cmdb第二天

要点:

import importlib
import traceback

from lib.config.settings import settings


##插件管理类
class PluginsManager():
    def __init__(self, hostname=None):
        self.pluginSettings = settings.PLUGINS_DICT
        self.mode = settings.MODE
        self.hostname = hostname
        self.debug = settings.DEBUG

        if self.mode == 'ssh':
            self.ssh_port = settings.SSH_PORT
            self.ssh_username = settings.SSH_USERNAME
            self.ssh_pwd = settings.SSH_PWD
            self.ssh_hostname = settings.SSH_HOSTNAME

    def execute(self):
        # 1. 获取配置
        # 2. 循环执行
        response = {}

        #获取PLUGINS_DICT这个字典的 key与 values的值
        for k,v  in self.pluginSettings.items():
            ret = {'code': 1000, 'data': None}
            try:
                #k:basic  v: src.plugins.basic.Basic
                module_name , class_name = v.rsplit('.',1)
                #因为得到的是字符串,吧字符串当作模块导入
                m = importlib.import_module(module_name)
                cls = getattr(m,class_name)
                res = cls().process(self.command, self.debug)
                ret['data'] =res

                response[k]=ret
            except Exception as e:
                ret['code'] =1001
                #注意traceback模块可以直接显示报错的位置和内容,更直观
                ret['data'] ="[%s] 模式下的主机 [%s] 采集[%s]出错,出错信息是:[%s]" % (self.mode, self.hostname if self.hostname else 'agent', k, traceback.format_exc())
                response[k] = ret
        return  response


    def command(self,cmd):
        if self.mode == 'agent':
            return  self.__agent(cmd)
        elif self.mode == 'ssh':
            return  self.__ssh(cmd)
        elif self.mode == 'salt':
            return self.__salt(cmd)
        else:
            return '只支持采集模式为:agent/ssh/salt模式'

    def __agent(self,cmd):
        import  subprocess
        res = subprocess.getoutput(cmd)
        return  res


    def __ssh(self,cmd):
        import  paramiko
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        ssh.connect(hostname=self.ssh_hostname,port=self.ssh_port,username=self.ssh_username, password=self.ssh_pwd)
        stdin, stdount, stderr = ssh.exec_command(cmd)
        result = stdount.read()
        ssh.close()
        return  result

    def __salt(self,cmd):
        import  subprocess
        res_cmd = "salt '%s' cmd.run '%s'" %(self.hostname,cmd)
        res = subprocess.getoutput(res_cmd)
        return  res

class Basic(object):
    def __init__(self):
        pass

    
    #这里执行就是__init__文件内的 res = cls().process(self.command, self.debug)
    #其实就是运行了 Basci().process方法
    def process(self,command_func,debug):
        if debug:
            output = {
                'os_platform': 'linux',
                'os_version': 'CentOS release 6.6 (Final)
Kernel 
 on an m',
                'hostname': 'nod1.com'
            }

        else:
            output = {
                'os_platform': command_func("uname").strip(),
                'os_version': command_func("cat /etc/issue").strip().split('
')[0],
                'hostname': command_func("hostname").strip(),
            }

        return output

import os
from  lib.config.settings import settings

class Board(object):
    def __init__(self):
        pass
    @classmethod
    def initial(cls):
        return cls()

    def process(self,command_func,debug):
        if debug:
            output = open(os.path.join(settings.BASEDIR, 'files/board.out'), 'r',encoding='utf-8').read()

        else:
            output = command_func("sudo dmidecode -t1")
        return  self.parse(output)

    def parse(self,content):
        result ={}
        key_map = {
            'Manufacturer': 'manufacturer',
            'Product Name': 'model',
            'Serial Number': 'sn',
        }

        for item in content.split('
'):
            #进行切片,成为列表形式
            row_data = item.strip().split(':')
            #过滤,显示想要的,当列表中有2个值说明是我们想要的
            if len(row_data) ==2:
                #如果索引1的key值是在key_map中,进行过滤
                if row_data[0] in key_map:
                    result[key_map[row_data[0]]] = row_data[1].strip() if row_data[1] else row_data[1]

        return  result