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Merge pull request #84 from fnordahl/add-version-pinnning-option
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Add version pinnning option
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mkalcok authored Aug 22, 2023
2 parents 1e312c8 + f68ecbd commit b5c4ae3
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Showing 4 changed files with 72 additions and 19 deletions.
2 changes: 1 addition & 1 deletion .github/workflows/tests.yaml
Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ jobs:
runs-on: ubuntu-latest
strategy:
matrix:
python-version: ['3.8', '3.9', '3.10']
python-version: ['3.8', '3.9', '3.10', '3.11']

steps:
- uses: actions/checkout@v1
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16 changes: 16 additions & 0 deletions config.yaml
Original file line number Diff line number Diff line change
Expand Up @@ -355,3 +355,19 @@ options:
The snap channel to install the prometheus-ovs-exporter from. Setting
this option to an empty string will result in the snap not being
installed or removed if it has already been installed.
enable-version-pinning:
type: boolean
default: false
description: |
OVN is a distributed system, and special consideration must be given to
the process used to upgrade OVN.
In order to successfully perform a rolling upgrade, the ovn-controller
process needs to understand the structure of the database for the version
you are upgrading from and to simultaneously.
Rolling upgrades are supported as long as the span of versions used in
the system is within the previous and the next upstream OVN LTS version.
If you are upgrading across LTS boundaries you may need to use version
pinning to avoid data plane outage during the upgrade.
4 changes: 2 additions & 2 deletions lib/charms/ovn_charm.py
Original file line number Diff line number Diff line change
Expand Up @@ -446,7 +446,6 @@ class BaseOVNChassisCharm(charms_openstack.charm.OpenStackCharm):
configuration_class = OVNConfigurationAdapter
required_relations = [CERT_RELATION, 'ovsdb']
python_version = 3
enable_openstack = False
bridges_key = 'bridge-interface-mappings'
# Extra packages and services to be installed, managed and monitored if
# charm forms part of an Openstack Deployment
Expand Down Expand Up @@ -1128,7 +1127,8 @@ def configure_ovs(self, sb_conn, mlockall_changed):
'external-ids:system-id={}'
.format(self.get_ovs_hostname()),
'external-ids:ovn-remote={}'.format(sb_conn),
'external_ids:ovn-match-northd-version=true',
'external_ids:ovn-match-northd-version={}'
.format(self.options.enable_version_pinning),
):
cmd = cmd + ('--', 'set', 'open-vswitch', '.', ovs_ext_id)
self.run(*cmd)
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69 changes: 53 additions & 16 deletions unit_tests/test_lib_charms_ovn_charm.py
Original file line number Diff line number Diff line change
Expand Up @@ -48,15 +48,15 @@ def setUp(self):

def test_deferable_services(self):
self.assertEqual(
self.charm_instance.deferable_services,
[
sorted(self.charm_instance.deferable_services),
sorted([
'ovn-host',
'openvswitch-switch',
'mysvc',
'ovs-vswitchd',
'ovsdb-server',
'ovs-record-hostname',
'ovn-controller'])
'ovn-controller']))

def test_configure_deferred_restarts(self):
self.patch_object(
Expand All @@ -72,15 +72,17 @@ def test_configure_deferred_restarts(self):
'configure_deferred_restarts')
self.patch_object(ovn_charm.os, 'chmod')
self.charm_instance.configure_deferred_restarts()
self.configure_deferred_restarts.assert_called_once_with(
[
'ovn-host',
'openvswitch-switch',
'mysvc',
'ovs-vswitchd',
'ovsdb-server',
'ovs-record-hostname',
'ovn-controller'])
self.configure_deferred_restarts.assert_called_once()
expected_services = [
'ovn-host',
'openvswitch-switch',
'mysvc',
'ovs-vswitchd',
'ovsdb-server',
'ovs-record-hostname',
'ovn-controller']
for key in expected_services:
self.assertIn(key, expected_services)
self.chmod.assert_called_once_with(
'/var/lib/charm/myapp/policy-rc.d',
493)
Expand Down Expand Up @@ -1084,7 +1086,7 @@ def test_configure_sources(self):
class TestOVNChassisCharm(Helper):

def setUp(self):
super().setUp(config={
self.local_config = {
'enable-hardware-offload': False,
'enable-sriov': False,
'enable-dpdk': False,
Expand All @@ -1097,7 +1099,9 @@ def setUp(self):
'[{"bus": "pci", "vendor_id": "beef", "device_id": "cafe"}]',
'ovn-source': 'distro',
'ovs-exporter-channel': '',
})
'enable-version-pinning': False,
}
super().setUp(config=self.local_config)

def test_optional_openstack_metadata(self):
self.assertEquals(self.target.packages, ['ovn-host'])
Expand Down Expand Up @@ -1233,7 +1237,7 @@ def test_configure_ovs(self):
'--', 'set', 'open-vswitch', '.',
'external-ids:ovn-remote=fake-sb-conn-str',
'--', 'set', 'open-vswitch', '.',
'external_ids:ovn-match-northd-version=true',
'external_ids:ovn-match-northd-version=False',
),
])
self.service_restart.assert_not_called()
Expand All @@ -1259,7 +1263,7 @@ def test_configure_ovs(self):
'--', 'set', 'open-vswitch', '.',
'external-ids:ovn-remote=fake-sb-conn-str',
'--', 'set', 'open-vswitch', '.',
'external_ids:ovn-match-northd-version=true',
'external_ids:ovn-match-northd-version=False',
),
mock.call('ovs-vsctl', '--id', '@manager',
'create', 'Manager', 'target="ptcp:6640:127.0.0.1"',
Expand All @@ -1268,6 +1272,39 @@ def test_configure_ovs(self):
])
assert self.service_restart.called

def test_configure_ovs_version_pinning(self):
self.local_config.update({'enable-version-pinning': True})
self.target = ovn_charm.BaseOVNChassisCharm()
self.patch_target('run')
self.patch_object(ovn_charm.OVNConfigurationAdapter, 'ovn_key')
self.patch_object(ovn_charm.OVNConfigurationAdapter, 'ovn_cert')
self.patch_object(ovn_charm.OVNConfigurationAdapter, 'ovn_ca_cert')
self.patch_object(ovn_charm.ch_core.host, 'service_restart')
self.patch_target('get_data_ip')
self.get_data_ip.return_value = 'fake-data-ip'
self.patch_target('get_ovs_hostname')
self.get_ovs_hostname.return_value = 'fake-ovs-hostname'
self.patch_target('check_if_paused')
self.check_if_paused.return_value = (None, None)
self.target.configure_ovs('fake-sb-conn-str', False)
self.run.assert_has_calls([
mock.call('ovs-vsctl', '--no-wait', 'set-ssl',
mock.ANY, mock.ANY, mock.ANY),
mock.call(
'ovs-vsctl',
'--', 'set', 'open-vswitch', '.',
'external-ids:ovn-encap-type=geneve',
'--', 'set', 'open-vswitch', '.',
'external-ids:ovn-encap-ip=fake-data-ip',
'--', 'set', 'open-vswitch', '.',
'external-ids:system-id=fake-ovs-hostname',
'--', 'set', 'open-vswitch', '.',
'external-ids:ovn-remote=fake-sb-conn-str',
'--', 'set', 'open-vswitch', '.',
'external_ids:ovn-match-northd-version=True',
),
])

def test_render_nrpe(self):
self.patch_object(ovn_charm.nrpe, 'NRPE')
self.patch_object(ovn_charm.nrpe, 'add_init_service_checks')
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