在微服务架构盛行的当下，做全链路压测的时候难免会遇到一些服务无法直接压测，我们可以通过自己搭建类似服务的方式来将mock掉对应的服务，如果这个服务本身QPS要求不高的话可能还好，比如笔者曾经用FastAPI搭建个mock服务器，测试下来QPS基本在1500-1800的样子。如果QPS要求更高，通过增加worker的方式其实效果不是太好，这时不妨试试使用openresty直接来搭建一个mock服务器。下面是具体的实测数据和相关配置教程：
测试数据
工具：wrk2，所在host为4CPU
服务器：使用openresty作为mock的http服务器，host为8CPU
测试指令：
wrk -t8 -c100 -d30 http://remotehost:8000/greet
结论：
- 使用openresty启动单个worker的情况下，QPS可以达到2W左右；
- 使用openresty启动八个worker的情况下，QPS可以达到7.5W左右；
Openresty配置
docker启动
# 直接用docker启服务了
docker run -d -v /mnt/nginx/conf/nginx.conf:/usr/local/openresty/nginx/conf/nginx.conf -v /mnt/nginx/conf.d/:/etc/nginx/conf.d/ -p 80:80 openresty/openresty:alpine
目录及配置
nginx/
|---conf
| |---nginx.conf
|---conf.d
|--default.conf
nginx.conf：
重点看worker_processes的配置
#user nobody;
worker_processes 8;
# Enables the use of JIT for regular expressions to speed-up their processing.
pcre_jit on;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
# Enables or disables the use of underscores in client request header fields.
# When the use of underscores is disabled, request header fields whose names contain underscores are marked as invalid and become subject to the ignore_invalid_headers directive.
# underscores_in_headers off;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_log logs/access.log main;
# Log in JSON Format
# log_format nginxlog_json escape=json '{ "timestamp": "$time_iso8601", '
# '"remote_addr": "$remote_addr", '
# '"body_bytes_sent": $body_bytes_sent, '
# '"request_time": $request_time, '
# '"response_status": $status, '
# '"request": "$request", '
# '"request_method": "$request_method", '
# '"host": "$host",'
# '"upstream_addr": "$upstream_addr",'
# '"http_x_forwarded_for": "$http_x_forwarded_for",'
# '"http_referrer": "$http_referer", '
# '"http_user_agent": "$http_user_agent", '
# '"http_version": "$server_protocol", '
# '"nginx_access": true }';
# access_log /dev/stdout nginxlog_json;
# See Move default writable paths to a dedicated directory (#119)
# https://github.com/openresty/docker-openresty/issues/119
client_body_temp_path /var/run/openresty/nginx-client-body;
proxy_temp_path /var/run/openresty/nginx-proxy;
fastcgi_temp_path /var/run/openresty/nginx-fastcgi;
uwsgi_temp_path /var/run/openresty/nginx-uwsgi;
scgi_temp_path /var/run/openresty/nginx-scgi;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
include /etc/nginx/conf.d/*.conf;
# Don't reveal OpenResty version to clients.
# server_tokens off;
}
default.conf:
重点看location /greet的配置
# worker_processes 8;
server {
listen 80;
server_name localhost;
access_log off;
#charset koi8-r;
#access_log /var/log/nginx/host.access.log main;
location / {
root /usr/local/openresty/nginx/html;
index index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/local/openresty/nginx/html;
}
location /content-test {
default_type text/html;
content_by_lua_block {
ngx.say('<html><body><p>Hello, world!</p></body></html>')
}
}
location /greet {
content_by_lua_block {
local json = require("cjson")
local data = { hello = "world", code = 0 }
ngx.header.content_type = "application/json"
ngx.say(json.encode(data))
}
}
}
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