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main.go
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main.go
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package main
import (
"context"
"flag"
"strconv"
gologr "github.com/go-logr/logr"
"go.uber.org/zap"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
toolscache "k8s.io/client-go/tools/cache"
"k8s.io/klog/v2"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/cache"
ctrlzap "sigs.k8s.io/controller-runtime/pkg/log/zap"
)
var (
logr gologr.Logger
namespace string
)
func main() {
ctx := gologr.NewContext(context.TODO(), logr)
c, err := cache.New(ctrl.GetConfigOrDie(), cache.Options{
Namespace: namespace,
})
if err != nil {
panic(err)
}
o := &v1.PartialObjectMetadata{}
o.SetGroupVersionKind(schema.GroupVersionKind{
Group: "",
Version: "v1",
Kind: "Secret",
})
i, err := c.GetInformer(ctx, o)
if err != nil {
panic(err)
}
i.AddEventHandler(toolscache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
name, err := toolscache.MetaNamespaceKeyFunc(obj)
if err != nil {
logr.Error(err, "while extracting object name")
return
}
logr.Info("add", "name", name)
},
})
if err := c.Start(ctx); err != nil {
panic(err)
}
}
func init() {
flag.StringVar(&namespace, "namespace", "", "watch one namespace")
opts := ctrlzap.Options{
Development: true,
}
opts.BindFlags(flag.CommandLine)
flag.Parse()
logr = ctrlzap.New(ctrlzap.UseFlagOptions(&opts))
atomlvl, ok := opts.Level.(zap.AtomicLevel)
if ok {
zaplvl := atomlvl.Level()
kloglvl := 0
if zaplvl < 0 {
kloglvl = -int(zaplvl)
}
dummy := flag.FlagSet{}
klog.InitFlags(&dummy)
// No way those can fail, so let's just ignore the errors.
_ = dummy.Set("v", strconv.Itoa(kloglvl))
_ = dummy.Parse(nil)
}
klog.SetLogger(logr)
ctrl.SetLogger(logr)
}