openstack
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charm-neutron-openvswitch
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charm-neutron-openvswitch/hooks/neutron_ovs_hooks.py

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Python
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#!/usr/bin/env python3
#
# Copyright 2016 Canonical Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import sys
import uuid
from copy import deepcopy
from charmhelpers.contrib.openstack.utils import (
pausable_restart_on_change as restart_on_change,
series_upgrade_prepare,
series_upgrade_complete,
is_unit_paused_set,
CompareOpenStackReleases,
os_release,
)
from charmhelpers.core.hookenv import (
Hooks,
UnregisteredHookError,
config,
log,
relation_set,
relation_ids,
)
from charmhelpers.core.sysctl import create as create_sysctl
from charmhelpers.core.host import (
is_container,
)
from charmhelpers.core.unitdata import kv
from neutron_ovs_utils import (
DHCP_PACKAGES,
DVR_PACKAGES,
L3HA_PACKAGES,
METADATA_PACKAGES,
OVS_DEFAULT,
configure_ovs,
configure_sriov,
get_shared_secret,
register_configs,
restart_map,
use_dvr,
use_l3ha,
enable_nova_metadata,
enable_local_dhcp,
install_packages,
install_l3ha_packages,
purge_packages,
assess_status,
install_tmpfilesd,
pause_unit_helper,
resume_unit_helper,
determine_purge_packages,
install_sriov_systemd_files,
enable_sriov,
)
import neutron_ovs_context
hooks = Hooks()
CONFIGS = register_configs()
@hooks.hook('install.real')
def install():
install_packages()
# Start migration to agent registration with FQDNs for newly installed
# units with OpenStack release Stein or newer.
release = os_release('neutron-common')
if CompareOpenStackReleases(release) >= 'stein':
db = kv()
db.set('neutron-ovs-charm-use-fqdn', True)
db.flush()
# NOTE(wolsen): Do NOT add restart_on_change decorator without consideration
# for the implications of modifications to the /etc/default/openvswitch-switch.
@hooks.hook('upgrade-charm')
def upgrade_charm():
if OVS_DEFAULT in restart_map():
# In the 16.10 release of the charms, the code changed from managing
# the /etc/default/openvswitch-switch file only when dpdk was enabled
# to always managing this file. Thus, an upgrade of the charm from a
# release prior to 16.10 or higher will always cause the contents of
# the file to change and will trigger a restart of the
# openvswitch-switch service, which in turn causes a temporary
# network outage. To prevent this outage, determine if the
# /etc/default/openvswitch-switch file needs to be migrated and if
# so, migrate the file but do NOT restart the openvswitch-switch
# service.
# See bug LP #1712444
with open(OVS_DEFAULT, 'r') as f:
# The 'Service restart triggered ...' line was added to the
# OVS_DEFAULT template in the 16.10 version of the charm to allow
# restarts so we use this as the key to see if the file needs
# migrating.
if 'Service restart triggered' not in f.read():
CONFIGS.write(OVS_DEFAULT)
# Ensure that the SR-IOV systemd files are copied if a charm-upgrade
# happens
if enable_sriov():
install_sriov_systemd_files()
@hooks.hook('neutron-plugin-relation-changed')
@hooks.hook('config-changed')
@restart_on_change(restart_map())
def config_changed():
# if we are paused, delay doing any config changed hooks.
# It is forced on the resume.
if is_unit_paused_set():
log("Unit is pause or upgrading. Skipping config_changed", "WARN")
return
install_packages()
install_tmpfilesd()
# NOTE(jamespage): purge any packages as a result of py3 switch
# at rocky.
packages_to_purge = determine_purge_packages()
request_nova_compute_restart = False
if packages_to_purge:
purge_packages(packages_to_purge)
request_nova_compute_restart = True
sysctl_settings = config('sysctl')
if not is_container() and sysctl_settings:
create_sysctl(sysctl_settings,
'/etc/sysctl.d/50-openvswitch.conf')
configure_ovs()
CONFIGS.write_all()
# NOTE(fnordahl): configure_sriov must be run after CONFIGS.write_all()
# to allow us to enable boot time execution of init script
configure_sriov()
for rid in relation_ids('neutron-plugin'):
neutron_plugin_joined(
relation_id=rid,
request_restart=request_nova_compute_restart)
@hooks.hook('neutron-plugin-api-relation-changed')
@restart_on_change(restart_map())
def neutron_plugin_api_changed():
packages_to_purge = []
if use_dvr():
install_packages()
# per 17.08 release notes L3HA + DVR is a Newton+ feature
_os_release = os_release('neutron-common', base='icehouse')
if (use_l3ha() and
CompareOpenStackReleases(_os_release) >= 'newton'):
install_l3ha_packages()
# NOTE(hopem): don't uninstall keepalived if not using l3ha since that
# results in neutron-l3-agent also being uninstalled (see LP 1819499).
else:
packages_to_purge = deepcopy(DVR_PACKAGES)
packages_to_purge.extend(L3HA_PACKAGES)
if packages_to_purge:
purge_packages(packages_to_purge)
configure_ovs()
CONFIGS.write_all()
# If dvr setting has changed, need to pass that on
for rid in relation_ids('neutron-plugin'):
neutron_plugin_joined(relation_id=rid)
@hooks.hook('neutron-plugin-relation-joined')
def neutron_plugin_joined(relation_id=None, request_restart=False):
secret = None
if not is_container():
if enable_local_dhcp():
install_packages()
else:
pkgs = deepcopy(DHCP_PACKAGES)
# NOTE: only purge metadata packages if dvr is not
# in use as this will remove the l3 agent
# see https://pad.lv/1515008
if not use_dvr():
# NOTE(fnordahl) do not remove ``haproxy``, the principal
# charm may have use for it. LP: #1832739
pkgs.extend(set(METADATA_PACKAGES)-set(['haproxy']))
purge_packages(pkgs)
secret = get_shared_secret() if enable_nova_metadata() else None
rel_data = {
'metadata-shared-secret': secret,
}
host = neutron_ovs_context.HostIPContext()().get('host')
if host:
rel_data.update({'host': host})
if request_restart:
rel_data['restart-nonce'] = str(uuid.uuid4())
relation_set(relation_id=relation_id, **rel_data)
@hooks.hook('amqp-relation-joined')
def amqp_joined(relation_id=None):
relation_set(relation_id=relation_id,
username=config('rabbit-user'),
vhost=config('rabbit-vhost'))
@hooks.hook('amqp-relation-changed')
@hooks.hook('amqp-relation-departed')
@restart_on_change(restart_map())
def amqp_changed():
if 'amqp' not in CONFIGS.complete_contexts():
log('amqp relation incomplete. Peer not ready?')
return
CONFIGS.write_all()
@hooks.hook('neutron-control-relation-changed')
@restart_on_change(restart_map(), stopstart=True)
def restart_check():
CONFIGS.write_all()
@hooks.hook('pre-series-upgrade')
def pre_series_upgrade():
log("Running prepare series upgrade hook", "INFO")
series_upgrade_prepare(
pause_unit_helper, CONFIGS)
@hooks.hook('post-series-upgrade')
def post_series_upgrade():
log("Running complete series upgrade hook", "INFO")
series_upgrade_complete(
resume_unit_helper, CONFIGS)
@hooks.hook('update-status')
def dummy_update_status():
"""Dummy function to silence missing hook log entry"""
pass
def main():
try:
hooks.execute(sys.argv)
except UnregisteredHookError as e:
log('Unknown hook {} - skipping.'.format(e))
assess_status(CONFIGS)
if __name__ == '__main__':
main()
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