A ‘live’ console based systems monitor in Python. Can be easily extended to monitor various other things. Currently only monitors disk usage, memory usage and zombie processes. Can provide advice for a user. Written to aid some non technical system users. Update: Added percentage bars and tidied up. Also added a CPU monitor.
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#!/usr/bin/python import sys import os import subprocess import time import re class MessageStore: def __init__(self, id): self._id = id self._buffer = '' self._recommendation = '' self._last_update = 0 def add_message(self, msg, level): self._buffer = '%s [%15s] %s' % (self.__colourise_level(level), self._id, msg) self.last_update = time.strftime('%a %H:%M:%S') def add_recommendation(self, msg): self._recommendation = msg def percentage_bar(self, percentage): percent_to_fill = int(percentage/10) return '[%s%s]' % ("+" * percent_to_fill*2, " " * int(10-percent_to_fill)*2) def __colourise_level(self,level): _red = '\033[1;37;41m' _green = '\033[1;37;42m' _yellow = '\033[1;37;43m' _no_colour = '\033[0m' if level == 'error': return '%s SERIOUS %s' % (_red, _no_colour) elif level == 'warning': return '%s WARNING %s' % (_yellow, _no_colour) else: return '%s OK %s' % (_green, _no_colour) def get_last_update_time(self): return self._last_update def get_recommendation(self): return self._recommendation def get_buffer(self): return self._buffer class MemoryMonitor(MessageStore): def __init__(self, target, interval, limit_mb): MessageStore.__init__(self, 'Memory Monitor') self.target = target self.interval = interval self.last_update_t = 0 self.limit_mb = int(limit_mb) def update(self): if time.time() >= self.last_update_t + self.interval: r = self.get_memory_usage() self.add_message(r[0], r[1]) self.add_recommendation(r[2]) self.last_update_t = time.time() def generate_recommendation(self, level): recommendation = '' if level == 'error': recommendation = 'High memory usage detected, consider restarting process (pkill )' return recommendation def get_memory_usage(self): p = subprocess.Popen("pgrep -f \"%s\" | xargs -n 1 pmap" % self.target, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE); (stdout, stderr) = p.communicate() sum = 0.0 for line in stdout.splitlines(): if "heap" in line or "stack" in line or "anon" in line: #if "dev:" in line: heap = re.split(" +", line) sum = sum + int(heap[1].replace('K','')) if sum/1024 >= self.limit_mb: level = 'error' elif sum/1024 >= self.limit_mb*0.9: level = 'warning' else: level = 'ok' #msg = '%15s %9.1fM [%s]' % (self.target, sum/1024, "+" * int(sum/102400)) msg = '%15s %9.1fM %s' % (self.target, sum/1024, self.percentage_bar((sum/1024)/self.limit_mb*100)) return [msg, level, self.generate_recommendation(level)] class DiskMonitor(MessageStore): def __init__(self, target, interval, limit_perc): MessageStore.__init__(self, 'Disk Monitor') self.target = target self.interval = interval self.last_update_t = 0 self.limit_perc = int(limit_perc) def update(self): if time.time() >= self.last_update_t + self.interval: r = self.get_disk_usage() self.add_message(r[0], r[1]) self.add_recommendation(r[2]) self.last_update_t = time.time() def generate_recommendation(self, level): recommendation = '' if level == 'error': recommendation = 'You got a problem.' elif level == 'warning': recommendation = 'Better watch out.' return recommendation def get_disk_usage(self): p = subprocess.Popen("df -h %s | tail -1 | awk '{print $5}'" % self.target, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE); (stdout, stderr) = p.communicate() usage_perc = int(stdout.strip()[0:-1]) recommendation = '' if usage_perc >= self.limit_perc: level = 'error' elif usage_perc >= self.limit_perc*0.9: level = 'warning' else: level = 'ok' msg = '%15s %7d%% %s' % (self.target, usage_perc, self.percentage_bar(usage_perc)) return [msg, level, self.generate_recommendation(level)] class ZombieProcesses(MessageStore): def __init__(self, interval): MessageStore.__init__(self, 'Zombie Monitor') self.interval = interval self.last_update_t = 0 def update(self): if time.time() >= self.last_update_t + self.interval: r = self.find_zombies() self.add_message(r[0], r[1]) self.last_update_t = time.time() def find_zombies(self): p = subprocess.Popen("ps -ef | grep defunct | grep -v grep | awk '{print $2,$8}'" , shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE); (stdout, stderr) = p.communicate() lines = [] recommendation = '' if not stdout == '': lines = stdout.strip().split("\n") if len(lines) > 0: level = 'warning' else: level = 'ok' msg = " Found %d zombie processes" % len(lines) if len(lines) > 0: for line in lines: print line msg += "\n %30s" % line return [msg, level, recommendation] class CPUMonitor(MessageStore): def __init__(self, interval, limit): MessageStore.__init__(self, 'CPU Monitor') self.interval = interval self.limit = int(limit) self.last_update_t = 0 def update(self): if time.time() >= self.last_update_t + self.interval: r = self.get_cpu_usage() self.add_message(r[0], r[1]) self.last_update_t = time.time() def generate_recommendation(self, level): recommendation = '' if level == 'error': recommendation = 'Very high CPU percentage detected, a high CPU percentage could affect stability. Try closing unnecessary scripts running on the machine.' return recommendation def get_cpu_usage(self): p = subprocess.Popen("sar 1 | tail -1 | awk '{print $2}'" , shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE); (stdout, stderr) = p.communicate() cpu_usage = int(stdout.strip()) recommendation = '' if cpu_usage >= self.limit: level = 'error' elif cpu_usage >= self.limit*0.9: level = 'warning' else: level = 'ok' msg = " CPU usage %7d%% %s" % (cpu_usage, self.percentage_bar(cpu_usage)) return [msg, level, self.generate_recommendation(level)] def clear_screen(): print "\033[1;1f\033[2K" if __name__ == "__main__": processes = [MemoryMonitor('chrome', 60, 400), MemoryMonitor('compiz', 60, 12000), DiskMonitor('/tmp', 60, 90), DiskMonitor('/home', 120, 80), CPUMonitor(20, 80) ] print "\033[2J" while True: clear_screen() print time.strftime('%a %H:%M:%S') last_process_id = '' recommendations = [] for process in processes: if process._id != last_process_id: print "\n" last_process_id = process._id process.update() if process.get_recommendation() != '': recommendations.append(process.get_recommendation()) print process.get_buffer() if len(recommendations): print '' print '---------------------------------------------' print '' print ("\n").join(recommendations) time.sleep(2) |
Questions? Comments?