From 80749d1a58bdb4527bd9fc719d271c35fb4e379f Mon Sep 17 00:00:00 2001
From: Nick Jones <nick@dischord.org>
Date: Tue, 29 Oct 2024 12:56:02 +0000
Subject: [PATCH] Enable parallel image pulls

As of 1.27, Kubernetes added support for parallelizing image pulls but
this is not enabled by default.  This is especially useful in situations
where multiple images need to be downloaded to a host, but one of them
is particularly large.
---
 .../templates/workload.yaml                          | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/charts/cluster-api-cluster-openstack/templates/workload.yaml b/charts/cluster-api-cluster-openstack/templates/workload.yaml
index 165e2f1..78b5e6a 100644
--- a/charts/cluster-api-cluster-openstack/templates/workload.yaml
+++ b/charts/cluster-api-cluster-openstack/templates/workload.yaml
@@ -107,6 +107,16 @@ spec:
         path: {{ $file.path }}
         permissions: "0600"
       {{- end }}
+      - path: /etc/kubernetes/patches/kubeletconfiguration0+strategic.json
+        owner: "root:root"
+        permissions: "0644"
+        content: |
+            {
+              "apiVersion": "kubelet.config.k8s.io/v1beta1",
+              "kind": "KubeletConfiguration",
+              "serializeImagePulls": false,
+              "maxParallelImagePulls": 10,
+            }
       joinConfiguration:
         nodeRegistration:
           name: {{ "'{{ local_hostname }}'" }}
@@ -115,4 +125,6 @@ spec:
             node-labels: {{- include "openstack.nodelabels.workload" $context | nindent 14 }}
           taints:
             {{- include "openstack.taints.workload" $ | nindent 10 }}
+        patches:
+          directory: /etc/kubernetes/patches
 {{- end }}