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istio_instances.go
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/
istio_instances.go
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// Copyright 2019 Google LLC
//
// 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.
//
// Copyright 2019 Google LLC. This software is provided as-is,
// without warranty or representation for any use or purpose.
//
package controllers
import (
"context"
"fmt"
appconfig "github.com/GoogleCloudPlatform/anthos-appconfig/appconfigmgrv2/api/v1alpha1"
"github.com/gogo/protobuf/types"
"istio.io/api/policy/v1beta1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime/schema"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)
// reconcileIstioHandlers reconciles istio Instance resources to support allowedClients
// functionality.
func (r *AppEnvConfigTemplateV2Reconciler) reconcileIstioInstances(
ctx context.Context,
in *appconfig.AppEnvConfigTemplateV2,
) error {
appLabelInst, err := istioAppLabelInstance(in)
if err != nil {
return fmt.Errorf("building: %v", err)
}
if err := controllerutil.SetControllerReference(in, appLabelInst, r.Scheme); err != nil {
return err
}
gvr := istioInstanceGVR()
if err := r.upsertUnstructured(ctx, appLabelInst, gvr, true); err != nil {
return fmt.Errorf("reconciling app label instance: %v", err)
}
return nil
}
func istioAppLabelInstance(t *appconfig.AppEnvConfigTemplateV2) (*unstructured.Unstructured, error) {
var (
gvk = istioInstanceGVK()
meta = map[string]interface{}{
"name": istioAppLabelInstanceName(t),
"namespace": t.Namespace,
}
spec = &v1beta1.Instance{
CompiledTemplate: "listentry",
Params: &types.Struct{
Fields: map[string]*types.Value{
"value": {Kind: &types.Value_StringValue{StringValue: `source.namespace + "/" + source.labels["app"]`}},
},
},
}
)
return unstructuredFromProto(gvk, meta, spec)
}
func istioAppLabelInstanceName(t *appconfig.AppEnvConfigTemplateV2) string {
return fmt.Sprintf("%v-applabel", t.Name)
}
func istioInstanceGVK() schema.GroupVersionKind {
return schema.GroupVersionKind{
Group: "config.istio.io",
Version: "v1alpha2",
Kind: "instance",
}
}
func istioInstanceGVR() schema.GroupVersionResource {
gvk := istioInstanceGVK()
return schema.GroupVersionResource{
Group: gvk.Group,
Version: gvk.Version,
Resource: "instances",
}
}