flask+uwsgi+openresty(nginx)+linux服务部署---实现负载均衡

一、OpenResty安装

　　官网下载相应版本源码包：http://openresty.org/en/download.html

#准备编译环境
yum install pcre-devel openssl-devel gcc curl（centos）
apt-get install libpcre3-dev libssl-dev perl make build-essential curl （Ubuntu）

#编译安装
wget https://openresty.org/download/openresty-1.15.8.3.tar.gz
tar -xvf openresty-VERSION.tar.gz
cd openresty-VERSION/
./configure 
make 
sudo make install

#添加环境变量
vim ~/.bashrc
export PATH=/usr/local/openresty/bin:$PATH
source ~/.bashrc

　　测试

resty -e 'print("hello, world")'

　　启动/停止/重启服务命令(热加载)

#同样添加nginx环境变量
export PATH=/usr/local/openresty/nginx/sbin:$PATH

#启动服务
nginx

#停止服务
nginx -s stop

#热加载
nginx -s reload

 

 二、部署flask程序，使用uwsgi启动

　　编辑一个最简单的flask程序

　　app.py

from flask import Flask
app = Flask(__name__)

@app.route('/test')
def index():
        return "Hello World！！！"

　　编辑uwsgi.init

[uwsgi]
chdir=./
wsgi-file=app.py
callable=app
master=true
processes=1
threads=1
socket=127.0.0.1:8081
http-keepalive = 1
add-header=Connection: Keep-Alive
vacuum=true
pidfile=%(chdir)/openresty.pid
uid=root
gid=root
procname-prefix-spaced=openresty
logto = ./uwsgi.log
chmod-socket = 660
socket-timeout = 600
lazy-apps = true
need-app = true
worker-reload-mercy=2
reload-mercy=2

#相应字段自己修改

　　使用uwsgi启动程序

#安装uwsgi
pip install uwsgi

#通过uwsgi.init配置文件启动
nohup uwsgi --ini uwsgi.ini

#查看进程
ps -ef | grep uWSGI

#测试服务
curl http://localhost:8081/test  #Hello World！！！

 

三、配置nginx

配置/usr/local/openresty/nginx/conf目录下配置文件

nginx.conf

worker_processes auto;
worker_cpu_affinity auto;

error_log  logs/error.log  info;

pid        logs/nginx.pid;

events {
    worker_connections  10240;
}


http {
    include       mime.types;
    #default_type  application/octet-stream;
    default_type  text/html;

　　 #设置日志格式
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for" "$upstream_addr" '
                      '$upstream_response_time $request_time'

    access_log  logs/access.log  main;

    sendfile        on;

    keepalive_timeout  65;

    #gzip  on;
    client_max_body_size 6m;
    client_body_buffer_size 6m;

    include conf.d/openresty.conf;
}

　　创建conf.d/openresty.conf

upstream openresty_server_backend {
    server 127.0.0.1:8081;
    server 127.0.0.1:8082;    #转发多套后台服务
    #check interval=2000 rise=2 fall=2 timeout=1000 type=http;
    #check_http_send "HEAD /check.do HTTP/1.1\r\n\r\n";
    keepalive 32;
}

server {
    listen       8080; # 用于外网访问的nginx端口号
    server_name  localhost;

    location / {
        proxy_pass http://openresty_server_backend;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_connect_timeout 3s;
        proxy_read_timeout 3s;
        proxy_send_timeout 3s;
        proxy_buffer_size 3m;
        proxy_buffers 8  3m;
        proxy_set_header Host $host:$server_port;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
    }

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   html;
    }
}

　　配置完重启nginx

　　在/usr/local/openresty/nginx/logs路径下查看nginx日志