* Mon Nov 18 2024 Miroslav Rezanina <mrezanin@redhat.com> - 23.4-22
- ci-Prevent-NM-from-handling-DNS-when-network-interfaces.patch [RHEL-65768] - Resolves: RHEL-65768 ([RHEL-9] Prevent NM from handling DNS when network interfaces have DNS config)
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Miroslav Rezanina
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commit
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248
ci-Prevent-NM-from-handling-DNS-when-network-interfaces.patch
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248
ci-Prevent-NM-from-handling-DNS-when-network-interfaces.patch
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From 59196e4b797d3e6a34e833d0516dfa0cf6afa3ee Mon Sep 17 00:00:00 2001
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From: Ani Sinha <anisinha@redhat.com>
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Date: Tue, 5 Nov 2024 04:07:36 +0530
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Subject: [PATCH] Prevent NM from handling DNS when network interfaces have DNS
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config (#5846)
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RH-Author: Ani Sinha <anisinha@redhat.com>
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RH-MergeRequest: 116: Prevent NM from handling DNS when network interfaces have DNS config (#5846)
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RH-Jira: RHEL-65768
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RH-Acked-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [1/1] 247ac2b34d3858a03507d29399f3414a4f4db263 (anisinha/cloud-init)
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In the change under PR #5401, we use global DNS configuration as well as
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DNS and search domain information from interface config and use it to populate
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/etc/resolv.conf. Therefore, if either or both global DNS/search domain config
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is present along with per-interface DNS/search domain information, we should add
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a network manager configuration to prevent network manager from manipulating
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/etc/resolv.conf.
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This is in addition to what we already do when only global DNS data is
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configured.
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Fixes bug added in 1b8030e0 .
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Signed-off-by: Ani Sinha <anisinha@redhat.com>
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(cherry picked from commit 2df49b652471999434f06d9d83ed9db8b4055895)
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---
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cloudinit/net/sysconfig.py | 28 +++++--
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tests/unittests/test_net.py | 158 ++++++++++++++++++++++++++++++++++++
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2 files changed, 181 insertions(+), 5 deletions(-)
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diff --git a/cloudinit/net/sysconfig.py b/cloudinit/net/sysconfig.py
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index e4a65187..4898a2fd 100644
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--- a/cloudinit/net/sysconfig.py
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+++ b/cloudinit/net/sysconfig.py
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@@ -905,17 +905,35 @@ class Renderer(renderer.Renderer):
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@staticmethod
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def _render_networkmanager_conf(network_state, templates=None):
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+ iface_dns = False
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content = networkmanager_conf.NetworkManagerConf("")
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-
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- # If DNS server information is provided, configure
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- # NetworkManager to not manage dns, so that /etc/resolv.conf
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- # does not get clobbered.
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+ # check if there is interface specific DNS information configured
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+ for iface in network_state.iter_interfaces():
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+ for subnet in iface["subnets"]:
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+ if "dns_nameservers" in subnet or "dns_search" in subnet:
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+ iface_dns = True
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+ break
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+ if (
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+ not iface_dns
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+ and "dns" in iface
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+ and (iface["dns"]["nameservers"] or iface["dns"]["search"])
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+ ):
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+ iface_dns = True
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+ break
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+
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+ # If DNS server and/or dns search information is provided either
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+ # globally or per interface basis, configure NetworkManager to
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+ # not manage dns, so that /etc/resolv.conf does not get clobbered.
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# This is not required for NetworkManager renderer as it
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# does not write /etc/resolv.conf directly. DNS information is
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# written to the interface keyfile and NetworkManager is then
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# responsible for using the DNS information from the keyfile,
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# including managing /etc/resolv.conf.
