X-Git-Url: https://git.openstreetmap.org./chef.git/blobdiff_plain/9b081c84fe8f9c69d2266673918aab7ad580339e..706faef198842557ca8a07970380fd753e29e8fc:/roles/karm.rb

diff --git a/roles/karm.rb b/roles/karm.rb
index 42b2e436a..e9ba46a38 100644
--- a/roles/karm.rb
+++ b/roles/karm.rb
@@ -2,6 +2,12 @@ name "karm"
 description "Master role applied to karm"
 
 default_attributes(
+  :apt => {
+    :sources => ["postgresql"]
+  },
+  :db => {
+    :cluster => "9.5/main"
+  },
   :networking => {
     :interfaces => {
       :internal_ipv4 => {
@@ -12,9 +18,44 @@ default_attributes(
         :hwaddress => "0c:c4:7a:a3:aa:ac"
       }
     }
+  },
+  :postgresql => {
+    :settings => {
+      :defaults => {
+        :shared_buffers => "64GB",
+        :work_mem => "64MB",
+        :maintenance_work_mem => "1GB",
+        :effective_cache_size => "180GB",
+        :effective_io_concurrency => "256"
+      }
+    },
+    :versions => ["9.5"]
+  },
+  :sysctl => {
+    :postgres => {
+      :comment => "Increase shared memory for postgres",
+      :parameters => {
+        "kernel.shmmax" => 66 * 1024 * 1024 * 1024,
+        "kernel.shmall" => 66 * 1024 * 1024 * 1024 / 4096
+      }
+    }
+  },
+  :sysfs => {
+    :md_tune => {
+      :comment => "Enable request merging for NVMe devices",
+      :parameters => {
+        "block/nvme0n1/queue/nomerges" => "1",
+        "block/nvme1n1/queue/nomerges" => "1",
+        "block/nvme2n1/queue/nomerges" => "1",
+        "block/nvme3n1/queue/nomerges" => "1",
+        "block/nvme4n1/queue/nomerges" => "1",
+        "block/nvme5n1/queue/nomerges" => "1"
+      }
+    }
   }
 )
 
 run_list(
-  "role[ic]"
+  "role[ic]",
+  "role[db-master]"
 )