Fix handling of SR-IOV interface configuration

SR-IOV interfaces are currently only configured on charm
installation and not after seubsequent reboots.

The VFs need to be configured before the Neutron SR-IOV
agent is started. Charms should also really not be involved
in boot time system configuration. Due to these factors
this commit adds a init script and corrensponding systemd
unit file and upstart job to handle the boot-time configuration.

Keep configure_sriov function for runtime configuration. Add
warning about runtime configuration disrupting network service.

Add restart of Neutron SR-IOV agent after runtime configuration.

Cap value of sriov-numvfs at each interfaces sriov_totalvfs value.

Change-Id: I7bde7217bf027db09ded35a262c214ccb11d6d86
Closes-Bug: #1697572
This commit is contained in:
Frode Nordahl 2017-08-23 12:35:47 +02:00 committed by Billy Olsen
parent 65b5274f63
commit 4ffbc2fe25
12 changed files with 307 additions and 35 deletions

1
.gitignore vendored
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@ -6,3 +6,4 @@ tags
*.sw[nop]
*.pyc
.unit-state.db
.pydevproject

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@ -1,9 +0,0 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?eclipse-pydev version="1.0"?><pydev_project>
<pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python 2.7</pydev_property>
<pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
<pydev_pathproperty name="org.python.pydev.PROJECT_SOURCE_PATH">
<path>/neutron-openvswitch/hooks</path>
<path>/neutron-openvswitch/unit_tests</path>
</pydev_pathproperty>
</pydev_project>

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@ -207,6 +207,10 @@ options:
.
Multiple devices can be configured by providing multi values delimited by
spaces.
.
NOTE: Changing this value will disrupt networking on all SR-IOV capable
interfaces for blanket configuration or listed interfaces when per-device
configuration is used.
worker-multiplier:
type: float
default:

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@ -143,6 +143,20 @@ class OVSPluginContext(context.NeutronContext):
','.join(sriov_mappings.split())
)
enable_sriov = config('enable-sriov')
if enable_sriov:
ovs_ctxt['enable_sriov'] = True
sriov_numvfs = config('sriov-numvfs')
if sriov_numvfs:
try:
if sriov_numvfs != 'auto':
int(sriov_numvfs)
except ValueError:
ovs_ctxt['sriov_vfs_list'] = sriov_numvfs
else:
ovs_ctxt['sriov_vfs_blanket'] = sriov_numvfs
flat_providers = config('flat-network-providers')
if flat_providers:
ovs_ctxt['network_providers'] = ','.join(flat_providers.split())

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@ -73,8 +73,10 @@ def config_changed():
git_install(config('openstack-origin-git'))
configure_ovs()
configure_sriov()
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('zeromq-configuration'):
zeromq_configuration_relation_joined(rid)
for rid in relation_ids('neutron-plugin'):

