Increase inotify limits by default

This resolves #1178.

Author: carlosonunez-vmw

Diff for: examples/docker-rootful.yaml

@@ -54,6 +54,14 @@ provision:
     fi
     export DEBIAN_FRONTEND=noninteractive
     curl -fsSL https://get.docker.com | sh
+- mode: system
+  script: |
+    #!/bin/bash
+    # Increase inotify limits to prevent nested Kubernetes control planes
+    # from crash looping.
+    echo 'fs.inotify.max_user_watches = 524288' >> /etc/sysctl.conf
+    echo 'fs.inotify.max_user_instances = 512' >> /etc/sysctl.conf
+    sysctl --system
 probes:
 - script: |
     #!/bin/bash