Psutil + Flask + Pyecharts + Bootstrap 开发动态可视化系统监控

liuian 2024-12-11 15:43 639 浏览

文 | 某某白米饭

来源：Python 技术「ID: pythonall」

psutil 是一个跨平台库（http://pythonhosted.org/psutil）能够获取到系统运行的进程和系统利用率（包括CPU、内存、磁盘、网络等）信息。主要用来做系统监控，性能分析，进程管理。支持 Linux、Mac OS、Windows 系统。

本文以 psutil 模块获取系统信息开发一个监控 Mac OS 系统的平台。

准备工作

技术选择

监控的系统是 Mac OS 系统
监控系统模块选择 psutil 模块
Web 框架选择的是 Flask 框架
前端 UI 选择的是 Bootstrap UI
动态可视化图表选择 Pyecharts 模块

安装 psutil

pip3 install psutil

安装 Flask、pyecharts、Bootstrap

Flask 的教程是在公众号文章：Web 开发 Flask 介绍
Pyecharts 的教程在公众号文章：Python 图表利器 pyecharts，按照官网 (http://pyecharts.org/#/zh-cn/web_flask) 文档整合 Flask 框架，并使用定时全量更新图表。
Bootstrap 是一个前端的 Web UI，官网地址是 (https://v4.bootcss.com)

获取系统信息

CPU信息

通过 psutil 获取 CPU 信息

>>> import psutil
# 获取当前 CPU 的利用率>>> psutil.cpu_percent53.8
# 获取当前 CPU 的用户/系统/空闲时间>>> psutil.cpu_timesscputimes(user=197483.49, nice=0.0, system=114213.01, idle=1942295.68)
# 1/5/15 分钟之内的 CPU 负载>>> psutil.getloadavg(7.865234375, 5.1826171875, 4.37353515625)
# CPU 逻辑个数>>> psutil.cpu_count4
# CPU 物理个数>>> psutil.cpu_count(logical=False)2

在监控平台上每 2 秒请求 url 获取 CPU 负载，并动态显示图表

cpu_percent_dict = {}def cpu: # 当前时间 now = time.strftime('%H:%M:%S', time.localtime(time.time)) # CPU 负载 cpu_percent = psutil.cpu_percent cpu_percent_dict[now] = cpu_percent
 # 保持在图表中 10 个数据 if len(cpu_percent_dict.keys) == 11: cpu_percent_dict.pop(list(cpu_percent_dict.keys)[0])
def cpu_line -> Line: cpu # 全量更新 pyecharts 图表 c = ( Line .add_xaxis(list(cpu_percent_dict.keys)) .add_yaxis('', list(cpu_percent_dict.values), areastyle_opts=opts.AreaStyleOpts(opacity=0.5)) .set_global_opts(title_opts=opts.TitleOpts(title = now + "CPU负载",pos_left = "center"), yaxis_opts=opts.AxisOpts(min_=0,max_=100,split_number=10,type_="value", name='%')) ) return c
@app.route("/cpu")def get_cpu_chart: c = cpu_line return c.dump_options_with_quotes

示例结果

内存

通过 psutil 获取内存和交换区信息

# 系统内存信息 总内存/立刻可用给进程使用的内存/内存负载/已使用内存/空闲内存/当前正在使用或者最近使用的内存/未使用的内存/永久在内存>>> psutil.virtual_memorysvmem(total=8589934592, available=2610610176, percent=69.6, used=4251074560, free=387874816, active=2219110400, inactive=2069094400, wired=2031964160)
# 交换区内存 总内存/使用的内存/空闲的内存/负载/系统从磁盘交换进来的字节数(累计)/系统从磁盘中交换的字节数（累积）>>> psutil.swap_memorysswap(total=2147483648, used=834404352, free=1313079296, percent=38.9, sin=328911147008, sout=3249750016)

