[nginx]-nginx 使用ngx_dynamic_upstream实现nginx动态负载

超、凢脫俗 2023-07-18 11:17 4阅读 0赞

# nginx 使用ngx\_dynamic\_upstream实现nginx动态负载 #

模块下载地址

https://github.com/cubicdaiya/ngx\_dynamic\_upstream

主要功能 实现了修改upstream权重 可以不需要重载nginx配置 即不需要reload

这里 因为想测试多种方式 所以安装了很多包

开始操作 不多bb

##### 首先安装nginx #####

# 需要安装pcre依赖库
    yum install readline-devel pcre-devel openssl-devel unzip -y
    yum -y install gcc gcc-c++ autoconf automake make
    yum -y install zlib zlib-devel openssl openssl-devel pcre pcre-devel
    yum -y install GeoIP GeoIP-devel GeoIP-data
    yum -y install perl-devel perl-ExtUtils-Embed
    
    # 下载nginx1.12
    cd /opt/
    wget http://nginx.org/download/nginx-1.12.2.tar.gz
    tar -zxvf nginx-1.12.2.tar.gz
    
    
    
    # 先安装LuaJIT，并依赖ngx_devel_kit。
    wget http://luajit.org/download/LuaJIT-2.0.5.tar.gz
    tar -zxvf  LuaJIT-2.0.5.tar.gz
    cd LuaJIT-2.0.5
    make install PREFIX=/usr/local/LuaJIT
    
    cat >> /etc/profile<<EOF export LUAJIT_LIB=/usr/local/LuaJIT/lib export LUAJIT_INC=/usr/local/LuaJIT/include/luajit-2.0 EOF
    
    
    
    # 安装ngx_devel_kit
    cd /opt/
    wget https://github.com/simplresty/ngx_devel_kit/archive/v0.3.0.tar.gz
    tar zxvf v0.3.0.tar.gz
    
    ls | grep ngx_devel_kit
    
    # 安装lua-nginx-module
    cd /opt/
    wget https://github.com/openresty/lua-nginx-module/archive/v0.10.13.tar.gz
    tar zxvf v0.10.13.tar.gz
    
    ls | grep lua-nginx
    
    # 下载ngx_http_dyups_module
    wget https://github.com/yzprofile/ngx_http_dyups_module/archive/master.zip -O  ngx_http_dyups_module-master.zip
    unzip ngx_http_dyups_module-master.zip
    # 下载unzip ngx_dynamic
    wget   https://github.com/cubicdaiya/ngx_dynamic_upstream/archive/master.zip -O ngx_dynamic_upstream-master.zip
    unzip ngx_dynamic_upstream-master.zip
    
    # 编译nginx1.12 lua可以不装 我这里还是装了
    source /etc/profile
    cd /opt/nginx-1.12.2
    #./configure --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_realip_module --with-http_sub_module --with-http_gzip_static_module --with-pcre --with-ld-opt=-Wl,-rpath,/usr/local/LuaJIT/lib --add-dynamic-module=/opt/ngx_devel_kit-0.3.0 --add-module=/opt/ngx_http_dyups_module-master --add-module=/opt/ngx_dynamic_upstream-master
    
    ./configure --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_realip_module --with-http_sub_module --with-http_gzip_static_module --with-pcre --with-ld-opt=-Wl,-rpath,/usr/local/LuaJIT/lib --add-dynamic-module=/opt/ngx_devel_kit-0.3.0 --add-dynamic-module=/opt/lua-nginx-module-0.10.13 --add-module=/opt/ngx_http_dyups_module-master --add-module=/opt/ngx_dynamic_upstream-master
    
    make -j2 && make install
    
    # 查看nginx 编译的模块
    nginx -V

##### 起2个tomcat 端口为80 和 90 #####

创建一下index.html 内容也为80和90

安装和创建过程略了

启动好tomcat之后 修改nginx配置如下 ip请自行修改为自己的ip或者localhost

#user  nobody;
    worker_processes  1;
    #error_log  logs/error.log;
    #error_log  logs/error.log  notice;
    #error_log  logs/error.log  info;
    #pid        logs/nginx.pid;
    load_module /usr/local/nginx/modules/ndk_http_module.so;
    load_module /usr/local/nginx/modules/ngx_http_lua_module.so;
    events {
        worker_connections  1024;
    }
    http {
        lua_package_path "$prefix/lua/?.lua;;";
        lua_code_cache on;
        limit_req_zone $binary_remote_addr zone=one:10m rate=1r/s;
        limit_conn_zone $binary_remote_addr zone=addr:10m;
    upstream backends {
        zone zone_for_backends 1m;
        server 192.168.10.83:80;
        server 192.168.10.83:90;
    }
    server {
        listen 8080;
        server_name localhost;
        location /dynamic {
    		allow 127.0.0.1;
    	    deny all;
            dynamic_upstream;
        }
        location / {
    	    proxy_pass http://backends;
        }
    }
    }

启动nginx 并请求一下nginx 负载情况

![format_png][]

查看dynamic的请求限制 限制有生效

![format_png 1][]

在192.168.10.83 本机上执行 命令

down 一台 并查看 是否会修改配置文件。证明该模块并不会更改配置文件 ，nginx 重启或者reload之后就会恢复原样

![format_png 2][]

测试请求情况

![format_png 3][]

重新把机子 加入upstream 去掉down状态

![format_png 4][]

nginx 进程号从头到位没变过 说明没有进行过reload操作

![format_png 5][]

添加和删除 请参考博客

参考博客

https://blog.51cto.com/qiangsh/2021399

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