psutil库的简单应用

参考

为Logstash提供日志

使用 psutil 模块获取系统的CPU、内存和硬盘信息，通过 TCP 或 UDP 的方式传递给 Logstash，测试代码如下：

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import psutil
import socket
import gevent
import time

IP = 'YourServerIP'
PORT = 5000
TIMES = 3


def getlog():
    cts = psutil.cpu_times()
    mem = psutil.virtual_memory()
    disk = psutil.disk_usage('c:')
    cpulog = dict(cpu = dict(user = cts.user, system = cts.system, idle = cts.idle))
    memlog = dict(memory= dict(total = mem.total, available = mem.available, percent = mem.percent, used = mem.used, free = mem.free))
    disklog = dict(disk = dict(total= disk.total, used = disk.used, free = disk.free, percent = disk.percent))
    import json
    return json.dumps(cpulog), json.dumps(memlog), json.dumps(disklog)


def f(log):
    try:
        s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
        s.sendto(log,(IP,PORT))
        s.close()
    except:
        pass

if __name__ == '__main__':
    while True:
        cpulog, memlog, disklog = getlog()
        gevent.spawn(f, cpulog).join()
        gevent.spawn(f, memlog).join()
        gevent.spawn(f, disklog).join()
        print 'send log!'
        time.sleep(TIMES)

在 Logstash 中，需要修改配置文件如下：

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input {
    udp {
        port => 5000
    }
}

filter {
    json {
        source => "message"
	target => "jsoncontent"
    }
}

output {
    stdout { codec => rubydebug
    }  
}

运行 Logstash：

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bin/logstash -f udpInput.conf

同时运行 测试代码 ，查看 Logstash 控制台，输出以下内容：

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{
        "message" => "{\"cpu\": {\"idle\": 153216.078125, \"system\": 3585.875, \"user\": 4711.96337890625}}",
       "@version" => "1",
     "@timestamp" => "2015-07-08T02:54:01.773Z",
           "host" => "192.168.3.15",
    "jsoncontent" => {
        "cpu" => {
              "idle" => 153216.078125,
            "system" => 3585.875,
              "user" => 4711.96337890625
        }
    }
}
{
        "message" => "{\"memory\": {\"available\": 1295798272, \"total\": 8526020608, \"percent\": 84.8, \"free\": 1295798272, \"used\": 7230222336}}",
       "@version" => "1",
     "@timestamp" => "2015-07-08T02:54:01.773Z",
           "host" => "192.168.3.15",
    "jsoncontent" => {
        "memory" => {
            "available" => 1295798272,
                "total" => 8526020608,
              "percent" => 84.8,
                 "free" => 1295798272,
                 "used" => 7230222336
        }
    }
}
{
        "message" => "{\"disk\": {\"total\": 64424505344, \"percent\": 75.4, \"free\": 15828262912, \"used\": 48596242432}}",
       "@version" => "1",
     "@timestamp" => "2015-07-08T02:54:01.774Z",
           "host" => "192.168.3.15",
    "jsoncontent" => {
        "disk" => {
              "total" => 64424505344,
            "percent" => 75.4,
               "free" => 15828262912,
               "used" => 48596242432
        }
    }
}
...

基于psutil的开源系统

在psutil模块的介绍中，提供了三个使用psutil实现的 Example applications。尝试使用了glances和psdash，对于一般系统监控，可以任选其一，关于它们的介绍可以参考以下连接：

tag:

    缺失模块。
    1、请确保node版本大于6.2
    2、在博客根目录（注意不是yilia根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    3、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: false
      raw: false
      content: false
      slug: false
      updated: false
      comments: false
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

那年二十七