在监控平台上每 2 秒请求 url 获取内存负载，并动态显示图表

def memory: memory = psutil.virtual_memory swap = psutil.swap_memory # 在 Mac OS 上 未使用内存 = 总内存 - (空闲内存 + 未使用内存) return memory.total, memory.total - (memory.free + memory.inactive), memory.free + memory.inactive, swap.total, swap.used, swap.free, memory.percent

def memory_liquid -> Gauge: mtotal, mused, mfree, stotal, sused, sfree, mpercent = memory c = ( Gauge .add("", [("", mpercent)]) .set_global_opts(title_opts=opts.TitleOpts(title="内存负载", pos_left = "center")) ) return mtotal, mused, mfree, stotal, sused, sfree, c
@app.route("/memory")def get_memory_chart: mtotal, mused, mfree, stotal, sused, sfree, c = memory_liquid return jsonify({'mtotal': mtotal, 'mused': mused, 'mfree': mfree, 'stotal': stotal, 'sused': sused, 'sfree': sfree, 'liquid': c.dump_options_with_quotes})

示例结果

磁盘

通过 psutil 获取磁盘大小、分区、使用率和磁盘IO

# 磁盘分区情况>>> psutil.disk_partitions[sdiskpart(device='/dev/disk1s5', mountpoint='/', fstype='apfs', opts='ro,local,rootfs,dovolfs,journaled,multilabel'), sdiskpart(device='/dev/disk1s1', mountpoint='/System/Volumes/Data', fstype='apfs', opts='rw,local,dovolfs,dontbrowse,journaled,multilabel'), sdiskpart(device='/dev/disk1s4', mountpoint='/private/var/vm', fstype='apfs', opts='rw,local,dovolfs,dontbrowse,journaled,multilabel'), sdiskpart(device='/dev/disk1s3', mountpoint='/Volumes/Recovery', fstype='apfs', opts='rw,local,dovolfs,dontbrowse,journaled,multilabel')]
# 磁盘的使用情况 磁盘总大小/已使用大小/空闲大小/负载>>> psutil.disk_usage('/')sdiskusage(total=250790436864, used=10872418304, free=39636717568, percent=21.5)
# 磁盘IO 读取次数/写入次数/读取数据/写入数据/磁盘读取所花费的时间/写入磁盘所花费的时间>>> psutil.disk_io_counterssdiskio(read_count=26404943, write_count=11097500, read_bytes=609467826688, write_bytes=464322912256, read_time=7030486, write_time=2681553)

在监控平台上每 2 秒请求 url 获取磁盘信息，并动态显示图表

disk_dict = {'disk_time':, 'write_bytes': , 'read_bytes': , 'pre_write_bytes': 0, 'pre_read_bytes': 0, 'len': -1}def disk: disk_usage = psutil.disk_usage('/') disk_used = 0 # 磁盘已使用大小 = 每个分区的总和 partitions = psutil.disk_partitions for partition in partitions: partition_disk_usage = psutil.disk_usage(partition[1]) disk_used = partition_disk_usage.used + disk_used
 now = time.strftime('%H:%M:%S', time.localtime(time.time)) count = psutil.disk_io_counters read_bytes = count.read_bytes write_bytes = count.write_bytes # 第一次请求 if disk_dict['len'] == -1: disk_dict['pre_write_bytes'] = write_bytes disk_dict['pre_read_bytes'] = read_bytes disk_dict['len'] = 0 return disk_usage.total, disk_used, disk_usage.free # 当前速率=现在写入/读取的总字节-前一次请求写入/读取的总字节 disk_dict['write_bytes'].append((write_bytes - disk_dict['pre_write_bytes'])/1024) disk_dict['read_bytes'].append((read_bytes - disk_dict['pre_read_bytes'])/ 1024) disk_dict['disk_time'].append(now) disk_dict['len'] = disk_dict['len'] + 1 # 把现在写入/读取的总字节放入前一个请求的变量中 disk_dict['pre_write_bytes'] = write_bytes disk_dict['pre_read_bytes'] = read_bytes # 保持在图表中 50 个数据 if disk_dict['len'] == 51: disk_dict['write_bytes'].pop(0) disk_dict['read_bytes'].pop(0) disk_dict['disk_time'].pop(0) disk_dict['len'] = disk_dict['len'] - 1
 return disk_usage.total, disk_used, disk_usage.free

