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Paste P9583

Masterwork From Distant Lands

Authored by ProdPasteBot on Fri, Nov 8, 4:47 PM.
# Transparent proxy which passes requests to a set of un-pooled
# application servers that are reserved for debugging, based on
# the value of the X-Wikimedia-Debug header.
# The X-Wikimedia-Debug header is made up of semicolon-separated
# fields. Each field may consist of either an attribute name or
# an attribute=value pairs. The block below extracts the value of
# the 'backend' attribute. For backward-compatibility, if the
# header does not contain a well-formed 'backend' attribute, then
# the entire header is used as the backend value.
map_hash_bucket_size 128;
# Trims the content of X-Wikimedia-Debug to be just the first flag
map $http_x_wikimedia_debug $debug_backend {
"~backend=(?<h>[^;]+)" $h;
default $http_x_wikimedia_debug;
# Checks if php7 is selected
map $http_x_wikimedia_debug $php_engine {
"~; php7" "php7";
default "hhvm";
map $debug_backend $debug_host {
"~^((mwdebug1001|mwdebug1002)\\.eqiad\\.wmnet|(mwdebug2001|mwdebug2002)\\.codfw\\.wmnet)" $debug_backend;
"1" "mwdebug1001.eqiad.wmnet";
"mw1017.eqiad.wmnet" "mwdebug1001.eqiad.wmnet";
"mw1099.eqiad.wmnet" "mwdebug1002.eqiad.wmnet";
"mw2017.codfw.wmnet" "mwdebug2001.codfw.wmnet";
"mw2099.codfw.wmnet" "mwdebug2002.codfw.wmnet";
default 'invalid';
server {
listen [::]:80 ipv6only=off;
server_name _;
access_log /var/log/nginx/debug_proxy_access.log;
error_log /var/log/nginx/debug_proxy_error.log;
client_max_body_size 100m;
location / {
if ($debug_host = invalid) {
return 400;
proxy_buffering off;
proxy_pass $scheme://$debug_host;
proxy_pass_request_headers on;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
# Swap whatever cookie we had for PHP_ENGINE with what we extracted
set_by_lua_block $cookies {
local cookie_snippet_to_set = "PHP_ENGINE=" .. ngx.var.php_engine;
local current_engine = ngx.var.cookie_PHP_ENGINE;
if (ngx.var.http_cookie == nil) then
return cookie_snippet_to_set;
elseif (current_engine == nil) then
return ngx.var.http_cookie .. ";" .. cookie_snippet_to_set;
local php_engine_cookie = "PHP_ENGINE=" .. current_engine;
return string.gsub(ngx.var.http_cookie, php_engine_cookie, cookie_snippet_to_set);
proxy_http_version 1.1;
proxy_set_header Cookie $cookies;
proxy_set_header Host $host;
proxy_pass_header Server;
proxy_read_timeout 180s;

Event Timeline

ProdPasteBot edited the content of this paste. (Show Details)Fri, Nov 8, 4:47 PM
ProdPasteBot changed the title of this paste from untitled to Masterwork From Distant Lands.