/
configmap.go
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/
configmap.go
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// Copyright 2018 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 configmap
import (
"fmt"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
)
const (
istioSecurityConfigMapName = "istio-security"
caTLSRootCertName = "caTLSRootCert"
)
// Controller manages the CA TLS root cert in ConfigMap.
type Controller struct {
core corev1.CoreV1Interface
namespace string
}
// NewController creates a new Controller.
func NewController(namespace string, core corev1.CoreV1Interface) *Controller {
return &Controller{
namespace: namespace,
core: core,
}
}
// InsertCATLSRootCert updates the CA TLS root certificate in the configmap.
func (c *Controller) InsertCATLSRootCert(value string) error {
configmap, err := c.core.ConfigMaps(c.namespace).Get(istioSecurityConfigMapName, metav1.GetOptions{})
exists := true
if err != nil {
if errors.IsNotFound(err) {
// Create a new ConfigMap.
configmap = &v1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: istioSecurityConfigMapName,
Namespace: c.namespace,
},
Data: map[string]string{},
}
exists = false
} else {
return fmt.Errorf("failed to insert CA TLS root cert: %v", err)
}
}
configmap.Data[caTLSRootCertName] = value
if exists {
if _, err = c.core.ConfigMaps(c.namespace).Update(configmap); err != nil {
return fmt.Errorf("failed to insert CA TLS root cert: %v", err)
}
} else {
if _, err = c.core.ConfigMaps(c.namespace).Create(configmap); err != nil {
return fmt.Errorf("failed to insert CA TLS root cert: %v", err)
}
}
return nil
}
// GetCATLSRootCert gets the CA TLS root certificate from the configmap.
func (c *Controller) GetCATLSRootCert() (string, error) {
configmap, err := c.core.ConfigMaps(c.namespace).Get(istioSecurityConfigMapName, metav1.GetOptions{})
if err != nil {
return "", fmt.Errorf("failed to get CA TLS root cert: %v", err)
}
rootCert := configmap.Data[caTLSRootCertName]
if rootCert == "" {
return "", fmt.Errorf("failed to get CA TLS root cert from configmap %s:%s",
istioSecurityConfigMapName, caTLSRootCertName)
}
return rootCert, nil
}