106 lines
3.7 KiB
Plaintext
106 lines
3.7 KiB
Plaintext
|
#!/usr/bin/env python3
|
||
|
|
|
||
|
|
# lbvt.py - PVC Monitoring example plugin for Libvirtd
|
||
|
|
# 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 Libvirt daemon instance on the node for operation.
|
||
|
|
|
||
|
|
# 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 = "lbvt"
|
||
|
|
|
||
|
|
|
||
|
|
# 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 lbvt in certain conditions, do any checks here
|
||
|
|
and return a non-None failure message to indicate the error.
|
||
|
|
"""
|
||
|
|
|
||
|
|
pass
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
"""
|
||
|
|
run(): Perform the check actions and return a PluginResult object
|
||
|
|
"""
|
||
|
|
|
||
|
|
# Run any imports first
|
||
|
|
from libvirt import openReadOnly as lvopen
|
||
|
|
|
||
|
|
lv_conn = None
|
||
|
|
|
||
|
|
# Set the health delta to 0 (no change)
|
||
|
|
health_delta = 0
|
||
|
|
# Craft a message that can be used by the clients
|
||
|
|
message = "Successfully connected to Libvirtd on localhost"
|
||
|
|
|
||
|
|
# Check the Zookeeper connection
|
||
|
|
try:
|
||
|
|
lv_conn = lvopen(f"qemu+tcp://{self.this_node.name}/system")
|
||
|
|
data = lv_conn.getHostname()
|
||
|
|
except Exception as e:
|
||
|
|
health_delta = 50
|
||
|
|
message = f"Failed to connect to Libvirtd: {e}"
|
||
|
|
finally:
|
||
|
|
if lv_conn is not None:
|
||
|
|
lv_conn.close()
|
||
|
|
|
||
|
|
# 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(message)
|
||
|
|
|
||
|
|
# 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
|