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@ -147,6 +147,18 @@ OVS_DEFAULT = '/etc/default/openvswitch-switch'
DPDK_INTERFACES = '/etc/dpdk/interfaces'
NEUTRON_SRIOV_AGENT_CONF = os.path.join(NEUTRON_CONF_DIR,
'plugins/ml2/sriov_agent.ini')
NEUTRON_SRIOV_INIT_SCRIPT = os.path.join('/etc/init.d',
'neutron-openvswitch-'
'networking-sriov.sh')
NEUTRON_SRIOV_INIT_DEFAULT = os.path.join('/etc/default',
'neutron-openvswitch-'
'networking-sriov')
NEUTRON_SRIOV_SYSTEMD_UNIT = os.path.join('/lib/systemd/system',
'neutron-openvswitch-'
'networking-sriov.service')
NEUTRON_SRIOV_UPSTART_CONF = os.path.join('/etc/init',
'neutron-openvswitch-'
'networking-sriov.conf')
BASE_RESOURCE_MAP = OrderedDict([
(NEUTRON_CONF, {
@ -218,6 +230,22 @@ SRIOV_RESOURCE_MAP = OrderedDict([
'services': ['neutron-sriov-agent'],
'contexts': [neutron_ovs_context.OVSPluginContext()],
}),
(NEUTRON_SRIOV_INIT_DEFAULT, {
'services': [],
'contexts': [neutron_ovs_context.OVSPluginContext()],
}),
(NEUTRON_SRIOV_INIT_SCRIPT, {
'services': [],
'contexts': [],
}),
(NEUTRON_SRIOV_SYSTEMD_UNIT, {
'services': [],
'contexts': [],
}),
(NEUTRON_SRIOV_UPSTART_CONF, {
'services': [],
'contexts': [],
}),
])
TEMPLATES = 'templates/'
@ -279,7 +307,7 @@ def determine_packages():
if use_dpdk():
pkgs.append('openvswitch-switch-dpdk')
if enable_sriov_agent():
if enable_sriov():
if cmp_release >= 'mitaka':
pkgs.append('neutron-sriov-agent')
else:
@ -331,7 +359,7 @@ def resource_map():
else:
drop_config.extend([OVS_CONF, DPDK_INTERFACES])
if enable_sriov_agent():
if enable_sriov():
sriov_agent_name = 'neutron-sriov-agent'
sriov_resource_map = deepcopy(SRIOV_RESOURCE_MAP)
@ -459,10 +487,23 @@ def configure_ovs():
def configure_sriov():
'''Configure SR-IOV devices based on provided configuration options'''
'''Configure SR-IOV devices based on provided configuration options
NOTE(fnordahl): Boot time configuration is done by init script
intalled by this charm.
This function only does runtime configuration!
'''
charm_config = config()
enable_sriov = charm_config.get('enable-sriov')
if enable_sriov and charm_config.changed('sriov-numvfs'):
if not enable_sriov():
return
# make sure init script has correct mode and that boot time execution
# is enabled
os.chmod(NEUTRON_SRIOV_INIT_SCRIPT, 0o755)
service('enable', 'neutron-openvswitch-networking-sriov')
if charm_config.changed('sriov-numvfs'):
devices = PCINetDevices()
sriov_numvfs = charm_config.get('sriov-numvfs')
@ -474,19 +515,31 @@ def configure_sriov():
log("Configuring SR-IOV device"
" {} with {} VF's".format(device.interface_name,
device.sriov_totalvfs))
# NOTE(fnordahl): run-time change of numvfs is disallowed
# without resetting to 0 first.
device.set_sriov_numvfs(0)
device.set_sriov_numvfs(device.sriov_totalvfs)
else:
# Single int blanket configuration
try:
sriov_numvfs = int(sriov_numvfs)
log('Configuring SR-IOV device VF functions'
' with blanket setting')
for device in devices.pci_devices:
if device and device.sriov:
log("Configuring SR-IOV device"
" {} with {} VF's".format(device.interface_name,
sriov_numvfs))
device.set_sriov_numvfs(sriov_numvfs)
numvfs = min(int(sriov_numvfs), device.sriov_totalvfs)
if int(sriov_numvfs) > device.sriov_totalvfs:
log('Requested value for sriov-numvfs ({}) too '
'high for interface {}. Falling back to '
'interface totalvfs '
'value: {}'.format(sriov_numvfs,
device.interface_name,
device.sriov_totalvfs))
log("Configuring SR-IOV device {} with {} "
"VFs".format(device.interface_name, numvfs))
# NOTE(fnordahl): run-time change of numvfs is
# disallowed without resetting to 0 first.
device.set_sriov_numvfs(0)
device.set_sriov_numvfs(numvfs)
except ValueError:
# <device>:<numvfs>[ <device>:numvfs] configuration
sriov_numvfs = sriov_numvfs.split()
@ -496,14 +549,33 @@ def configure_sriov():
device = devices.get_device_from_interface_name(
interface_name)
if device and device.sriov:
log("Configuring SR-IOV device"
" {} with {} VF's".format(device.interface_name,
numvfs))
if int(numvfs) > device.sriov_totalvfs:
log('Requested value for sriov-numfs ({}) too '
'high for interface {}. Falling back to '
'interface totalvfs '
'value: {}'.format(numvfs,
device.interface_name,
device.sriov_totalvfs))
numvfs = device.sriov_totalvfs
log("Configuring SR-IOV device {} with {} "
"VF's".format(device.interface_name, numvfs))
# NOTE(fnordahl): run-time change of numvfs is
# disallowed without resetting to 0 first.
device.set_sriov_numvfs(0)
device.set_sriov_numvfs(int(numvfs))
# Trigger remote restart in parent application
remote_restart('neutron-plugin', 'nova-compute')
# Restart of SRIOV agent is required after changes to system runtime
# VF configuration
cmp_release = CompareOpenStackReleases(
os_release('neutron-common', base='icehouse'))
if cmp_release >= 'mitaka':
service_restart('neutron-sriov-agent')
else:
service_restart('neutron-plugin-sriov-agent')
def get_shared_secret():
ctxt = neutron_ovs_context.SharedSecretContext()()
@ -533,8 +605,8 @@ def use_dpdk():
return (cmp_release >= 'mitaka' and config('enable-dpdk'))
def enable_sriov_agent():
'''Determine with SR-IOV agent should be used'''
def enable_sriov():
'''Determine whether SR-IOV is enabled and supported'''
cmp_release = CompareOpenStackReleases(
os_release('neutron-common', base='icehouse'))
return (cmp_release >= 'kilo' and config('enable-sriov'))

