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kubernetes_cert_sans.go
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kubernetes_cert_sans.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package secrets
import (
"context"
"fmt"
"net/netip"
"github.com/cosi-project/runtime/pkg/controller"
"github.com/cosi-project/runtime/pkg/resource"
"github.com/cosi-project/runtime/pkg/state"
"github.com/siderolabs/gen/optional"
"go.uber.org/zap"
"github.com/siderolabs/talos/pkg/machinery/resources/k8s"
"github.com/siderolabs/talos/pkg/machinery/resources/network"
"github.com/siderolabs/talos/pkg/machinery/resources/secrets"
)
// KubernetesCertSANsController manages secrets.KubernetesCertSANs based on configuration.
type KubernetesCertSANsController struct{}
// Name implements controller.Controller interface.
func (ctrl *KubernetesCertSANsController) Name() string {
return "secrets.KubernetesCertSANsController"
}
// Inputs implements controller.Controller interface.
//
//nolint:dupl
func (ctrl *KubernetesCertSANsController) Inputs() []controller.Input {
return []controller.Input{
{
Namespace: secrets.NamespaceName,
Type: secrets.KubernetesRootType,
ID: optional.Some(secrets.KubernetesRootID),
Kind: controller.InputWeak,
},
{
Namespace: network.NamespaceName,
Type: network.HostnameStatusType,
ID: optional.Some(network.HostnameID),
Kind: controller.InputWeak,
},
{
Namespace: network.NamespaceName,
Type: network.NodeAddressType,
ID: optional.Some(network.FilteredNodeAddressID(network.NodeAddressAccumulativeID, k8s.NodeAddressFilterNoK8s)),
Kind: controller.InputWeak,
},
}
}
// Outputs implements controller.Controller interface.
func (ctrl *KubernetesCertSANsController) Outputs() []controller.Output {
return []controller.Output{
{
Type: secrets.CertSANType,
Kind: controller.OutputShared,
},
}
}
// Run implements controller.Controller interface.
//
//nolint:gocyclo
func (ctrl *KubernetesCertSANsController) Run(ctx context.Context, r controller.Runtime, logger *zap.Logger) error {
for {
select {
case <-ctx.Done():
return nil
case <-r.EventCh():
}
k8sRootRes, err := r.Get(ctx, resource.NewMetadata(secrets.NamespaceName, secrets.KubernetesRootType, secrets.KubernetesRootID, resource.VersionUndefined))
if err != nil {
if state.IsNotFoundError(err) {
if err = ctrl.teardownAll(ctx, r); err != nil {
return fmt.Errorf("error destroying resources: %w", err)
}
continue
}
return fmt.Errorf("error getting root k8s secrets: %w", err)
}
k8sRoot := k8sRootRes.(*secrets.KubernetesRoot).TypedSpec()
hostnameResource, err := r.Get(ctx, resource.NewMetadata(network.NamespaceName, network.HostnameStatusType, network.HostnameID, resource.VersionUndefined))
if err != nil {
if state.IsNotFoundError(err) {
continue
}
return err
}
hostnameStatus := hostnameResource.(*network.HostnameStatus).TypedSpec()
addressesResource, err := r.Get(ctx,
resource.NewMetadata(network.NamespaceName, network.NodeAddressType, network.FilteredNodeAddressID(network.NodeAddressAccumulativeID, k8s.NodeAddressFilterNoK8s), resource.VersionUndefined))
if err != nil {
if state.IsNotFoundError(err) {
continue
}
return err
}
nodeAddresses := addressesResource.(*network.NodeAddress).TypedSpec()
if err = r.Modify(ctx, secrets.NewCertSAN(secrets.NamespaceName, secrets.CertSANKubernetesID), func(r resource.Resource) error {
spec := r.(*secrets.CertSAN).TypedSpec()
spec.Reset()
spec.Append(k8sRoot.Endpoint.Hostname())
spec.Append(k8sRoot.CertSANs...)
spec.AppendDNSNames(
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc."+k8sRoot.DNSDomain,
"localhost",
)
spec.Append(
hostnameStatus.Hostname,
hostnameStatus.FQDN(),
)
spec.AppendIPs(k8sRoot.APIServerIPs...)
spec.AppendIPs(nodeAddresses.IPs()...)
spec.AppendIPs(netip.MustParseAddr("127.0.0.1"))
spec.Sort()
return nil
}); err != nil {
return err
}
r.ResetRestartBackoff()
}
}
func (ctrl *KubernetesCertSANsController) teardownAll(ctx context.Context, r controller.Runtime) error {
list, err := r.List(ctx, resource.NewMetadata(secrets.NamespaceName, secrets.CertSANType, "", resource.VersionUndefined))
if err != nil {
return err
}
for _, res := range list.Items {
if res.Metadata().Owner() == ctrl.Name() {
if err = r.Destroy(ctx, res.Metadata()); err != nil {
return err
}
}
}
return nil
}