Implementation of grayscale release of Nginx and Lua
Install memcached
yum install -y memcached#Start memcached service, port 11211, start as nobody, -d background mode run memcached -p11211 -u nobody -d#Set IP to greyscale IPtelnet 127.0.0.1 11211set 119.32.216.122 0 0 11quit
Install memcached for lua
wget https://github.com/openresty/lua-resty-memcached/archive/v0.11.tar.gztar -zxvf v0.11.tar.gzmkdir -p /usr/local/share/lua/5.1cp -r lua-resty-memcached-0.11/lib/resty /usr/local/share/lua/5.1
Create test.lua file
clientIP=ngx.req.get_headers()["X-Real-IP"]if clientIP == nil then clientIP=ngx.req.get_headers()["x_forwarded_for"]endif clientIP == nil then clientIP=ngx.var.remote_addrend local memcached=require "resty.memcached" local memc,err=memcached:new() if not memc then ngx.say("failed to instantiate memc:",err) return end local ok,err =memc:connect("127.0.0.1",11211) if not ok then ngx.say("failed to connect:",err) return end local res,flags,err =memc:get(clientIP) --ngx.say("value key: ",res,clientIP) if err then ngx.say("failed to get clientIP",err) return end if res == "1" then ngx.exec("@server_test") return end ngx.exec("@server_product")
nginx configuration
server { listen 8867; server_name www.siguoya.name; root /usr/local/nginx/1.12.1/html; location / { content_by_lua_file /etc/nginx/test.lua; } location /hello { default_type text/plain; content_by_lua 'ngx.say("hello lua")'; } location /ua { default_type text/plain; content_by_lua ' clientIP=ngx.req.get_headers()["USER-AGENT"] ngx.say("IP:",clientIP) '; } location @server_product { default_type text/plain; return 200 'product'; } location @server_test { default_type text/plain; return 200 'test'; } }
Since we added the IP www.example.com to memcached, when visiting http://www.siguoya.name:8867/, what we see is test. 119.32.216.122
After the global proxy is turned on, it is found that the content you see is product, which achieves the effect of gray scale testing for some users.
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