1.安装flask
pip install flask
2.安装gevent
pip install gevent
3.安装gunicorn
pip install gunicorn
版本信息例如以下：
[root@rs-2 ~]# pip list
Flask (0.10.1)
gevent (1.0.1)
greenlet (0.4.2)
gunicorn (18.0)
pip (1.5.5)
setuptools (3.6)
4.安装nginx
下载源代码包安装，版本号信息例如以下
[root@rs-2 sbin]# ./nginx -v
nginx version: nginx/1.7.0
5.nginx配置反向代理
listen 80;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
try_files @uri @pp;
}
location @pp {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_pass http://127.0.0.1:5000;
}
全部请求转发到gunicorn监听的5000上。
6.gunicorn配置
[root@rs-2 pythonTest]# cat gun.conf
import os
bind='127.0.0.1:5000'
workers=4
backlog=2048
worker_class="gevent" #sync, gevent,meinheld
debug=True
proc_name='gunicorn.pid'
pidfile='/var/log/gunicorn/debug.log'
loglevel='debug'
[root@rs-2 pythonTest]#
7.測试脚本编写
[root@rs-2 pythonTest]# cat run_test.py
from flask import Flask
from flask import render_template_string import os from werkzeug.contrib.fixers import ProxyFix app = Flask(__name__) @app.route("/")
def index():
return "Hello World" app.wsgi_app = ProxyFix(app.wsgi_app)
if __name__ == "__main__":
app.run()
8.启动脚本
[root@rs-2 pythonTest]# gunicorn -c gun.conf run_test:app
看到例如以下部分输入
2014-05-12 10:29:41 [30260] [INFO] Listening at: http://127.0.0.1:5000 (30260)
2014-05-12 10:29:41 [30260] [INFO] Using worker: gevent
2014-05-12 10:29:41 [30265] [INFO] Booting worker with pid: 30265
2014-05-12 10:29:41 [30266] [INFO] Booting worker with pid: 30266
2014-05-12 10:29:41 [30267] [INFO] Booting worker with pid: 30267
2014-05-12 10:29:41 [30268] [INFO] Booting worker with pid: 30268
监听本机的5000port，
工作模式为gevent，
开启4个进程
9.压力測试
在还有一台虚拟上进行用ab模拟并发请求
报错:apr_socket_recv: No route to host (113)
[root@rs-1 ~]# time ab -n 200 -c 200 http://172.16.3.92/
This is ApacheBench, Version 2.3 <$Revision: 1554214 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 172.16.3.92 (be patient)
apr_socket_recv: No route to host (113)
real 0m0.078s
user 0m0.021s
sys 0m0.046s
解决方法：关闭目标server的防火墙
[root@rs-2 pythonTest]# service iptables stop
Flushing firewall rules: [ OK ]
Setting chains to policy ACCEPT: filter [ OK ]
Unloading iptables modules: [ OK ]
ok, 这下能够压力測试了
[root@rs-1 ~]# time ab -n 2000 -c 200 http://172.16.3.92/
This is ApacheBench, Version 2.3 <$Revision: 1554214 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 172.16.3.92 (be patient)
Completed 200 requests
Completed 400 requests
Completed 600 requests
Completed 800 requests
Completed 1000 requests
Completed 1200 requests
Completed 1400 requests
Completed 1600 requests
Completed 1800 requests
Completed 2000 requests
Finished 2000 requests
Server Software: nginx/1.7.0
Server Hostname: 172.16.3.92
Server Port: 80
Document Path: /
Document Length: 11 bytes
Concurrency Level: 200
Time taken for tests: 16.273 seconds
Complete requests: 2000
Failed requests: 0
Total transferred: 334000 bytes
HTML transferred: 22000 bytes
Requests per second: 122.90 [#/sec] (mean)
Time per request: 1627.313 [ms] (mean)
Time per request: 8.137 [ms] (mean, across all concurrent requests)
Transfer rate: 20.04 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 40 486.7 1 8992
Processing: 276 1032 250.5 1028 6300
Waiting: 273 1032 250.5 1027 6300
Total: 283 1072 618.1 1029 15292
Percentage of the requests served within a certain time (ms)
50% 1029
66% 1055
75% 1074
80% 1096
90% 1210
95% 1245
98% 1361
99% 2416
100% 15292 (longest request)
real 0m16.316s
user 0m0.598s
sys 0m1.447s