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@ -0,0 +1,26 @@
# Set to 1 to configure Virtual Functions on system startup.
{% if enable_sriov -%}
ENABLE=1
{% else -%}
ENABLE=0
{% endif -%}
# Blanket configuration for number of Virtual Functions across all NICs
#
# Possible configurations:
# auto - Set sriov_numvfs to value of sriov_totalvfs for each interface
# N - Set sriov_numvfs on all interfaces to N or value of sriov_totalvfs
# if sriov_totalvfs is less than N for that interface
#
{% if sriov_vfs_blanket -%}
VFS_BLANKET={{ sriov_vfs_blanket }}
{% else -%}
VFS_BLANKET=auto
{% endif -%}
# List of <device>:<numvfs> tuples for configuration of specific NICs
#
#VFS_LIST=ens3p0:16 ens4p0:16
{% if sriov_vfs_list -%}
VFS_LIST={{ sriov_vfs_list }}
{% endif -%}

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@ -0,0 +1,11 @@
description "Configure SRIOV Virtual Functions"
author "Frode Nordahl <frode.nordahl@gmail.com>"
start on virtual-filesystems
task
console log
script
[ -x "/etc/init.d/neutron-openvswitch-networking-sriov.sh" ] || exit 0
exec /etc/init.d/neutron-openvswitch-networking-sriov.sh start
end script

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@ -0,0 +1,19 @@
[Unit]
Description=Configure SRIOV Virtual Functions
DefaultDependencies=no
Wants=network.target
After=local-fs.target network-pre.target apparmor.service systemd-sysctl.service systemd-modules-load.service
Before=network.target shutdown.target network-online.target
Conflicts=shutdown.target
[Install]
WantedBy=multi-user.target
WantedBy=network-online.target
[Service]
Type=oneshot
EnvironmentFile=-/etc/default/networking-sriov
ExecStart=/etc/init.d/neutron-openvswitch-networking-sriov.sh systemd-start
ExecStop=/etc/init.d/neutron-openvswitch-networking-sriov.sh systemd-stop
RemainAfterExit=true
TimeoutStartSec=5min

