思路：读一行、写一行
global
log 127.0.0.1 local2
daemon
maxconn 256
log 127.0.0.1 local2 info
defaults
log global
mode http
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
option dontlognull
listen stats :8888
stats enable
stats uri /admin
stats auth admin:1234
frontend oldboy.org
bind 0.0.0.0:80
option httplog
option httpclose
option forwardfor
log global
acl www hdr_reg(host) -i www.oldboy.org
use_backend www.oldboy.org if www
backend www.oldboy.org
server 100.1.7.9 100.1.7.9 weight 20 maxconn 3000
backend buy.oldboy.org
server 100.1.7.90 100.1.7.90 weight 20 maxconn 3000
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#!/usr/bin/env python# -*- coding:utf-8 -*-def fetch(backend): result = [] with open(‘ha.conf‘, ‘r‘) as f: flag = False for line in f: if line.strip().startswith(‘backend‘) and line.strip() == "backend " + backend: flag = True continue if flag and line.strip().startswith(‘backend‘): break if flag and line.strip(): result.append(line.strip()) return resultdef add(backend, record): result = fetch(backend) if not result: # 无backend，无record pass else: # 有backend if record in result: # 记录record pass else: result.append(record) with open(‘ha.conf‘, ‘r‘) as old, open(‘new.conf‘, ‘w‘) as new: continue_flag = False for line in old: if line.strip().startswith(‘backend‘) and line.strip() == "backend " + backend: continue_flag = True new.write(line) for temp in result: new.write(" "*8 + temp + "\n") continue if continue_flag and line.strip().startswith(‘backend‘): continue_flag = False if continue_flag: pass else: new.write(line)def add2(backend, record): with open(‘ha.conf‘, ‘r‘) as old, open(‘new.conf‘, ‘w‘) as new: in_backend = False has_backend = False has_record = False for line in old: if line.strip().startswith(‘backend‘) and line.strip() == "backend " + backend: has_backend = True in_backend = True new.write(line) continue if in_backend and line.strip().startswith(‘backend‘): if not has_record: new.write(" "*8 + record + ‘\n‘) new.write(line) in_backend = False continue if in_backend and line.strip() == record: has_record = True new.write(line) continue if line.strip(): new.write(line) if not has_backend: # 写backend，写record new.write(‘backend ‘+ backend + ‘\n‘) new.write(‘ ‘*8 + record + ‘\n‘)# ret = fetch("www.oldboy.org")# print(ret)# add(‘www.oldboy.org‘, "server 100.1.7.10 100.1.7.10 weight 20 maxconn 3000")# add2(‘www.oldboy.org‘, "server 100.1.7.11 100.1.7.11 weight 20 maxconn 3000") |
原文：http://www.cnblogs.com/cp-miao/p/5617890.html