From 893a007aefd9a28ff0bf233c2f3f45cc352f882f Mon Sep 17 00:00:00 2001
From: Tom Hughes <tom@compton.nu>
Date: Fri, 17 Jul 2015 19:27:57 +0100
Subject: [PATCH 1/1] Add a request ID to connect frontend and backend logs

---
 cookbooks/web/recipes/backend.rb                    | 1 +
 cookbooks/web/recipes/frontend.rb                   | 1 +
 cookbooks/web/templates/default/apache.backend.erb  | 5 +++++
 cookbooks/web/templates/default/apache.frontend.erb | 5 +++++
 4 files changed, 12 insertions(+)

diff --git a/cookbooks/web/recipes/backend.rb b/cookbooks/web/recipes/backend.rb
index 6f86f2064..ae359ca47 100644
--- a/cookbooks/web/recipes/backend.rb
+++ b/cookbooks/web/recipes/backend.rb
@@ -28,6 +28,7 @@ apache_module "remoteip"
 apache_module "rewrite"
 apache_module "proxy"
 apache_module "proxy_fcgi"
+apache_module "setenvif"
 
 apache_site "default" do
   action [:disable]
diff --git a/cookbooks/web/recipes/frontend.rb b/cookbooks/web/recipes/frontend.rb
index 6f62f3186..1be89358c 100644
--- a/cookbooks/web/recipes/frontend.rb
+++ b/cookbooks/web/recipes/frontend.rb
@@ -31,6 +31,7 @@ apache_module "proxy_balancer"
 apache_module "lbmethod_byrequests"
 apache_module "lbmethod_bybusyness"
 apache_module "rewrite"
+apache_module "unique_id"
 
 apache_site "default" do
   action [:disable]
diff --git a/cookbooks/web/templates/default/apache.backend.erb b/cookbooks/web/templates/default/apache.backend.erb
index d6dc4cd39..4380f5ca7 100644
--- a/cookbooks/web/templates/default/apache.backend.erb
+++ b/cookbooks/web/templates/default/apache.backend.erb
@@ -28,6 +28,11 @@
   #
   RewriteEngine on
 
+  #
+  # Recover the unique ID from the request headers
+  #
+  SetEnvIf X-Request-Id ^(.*)$ UNIQUE_ID=$1
+
   #
   # Configure rails
   #
diff --git a/cookbooks/web/templates/default/apache.frontend.erb b/cookbooks/web/templates/default/apache.frontend.erb
index 5177f89eb..d0260be3d 100644
--- a/cookbooks/web/templates/default/apache.frontend.erb
+++ b/cookbooks/web/templates/default/apache.frontend.erb
@@ -30,6 +30,11 @@
   ExpiresActive On
   RewriteEngine on
 
+  #
+  # Add the unique ID to the request headers
+  #
+  RequestHeader set X-Request-Id %{UNIQUE_ID}e
+
   #
   # Block troublesome GPX data scrapping
   #
-- 
2.43.2