Openresty + Lua 实现灰度发布

1. 创建Lua脚本

vi /home/services/openresty/conf.d/toggle.lua

-- 引入json解析
local cjson = require "cjson"
-- 获取请求头JSON
local comm_params = ngx.req.get_headers()["comm_params"]
-- URL解码(如果对象是UrlEncode编码)
local data = string.gsub(comm_params, '%%(%x%x)', function(h) return string.char(tonumber(h, 16)) end)
-- 解析JSON对象并获取属性
local app_version = cjson.decode(data)["version"]
local platform = cjson.decode(data)["platform"]

if app_version ~= nil and platform ~= nil then
	if app_version == "1.50.3" and platform == "2" then
    -- IOS APP
		ngx.exec("@review");
	elseif app_version == "1.50.2" and platform == "3" then
    -- Android APP
		ngx.exec("@review");
	else
		ngx.exec("@prod");
	end
else
	ngx.exec("@prod");
end

2. 修改nginx配置引用lua脚本

vi /home/services/openresty/conf.d/api-example.conf

server {
    listen 80;
    server_name example.com www.example.com;
    return 301 https://example.com$request_uri;
}

# HTTPS server
server {
    listen 443 ssl;
    server_name www.example.com;

    ssl_certificate /etc/nginx/ssl/8024687_example.com.pem;
    ssl_certificate_key /etc/nginx/ssl/8024687_example.com.key;

    ssl_session_cache shared:SSL:1m;
    ssl_session_timeout 5m;

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2; 
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;

    underscores_in_headers on;
	
    location / {
		access_by_lua_file /etc/nginx/conf.d/toggle.lua;
    }

    location @review {
        # 脚本测试
        default_type 'text/plain'; 
        content_by_lua 'ngx.say("review")';
        # 服务转发
        # proxy_pass http://192.168.1.11:8080;
        # proxy_set_header Host $host;
        # proxy_set_header X-Real-IP $remote_addr;
        # proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location @prod {
        # 脚本测试
        default_type 'text/plain';
        content_by_lua 'ngx.say("prod")';
        # 服务转发
        # proxy_pass http://192.168.1.12:8080;
        # proxy_set_header Host $host;
        # proxy_set_header X-Real-IP $remote_addr;
        # proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }


    proxy_intercept_errors on;
    error_page 404 /404.html;

    location = /404.html {
      root /usr/local/openresty/nginx/html;
    }

    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
      root /usr/local/openresty/nginx/html;
    }
}