day02-业务服务监控

提供大量第三方工具，可以开发企业级服务监控平台，本章涉及文件与目录差异对比、HTTP质量监控、邮件告警等内容
一、文件内容差异比对
1、示例1

d = difflib.Differ()
diff = d.compare(text1_lines, text2_lines)
print('\n'.join(list(diff)))

2、示例2

import difflib
text1 = """text1:"""
text1_lines = text1.splitlines()
text2 = """text2:"""
text2_lines = text2.splitlines()
d = difflib.HtmlDiff()
print(d.make_file(text1_lines, text2_lines))

运行 python  a.py > a.html

3、比较两个文件

import difflib
import sys
try:
    textfile1=sys.argv[1]
    textfile2=sys.argv[2]
except Exception,e:
    print "Error:"+str(e)
    print "Usage: simple3.py filename1 filename2"
    sys.exit()
def readfile(filename):
    try:
        fileHandle = open (filename, 'rb' )
        text=fileHandle.read().splitlines()
        fileHandle.close()
        return text
    except IOError as error:
       print('Read file Error:'+str(error))
       sys.exit()

if textfile1=="" or textfile2=="":
    print "Usage: simple3.py filename1 filename2"
    sys.exit()
text1_lines = readfile(textfile1)
text2_lines = readfile(textfile2) 

d = difflib.HtmlDiff()
print d.make_file(text1_lines, text2_lines)

运行方式， python  1.py  file1 file2 > a.html

使用场景，比较不同的配置文件差异

二、目录对比模块

可以参见博客  https://www.cnblogs.com/xiao1/p/6171064.html

#!/usr/bin/env python

import os, sys
import filecmp
import re
import shutil
holderlist=[]

def compareme(dir1, dir2):
    dircomp=filecmp.dircmp(dir1,dir2)
    only_in_one=dircomp.left_only
    diff_in_one=dircomp.diff_files
    dirpath=os.path.abspath(dir1)
    [holderlist.append(os.path.abspath( os.path.join(dir1,x) )) for x in only_in_one]
    [holderlist.append(os.path.abspath( os.path.join(dir1,x) )) for x in diff_in_one]
    if len(dircomp.common_dirs) > 0:
        for item in dircomp.common_dirs:
            compareme(os.path.abspath(os.path.join(dir1,item)), \
            os.path.abspath(os.path.join(dir2,item)))
        return holderlist

def main():
    if len(sys.argv) > 2:
        dir1=sys.argv[1]
        dir2=sys.argv[2]
    else:
        print("Usage: ", sys.argv[0], "datadir backupdir")
        sys.exit()

    source_files=compareme(dir1,dir2)
    dir1=os.path.abspath(dir1)

    if not dir2.endswith('/'): dir2=dir2+'/'
    dir2=os.path.abspath(dir2)
    destination_files=[]
    createdir_bool=False

    for item in source_files:
        destination_dir=re.sub(dir1, dir2, item)
        destination_files.append(destination_dir)
        if os.path.isdir(item):
            if not os.path.exists(destination_dir):
                os.makedirs(destination_dir)
                createdir_bool=True

    if createdir_bool:
        destination_files=[]
        source_files=[]
        source_files=compareme(dir1,dir2)
        for item in source_files:
            destination_dir=re.sub(dir1, dir2, item)
            destination_files.append(destination_dir)

    print("update item:")
    print(source_files) 

    copy_pair=zip(source_files,destination_files)
    for item in copy_pair:
        if os.path.isfile(item[0]):
            shutil.copyfile(item[0], item[1])

if __name__ == '__main__':
    main()

注：这个脚本如果改到windows下使用，要注意反斜杠 " \ " ,不过，生产环境下，基本上碰不到windows 下的场合

一般用来做数据备份的服务，基本上都是linux，并且rysnc那个软件用得比较多