def disk_line -> Line: total, used, free = disk c = ( Line(init_opts=opts.InitOpts(width="1680px", height="800px")) .add_xaxis(xaxis_data=disk_dict['disk_time']) .add_yaxis( series_name="写入数据", y_axis=disk_dict['write_bytes'], areastyle_opts=opts.AreaStyleOpts(opacity=0.5), linestyle_opts=opts.LineStyleOpts, label_opts=opts.LabelOpts(is_show=False), ) .add_yaxis( series_name="读取数据", y_axis=disk_dict['read_bytes'], yaxis_index=1, areastyle_opts=opts.AreaStyleOpts(opacity=0.5), linestyle_opts=opts.LineStyleOpts, label_opts=opts.LabelOpts(is_show=False), ) .extend_axis( yaxis=opts.AxisOpts( name_location="start", type_="value", is_inverse=True, axistick_opts=opts.AxisTickOpts(is_show=True), splitline_opts=opts.SplitLineOpts(is_show=True), name='KB/2S' ) ) .set_global_opts( title_opts=opts.TitleOpts( title="磁盘IO", pos_left="center", pos_top="top", ), tooltip_opts=opts.TooltipOpts(trigger="axis", axis_pointer_type="cross"), legend_opts=opts.LegendOpts(pos_left="left"), xaxis_opts=opts.AxisOpts(type_="category", boundary_gap=False), yaxis_opts=opts.AxisOpts( type_="value", name='KB/2S'), ) .set_series_opts( axisline_opts=opts.AxisLineOpts, ) )
 return total, used, free, c
@app.route("/disk")def get_disk_chart: total, used, free, c = disk_line return jsonify({'total': total, 'used': used, 'free': free, 'line': c.dump_options_with_quotes})

示例结果

网卡

通过 psutil 获取网络接口和网络连接的信息

# 获取网络字节数和包的个数 发送的字节数/收到的字节数/发送的包数/收到的包数>>> psutil.net_io_counterssnetio(bytes_sent=9257984, bytes_recv=231398400, packets_sent=93319, packets_recv=189501, errin=0, errout=0, dropin=0, dropout=0)
# 获取当前的网络连接 注意：net_connections 需要用管理员权限运行 Python 文件>>> psutil.net_connections[sconn(fd=6, family=<AddressFamily.AF_INET: 2>, type=<SocketKind.SOCK_STREAM: 1>, laddr=addr(ip='192.168.5.31', port=50541), raddr=addr(ip='17.248.159.145', port=443), status='ESTABLISHED', pid=1897), sconn(fd=12, family=<AddressFamily.AF_INET: 2>, type=<SocketKind.SOCK_STREAM: 1>, laddr=addr(ip='192.168.5.31', port=50543), raddr=addr(ip='17.250.120.9', port=443), status='ESTABLISHED', pid=1897), sconn(fd=6, family=<AddressFamily.AF_INET: 2>, type=<SocketKind.SOCK_DGRAM: 2>, laddr=addr(ip='0.0.0.0', port=0), raddr=(), status='NONE', pid=1790),sconn(fd=10, family=<AddressFamily.AF_INET: 2>, type=<SocketKind.SOCK_DGRAM: 2>, laddr=addr(ip='0.0.0.0', port=0), raddr=(), status='NONE', pid=1790),sconn(fd=11, family=<AddressFamily.AF_INET: 2>, type=<SocketKind.SOCK_DGRAM: 2>, laddr=addr(ip='0.0.0.0', port=0), raddr=(), status='NONE', pid=1790),...sconn(fd=30, family=<AddressFamily.AF_INET: 2>, type=<SocketKind.SOCK_DGRAM: 2>, laddr=addr(ip='0.0.0.0', port=137), raddr=(), status='NONE', pid=1),sconn(fd=31, family=<AddressFamily.AF_INET: 2>, type=<SocketKind.SOCK_DGRAM: 2>, laddr=addr(ip='0.0.0.0', port=138), raddr=(), status='NONE', pid=1)]
# 获取网络接口信息>>> psutil.net_if_addrs{'lo0': [snicaddr(family=<AddressFamily.AF_INET: 2>, address='127.0.0.1', netmask='255.0.0.0', broadcast=None, ptp=None), snicaddr(family=<AddressFamily.AF_INET6: 30>, address='::1', netmask='ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff', broadcast=None, ptp=None), snicaddr(family=<AddressFamily.AF_INET6: 30>, address='fe80::1%lo0', netmask='ffff:ffff:ffff:ffff::', broadcast=None, ptp=None)], ..., 'utun1': [snicaddr(family=<AddressFamily.AF_INET6: 30>, address='fe80::b519:e5df:2bd4:857e%utun1', netmask='ffff:ffff:ffff:ffff::', broadcast=None, ptp=None)]}
# 获取网络接口的状态>>> psutil.net_if_stats{'lo0': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_UNKNOWN: 0>, speed=0, mtu=16384), ...'utun1': snicstats(isup=True, duplex=<NicDuplex.NIC_DUPLEX_UNKNOWN: 0>, speed=0, mtu=2000)}

