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manager_factory.go
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/
manager_factory.go
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// Copyright 2018 The Operator-SDK 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 release
import (
"fmt"
"strings"
"github.com/martinlindhe/base36"
"github.com/pborman/uuid"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
apitypes "k8s.io/apimachinery/pkg/types"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/typed/core/v1"
helmengine "k8s.io/helm/pkg/engine"
"k8s.io/helm/pkg/kube"
"k8s.io/helm/pkg/storage"
"k8s.io/helm/pkg/storage/driver"
"k8s.io/helm/pkg/tiller"
"k8s.io/helm/pkg/tiller/environment"
crmanager "sigs.k8s.io/controller-runtime/pkg/manager"
"github.com/operator-framework/operator-sdk/pkg/helm/client"
"github.com/operator-framework/operator-sdk/pkg/helm/engine"
"github.com/operator-framework/operator-sdk/pkg/helm/internal/types"
)
// ManagerFactory creates Managers that are specific to custom resources. It is
// used by the HelmOperatorReconciler during resource reconciliation, and it
// improves decoupling between reconciliation logic and the Helm backend
// components used to manage releases.
type ManagerFactory interface {
NewManager(r *unstructured.Unstructured) (Manager, error)
}
type managerFactory struct {
mgr crmanager.Manager
chartDir string
}
// NewManagerFactory returns a new Helm manager factory capable of installing and uninstalling releases.
func NewManagerFactory(mgr crmanager.Manager, chartDir string) ManagerFactory {
return &managerFactory{mgr, chartDir}
}
func (f managerFactory) NewManager(cr *unstructured.Unstructured) (Manager, error) {
clientv1, err := v1.NewForConfig(f.mgr.GetConfig())
if err != nil {
return nil, fmt.Errorf("failed to get core/v1 client: %s", err)
}
storageBackend := storage.Init(driver.NewSecrets(clientv1.Secrets(cr.GetNamespace())))
tillerKubeClient, err := client.NewFromManager(f.mgr)
if err != nil {
return nil, fmt.Errorf("failed to get client from manager: %s", err)
}
releaseServer, err := getReleaseServer(cr, storageBackend, tillerKubeClient)
if err != nil {
return nil, fmt.Errorf("failed to get helm release server: %s", err)
}
return &manager{
storageBackend: storageBackend,
tillerKubeClient: tillerKubeClient,
chartDir: f.chartDir,
tiller: releaseServer,
releaseName: getReleaseName(cr),
namespace: cr.GetNamespace(),
spec: cr.Object["spec"],
status: types.StatusFor(cr),
}, nil
}
// getReleaseServer creates a ReleaseServer configured with a rendering engine that adds ownerrefs to rendered assets
// based on the CR.
func getReleaseServer(cr *unstructured.Unstructured, storageBackend *storage.Storage, tillerKubeClient *kube.Client) (*tiller.ReleaseServer, error) {
controllerRef := metav1.NewControllerRef(cr, cr.GroupVersionKind())
ownerRefs := []metav1.OwnerReference{
*controllerRef,
}
baseEngine := helmengine.New()
e := engine.NewOwnerRefEngine(baseEngine, ownerRefs)
var ey environment.EngineYard = map[string]environment.Engine{
environment.GoTplEngine: e,
}
env := &environment.Environment{
EngineYard: ey,
Releases: storageBackend,
KubeClient: tillerKubeClient,
}
kubeconfig, err := tillerKubeClient.ToRESTConfig()
if err != nil {
return nil, err
}
cs, err := clientset.NewForConfig(kubeconfig)
if err != nil {
return nil, err
}
return tiller.NewReleaseServer(env, cs, false), nil
}
func getReleaseName(cr *unstructured.Unstructured) string {
return fmt.Sprintf("%s-%s", cr.GetName(), shortenUID(cr.GetUID()))
}
func shortenUID(uid apitypes.UID) string {
u := uuid.Parse(string(uid))
uidBytes, err := u.MarshalBinary()
if err != nil {
return strings.Replace(string(uid), "-", "", -1)
}
return strings.ToLower(base36.EncodeBytes(uidBytes))
}