精品案例

1、Nginx + lua +[memcached,redis]实现网站灰度发布 
2、分库分表/基于Leaf组件实现的全球唯一ID(非UUID)
3、Redis独立数据监控,实现订单超时操作/ MQ死信操作  Select Poll Epoll  Reactor模型
4、分布式任务调试Quartz应用 docker+k8s
5、Zookeeper+Kafka实战应用之流量削峰
6、基于Netty+WebSocket实现的聊天室 BIO NIO AIO Netty 基于事件驱动
7、分布式文件系统(HDFS|FastDFS)
8、OAuth2协议- 咚咚接口调用
9、基于Redis实现SSO单点登录
10、前后端分离之-Restful接口开发规范  10条规范 DRF django restframe workd

Nginx + lua +[memcached,redis]-实现网站灰度发布

lua脚本

js,python,dart,go 语法很相通，类似于Shell,强类型语言与弱类型语言

print("hello lua")

openresty安装，ump.jd.com

wget	https://openresty.org/download/ngx_openresty-1.9.3.2.tar.gz
tar	zxf	ngx_openresty-1.9.3.2.tar.gz
cd	ngx_openresty-1.9.3.2
./configure	--prefix=/soft/openresty --with-luajit	--with-http_stub_status_module	--with-pcre	--with-pcre-jit
make && make install

nginx配置

#user  nobody;
worker_processes 1;

#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;

  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;
  sendfile on;
  #tcp_nopush     on;

  #keepalive_timeout  0;
  keepalive_timeout 65;

  #gzip  on;

  upstream java_prod {
    server 192.168.23.164:8080;
  }

  upstream java_test {
    server 192.168.23.164:9090;
  }
  server {
    listen 80;
    server_name localhost;

    #charset koi8-r;

    #access_log  logs/host.access.log  main;
    location	/hello {
      default_type	text/html;
      content_by_lua_block {
        ngx.say("HelloWorld")
      }
    }


    location	/myip {
      default_type	\'text/plain\';
      content_by_lua	\'
      clientIP	=	ngx.req.get_headers()["x_forwarded_for"]
      ngx.say("Forwarded_IP:",clientIP)
      if	clientIP	==	nli	then
      clientIP	=	ngx.var.remote_addr
      ngx.say("Remote_IP:",clientIP)
      end
      \';
    }

    location	/ {
      default_type	\'text/plain\';
      content_by_lua_file	/soft/dep.lua;
    }

    location	@java_prod {
      proxy_pass	http://java_prod;
      include	proxy_params;
    }
    location	@java_test {
      proxy_pass	http://java_test;
      include	proxy_params;
    }
  }


  #error_page  404              /404.html;
  # redirect server error pages to the static page /50x.html
  #
  # proxy the PHP scripts to Apache listening on 127.0.0.1:80
  #
  #location ~ \.php$ {
  #    proxy_pass   http://127.0.0.1;
  #}
  # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
  #
  #location ~ \.php$ {
  #    root           html;
  #    fastcgi_pass   127.0.0.1:9000;
  #    fastcgi_index  index.php;
  #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
  #    include        fastcgi_params;
  #}
  # deny access to .htaccess files, if Apache\'s document root
  # concurs with nginx\'s one
  #
  #location ~ /\.ht {
  #    deny  all;
  #}
}


# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
#    listen       8000;
#    listen       somename:8080;
#    server_name  somename  alias  another.alias;
#    location / {
#        root   html;
#        index  index.html index.htm;
#    }
#}
# HTTPS server
#
#server {
#    listen       443 ssl;
#    server_name  localhost;
#    ssl_certificate      cert.pem;
#    ssl_certificate_key  cert.key;
#    ssl_session_cache    shared:SSL:1m;
#    ssl_session_timeout  5m;
#    ssl_ciphers  HIGH:!aNULL:!MD5;
#    ssl_prefer_server_ciphers  on;
#    location / {
#        root   html;
#        index  index.html index.htm;
#    }
#}

proxy_params

proxy_redirect  default;
proxy_set_header        Host    $http_host;
proxy_set_header        X-Real-IP       $remote_addr;
proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_connect_timeout   30;
proxy_send_timeout      60;
proxy_read_timeout      60;
proxy_buffer_size       32k;
proxy_buffering on;
proxy_buffers   4       128k;
proxy_busy_buffers_size 256k;
proxy_max_temp_file_size        256k;

memcache安装:

yum	install	memcached	-y
systemctl	start	memcached
systemctl	enable	memcached
key-value
telnet 192.168.23.164 11211
add
set
get
delete
stats
flush_all

lua脚本

--获取x-real-ip
clientIP	=	ngx.req.get_headers()["X-Real-IP"]
--如果IP为空-取x_forwarded_for
if	clientIP	==	nil	then
		clientIP	=	ngx.req.get_headers()["x_forwarded_for"]
end
--如果IP为空-取remote_addr
if	clientIP	==	nil	then
		clientIP	=	ngx.var.remote_addr
end
--定义本地,加载memcached
local	memcached	=	require	"resty.memcached"
--实例化对象
local	memc,	err	=	memcached:new()
--判断连接是否存在错误
if not	memc	then
		ngx.say("failed	to	instantiate	memc:	",	err)
		return
end
--建⽴memcache连接
local	ok,	err	=	memc:connect("127.0.0.1",	11211)
--⽆法连接往前端抛出错误信息
if not	ok	then
		ngx.say("failed	to	connect:	",	err)
		return
end
--获取对象中的ip-存在值赋给res
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
--如果值为1则调⽤local-@java_test
if	res	==	"1" then
	-- ngx.say("yes")
	ngx.exec("@java_test")
		return
end
--否则调⽤local-@java_prod
		ngx.exec("@java_prod")
	return

java与tomcat安装

yum	install	java  -y

tomcat准备