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@ -0,0 +1,121 @@
#!/bin/sh
### BEGIN INIT INFO
# Provides: networking-sriov
# Required-Start: mountkernfs $local_fs
# Required-Stop: $local_fs
# Default-Start: S
# Default-Stop: 0 6
# Short-Description: Configure SRIOV Virtual Functions
### END INIT INFO
# Authors: Frode Nordahl <frode.nordahl@gmail.com>
DESC="Configure SRIOV Virtual Functions"
. /lib/lsb/init-functions
# Include defaults if available
if [ -f /etc/default/neutron-openvswitch-networking-sriov ] ; then
. /etc/default/neutron-openvswitch-networking-sriov
fi
if [ -z "${ENABLE}" ]; then
ENABLE=0
fi
if [ -z "${VFS_BLANKET}" ]; then
VFS_BLANKET=auto
fi
# Exit if feature is not enabled
[ $ENABLE -gt 0 ] || exit 0
do_wait_for_vfs() {
# Wait for VFs to be created
PCI_DEVICE_PATH=$1
NUMVFS=$2
[ -z "${DEBUG}" ] || echo "do_wait_for_vfs ${PCI_DEVICE_PATH} ${NUMVFS}"
while [ `ls -1 "${PCI_DEVICE_PATH}/" | wc -l` -lt "${NUMVFS}" ]; do
[ -z "${DEBUG}" ] || echo wait...
sleep 0.05
done
}
do_configure_vfs() {
if [ ! -z "${VFS_LIST}" ]; then
# Do configuration according to list of <device>:<numvfs> tuples
OIFS="$IFS"
echo "${VFS_LIST}" | \
while IFS=':' read DEVICE NUMVFS; do
# Check whether we should stop
[ -z "${STOP}" ] || NUMVFS=0
[ -z "${DEBUG}" ] || echo "echo ${NUMVFS} \> /sys/class/net/${DEVICE}/device/sriov_numvfs"
echo "${NUMVFS}" > "/sys/class/net/${DEVICE}/device/sriov_numvfs"
do_wait_for_vfs "/sys/class/net/${DEVICE}/device" "${NUMVFS}"
done
IFS="$OIFS"
else
# Do blanket configuration
SYSFS_LST=`find /sys/devices -name sriov_totalvfs`
for ENT in $SYSFS_LST; do
DENT=`dirname $ENT`
if [ -d ${DENT}/net ]; then
TOTALVFS=`cat "${ENT}"`
[ -z "${STOP}" ] || VFS_BLANKET=0
if [ "${VFS_BLANKET}" = "auto" ]; then
# Set sriov_numvfs to value of sriov_toatlvfs for "auto"
NUMVFS=$TOTALVFS
elif [ "${VFS_BLANKET}" -gt "${TOTALVFS}" ]; then
# Set sriov_numvfs to value of sriov_totalvfs if
# requested number is larger than sriov_totalvfs
NUMVFS=$TOTALVFS
else
NUMVFS=$VFS_BLANKET
fi
# Set sriov_numvfs to requested number
[ -z "${DEBUG}" ] || echo "echo ${NUMVFS} \> ${DENT}/sriov_numvfs"
echo "${NUMVFS}" > "${DENT}/sriov_numvfs"
do_wait_for_vfs "${DENT}" "${NUMVFS}"
fi
done
fi
}
do_start() {
do_configure_vfs
}
do_stop() {
STOP=1
do_configure_vfs
}
case "$1" in
start)
log_daemon_msg "$DESC"
do_start
;;
stop)
log_daemon_msg "Un-$DESC"
do_stop
;;
systemd-start)
do_start
;;
systemd-stop)
do_stop
;;
restart)
log_daemon_msg "Re-$DESC"
do_stop
do_start
;;
*)
N=/etc/init.d/neutron-openvswitch-networking-sriov.sh
echo "Usage: $N {start|stop|restart|systemd-start|systemd-stop}" >&2
;;
esac
exit 0

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@ -243,6 +243,7 @@ class OVSPluginContextTest(CharmTestCase):
'overlay_network_type': 'gre',
'polling_interval': 2,
'rpc_response_timeout': 60,
'sriov_vfs_blanket': 'auto',
'report_interval': 30,
'bridge_mappings': 'physnet1:br-data',
'vlan_ranges': 'physnet1:1000:2000',

