pvc/node-daemon/plugins/nics

199 lines
8.1 KiB
Python

#!/usr/bin/env python3
# nics.py - PVC Monitoring example plugin for NIC interfaces
# Part of the Parallel Virtual Cluster (PVC) system
#
# Copyright (C) 2018-2022 Joshua M. Boniface <joshua@boniface.me>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
###############################################################################
# This script provides an example of a PVC monitoring plugin script. It will create
# a simple plugin to check the network interfaces of the host, specifically for speed
# and 802.3ad status (if applicable).
# This script can thus be used as an example or reference implementation of a
# PVC monitoring pluginscript and expanded upon as required.
# A monitoring plugin script must implement the class "MonitoringPluginScript" which
# extends "MonitoringPlugin", providing the 3 functions indicated. Detailed explanation
# of the role of each function is provided in context of the example; see the other
# examples for more potential uses.
# WARNING:
#
# This script will run in the context of the node daemon keepalives as root.
# DO NOT install untrusted, unvetted plugins under any circumstances.
# This import is always required here, as MonitoringPlugin is used by the
# MonitoringPluginScript class
from pvcnoded.objects.MonitoringInstance import MonitoringPlugin
# A monitoring plugin script must always expose its nice name, which must be identical to
# the file name
PLUGIN_NAME = "nics"
# The MonitoringPluginScript class must be named as such, and extend MonitoringPlugin.
class MonitoringPluginScript(MonitoringPlugin):
def setup(self):
"""
setup(): Perform special setup steps during node daemon startup
This step is optional and should be used sparingly.
If you wish for the plugin to not load in certain conditions, do any checks here
and return a non-None failure message to indicate the error.
"""
pass
def run(self, coordinator_state=None):
"""
run(): Perform the check actions and return a PluginResult object
The {coordinator_state} can be used to check if this is a "primary" coordinator, "secondary" coordinator, or "hypervisor" (non-coordinator)
"""
# Run any imports first
import daemon_lib.common as common
from re import match, search, findall
messages = list()
health_delta = 0
# Get a list of the various underlying devices
_core_nics = set()
for dev in [
self.config['bridge_dev'],
self.config['upstream_dev'],
self.config['cluster_dev'],
self.config['storage_dev'],
]:
with open(f'/sys/class/net/{dev}/uevent', 'r') as uevent:
_devtype = uevent.readlines()[0].split('=')[-1].strip()
if _devtype == 'vlan':
with open(f"/proc/net/vlan/{dev}") as devfh:
vlan_info = devfh.read().split('\n')
for line in vlan_info:
if match(r'^Device:', line):
dev = line.split()[-1]
_core_nics.add(dev)
core_nics = sorted(list(_core_nics))
for dev in core_nics:
with open(f'/sys/class/net/{dev}/uevent', 'r') as uevent:
_devtype = uevent.readlines()[0].split('=')[-1].strip()
if _devtype == "bond":
syspath = f"/proc/net/bonding/{dev}"
with open(syspath) as devfh:
bonding_stats = devfh.read()
_, _mode, _info, *_slaves = bonding_stats.split('\n\n')
slave_interfaces = list()
for slavedev in _slaves:
lines = slavedev.split('\n')
for line in lines:
if match(r'^Slave Interface:', line):
interface_name = line.split()[-1]
if match(r'^MII Status:', line):
interface_status = line.split()[-1]
if match(r'^Speed:', line):
try:
interface_speed_mbps = int(line.split()[-2])
except Exception:
interface_speed_mbps = 0
if match(r'^Duplex:', line):
interface_duplex = line.split()[-1]
slave_interfaces.append((interface_name, interface_status, interface_speed_mbps, interface_duplex))
# Ensure at least 2 slave interfaces are up
slave_interface_up_count = 0
for slave_interface in slave_interfaces:
if slave_interface[1] == 'up':
slave_interface_up_count += 1
if slave_interface_up_count < 2:
messages.append(f"{dev} DEGRADED with {slave_interface_up_count} active slaves")
health_delta += 10
else:
messages.append(f"{dev} OK with {slave_interface_up_count} active slaves")
# Get ethtool supported speeds for slave interfaces
supported_link_speeds = set()
for slave_interface in slave_interfaces:
slave_dev = slave_interface[0]
_, ethtool_stdout, _ = common.run_os_command(f"ethtool {slave_dev}")
in_modes = False
for line in ethtool_stdout.split('\n'):
if search('Supported link modes:', line):
in_modes = True
if search('Supported pause frame use:', line):
in_modes = False
break
if in_modes:
speed = int(findall(r'\d+', line.split()[-1])[0])
supported_link_speeds.add(speed)
else:
# Get ethtool supported speeds for interface
supported_link_speeds = set()
_, ethtool_stdout, _ = common.run_os_command(f"ethtool {dev}")
in_modes = False
for line in ethtool_stdout.split('\n'):
if search('Supported link modes:', line):
in_modes = True
if search('Supported pause frame use:', line):
in_modes = False
break
if in_modes:
speed = int(line.split()[-1].replace('baseT', '').split('/')[0])
supported_link_speeds.add(speed)
max_supported_link_speed = sorted(list(supported_link_speeds))[-1]
# Ensure interface is running at its maximum speed
with open(f"/sys/class/net/{dev}/speed") as devfh:
dev_speed = int(devfh.read())
if dev_speed < max_supported_link_speed:
messages.append(f"{dev} DEGRADED at {dev_speed} Mbps")
health_delta += 10
else:
messages.append(f"{dev} OK at {dev_speed} Mbps")
# Set the health delta in our local PluginResult object
self.plugin_result.set_health_delta(health_delta)
# Set the message in our local PluginResult object
self.plugin_result.set_message(', '.join(messages))
# Return our local PluginResult object
return self.plugin_result
def cleanup(self):
"""
cleanup(): Perform special cleanup steps during node daemon termination
This step is optional and should be used sparingly.
"""
pass