)
from cloudinit.net.network_state import NetworkState
from cloudinit.net.sysconfig import available_nm_ifcfg_rh
@@ -158,11 +163,11 @@ class NMConnection:
if self.config[family]["method"] == "auto" and method == "manual":
return
- if (
- subnet_type == "ipv6_dhcpv6-stateful"
- or subnet_type == "ipv6_dhcpv6-stateless"
- or subnet_type == "ipv6_slaac"
- ):
+ if subnet_type in [
+ "ipv6_dhcpv6-stateful",
+ "ipv6_dhcpv6-stateless",
+ "ipv6_slaac",
+ ]:
# set ipv4 method to 'disabled' to align with sysconfig renderer.
self._set_default("ipv4", "method", "disabled")
@@ -174,7 +179,8 @@ class NMConnection:
Adds a numbered property, such as address<n> or route<n>, ensuring
the appropriate value gets used for <n>.
"""
-
+ if not self.config.has_section(section):
+ self.config[section] = {}
for index in itertools.count(1):
key = f"{key_prefix}{index}"
if not self.config.has_option(section, key):
@@ -189,40 +195,37 @@ class NMConnection:
value = subnet["address"] + "/" + str(subnet["prefix"])
self._add_numbered(family, "address", value)
- def _add_route(self, family, route):
- """
- Adds a ipv[46].route<n> property.
- """
-
+ def _add_route(self, route):
+ """Adds a ipv[46].route<n> property."""
+ # Because network v2 route definitions can have mixed v4 and v6
+ # routes, determine the family per route based on the gateway
+ family = "ipv6" if is_ipv6_network(route["gateway"]) else "ipv4"
value = route["network"] + "/" + str(route["prefix"])
if "gateway" in route:
value = value + "," + route["gateway"]
self._add_numbered(family, "route", value)
- def _add_nameserver(self, dns):
+ def _add_nameserver(self, dns: str) -> None:
"""
Extends the ipv[46].dns property with a name server.
"""
-
- # FIXME: the subnet contains IPv4 and IPv6 name server mixed
- # together. We might be getting an IPv6 name server while
- # we're dealing with an IPv4 subnet. Sort this out by figuring
- # out the correct family and making sure a valid section exist.
family = "ipv6" if is_ipv6_address(dns) else "ipv4"
- self._set_default(family, "method", "disabled")
-
- self._set_default(family, "dns", "")
- self.config[family]["dns"] = self.config[family]["dns"] + dns + ";"
+ if self.config.has_section(family):
+ self._set_default(family, "dns", "")
+ self.config[family]["dns"] = self.config[family]["dns"] + dns + ";"
- def _add_dns_search(self, family, dns_search):
+ def _add_dns_search(self, dns_search: List[str]) -> None:
"""
Extends the ipv[46].dns-search property with a name server.
"""
-
- self._set_default(family, "dns-search", "")
- self.config[family]["dns-search"] = (
- self.config[family]["dns-search"] + ";".join(dns_search) + ";"
- )
+ for family in ["ipv4", "ipv6"]:
+ if self.config.has_section(family):
+ self._set_default(family, "dns-search", "")
+ self.config[family]["dns-search"] = (
+ self.config[family]["dns-search"]
+ + ";".join(dns_search)
+ + ";"
+ )
def con_uuid(self):
"""
@@ -304,8 +307,11 @@ class NMConnection:
device_mtu = iface["mtu"]
ipv4_mtu = None
+ found_nameservers = []
+ found_dns_search = []
# Deal with Layer 3 configuration
+ use_top_level_dns = "dns" in iface
for subnet in iface["subnets"]:
family = "ipv6" if subnet_is_ipv6(subnet) else "ipv4"
@@ -315,15 +321,28 @@ class NMConnection:
if "gateway" in subnet:
self.config[family]["gateway"] = subnet["gateway"]
for route in subnet["routes"]:
- self._add_route(family, route)
- if "dns_nameservers" in subnet:
+ self._add_route(route)
+ if not use_top_level_dns and "dns_nameservers" in subnet:
for nameserver in subnet["dns_nameservers"]:
- self._add_nameserver(nameserver)
- if "dns_search" in subnet:
- self._add_dns_search(family, subnet["dns_search"])
+ found_nameservers.append(nameserver)
+ if not use_top_level_dns and "dns_search" in subnet:
+ found_dns_search.append(subnet["dns_search"])
if family == "ipv4" and "mtu" in subnet:
ipv4_mtu = subnet["mtu"]
+ # Now add our DNS search domains. We add them later because we
+ # only want them if an IP family has already been defined
+ if use_top_level_dns:
+ for nameserver in iface["dns"]["nameservers"]:
+ self._add_nameserver(nameserver)
+ if iface["dns"]["search"]:
+ self._add_dns_search(iface["dns"]["search"])
+ else:
+ for nameserver in found_nameservers:
+ self._add_nameserver(nameserver)
+ for dns_search in found_dns_search:
+ self._add_dns_search(dns_search)
+
# we do not want to set may-fail to false for both ipv4 and ipv6 dhcp
# at the at the same time. This will make the network configuration
# work only when both ipv4 and ipv6 dhcp succeeds. This may not be
diff --git a/tests/unittests/test_net.py b/tests/unittests/test_net.py
index d9ef493b..2a99f150 100644
--- a/tests/unittests/test_net.py
+++ b/tests/unittests/test_net.py
@@ -2962,9 +2962,9 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
may-fail=false
address1=192.168.0.2/24
gateway=192.168.0.1
+ address2=192.168.2.10/24
dns=192.168.0.10;10.23.23.134;
dns-search=barley.maas;sacchromyces.maas;brettanomyces.maas;
- address2=192.168.2.10/24
"""
),
@@ -4154,6 +4154,148 @@ iface bond0 inet6 static
"""
),
},
+ "v2-mixed-routes": {
+ "expected_network_manager": {
+ "cloud-init-eth0.nmconnection": textwrap.dedent(
+ """\
+ # Generated by cloud-init. Changes will be lost.
