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contourconfig.go
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contourconfig.go
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// Copyright Project Contour 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 contourconfig
import (
"context"
contour_api_v1alpha1 "github.com/projectcontour/contour/apis/projectcontour/v1alpha1"
"github.com/projectcontour/contour/internal/provisioner/labels"
"github.com/projectcontour/contour/internal/provisioner/model"
"k8s.io/apimachinery/pkg/api/equality"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// EnsureContourConfig ensures that a ContourConfiguration exists for the given contour.
func EnsureContourConfig(ctx context.Context, cli client.Client, contour *model.Contour) error {
current, err := current(ctx, cli, contour)
switch {
// Legitimate error: return it
case err != nil && !errors.IsNotFound(err):
return err
// ContourConfiguration not found: create it
case errors.IsNotFound(err):
contourConfig := &contour_api_v1alpha1.ContourConfiguration{
ObjectMeta: metav1.ObjectMeta{
Namespace: contour.Namespace,
Name: contour.ContourConfigurationName(),
Labels: model.OwnerLabels(contour),
},
}
// Take any user-provided Config as a base.
if contour.Spec.RuntimeSettings != nil {
contourConfig.Spec = *contour.Spec.RuntimeSettings
}
// Override Gateway-specific settings to ensure the Contour is
// being configured correctly for the Gateway being provisioned.
setGatewayConfig(contourConfig, contour)
return cli.Create(ctx, contourConfig)
// Already exists: ensure it has the relevant fields set correctly.
default:
maybeUpdated := current.DeepCopy()
setGatewayConfig(maybeUpdated, contour)
if !equality.Semantic.DeepEqual(current, maybeUpdated) {
return cli.Update(ctx, maybeUpdated)
}
return nil
}
}
func setGatewayConfig(config *contour_api_v1alpha1.ContourConfiguration, contour *model.Contour) {
config.Spec.Gateway = &contour_api_v1alpha1.GatewayConfig{
GatewayRef: &contour_api_v1alpha1.NamespacedName{
Namespace: contour.Namespace,
Name: contour.Name,
},
}
if config.Spec.Envoy == nil {
config.Spec.Envoy = &contour_api_v1alpha1.EnvoyConfig{}
}
config.Spec.Envoy.Service = &contour_api_v1alpha1.NamespacedName{
Namespace: contour.Namespace,
Name: contour.EnvoyServiceName(),
}
}
// EnsureContourConfigDeleted deletes a ContourConfig for the provided contour, if the configured owner labels exist.
func EnsureContourConfigDeleted(ctx context.Context, cli client.Client, contour *model.Contour) error {
current, err := current(ctx, cli, contour)
if err != nil {
if errors.IsNotFound(err) {
return nil
}
return err
}
if labels.Exist(current, model.OwnerLabels(contour)) {
if err := cli.Delete(ctx, current); err != nil {
if errors.IsNotFound(err) {
return nil
}
return err
}
}
return nil
}
// current gets the ContourConfiguration for the provided contour from the api server.
func current(ctx context.Context, cli client.Client, contour *model.Contour) (*contour_api_v1alpha1.ContourConfiguration, error) {
current := &contour_api_v1alpha1.ContourConfiguration{}
key := types.NamespacedName{
Namespace: contour.Namespace,
Name: contour.ContourConfigurationName(),
}
if err := cli.Get(ctx, key, current); err != nil {
return nil, err
}
return current, nil
}