From 88c3da7e61393b6f78f9e6c6619cb0458fdce55a Mon Sep 17 00:00:00 2001
From: Grant Slater <github@firefishy.com>
Date: Mon, 30 Sep 2024 12:50:01 +0100
Subject: [PATCH 1/1] Add tile sysctl tuning to lockheed

---
 roles/lockheed.rb | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/roles/lockheed.rb b/roles/lockheed.rb
index 8f42973e6..f4ace47e0 100644
--- a/roles/lockheed.rb
+++ b/roles/lockheed.rb
@@ -29,6 +29,39 @@ default_attributes(
       }
     }
   },
+  :sysctl => {
+    :sockets => {
+      :comment => "Increase size of connection queue",
+      :parameters => {
+        "net.core.somaxconn" => 10000
+      }
+    },
+    :network_conntrack_time_wait => {
+      :comment => "Only track completed connections for 30 seconds",
+      :parameters => {
+        "net.netfilter.nf_conntrack_tcp_timeout_time_wait" => "30"
+      }
+    },
+    :network_conntrack_max => {
+      :comment => "Increase max number of connections tracked",
+      :parameters => {
+        "net.netfilter.nf_conntrack_max" => "524288"
+      }
+    },
+    :no_tcp_slow_start => {
+      :comment => "Disable TCP slow start",
+      :parameters => {
+        "net.ipv4.tcp_slow_start_after_idle" => "0"
+      }
+    },
+    :tcp_use_bbr => {
+      :comment => "Use TCP BBR Congestion Control",
+      :parameters => {
+        "net.core.default_qdisc" => "fq",
+        "net.ipv4.tcp_congestion_control" => "bbr"
+      }
+    }
+  },
   :nginx => {
     :cache => {
       :proxy => {
-- 
2.39.5