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From bec5fb60ffae3d1137c7261e5571c2751c5dda25 Mon Sep 17 00:00:00 2001
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From: James Falcon <TheRealFalcon@users.noreply.github.com>
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Date: Mon, 8 Mar 2021 14:09:47 -0600
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Subject: Fix requiring device-number on EC2 derivatives (#836)
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#342 (70dbccbb) introduced the ability to determine route-metrics based on
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the `device-number` provided by the EC2 IMDS. Not all datasources that
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subclass EC2 will have this attribute, so allow the old behavior if
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`device-number` is not present.
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LP: #1917875
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---
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cloudinit/sources/DataSourceEc2.py | 3 +-
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.../unittests/test_datasource/test_aliyun.py | 30 +++++++++++++++++++
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2 files changed, 32 insertions(+), 1 deletion(-)
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diff --git a/cloudinit/sources/DataSourceEc2.py b/cloudinit/sources/DataSourceEc2.py
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index 1930a509..a2105dc7 100644
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--- a/cloudinit/sources/DataSourceEc2.py
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+++ b/cloudinit/sources/DataSourceEc2.py
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@@ -765,13 +765,14 @@ def convert_ec2_metadata_network_config(
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netcfg['ethernets'][nic_name] = dev_config
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return netcfg
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# Apply network config for all nics and any secondary IPv4/v6 addresses
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+ nic_idx = 0
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for mac, nic_name in sorted(macs_to_nics.items()):
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nic_metadata = macs_metadata.get(mac)
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if not nic_metadata:
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continue # Not a physical nic represented in metadata
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# device-number is zero-indexed, we want it 1-indexed for the
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# multiplication on the following line
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- nic_idx = int(nic_metadata['device-number']) + 1
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+ nic_idx = int(nic_metadata.get('device-number', nic_idx)) + 1
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dhcp_override = {'route-metric': nic_idx * 100}
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dev_config = {'dhcp4': True, 'dhcp4-overrides': dhcp_override,
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'dhcp6': False,
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diff --git a/tests/unittests/test_datasource/test_aliyun.py b/tests/unittests/test_datasource/test_aliyun.py
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index eb2828d5..cab1ac2b 100644
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--- a/tests/unittests/test_datasource/test_aliyun.py
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+++ b/tests/unittests/test_datasource/test_aliyun.py
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@@ -7,6 +7,7 @@ from unittest import mock
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from cloudinit import helpers
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from cloudinit.sources import DataSourceAliYun as ay
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+from cloudinit.sources.DataSourceEc2 import convert_ec2_metadata_network_config
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from cloudinit.tests import helpers as test_helpers
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DEFAULT_METADATA = {
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@@ -183,6 +184,35 @@ class TestAliYunDatasource(test_helpers.HttprettyTestCase):
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self.assertEqual(ay.parse_public_keys(public_keys),
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public_keys['key-pair-0']['openssh-key'])
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+ def test_route_metric_calculated_without_device_number(self):
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+ """Test that route-metric code works without `device-number`
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+
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+ `device-number` is part of EC2 metadata, but not supported on aliyun.
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+ Attempting to access it will raise a KeyError.
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+
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+ LP: #1917875
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+ """
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+ netcfg = convert_ec2_metadata_network_config(
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+ {"interfaces": {"macs": {
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+ "06:17:04:d7:26:09": {
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+ "interface-id": "eni-e44ef49e",
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+ },
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+ "06:17:04:d7:26:08": {
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+ "interface-id": "eni-e44ef49f",
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+ }
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+ }}},
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+ macs_to_nics={
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+ '06:17:04:d7:26:09': 'eth0',
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+ '06:17:04:d7:26:08': 'eth1',
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+ }
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+ )
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+
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+ met0 = netcfg['ethernets']['eth0']['dhcp4-overrides']['route-metric']
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+ met1 = netcfg['ethernets']['eth1']['dhcp4-overrides']['route-metric']
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+
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+ # route-metric numbers should be 100 apart
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+ assert 100 == abs(met0 - met1)
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+
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class TestIsAliYun(test_helpers.CiTestCase):
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ALIYUN_PRODUCT = 'Alibaba Cloud ECS'
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--
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2.27.0
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