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From ea83e72b335e652b080fda66a075c0d1322ed6dc Mon Sep 17 00:00:00 2001
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From: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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Date: Tue, 7 Dec 2021 10:00:41 +0100
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Subject: [PATCH] cloudinit/net: handle two different routes for the same ip
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(#1124)
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RH-Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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RH-MergeRequest: 39: cloudinit/net: handle two different routes for the same ip (#1124)
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RH-Commit: [1/1] 6810dc29ce786fbca96d2033386aa69c6ab65997
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RH-Bugzilla: 2028028
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RH-Acked-by: Mohamed Gamal Morsy <mmorsy@redhat.com>
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RH-Acked-by: Eduardo Otubo <otubo@redhat.com>
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commit 0e25076b34fa995161b83996e866c0974cee431f
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Author: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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Date: Mon Dec 6 18:34:26 2021 +0100
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cloudinit/net: handle two different routes for the same ip (#1124)
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If we set a dhcp server side like this:
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$ cat /var/tmp/cloud-init/cloud-init-dhcp-f0rie5tm/dhcp.leases
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lease {
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...
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option classless-static-routes 31.169.254.169.254 0.0.0.0,31.169.254.169.254
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10.112.143.127,22.10.112.140 0.0.0.0,0 10.112.140.1;
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...
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}
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cloud-init fails to configure the routes via 'ip route add' because to there are
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two different routes for 169.254.169.254:
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$ ip -4 route add 192.168.1.1/32 via 0.0.0.0 dev eth0
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$ ip -4 route add 192.168.1.1/32 via 10.112.140.248 dev eth0
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But NetworkManager can handle such scenario successfully as it uses "ip route append".
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So change cloud-init to also use "ip route append" to fix the issue:
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$ ip -4 route append 192.168.1.1/32 via 0.0.0.0 dev eth0
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$ ip -4 route append 192.168.1.1/32 via 10.112.140.248 dev eth0
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Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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RHBZ: #2003231
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Conflicts:
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cloudinit/net/tests/test_init.py: a mock call in
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test_ephemeral_ipv4_network_with_rfc3442_static_routes is not
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present downstream.
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Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
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---
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cloudinit/net/__init__.py | 2 +-
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cloudinit/net/tests/test_init.py | 4 ++--
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2 files changed, 3 insertions(+), 3 deletions(-)
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diff --git a/cloudinit/net/__init__.py b/cloudinit/net/__init__.py
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index 385b7bcc..003efa2a 100644
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--- a/cloudinit/net/__init__.py
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+++ b/cloudinit/net/__init__.py
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@@ -1138,7 +1138,7 @@ class EphemeralIPv4Network(object):
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if gateway != "0.0.0.0/0":
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via_arg = ['via', gateway]
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subp.subp(
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- ['ip', '-4', 'route', 'add', net_address] + via_arg +
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+ ['ip', '-4', 'route', 'append', net_address] + via_arg +
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['dev', self.interface], capture=True)
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self.cleanup_cmds.insert(
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0, ['ip', '-4', 'route', 'del', net_address] + via_arg +
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diff --git a/cloudinit/net/tests/test_init.py b/cloudinit/net/tests/test_init.py
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index 946f8ee2..2350837b 100644
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--- a/cloudinit/net/tests/test_init.py
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+++ b/cloudinit/net/tests/test_init.py
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@@ -719,10 +719,10 @@ class TestEphemeralIPV4Network(CiTestCase):
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['ip', '-family', 'inet', 'link', 'set', 'dev', 'eth0', 'up'],
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capture=True),
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mock.call(
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- ['ip', '-4', 'route', 'add', '169.254.169.254/32',
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+ ['ip', '-4', 'route', 'append', '169.254.169.254/32',
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'via', '192.168.2.1', 'dev', 'eth0'], capture=True),
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mock.call(
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- ['ip', '-4', 'route', 'add', '0.0.0.0/0',
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+ ['ip', '-4', 'route', 'append', '0.0.0.0/0',
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'via', '192.168.2.1', 'dev', 'eth0'], capture=True)]
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expected_teardown_calls = [
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mock.call(
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--
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2.27.0
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