nginx-luaHow to write JSON to log
log_format log_json '$json';
init_by_lua 'cjson = require("cjson")';
server {
location / {
set_by_lua_block $json {
return cjson.encode({http_version=ngx.req.http_version(), uri=ngx.var.request_uri})
}
access_log /var/log/nginx/json.log log_json;
}
}ctrl + clog_formatspecify custom log format to log request body | log_jsonlog format name |
$jsonthis variable will contain JSON to log | init_by_luanginx-lua module directive to run specified Lua code on server startup |
set_by_lua_blocknginx-lua module directive that sets specified variable with a result from Lua code | cjson.encodeencodes given Lua table to JSON string |
http_version=ngx.req.http_version()sample JSON key and value (just to show you can populate with anything) | access_logset access log path and format |
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