/
casecret.go
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/
casecret.go
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// Copyright Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package controller
import (
"context"
"time"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
"istio.io/istio/pkg/log"
)
var k8sControllerLog = log.RegisterScope("secretcontroller", "Citadel kubernetes controller log")
// CaSecretController manages the self-signed signing CA secret.
type CaSecretController struct {
client corev1.CoreV1Interface
}
// NewCaSecretController returns a pointer to a newly constructed SecretController instance.
func NewCaSecretController(core corev1.CoreV1Interface) *CaSecretController {
cs := &CaSecretController{
client: core,
}
return cs
}
// LoadCASecretWithRetry reads CA secret with retries until timeout.
func (csc *CaSecretController) LoadCASecretWithRetry(secretName, namespace string,
retryInterval, timeout time.Duration,
) (*v1.Secret, error) {
start := time.Now()
var caSecret *v1.Secret
var scrtErr error
for {
caSecret, scrtErr = csc.client.Secrets(namespace).Get(context.TODO(), secretName, metav1.GetOptions{})
if scrtErr == nil {
return caSecret, nil
}
k8sControllerLog.Errorf("Failed on loading CA secret %s:%s.",
namespace, secretName)
if time.Since(start) > timeout {
k8sControllerLog.Errorf("Timeout on loading CA secret %s:%s.",
namespace, secretName)
return caSecret, scrtErr
}
time.Sleep(retryInterval)
}
}
// UpdateCASecretWithRetry updates CA secret with retries until timeout.
func (csc *CaSecretController) UpdateCASecretWithRetry(caSecret *v1.Secret,
retryInterval, timeout time.Duration,
) error {
start := time.Now()
for {
_, scrtErr := csc.client.Secrets(caSecret.Namespace).Update(context.TODO(), caSecret, metav1.UpdateOptions{})
if scrtErr == nil {
return nil
}
k8sControllerLog.Errorf("Failed on updating CA secret %s:%s.",
caSecret.Namespace, caSecret.Name)
if time.Since(start) > timeout {
k8sControllerLog.Errorf("Timeout on updating CA secret %s:%s.",
caSecret.Namespace, caSecret.Name)
return scrtErr
}
time.Sleep(retryInterval)
}
}