:maple_leaf: 基于Lua的Spring Cloud网关高可用通用Ngnix插件
:maple_leaf: 基于Lua的Spring Cloud网关高可用通用Ngnix插件
在Spring Cloud微服务架构体系中,我们往往会部署一个Zuul集群来横向扩展我们的微服务应用,集群的上层是Nginx软负载,在实际情况中,往往会遇到Zuul宕机的尴尬事情,这时候从Nginx到这台机器的请求就会全部失效。此项目针对此痛点,用lua脚本实现定时拉取特定服务地址,动态无感知增减Zuul在Nginx中的负载节点。
如果您希望实现从Nginx直接到普通服务的动态节点负载,在下文配置服务名与Eureka注册中心地址即可。
1、环境 yum -y install readline-devel pcre-devel openssl-devel gcc 2、下载解压OpenResty包 wget https://openresty.org/download/openresty-1.13.6.1.tar.gz tar -zxvf openresty-1.13.6.1.tar.gz 3、下载ngx_cache_purge模块,该模块用于清理nginx缓存 cd openresty-1.13.6.1/bundle wget http://labs.frickle.com/files/ngx_cache_purge-2.3.tar.gz tar -zxvf ngx_cache_purge-2.3.tar.gz 4、下载nginx_upstream_check_module模块,该模块用于upstream健康检查 wget https://github.com/yaoweibin/nginx_upstream_check_module/archive/v0.3.0.tar.gz tar -zxvf v0.3.0.tar.gz 5、OpenResty配置增加 cd openresty-1.13.6.1 ./configure --prefix=/usr/servers --with-http_realip_module --with-pcre --with-luajit --add-module=./bundle/ngx_cache_purge-2.3/ --add-module=./bundle/nginx_upstream_check_module-0.3.0/ -j2 6、编译安装 make make install7、OpenResty没有http模块,需要单独安装 cd /usr/servers/lualib/resty wget https://raw.githubusercontent.com/pintsized/lua-resty-http/master/lib/resty/http_headers.lua
wget https://raw.githubusercontent.com/pintsized/lua-resty-http/master/lib/resty/http.lua8、项目脚本拷贝到这里 copy dynamic_eureka_balancer.lua into this dir 9、Nginx配置文件 vim /usr/servers/nginx/conf/nginx.conf
http { #sharing cache area lua_shared_dict dynamic_eureka_balancer 128m;init_worker_by_lua_block { -- init eureka balancer local file = require "resty.dynamic_eureka_balancer" local balancer = file:new({dict_name="dynamic_eureka_balancer"}) --eureka server list balancer.set_eureka_service_url({"127.0.0.1:8888", "127.0.0.1:9999"}) --eureka basic authentication --use this setting if eureka has enabled basic authentication. --note: basic authentication must use BASE64 encryption in `user:password` format --balancer.set_eureka_service_basic_authentication("") --The service name that needs to be monitored balancer.watch_service({"zuul", "client"}) } upstream springcloud_cn { server 127.0.0.1:666; # Required, because empty upstream block is rejected by nginx (nginx+ can use 'zone' instead) balancer_by_lua_block { --The zuul name that needs to be monitored local service_name = "zuul" local file = require "resty.dynamic_eureka_balancer" local balancer = file:new({dict_name="dynamic_eureka_balancer"}) --balancer.ip_hash(service_name) --IP Hash LB balancer.round_robin(service_name) --Round Robin LB } } server { listen 80; server_name localhost; location / { proxy_pass http://springcloud_cn/; 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_set_header X-Forwarded-Proto $scheme; } error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } }
}