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reconciler.go
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reconciler.go
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// Copyright 2024 The Carvel Authors.
// SPDX-License-Identifier: Apache-2.0
package config
import (
"context"
"fmt"
"github.com/go-logr/logr"
v1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
// Reconciler is responsible for reconciling kapp-controllers config.
type Reconciler struct {
coreClient kubernetes.Interface
config *Config
osConfig OSConfig
log logr.Logger
}
// NewReconciler constructs new Reconciler.
func NewReconciler(coreClient kubernetes.Interface,
config *Config, osConfig OSConfig, log logr.Logger) *Reconciler {
return &Reconciler{coreClient, config, osConfig, log}
}
var _ reconcile.Reconciler = &Reconciler{}
// AttachWatches configures watches needed for reconciler to reconcile the kapp-controller Config.
func (r *Reconciler) AttachWatches(controller controller.Controller, ns string, mgr manager.Manager) error {
// only reconcile on the KC's config
p := predicate.NewPredicateFuncs(func(o client.Object) bool {
return o.GetNamespace() == ns && o.GetName() == kcConfigName
})
err := controller.Watch(source.Kind(mgr.GetCache(), &v1.ConfigMap{}), &handler.EnqueueRequestForObject{}, p)
if err != nil {
return fmt.Errorf("Watching Configmaps: %s", err)
}
err = controller.Watch(source.Kind(mgr.GetCache(), &v1.Secret{}), &handler.EnqueueRequestForObject{}, p)
if err != nil {
return fmt.Errorf("Watching Secrets: %s", err)
}
return nil
}
// Reconcile gets the current config from the cluster and applies any changes.
func (r *Reconciler) Reconcile(_ context.Context, request reconcile.Request) (reconcile.Result, error) {
log := r.log.WithValues("request", request)
err := r.config.Reload()
if err != nil {
log.Error(err, "Getting kapp-controller config")
return reconcile.Result{}, nil // no re-queue
}
log.Info("Applying new config")
err = r.osConfig.ApplyCACerts(r.config.CACerts())
if err != nil {
log.Error(err, "Failed applying CA certificates")
// continue on
}
err = r.osConfig.ApplyProxy(r.config.ProxyOpts())
if err != nil {
log.Error(err, "Failed applying proxy opts")
// continue on
}
return reconcile.Result{}, nil // no re-queue
}