Make load balancer first-party package in CAPD

docs/book/src/developer/providers/v1.3-to-v1.4.md

@@ -70,7 +70,7 @@ maintainers of providers and consumers of our Go API.
   For more information, please see: https://github.com/kubernetes/enhancements/issues/2845
 - A new `KCPRemediationSpec` test has been added providing better test coverage for KCP remediation most common use cases. As a consequence `MachineRemediationSpec` now only tests remediation of
   worker machines (NOTE: we plan to improve this test as well in a future iteration).
-
+- Package `test/infrastructure/docker/internal/third_party/forked/loadbalancer` has been moved to `test/infrastructure/docker/internal/loadbalancer` to allow it to diverge from the upstream Kind package.
 ### Suggested changes for providers
 
 - Providers should add an explicit security context to their controllers deployment, see [#7831](https://github.com/kubernetes-sigs/cluster-api/pull/7831) for reference.

test/infrastructure/docker/internal/docker/loadbalancer.go

@@ -29,7 +29,7 @@ import (
 	"sigs.k8s.io/cluster-api/test/infrastructure/container"
 	infrav1 "sigs.k8s.io/cluster-api/test/infrastructure/docker/api/v1beta1"
 	"sigs.k8s.io/cluster-api/test/infrastructure/docker/internal/docker/types"
-	"sigs.k8s.io/cluster-api/test/infrastructure/docker/internal/third_party/forked/loadbalancer"
+	"sigs.k8s.io/cluster-api/test/infrastructure/docker/internal/loadbalancer"
 )
 
 type lbCreator interface {

test/infrastructure/docker/internal/third_party/forked/loadbalancer/config.go → test/infrastructure/docker/internal/loadbalancer/config.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 The Kubernetes Authors.
+Copyright 2023 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -23,19 +23,25 @@ import (
 	"sigs.k8s.io/kind/pkg/errors"
 )
 
-// ConfigData is supplied to the loadbalancer config template
+// ConfigData is supplied to the loadbalancer config template.
 type ConfigData struct {
 	ControlPlanePort int
 	BackendServers   map[string]string
 	IPv6             bool
 }
 
-// DefaultConfigTemplate is the loadbalancer config template
-const DefaultConfigTemplate = `# generated by kind
+// ConfigTemplate is the loadbalancer config template.
+const ConfigTemplate = `# generated by kind
 global
   log /dev/log local0
   log /dev/log local1 notice
   daemon
+  # limit memory usage to approximately 18 MB
+  maxconn 100000
+
+resolvers docker
+  nameserver dns 127.0.0.11:53
+
 defaults
   log global
   mode tcp
@@ -44,24 +50,27 @@ defaults
   timeout connect 5000
   timeout client 50000
   timeout server 50000
+  # allow to boot despite dns don't resolve backends
+  default-server init-addr none
+
 frontend control-plane
   bind *:{{ .ControlPlanePort }}
   {{ if .IPv6 -}}
   bind :::{{ .ControlPlanePort }};
   {{- end }}
   default_backend kube-apiservers
+
 backend kube-apiservers
   option httpchk GET /healthz
   # TODO: we should be verifying (!)
   {{range $server, $address := .BackendServers}}
-  server {{ $server }} {{ $address }} check check-ssl verify none
+  server {{ $server }} {{ $address }} check check-ssl verify none resolvers docker resolve-prefer {{ if $.IPv6 -}} ipv6 {{- else -}} ipv4 {{- end }}
   {{- end}}
 `
 
-// Config returns a kubeadm config generated from config data, in particular
-// the kubernetes version
+// Config generates the loadbalancer config from the ConfigTemplate and ConfigData.
 func Config(data *ConfigData) (config string, err error) {
-	t, err := template.New("loadbalancer-config").Parse(DefaultConfigTemplate)
+	t, err := template.New("loadbalancer-config").Parse(ConfigTemplate)
 	if err != nil {
 		return "", errors.Wrap(err, "failed to parse config template")
 	}

test/infrastructure/docker/internal/third_party/forked/loadbalancer/const.go → test/infrastructure/docker/internal/loadbalancer/const.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 The Kubernetes Authors.
+Copyright 2023 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -16,14 +16,16 @@ limitations under the License.
 
 package loadbalancer
 
-// Image defines the loadbalancer image name
-const Image = "haproxy"
+const (
+	// Image is the loadbalancer image name.
+	Image = "haproxy"
 
-// DefaultImageRepository defines the loadbalancer image repository
-const DefaultImageRepository = "kindest"
+	// DefaultImageRepository is the loadbalancer image repository.
+	DefaultImageRepository = "kindest"
 
-// DefaultImageTag defines the loadbalancer image tag
-const DefaultImageTag = "v20210715-a6da3463"
+	// DefaultImageTag is the loadbalancer image tag.
+	DefaultImageTag = "v20230227-d46f45b6"
 
-// ConfigPath defines the path to the config file in the image
-const ConfigPath = "/usr/local/etc/haproxy/haproxy.cfg"
+	// ConfigPath is the path to the config file in the image.
+	ConfigPath = "/usr/local/etc/haproxy/haproxy.cfg"
+)

test/infrastructure/docker/internal/third_party/forked/loadbalancer/doc.go → test/infrastructure/docker/internal/loadbalancer/doc.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 The Kubernetes Authors.
+Copyright 2023 The Kubernetes Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -14,5 +14,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// Package loadbalancer contains external loadbalancer related constants and configuration
+// Package loadbalancer contains external loadbalancer related constants and configuration.
+// This package was originally forked from the kind load balancer at https://github.com/kubernetes-sigs/kind/tree/v0.7.0/pkg/cluster/internal/loadbalancer
 package loadbalancer