nginx 火焰图分析

主要是简单的学习，基于了openresty 开启了debug，同时保留构建的符号表信息

构建命令

只包含核心部分，其他的具体参考gihtub

    --with-debug \

    --with-cc-opt='-O0 -g' \

容器集成使用

• nginx 配置使用了单进程模式

worker_processes  1;

user root;  

master_process off;

events {

    worker_connections  1024;

}

http {

    include       mime.types;

    default_type  application/octet-stream;

    sendfile        on;

    root html;

    keepalive_timeout  65;

    gzip  on;

    upstream cluster1 {

        # simple round-robin

        server app2:80;

        server app3:80;

        check interval=1000 rise=2 fall=5 timeout=1000 type=http;

        check_http_send "HEAD / HTTP/1.0\r\n\r\n";

        check_http_expect_alive http_2xx http_3xx;

    }  

     upstream cluster2 {

        # simple round-robin

        server app2:80;

        server app3:80;

        check interval=1000 rise=2 fall=5 timeout=1000 type=http;

        check_http_send "HEAD / HTTP/1.0\r\n\r\n";

        check_http_expect_alive http_2xx http_3xx;

    } 

    server {

        listen       81;

        server_name  localhost;

        charset utf-8;

        default_type text/html;

        location / {

            index index.html;

        }

        location /status {

            healthcheck_status;

        }

        location /app.html {

            root html;

        }

        location /css/ {

            trim on;

            trim_js on;

            trim_css on;

            concat on;

            concat_max_files 20;

        }

        error_page   500 502 503 504  /50x.html;

        location = /50x.html {

            root   html;

        }    

    }

    server {

        listen       80;

        server_name  localhost;

        charset utf-8;

        default_type text/html;

        location / {

            proxy_set_header Host $http_host;

            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for; 

            client_body_buffer_size 10M;

            client_max_body_size 10G;

            proxy_buffers 1024 4k;

            proxy_read_timeout 300;

            proxy_connect_timeout 80;

            proxy_pass http://cluster1;

            footer "<!-- dalong demo-->";  

        }

        location /status {

            healthcheck_status;

        }

        location /app.html {

            root html;

        }

        location /css/ {

            trim on;

            trim_js on;

            trim_css on;

            concat on;

            concat_max_files 20;

        }

        error_page   500 502 503 504  /50x.html;

        location = /50x.html {

            root   html;

        }    

    }    

}

• 集成perf 的镜像

FROM dalongrong/openresty-tengine:debug

RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories && apk update && apk upgrade

RUN apk add --no-cache perf

• docker-compose 集成

version: '3'

services:

  app:

    build: ./

    volumes:

      - "./nginx.conf:/usr/local/openresty/nginx/conf/nginx.conf"

      - "./css/:/usr/local/openresty/nginx/html/"

    privileged: true

    cap_add:

       - ALL

    ports:

      - "80:80"

      - "81:81"

  app2:

    image: dalongrong/openresty-tengine:latest

  app3:

    image: dalongrong/openresty-tengine:latest

perf 集成

• 预备
  进入容器

 

sh -c " echo 0 > /proc/sys/kernel/kptr_restrict"

perf record -ag -F 99 1

• 执行压测

ab -n 20000 -c 100 http://localhost/

ab -n 20000 -c 100 http://localhost/status

• 生成perf 内容

perf script --header > nginx.perf

• 使用flamescope 查看火焰图

 

 

• 参考效果

 

 

说明

相关测试perf 我已经push 到github 了，可以参考学习

参考资料

https://github.com/rongfengliang/openresty-tengine-docker/blob/master/alpine/Dockerfile-debug
https://docs.nginx.com/nginx/admin-guide/monitoring/debugging/
https://www.cnblogs.com/rongfengliang/p/11350847.html
https://github.com/Netflix/flamescope
https://github.com/rongfengliang/openresty-perf