increase inotify limits for docker VMs

Author: carlosonunez-vmw

Diff for: examples/docker.yaml

@@ -56,6 +56,15 @@ provision:
     systemctl --user start dbus
     dockerd-rootless-setuptool.sh install
     docker context use rootless
+- mode: system
+  script: |
+    #!/bin/bash
+    # Increase inotify limits to prevent nested Kubernetes control planes
+    # from crash looping.
+    set -eux -o pipefail
+    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