18. Nginx release and gray Lua

Install memcached

yum install -y memcached
#启动memcached服务，端口11211，以nobody身份启动，-d后台模式运行
memcached -p11211 -u nobody -d
#将自己的IP设为灰度测试的IP
telnet 127.0.0.1 11211
set 119.32.216.122 0 0 1
1
quit

Install memcached for lua

wget https://github.com/openresty/lua-resty-memcached/archive/v0.11.tar.gz
tar -zxvf v0.11.tar.gz
mkdir -p /usr/local/share/lua/5.1
cp -r lua-resty-memcached-0.11/lib/resty /usr/local/share/lua/5.1

Create a file test.lua

clientIP=ngx.req.get_headers()["X-Real-IP"]
if clientIP == nil then
    clientIP=ngx.req.get_headers()["x_forwarded_for"]
end
if clientIP == nil then
    clientIP=ngx.var.remote_addr
end
    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 will 119.32.216.122this added to the IP memcached, so the access http://www.siguoya.name:8867/time to see the content that is test
after and open global agency, found that what you see is product, so to achieve the effect of the gradation test for some users

Read topics

• 1. Nginx advantage
• 2. Nginx installation and boot from Kai
• 3. Nginx configuration syntax and directories
• 4. Nginx module
• 5. Nginx handling the static resources
• 6. Nginx browser cache principle
• 7. Cross-domain access resources Nginx
• Anti-theft chain 8. Nginx resources
• 9. Nginx proxy
• 10. Nginx Load Balancing
• 11. Nginx cache
• 12. Nginx static and dynamic separation
• 13. Nginx Rewrite
• 14. Nginx Secure Link
• 15. Nginx Geo
• 16. Nginx HTTPS service
• 17. Nginx and development of Lua
• 18. Nginx release and gray Lua
• 19. Nginx common errors
• 20. Nginx performance optimization
• 21. Nginx Security Management