通過URL參數請求不同的後端服務器
阿新 • • 發佈:2019-05-09
配置 ade pro lua _for temp lse 如果 fault 內網通過K8S搭建多個分支測試環境,可是如果外網需要訪問而且域名都是一致的情況下,這個時候變得麻煩了。如何通過不同的請求參數訪問不同的後端環境呢,答案是可以的,通過lua可以達到。
curl --header "envs:branchesv2" http://fengwan.blog.51cto.com
入口:
http://fengwan.blog.51cto.com/?envs=branches #branches環境
http://fengwan.blog.51cto.com/?envs=branchesv2 #branchesv2環境
另外考慮到APP請求的時候無法通過參數來處理,我們可以添加統一的請求header: envs
curl --header "envs:branches" http://fengwan.blog.51cto.com
我們通過Openresty判斷頭部然後選擇不同的後端環境
Nginx配置:
upstream branches { server 10.254.220.47:80; } upstream branchesv2 { server 10.254.60.225:80; } upstream default { server 10.254.220.47:80; } server { listen 80; server_name fengwan.blog.51cto.com; location / { lua_code_cache on; set $upstreamhost ""; rewrite_by_lua_file /etc/nginx/conf.d/html/proxy.lua; proxy_redirect off ; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; client_max_body_size 50m; client_body_buffer_size 256k; proxy_connect_timeout 30; proxy_send_timeout 30; proxy_read_timeout 60; proxy_buffer_size 256k; proxy_buffers 4 256k; proxy_busy_buffers_size 256k; proxy_temp_file_write_size 256k; proxy_next_upstream error timeout invalid_header http_500 http_503 http_404; proxy_max_temp_file_size 128m; proxy_pass http://$upstreamhost; } }
lua腳本內容
/etc/nginx/conf.d/html/proxy.lua;
local request_method = ngx.var.request_method local args = nil local param = nil local param2 = nil if "GET" == request_method then args = ngx.req.get_uri_args() elseif "POST" == request_method then ngx.req.read_body() args = ngx.req.get_post_args() end if ngx.var.cookie_envs == ‘branches‘ then ngx.var.upstreamhost = "branches" elseif ngx.var.cookie_envs == ‘branchesv2‘ then ngx.var.upstreamhost = "branchesv2" end if not args or not args["envs"] then if not ngx.req.get_headers()[‘envs‘] then ngx.var.upstreamhost = "tags" elseif ngx.req.get_headers()[‘envs‘] == ‘branches‘ then ngx.var.upstreamhost = "branches" elseif ngx.req.get_headers()[‘envs‘] == ‘branchesv2‘ then ngx.var.upstreamhost = "branchesv2" else ngx.var.upstreamhost = "tags" end elseif args["envs"] == ‘branches‘ then ngx.header["Set-Cookie"]= "envs=branches; path=/" ngx.var.upstreamhost = "branches" elseif args["envs"] == ‘branchesv2‘ then ngx.header["Set-Cookie"]= "envs=branchesv2; Path=/" ngx.var.upstreamhost = "branchesv2" end
通過URL參數請求不同的後端服務器