From dc7a4b1fb99ebe612b64cb31694ae89e083ef8d0 Mon Sep 17 00:00:00 2001
From: Tomoki Sugiura <tomoki-sugiura@cybozu.co.jp>
Date: Thu, 9 May 2024 13:17:07 +0900
Subject: [PATCH] Make setup egress before the manager starts

Signed-off-by: Tomoki Sugiura <tomoki-sugiura@cybozu.co.jp>
---
 v2/controllers/pod_watcher.go | 30 ++++++++++++++++++++++++++++++
 v2/go.mod                     |  1 +
 v2/go.sum                     |  2 ++
 3 files changed, 33 insertions(+)

diff --git a/v2/controllers/pod_watcher.go b/v2/controllers/pod_watcher.go
index e4c86cbc..7fa35ff8 100644
--- a/v2/controllers/pod_watcher.go
+++ b/v2/controllers/pod_watcher.go
@@ -12,11 +12,13 @@ import (
 	"github.com/cybozu-go/coil/v2/pkg/founat"
 	"github.com/go-logr/logr"
 	"github.com/prometheus/client_golang/prometheus"
+	"golang.org/x/sync/errgroup"
 	corev1 "k8s.io/api/core/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/types"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/client/config"
 	"sigs.k8s.io/controller-runtime/pkg/log"
 	"sigs.k8s.io/controller-runtime/pkg/metrics"
 )
@@ -55,6 +57,34 @@ func SetupPodWatcher(mgr ctrl.Manager, ns, name string, ft founat.FoUTunnel, enc
 		peers:          make(map[string]map[string]struct{}),
 	}
 
+	client, err := client.New(config.GetConfigOrDie(), client.Options{})
+	if err != nil {
+		return err
+	}
+
+	var pods corev1.PodList
+	if err := client.List(context.Background(), &pods); err != nil {
+		return err
+	}
+
+	g := new(errgroup.Group)
+	for _, pod := range pods.Items {
+		pod := pod
+		g.Go(func() error {
+			if isTerminated(&pod) {
+				return nil
+			}
+			if !r.shouldHandle(&pod) {
+				return nil
+			}
+			fmt.Printf("shanpu: %s\n", pod.Name)
+			return r.addPod(&pod, log.FromContext(context.Background()))
+		})
+	}
+	if err := g.Wait(); err != nil {
+		return err
+	}
+
 	return ctrl.NewControllerManagedBy(mgr).
 		For(&corev1.Pod{}).
 		Complete(r)
diff --git a/v2/go.mod b/v2/go.mod
index e73ec80c..7e974650 100644
--- a/v2/go.mod
+++ b/v2/go.mod
@@ -22,6 +22,7 @@ require (
 	github.com/spf13/viper v1.18.2
 	github.com/vishvananda/netlink v1.2.1-beta.2.0.20230807190133-6afddb37c1f0
 	go.uber.org/zap v1.27.0
+	golang.org/x/sync v0.6.0
 	golang.org/x/sys v0.19.0
 	google.golang.org/grpc v1.63.2
 	google.golang.org/protobuf v1.33.0
diff --git a/v2/go.sum b/v2/go.sum
index c3148dcf..c9590689 100644
--- a/v2/go.sum
+++ b/v2/go.sum
@@ -220,6 +220,8 @@ golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=