From ec59b4fd783dcdf600bd8e10e2bbada94a14e6bd Mon Sep 17 00:00:00 2001
From: Alex Vandiver <alexmv@zulip.com>
Date: Thu, 1 Feb 2024 13:46:16 -0500
Subject: [PATCH] puppet: Enact redis' kernel config suggestions.

---
 puppet/zulip/manifests/profile/redis.pp | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/puppet/zulip/manifests/profile/redis.pp b/puppet/zulip/manifests/profile/redis.pp
index f6ed549c00..36922acbff 100644
--- a/puppet/zulip/manifests/profile/redis.pp
+++ b/puppet/zulip/manifests/profile/redis.pp
@@ -60,6 +60,21 @@ class zulip::profile::redis {
     content => template('zulip/zulip-redis.template.erb'),
   }
 
+  # https://redis.io/docs/management/admin/#linux
+  zulip::sysctl { 'redis-server':
+    key   => 'vm.overcommit_memory',
+    value => '1',
+  }
+  package { 'sysfsutils': }
+  file { '/etc/sysfs.d/40-disable-transpatent-hugepages.conf':
+    require => Package['sysfsutils'],
+    notify  => Service['sysfsutils'],
+    content => 'kernel/mm/transparent_hugepage/enabled = never',
+  }
+  service { 'sysfsutils':
+    ensure  => running,
+    require => Package['sysfsutils'],
+  }
   file { '/run/redis':
     ensure  => directory,
     owner   => 'redis',
@@ -69,7 +84,10 @@ class zulip::profile::redis {
   }
   service { $redis:
     ensure    => running,
-    require   => File['/run/redis'],
+    require   => [
+      Service['sysfsutils'],
+      File['/run/redis'],
+    ],
     subscribe => [
       File[$zulip_redisconf],
       Exec['redis'],