Created
April 15, 2019 00:00
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server_stats2mqtt.py
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import paho.mqtt.client as mqtt | |
from urllib.parse import urlparse | |
import time, datetime | |
import json | |
import os | |
import yaml | |
import logging | |
import psutil | |
import threading | |
import re | |
from logging.handlers import RotatingFileHandler | |
class ServerStats(): | |
def __init__(self): | |
self.stop = False | |
self.init_logging('Server_Metrics.log') | |
self.thread = threading.Event() | |
self.devices = {} | |
self.devices['cpu_usage'] = {'name':'Cpu Usage', 'device_class':'sensor', 'location':'server', 'unit_of_measurement':'%', 'value_template':'{{ value_json.cpu_usage}}', 'value':0} | |
self.devices['vmem_usage'] = {'name':'Virtual Memory', 'device_class':'sensor', 'location':'server', 'unit_of_measurement':'%', 'value_template':'{{ value_json.vmem_usage}}', 'value':0} | |
self.devices['smem_usage'] = {'name':'Swap Memory', 'device_class':'sensor', 'location':'server', 'unit_of_measurement':'%', 'value_template':'{{ value_json.smem_usage}}', 'value':0} | |
self.read_config() | |
self.connect_to_mqtt() | |
self.config_devices() | |
self.get_stats() | |
def get_stats(self): | |
self.devices['cpu_usage']['value'] = psutil.cpu_percent(interval=1) | |
self.devices['vmem_usage']['value'] = psutil.virtual_memory().percent | |
self.devices['smem_usage']['value'] = psutil.swap_memory().percent | |
state_topic = '%s/%s/%s/state' % (self.mqtt_topic, 'sensor', 'server') | |
self.mqttc.publish(state_topic, json.dumps({'cpu_usage': self.devices['cpu_usage']['value'], | |
'vmem_usage': self.devices['vmem_usage']['value'], | |
'smem_usage': self.devices['smem_usage']['value'],})) | |
if not self.thread.is_set() and not self.stop: | |
threading.Timer(10, self.get_stats).start() | |
def read_config(self): | |
"""read config, filename is config.yml""" | |
cur_dir = os.path.dirname(os.path.abspath(__file__)) | |
config_file = os.path.join(cur_dir, 'config.yml') | |
with open(config_file, "r") as f: | |
config = list(yaml.load_all(f))[0] | |
if 'mqtt' in config: | |
self.mqtt_path = 'mqtt://%s:%s' % (config['mqtt']['server'], config['mqtt']['port']) | |
self.mqtt_topic = config['mqtt']['topic'] | |
self.ha_state_topic = config['mqtt']['ha_state_topic'] | |
def connect_to_mqtt(self): | |
self.mqttc = mqtt.Client() | |
url = urlparse(self.mqtt_path) | |
# Connect | |
self.mqttc.connect(url.hostname, url.port) | |
# Start subscribe, with QoS level 0 | |
self.mqttc.subscribe(self.mqtt_topic + '/server_stats', 0) | |
self.mqttc.subscribe(self.ha_state_topic, 0) | |
# Assign event callbacks | |
self.mqttc.on_message = self.on_message | |
def on_message(self, client, obj, msg): | |
self.logger.debug(msg.topic + " " + str(msg.qos) + " " + str(msg.payload)) | |
#isilentllc/switch/garage/set | |
if msg.topic == self.ha_state_topic: | |
if msg.payload == b'online': | |
self.logger.debug('Homeassistant boot event, resending Server Metrics device list.') | |
#Resend device info | |
self.config_devices() | |
def init_logging(self, path): | |
"""Start Logging""" | |
self.logger = logging.getLogger("Server Metrics Log") | |
self.logger.setLevel(logging.DEBUG) | |
handler = RotatingFileHandler(path, maxBytes=20000, backupCount=1) | |
self.logger.addHandler(handler) | |
self.logger.debug('Server Metrics Start Event') | |
def config_devices(self): | |
"""Configure devices in home assistant""" | |
state_topic = '%s/%s/%s/state' % (self.mqtt_topic, 'sensor', 'server') | |
for dev, config in self.devices.items(): | |
config_topic = '%s/%s/%s/config' % (self.mqtt_topic, config['device_class'], dev) | |
config_payload = {#'device_class': config['device_class'], | |
'name': config['name'], | |
'state_topic': state_topic, | |
'unit_of_measurement': config['unit_of_measurement'], | |
'value_template': config['value_template'], | |
} | |
self.mqttc.publish(config_topic, json.dumps(config_payload)) | |
if __name__ == "__main__": | |
try: | |
server_stats = ServerStats() | |
server_stats.mqttc.loop_start() | |
print('server2mqtt running') | |
while 1: | |
time.sleep(1) | |
except KeyboardInterrupt: | |
pass | |
except Exception as e: | |
print(e) | |
finally: | |
if server_stats: | |
server_stats.mqttc.loop_stop() | |
server_stats.stop = True |
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