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- if network_state.dns_nameservers:
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+ if (
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+ network_state.dns_nameservers
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+ or network_state.dns_searchdomains
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+ or iface_dns
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+ ):
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content.set_section_keypair("main", "dns", "none")
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if len(content) == 0:
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diff --git a/tests/unittests/test_net.py b/tests/unittests/test_net.py
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index ddb45dc6..47b36d05 100644
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--- a/tests/unittests/test_net.py
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+++ b/tests/unittests/test_net.py
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@@ -967,6 +967,164 @@ dns = none
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),
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],
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},
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+ {
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+ "in_data": {
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+ "networks": [
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+ {
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+ "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
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+ "type": "ipv4",
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+ "netmask": "255.255.252.0",
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+ "link": "eth0",
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+ "routes": [
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+ {
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+ "netmask": "0.0.0.0",
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+ "network": "0.0.0.0",
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+ "gateway": "172.19.3.254",
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+ }
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+ ],
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+ "ip_address": "172.19.1.34",
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+ "dns_search": ["example3.com"],
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+ "dns_nameservers": ["172.19.0.12"],
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+ "id": "network0",
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+ }
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+ ],
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+ "links": [
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+ {
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+ "ethernet_mac_address": "fa:16:3e:ed:9a:59",
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+ "mtu": None,
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+ "type": "physical",
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+ "id": "eth0",
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+ },
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+ ],
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+ },
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+ "in_macs": {
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+ "fa:16:3e:ed:9a:59": "eth0",
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+ },
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+ "out_sysconfig_opensuse": [
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+ (
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+ "etc/sysconfig/network/ifcfg-eth0",
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+ """
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+# Created by cloud-init automatically, do not edit.
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+#
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+BOOTPROTO=static
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+IPADDR=172.19.1.34
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+LLADDR=fa:16:3e:ed:9a:59
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+NETMASK=255.255.252.0
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+STARTMODE=auto
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+""".lstrip(),
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+ ),
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+ (
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+ "etc/resolv.conf",
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+ """
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+; Created by cloud-init automatically, do not edit.
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+;
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+nameserver 172.19.0.12
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+search example3.com
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+""".lstrip(),
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+ ),
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+ (
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+ "etc/NetworkManager/conf.d/99-cloud-init.conf",
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+ """
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+# Created by cloud-init automatically, do not edit.
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+#
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+[main]
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+dns = none
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+""".lstrip(),
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+ ),
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+ (
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+ "etc/udev/rules.d/85-persistent-net-cloud-init.rules",
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+ "".join(
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+ [
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+ 'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
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+ 'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n',
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+ ]
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+ ),
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+ ),
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+ ],
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+ "out_sysconfig_rhel": [
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+ (
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+ "etc/sysconfig/network-scripts/ifcfg-eth0",
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+ """
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+# Created by cloud-init automatically, do not edit.
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+#
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+AUTOCONNECT_PRIORITY=120
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+BOOTPROTO=none
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+DEFROUTE=yes
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+DEVICE=eth0
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+DNS1=172.19.0.12
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+DOMAIN=example3.com
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+GATEWAY=172.19.3.254
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+HWADDR=fa:16:3e:ed:9a:59
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+IPADDR=172.19.1.34
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+NETMASK=255.255.252.0
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+ONBOOT=yes
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+TYPE=Ethernet
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+USERCTL=no
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+""".lstrip(),
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+ ),
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+ (
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+ "etc/resolv.conf",
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+ """
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+; Created by cloud-init automatically, do not edit.
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+;
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+nameserver 172.19.0.12
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+search example3.com
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+""".lstrip(),
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+ ),
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+ (
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+ "etc/NetworkManager/conf.d/99-cloud-init.conf",
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+ """
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+# Created by cloud-init automatically, do not edit.
