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
