cmd/k8s-operator: Allow configuration of login server (#16432)

This commit modifies the kubernetes operator to allow for customisation of the tailscale
login url. This provides some data locality for people that want to configure it.

This value is set in the `loginServer` helm value and is propagated down to all resources
managed by the operator. The only exception to this is recorder nodes, where additional
changes are required to support modifying the url.

Updates https://github.com/tailscale/corp/issues/29847

Signed-off-by: David Bond <davidsbond93@gmail.com>

cmd/k8s-operator/connector.go

@@ -7,6 +7,7 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/netip"
 	"slices"
@@ -14,8 +15,6 @@ import (
 	"sync"
 	"time"
 
-	"errors"
-
 	"go.uber.org/zap"
 	xslices "golang.org/x/exp/slices"
 	corev1 "k8s.io/api/core/v1"
@@ -26,6 +25,7 @@ import (
 	"k8s.io/client-go/tools/record"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+
 	tsoperator "tailscale.com/k8s-operator"
 	tsapi "tailscale.com/k8s-operator/apis/v1alpha1"
 	"tailscale.com/kube/kubetypes"
@@ -199,6 +199,7 @@ func (a *ConnectorReconciler) maybeProvisionConnector(ctx context.Context, logge
 		},
 		ProxyClassName: proxyClass,
 		proxyType:      proxyTypeConnector,
+		LoginServer:    a.ssr.loginServer,
 	}
 
 	if cn.Spec.SubnetRouter != nil && len(cn.Spec.SubnetRouter.AdvertiseRoutes) > 0 {