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configmaps.go
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/
configmaps.go
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/*
Copyright 2022.
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 agent
import (
"context"
_ "embed"
"fmt"
"github.com/fluxninja/aperture/v2/operator/controllers"
"github.com/clarketm/json"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/record"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
"sigs.k8s.io/yaml"
agentv1alpha1 "github.com/fluxninja/aperture/v2/operator/api/agent/v1alpha1"
)
// configMapForAgentConfig prepares the ConfigMap object for the Agent.
func configMapForAgentConfig(
ctx context.Context,
client_ client.Client,
instance *agentv1alpha1.Agent,
scheme *runtime.Scheme,
) (*corev1.ConfigMap, error) {
jsonConfig, err := json.Marshal(instance.Spec.ConfigSpec)
if err != nil {
return nil, fmt.Errorf("failed to marshal Agent config to JSON. Error: '%s'", err.Error())
}
config, err := yaml.JSONToYAML(jsonConfig)
if err != nil {
return nil, fmt.Errorf("failed to marshal Agent config to YAML. Error: '%s'", err.Error())
}
cm := &corev1.ConfigMap{
ObjectMeta: v1.ObjectMeta{
Name: controllers.AgentResourceName(instance),
Namespace: instance.GetNamespace(),
Labels: controllers.CommonLabels(instance.Spec.Labels, instance.GetName(), controllers.AgentServiceName),
Annotations: instance.Spec.Annotations,
},
Data: map[string]string{
"aperture-agent.yaml": string(config),
},
}
if scheme != nil {
if err := ctrl.SetControllerReference(instance, cm, scheme); err != nil {
return nil, err
}
}
return cm, nil
}
// configMapForAgentControllerClientCert prepares the ConfigMap object for the Controller client certificate.
func configMapForAgentControllerClientCert(
ctx context.Context,
client_ client.Client,
instance *agentv1alpha1.Agent,
scheme *runtime.Scheme,
) (*corev1.ConfigMap, error) {
if instance.Spec.ConfigSpec.AgentFunctions.ClientConfig.GRPCClient.ClientTLSConfig.CAFile != "" {
return nil, nil
}
localControllerCert := controllers.GetControllerClientCert(instance.Spec.ConfigSpec.AgentFunctions.Endpoints, client_, ctx)
if localControllerCert == nil {
return nil, nil
}
cm := &corev1.ConfigMap{
ObjectMeta: v1.ObjectMeta{
Name: controllers.AgentControllerClientCertResourceName(instance),
Namespace: instance.GetNamespace(),
Labels: controllers.CommonLabels(instance.Spec.Labels, instance.GetName(), controllers.AgentServiceName),
Annotations: instance.Spec.Annotations,
},
Data: map[string]string{
instance.Spec.ControllerClientCertConfig.ClientCertKeyName: string(localControllerCert),
},
}
if scheme != nil {
if err := ctrl.SetControllerReference(instance, cm, scheme); err != nil {
return nil, err
}
}
return cm, nil
}
// CreateConfigMapForAgent calls the Kubernetes API to create the provided Agent ConfigMap resource.
func CreateConfigMapForAgent(
client client.Client, recorder record.EventRecorder, configMap *corev1.ConfigMap, ctx context.Context, instance *agentv1alpha1.Agent) (
controllerutil.OperationResult, error,
) {
res, err := controllerutil.CreateOrUpdate(ctx, client, configMap, controllers.ConfigMapMutate(configMap, configMap.Data))
if err != nil {
if errors.IsConflict(err) {
return CreateConfigMapForAgent(client, recorder, configMap, ctx, instance)
}
msg := fmt.Sprintf("failed to create ConfigMap '%s' for Instance '%s' in Namespace '%s'. Response='%v', Error='%s'",
configMap.GetName(), instance.GetName(), instance.GetNamespace(), res, err.Error())
if recorder != nil {
recorder.Event(instance, corev1.EventTypeNormal, "ConfigMapCreationFailed", msg)
}
return controllerutil.OperationResultNone, fmt.Errorf(msg)
}
if recorder != nil {
switch res {
case controllerutil.OperationResultCreated:
recorder.Eventf(instance, corev1.EventTypeNormal, "ConfigMapCreationSuccessful",
"Created ConfigMap '%s' in Namespace '%s'", configMap.GetName(), configMap.GetNamespace())
case controllerutil.OperationResultUpdated:
recorder.Eventf(instance, corev1.EventTypeNormal, "ConfigMapUpdationSuccessful",
"Updated ConfigMap '%s' in Namespace '%s'", configMap.GetName(), configMap.GetNamespace())
case controllerutil.OperationResultNone:
default:
}
}
return res, nil
}
// CreateAgentConfigMapInNamespace creates the Agent ConfigMap in the given namespace instead of the default one.
func CreateAgentConfigMapInNamespace(
ctx context.Context,
client client.Client,
instance *agentv1alpha1.Agent,
namespace string,
) *corev1.ConfigMap {
configMap, _ := configMapForAgentConfig(ctx, client, instance, nil)
configMap.Namespace = namespace
configMap.Annotations = controllers.AgentAnnotationsWithOwnerRef(instance)
return configMap
}
// CreateAgentControllerClientCertConfigMapInNamespace creates the Agent ConfigMap for Controller client certificate in the given namespace instead of the default one.
func CreateAgentControllerClientCertConfigMapInNamespace(
ctx context.Context,
client client.Client,
instance *agentv1alpha1.Agent,
namespace string,
) *corev1.ConfigMap {
configMap, _ := configMapForAgentControllerClientCert(ctx, client, instance, nil)
if configMap == nil {
return nil
}
configMap.Namespace = namespace
configMap.Annotations = controllers.AgentAnnotationsWithOwnerRef(instance)
return configMap
}