+
+ [connection]
+ id=cloud-init eth0
+ uuid=1dd9a779-d327-56e1-8454-c65e2556c12c
+ autoconnect-priority=120
+ type=ethernet
+ interface-name=eth0
+
+ [user]
+ org.freedesktop.NetworkManager.origin=cloud-init
+
+ [ethernet]
+
+ [ipv4]
+ method=auto
+ may-fail=true
+ route1=169.254.42.42/32,62.210.0.1
+ route2=169.254.42.43/32,62.210.0.2
+ address1=192.168.1.20/16
+ dns=8.8.8.8;
+ dns-search=lab;home;
+
+ [ipv6]
+ route1=::/0,fe80::dc00:ff:fe20:186
+ route2=fe80::dc00:ff:fe20:188/64,fe80::dc00:ff:fe20:187
+ method=auto
+ may-fail=true
+ address1=2001:bc8:1210:232:dc00:ff:fe20:185/64
+ dns=FEDC::1;
+ dns-search=lab;home;
+
+ """
+ )
+ },
+ "yaml": textwrap.dedent(
+ """\
+ version: 2
+ ethernets:
+ eth0:
+ dhcp4: true
+ dhcp6: true
+ nameservers:
+ search: [lab, home]
+ addresses: [8.8.8.8, "FEDC::1"]
+ routes:
+ - to: 169.254.42.42/32
+ via: 62.210.0.1
+ - via: fe80::dc00:ff:fe20:186
+ to: ::/0
+ - to: 169.254.42.43/32
+ via: 62.210.0.2
+ - via: fe80::dc00:ff:fe20:187
+ to: fe80::dc00:ff:fe20:188
+ addresses:
+ - 192.168.1.20/16
+ - 2001:bc8:1210:232:dc00:ff:fe20:185/64
+ """
+ ),
+ },
+ "v2-dns-no-if-ips": {
+ "expected_network_manager": {
+ "cloud-init-eth0.nmconnection": textwrap.dedent(
+ """\
+ # Generated by cloud-init. Changes will be lost.
+
+ [connection]
+ id=cloud-init eth0
+ uuid=1dd9a779-d327-56e1-8454-c65e2556c12c
+ autoconnect-priority=120
+ type=ethernet
+ interface-name=eth0
+
+ [user]
+ org.freedesktop.NetworkManager.origin=cloud-init
+
+ [ethernet]
+
+ [ipv4]
+ method=auto
+ may-fail=true
+ dns=8.8.8.8;
+ dns-search=lab;home;
+
+ [ipv6]
+ method=auto
+ may-fail=true
+ dns=FEDC::1;
+ dns-search=lab;home;
+
+ """
+ )
+ },
+ "yaml": textwrap.dedent(
+ """\
+ version: 2
+ ethernets:
+ eth0:
+ dhcp4: true
+ dhcp6: true
+ nameservers:
+ search: [lab, home]
+ addresses: [8.8.8.8, "FEDC::1"]
+ """
+ ),
+ },
+ "v2-dns-no-dhcp": {
+ "expected_network_manager": {
+ "cloud-init-eth0.nmconnection": textwrap.dedent(
+ """\
+ # Generated by cloud-init. Changes will be lost.
+
+ [connection]
+ id=cloud-init eth0
+ uuid=1dd9a779-d327-56e1-8454-c65e2556c12c
+ autoconnect-priority=120
+ type=ethernet
+ interface-name=eth0
+
+ [user]
+ org.freedesktop.NetworkManager.origin=cloud-init
+
+ [ethernet]
+
+ """
+ )
+ },
+ "yaml": textwrap.dedent(
+ """\
+ version: 2
+ ethernets:
+ eth0:
+ nameservers:
+ search: [lab, home]
+ addresses: [8.8.8.8, "FEDC::1"]
+ """
+ ),
+ },
}
@@ -6267,6 +6409,27 @@ class TestNetworkManagerRendering(CiTestCase):
entry[self.expected_name], self.expected_conf_d, found
)
+ def test_v2_mixed_routes(self):
+ entry = NETWORK_CONFIGS["v2-mixed-routes"]
+ found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
+ self._compare_files_to_expected(
+ entry[self.expected_name], self.expected_conf_d, found
+ )
+
+ def test_v2_dns_no_ips(self):
+ entry = NETWORK_CONFIGS["v2-dns-no-if-ips"]
+ found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
+ self._compare_files_to_expected(
+ entry[self.expected_name], self.expected_conf_d, found
+ )
+
+ def test_v2_dns_no_dhcp(self):
+ entry = NETWORK_CONFIGS["v2-dns-no-dhcp"]
+ found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
+ self._compare_files_to_expected(
+ entry[self.expected_name], self.expected_conf_d, found
+ )
+
@mock.patch(
"cloudinit.net.is_openvswitch_internal_interface",
--
2.39.3
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