在监控平台上每 2 秒请求 url 获取网卡IO，并动态显示图表

net_io_dict = {'net_io_time':, 'net_io_sent': , 'net_io_recv': , 'pre_sent': 0, 'pre_recv': 0, 'len': -1}def net_io: now = time.strftime('%H:%M:%S', time.localtime(time.time)) # 获取网络信息 count = psutil.net_io_counters g_sent = count.bytes_sent g_recv = count.bytes_recv
 # 第一次请求 if net_io_dict['len'] == -1: net_io_dict['pre_sent'] = g_sent net_io_dict['pre_recv'] = g_recv net_io_dict['len'] = 0 return
 # 当前网络发送/接收的字节速率 = 现在网络发送/接收的总字节 - 前一次请求网络发送/接收的总字节 net_io_dict['net_io_sent'].append(g_sent - net_io_dict['pre_sent']) net_io_dict['net_io_recv'].append(g_recv - net_io_dict['pre_recv']) net_io_dict['net_io_time'].append(now) net_io_dict['len'] = net_io_dict['len'] + 1
 net_io_dict['pre_sent'] = g_sent net_io_dict['pre_recv'] = g_recv
 # 保持在图表中 10 个数据 if net_io_dict['len'] == 11: net_io_dict['net_io_sent'].pop(0) net_io_dict['net_io_recv'].pop(0) net_io_dict['net_io_time'].pop(0) net_io_dict['len'] = net_io_dict['len'] - 1

def net_io_line -> Line: net_io
 c = ( Line .add_xaxis(net_io_dict['net_io_time']) .add_yaxis("发送字节数", net_io_dict['net_io_sent'], is_smooth=True) .add_yaxis("接收字节数", net_io_dict['net_io_recv'], is_smooth=True) .set_series_opts( areastyle_opts=opts.AreaStyleOpts(opacity=0.5), label_opts=opts.LabelOpts(is_show=False), ) .set_global_opts( title_opts=opts.TitleOpts(title="网卡IO/2秒"), xaxis_opts=opts.AxisOpts( axistick_opts=opts.AxisTickOpts(is_align_with_label=True), is_scale=False, boundary_gap=False, ), )) return c
@app.route("/netio")def get_net_io_chart: c = net_io_line return c.dump_options_with_quotes

示例结果

进程

通过 psutil 可以获取所有进程的信息

# 所有进程的 pid>>> psutil.pids[0, 1, 134, 135, 138, 139, 140, 141, 144, 145, 147, 152, ..., 30400, 97792]
# 单个进程>>> p = psutil.Process(30400)
# 名称>>> p.name'pycharm'
# 使用内存负载>>> p.memory_percent12.838459014892578
# 启动时间>>> p.create_time1587029962.493182
# 路径>>> p.exe'/Applications/PyCharm.app/Contents/MacOS/pycharm'
# 状态>>> p.status'running'
# 用户名>>> p.username'imeng'
# 内存信息>>> p.memory_infopmem(rss=1093005312, vms=9914318848, pfaults=7813313, pageins=8448)

列出所有不需要权限的进程

def process: result =  process_list =  pid = psutil.pids for k, i in enumerate(pid): try: proc = psutil.Process(i) ctime = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(proc.create_time)) process_list.append((str(i), proc.name, proc.cpu_percent, proc.memory_percent, ctime)) except psutil.AccessDenied: # 需要管理员权限 pass except psutil.NoSuchProcess: pass except SystemError: pass # 按负载排序 process_list.sort(key=process_sort, reverse=True)
 for i in process_list: result.append({'PID': i[0], 'name': i[1], 'cpu': i[2], 'mem': "%.2f%%"%i[3], 'ctime': i[4]})
 return jsonify({'list', result})
def process_sort(elem): return elem[3]
@app.route("/process")def get_process_tab: c = process return c
@app.route("/delprocess")def del_process: pid = request.args.get("pid") os.kill(int(pid), signal.SIGKILL) return jsonify({'status': 'OK'})