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+#
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+[main]
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+dns = none
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+""".lstrip(),
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+ ),
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+ (
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+ "etc/udev/rules.d/70-persistent-net.rules",
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+ "".join(
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+ [
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+ 'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
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+ 'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n',
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+ ]
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+ ),
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+ ),
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+ ],
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+ "expected_network_manager": [
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+ (
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+ "".join(
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+ [
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+ "etc/NetworkManager/system-connections",
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+ "/cloud-init-eth0.nmconnection",
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+ ]
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+ ),
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+ """
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+# Generated by cloud-init. Changes will be lost.
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+
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+[connection]
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+id=cloud-init eth0
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+uuid=1dd9a779-d327-56e1-8454-c65e2556c12c
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+autoconnect-priority=120
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+type=ethernet
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+
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+[user]
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+org.freedesktop.NetworkManager.origin=cloud-init
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+
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+[ethernet]
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+mac-address=FA:16:3E:ED:9A:59
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+
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+[ipv4]
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+method=manual
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+may-fail=false
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+address1=172.19.1.34/22
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+route1=0.0.0.0/0,172.19.3.254
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+dns=172.19.0.12;
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+dns-search=example3.com;
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+
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+""".lstrip(),
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+ ),
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+ ],
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+ },
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{
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"in_data": {
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"services": [{"type": "dns", "address": "172.19.0.12"}],
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--
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2.39.3
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@ -1,6 +1,6 @@
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Name: cloud-init
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Name: cloud-init
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Version: 23.4
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Version: 23.4
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Release: 21%{?dist}
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Release: 22%{?dist}
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Summary: Cloud instance init scripts
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Summary: Cloud instance init scripts
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License: ASL 2.0 or GPLv3
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License: ASL 2.0 or GPLv3
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URL: http://launchpad.net/cloud-init
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URL: http://launchpad.net/cloud-init
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@ -75,6 +75,8 @@ Patch36: ci-fix-python3.13-Fix-import-error-for-passlib-on-Pytho.patch
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Patch37: ci-fix-Render-bridges-correctly-for-v2-on-sysconfig-wit.patch
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Patch37: ci-fix-Render-bridges-correctly-for-v2-on-sysconfig-wit.patch
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# For RHEL-38927 - NoCloud - network_config bridges incorrectly configured
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# For RHEL-38927 - NoCloud - network_config bridges incorrectly configured
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Patch38: ci-fix-Render-v2-bridges-correctly-on-network-manager-w.patch
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Patch38: ci-fix-Render-v2-bridges-correctly-on-network-manager-w.patch
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# For RHEL-65768 - [RHEL-9] Prevent NM from handling DNS when network interfaces have DNS config
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Patch39: ci-Prevent-NM-from-handling-DNS-when-network-interfaces.patch
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BuildArch: noarch
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BuildArch: noarch
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@ -289,6 +291,11 @@ fi
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%config(noreplace) %{_sysconfdir}/rsyslog.d/21-cloudinit.conf
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%config(noreplace) %{_sysconfdir}/rsyslog.d/21-cloudinit.conf
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%changelog
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%changelog
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* Mon Nov 18 2024 Miroslav Rezanina <mrezanin@redhat.com> - 23.4-22
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- ci-Prevent-NM-from-handling-DNS-when-network-interfaces.patch [RHEL-65768]
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- Resolves: RHEL-65768
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([RHEL-9] Prevent NM from handling DNS when network interfaces have DNS config)
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* Wed Nov 06 2024 Miroslav Rezanina <mrezanin@redhat.com> - 23.4-21
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* Wed Nov 06 2024 Miroslav Rezanina <mrezanin@redhat.com> - 23.4-21
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- ci-fix-Render-bridges-correctly-for-v2-on-sysconfig-wit.patch [RHEL-38927]
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- ci-fix-Render-bridges-correctly-for-v2-on-sysconfig-wit.patch [RHEL-38927]
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- ci-fix-Render-v2-bridges-correctly-on-network-manager-w.patch [RHEL-38927]
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- ci-fix-Render-v2-bridges-correctly-on-network-manager-w.patch [RHEL-38927]
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Reference in New Issue
Block a user