From eae9091a7de8aa4ebd28957f9b3837ee2b7496ad Mon Sep 17 00:00:00 2001
From: Tom Hughes <tom@compton.nu>
Date: Sun, 25 Sep 2016 15:18:26 +0100
Subject: [PATCH 1/1] Add a per-IP connection limit on planet.osm.org

---
 cookbooks/networking/attributes/default.rb                 | 1 +
 cookbooks/networking/definitions/firewall_rule.rb          | 3 ++-
 cookbooks/networking/recipes/default.rb                    | 2 ++
 cookbooks/networking/templates/default/shorewall-rules.erb | 4 ++--
 roles/planet.rb                                            | 5 +++++
 5 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/cookbooks/networking/attributes/default.rb b/cookbooks/networking/attributes/default.rb
index a672bee7e..88a4091f5 100644
--- a/cookbooks/networking/attributes/default.rb
+++ b/cookbooks/networking/attributes/default.rb
@@ -1,5 +1,6 @@
 default[:networking][:firewall][:inet] = []
 default[:networking][:firewall][:inet6] = []
+default[:networking][:firewall][:http_connection_limit] = "-"
 default[:networking][:interfaces] = {}
 default[:networking][:nameservers] = []
 default[:networking][:search] = []
diff --git a/cookbooks/networking/definitions/firewall_rule.rb b/cookbooks/networking/definitions/firewall_rule.rb
index 388470b9c..eb60a684c 100644
--- a/cookbooks/networking/definitions/firewall_rule.rb
+++ b/cookbooks/networking/definitions/firewall_rule.rb
@@ -25,7 +25,8 @@ define :firewall_rule, :action => :accept do
     :proto => params[:proto],
     :dest_ports => params[:dest_ports] || "-",
     :source_ports => params[:source_ports] || "-",
-    :rate_limit => params[:rate_limit] || "-"
+    :rate_limit => params[:rate_limit] || "-",
+    :connection_limit => params[:connection_limit] || "-"
   ]
 
   if params[:family].nil?
diff --git a/cookbooks/networking/recipes/default.rb b/cookbooks/networking/recipes/default.rb
index 0ed0841bf..16dd48269 100644
--- a/cookbooks/networking/recipes/default.rb
+++ b/cookbooks/networking/recipes/default.rb
@@ -336,6 +336,7 @@ firewall_rule "accept-http" do
   dest "fw"
   proto "tcp:syn"
   dest_ports "http"
+  connection_limit node[:networking][:firewall][:http_connection_limit]
 end
 
 firewall_rule "accept-https" do
@@ -344,4 +345,5 @@ firewall_rule "accept-https" do
   dest "fw"
   proto "tcp:syn"
   dest_ports "https"
+  connection_limit node[:networking][:firewall][:http_connection_limit]
 end
diff --git a/cookbooks/networking/templates/default/shorewall-rules.erb b/cookbooks/networking/templates/default/shorewall-rules.erb
index 7cda2fbf1..0b13f7ba0 100644
--- a/cookbooks/networking/templates/default/shorewall-rules.erb
+++ b/cookbooks/networking/templates/default/shorewall-rules.erb
@@ -6,8 +6,8 @@
 SECTION NEW
 <% end -%>
 
-# ACTION	SOURCE	DEST	PROTO		DEST		SOURCE	ORIGINAL	RATE
+# ACTION	SOURCE	DEST	PROTO		DEST		SOURCE	ORIGINAL	RATE	USER	MARK	CONNLIMIT
 #						PORTS		PORTS	DEST		LIMIT
 <% node[:networking][:firewall][@family].each do |r| # ~FC034 -%>
-<%= r[:action] %>		<%= r[:source] %>	<%= r[:dest] %>	<%= r[:proto] %>		<%= r[:dest_ports] %>	<%= r[:source_ports] %>	-	<%= r[:rate_limit] %>
+<%= r[:action] %>		<%= r[:source] %>	<%= r[:dest] %>	<%= r[:proto] %>		<%= r[:dest_ports] %>	<%= r[:source_ports] %>	-	<%= r[:rate_limit] %>	-	-	<%= r[:connection_limit] %>
 <% end -%>
diff --git a/roles/planet.rb b/roles/planet.rb
index 8ee1ce9e9..8c2870767 100644
--- a/roles/planet.rb
+++ b/roles/planet.rb
@@ -31,6 +31,11 @@ default_attributes(
       }
     }
   },
+  :networking => {
+    :firewall => {
+      :http_connection_limit => 10
+    }
+  },
   :apache => {
     :mpm => "event",
     :keepalive => true,
-- 
2.43.2