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@ -108,6 +108,7 @@ class TestNeutronOVSUtils(CharmTestCase):
@patch.object(nutils, 'determine_packages')
def test_install_packages(self, _determine_packages):
self.os_release.return_value = 'mitaka'
_determine_packages.return_value = 'randompkg'
nutils.install_packages()
self.apt_update.assert_called_with()
@ -116,6 +117,7 @@ class TestNeutronOVSUtils(CharmTestCase):
@patch.object(nutils, 'determine_packages')
def test_install_packages_dkms_needed(self, _determine_packages):
self.os_release.return_value = 'mitaka'
_determine_packages.return_value = 'randompkg'
self.determine_dkms_package.return_value = \
['openvswitch-datapath-dkms']
@ -289,11 +291,11 @@ class TestNeutronOVSUtils(CharmTestCase):
[self.assertIn(q_conf, _map.keys()) for q_conf in confs]
self.assertEqual(_map[nutils.NEUTRON_CONF]['services'], svcs)
@patch.object(nutils, 'enable_sriov_agent')
@patch.object(nutils, 'enable_sriov')
@patch.object(nutils, 'use_dvr')
def test_resource_map_kilo_sriov(self, _use_dvr, _enable_sriov_agent):
def test_resource_map_kilo_sriov(self, _use_dvr, _enable_sriov):
_use_dvr.return_value = False
_enable_sriov_agent.return_value = True
_enable_sriov.return_value = True
self.os_release.return_value = 'kilo'
self.lsb_release.return_value = {'DISTRIB_CODENAME': 'trusty'}
_map = nutils.resource_map()
@ -316,11 +318,11 @@ class TestNeutronOVSUtils(CharmTestCase):
[self.assertIn(q_conf, _map.keys()) for q_conf in confs]
self.assertEqual(_map[nutils.NEUTRON_CONF]['services'], svcs)
@patch.object(nutils, 'enable_sriov_agent')
@patch.object(nutils, 'enable_sriov')
@patch.object(nutils, 'use_dvr')
def test_resource_map_mitaka_sriov(self, _use_dvr, _enable_sriov_agent):
def test_resource_map_mitaka_sriov(self, _use_dvr, _enable_sriov):
_use_dvr.return_value = False
_enable_sriov_agent.return_value = True
_enable_sriov.return_value = True
self.os_release.return_value = 'mitaka'
self.lsb_release.return_value = {'DISTRIB_CODENAME': 'xenial'}
_map = nutils.resource_map()
@ -745,7 +747,9 @@ class TestNeutronOVSUtils(CharmTestCase):
mock_pci_devices.get_device_from_interface_name.side_effect = \
lambda x: self.pci_devices.get(x)
def test_configure_sriov_no_changes(self):
@patch('os.chmod')
def test_configure_sriov_no_changes(self, _os_chmod):
self.os_release.return_value = 'kilo'
_config = {
'enable-sriov': True,
'sriov-numvfs': 'auto'
@ -756,7 +760,9 @@ class TestNeutronOVSUtils(CharmTestCase):
self.assertFalse(self.remote_restart.called)
def test_configure_sriov_auto(self):
@patch('os.chmod')
def test_configure_sriov_auto(self, _os_chmod):
self.os_release.return_value = 'mitaka'
_config = {
'enable-sriov': True,
'sriov-numvfs': 'auto'
@ -773,7 +779,9 @@ class TestNeutronOVSUtils(CharmTestCase):
)
self.assertTrue(self.remote_restart.called)
def test_configure_sriov_numvfs(self):
@patch('os.chmod')
def test_configure_sriov_numvfs(self, _os_chmod):
self.os_release.return_value = 'mitaka'
_config = {
'enable-sriov': True,
'sriov-numvfs': '32',
@ -787,7 +795,9 @@ class TestNeutronOVSUtils(CharmTestCase):
self.assertTrue(self.remote_restart.called)
def test_configure_sriov_numvfs_per_device(self):
@patch('os.chmod')
def test_configure_sriov_numvfs_per_device(self, _os_chmod):
self.os_release.return_value = 'kilo'
_config = {
'enable-sriov': True,
'sriov-numvfs': 'ens0:32 sriov23:64'