From 10a171eb188f1b0753c59ca196d4ffb0a418704e Mon Sep 17 00:00:00 2001
From: Vladimir Kozhukalov <kozhukalov@gmail.com>
Date: Mon, 11 Dec 2023 13:07:09 -0600
Subject: [PATCH] Increase the number of inotify instances

For TLS test jobs on Ubuntu Jammy when we run
dnsmasq on the master node needed for testing
we get the error:

"failed to create inotify: Too many open files"

By default the number of inotify instances on Jammy
is 128. We increase this up to 256.

Change-Id: I07c8a0f909608b6e44040ffeefc6ab576236c93f
---
 roles/deploy-env/tasks/common_k8s.yaml | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/roles/deploy-env/tasks/common_k8s.yaml b/roles/deploy-env/tasks/common_k8s.yaml
index ad222dfde7..530f8ce209 100644
--- a/roles/deploy-env/tasks/common_k8s.yaml
+++ b/roles/deploy-env/tasks/common_k8s.yaml
@@ -21,6 +21,16 @@
     - net.ipv4.ip_forward
   ignore_errors: true
 
+# This is necessary when we run dnsmasq.
+# Otherwise, we get the error:
+# failed to create inotify: Too many open files
+- name: Configure number of inotify instances
+  sysctl:
+    name: "fs.inotify.max_user_instances"
+    value: "256"
+    state: present
+  ignore_errors: true
+
 - name: Remove swapfile from /etc/fstab
   mount:
     name: "{{ item }}"