1 files changed, 95 insertions, 0 deletions
diff --git a/tests/integration_tests/modules/test_user_events.py b/tests/integration_tests/modules/test_user_events.py
new file mode 100644
index 00000000..a45cad72
--- /dev/null
+++ b/tests/integration_tests/modules/test_user_events.py
@@ -0,0 +1,95 @@
+"""Test user-overridable events.
+
+This is currently limited to applying network config on BOOT events.
+"""
+
+import pytest
+import re
+import yaml
+
+from tests.integration_tests.instances import IntegrationInstance
+
+
+def _add_dummy_bridge_to_netplan(client: IntegrationInstance):
+    # Update netplan configuration to ensure it doesn't change on reboot
+    netplan = yaml.safe_load(
+        client.execute('cat /etc/netplan/50-cloud-init.yaml')
+    )
+    # Just a dummy bridge to do nothing
+    try:
+        netplan['network']['bridges']['dummy0'] = {'dhcp4': False}
+    except KeyError:
+        netplan['network']['bridges'] = {'dummy0': {'dhcp4': False}}
+
+    dumped_netplan = yaml.dump(netplan)
+    client.write_to_file('/etc/netplan/50-cloud-init.yaml', dumped_netplan)
+
+
+@pytest.mark.lxd_container
+@pytest.mark.lxd_vm
+@pytest.mark.ec2
+@pytest.mark.gce
+@pytest.mark.oci
+@pytest.mark.openstack
+@pytest.mark.not_xenial
+def test_boot_event_disabled_by_default(client: IntegrationInstance):
+    log = client.read_from_file('/var/log/cloud-init.log')
+    assert 'Applying network configuration' in log
+    assert 'dummy0' not in client.execute('ls /sys/class/net')
+
+    _add_dummy_bridge_to_netplan(client)
+    client.execute('rm /var/log/cloud-init.log')
+
+    client.restart()
+    log2 = client.read_from_file('/var/log/cloud-init.log')
+
+    # We attempt to apply network config twice on every boot.
+    # Ensure neither time works.
+    assert 2 == len(
+        re.findall(r"Event Denied: scopes=\['network'\] EventType=boot[^-]",
+                   log2)
+    )
+    assert 2 == log2.count(
+        "Event Denied: scopes=['network'] EventType=boot-legacy"
+    )
+    assert 2 == log2.count(
+        "No network config applied. Neither a new instance"
+        " nor datasource network update allowed"
+    )
+
+    assert 'dummy0' in client.execute('ls /sys/class/net')
+
+
+def _test_network_config_applied_on_reboot(client: IntegrationInstance):
+    log = client.read_from_file('/var/log/cloud-init.log')
+    assert 'Applying network configuration' in log
+    assert 'dummy0' not in client.execute('ls /sys/class/net')
+
+    _add_dummy_bridge_to_netplan(client)
+    client.execute('rm /var/log/cloud-init.log')
+    client.restart()
+    log = client.read_from_file('/var/log/cloud-init.log')
+
+    assert 'Event Allowed: scope=network EventType=boot' in log
+    assert 'Applying network configuration' in log
+    assert 'dummy0' not in client.execute('ls /sys/class/net')
+
+
+@pytest.mark.azure
+@pytest.mark.not_xenial
+def test_boot_event_enabled_by_default(client: IntegrationInstance):
+    _test_network_config_applied_on_reboot(client)
+
+
+USER_DATA = """\
+#cloud-config
+updates:
+  network:
+    when: [boot]
+"""
+
+
+@pytest.mark.not_xenial
+@pytest.mark.user_data(USER_DATA)
+def test_boot_event_enabled(client: IntegrationInstance):
+    _test_network_config_applied_on_reboot(client)