/
license_acquirer.go
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/
license_acquirer.go
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/*
Copyright AppsCode Inc. and Contributors.
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 manager
import (
"context"
"os"
"path/filepath"
"strings"
"sync"
"go.bytebuilders.dev/license-proxyserver/pkg/common"
"go.bytebuilders.dev/license-proxyserver/pkg/storage"
verifier "go.bytebuilders.dev/license-verifier"
"go.bytebuilders.dev/license-verifier/apis/licenses/v1alpha1"
pc "go.bytebuilders.dev/license-verifier/client"
"go.bytebuilders.dev/license-verifier/info"
core "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
clusterv1 "open-cluster-management.io/api/cluster/v1"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
type LicenseAcquirer struct {
client.Client
BaseURL string
Token string
CacheDir string
mu sync.Mutex
LicenseCache map[string]*storage.LicenseRegistry
}
var _ reconcile.Reconciler = &LicenseAcquirer{}
// SetupWithManager sets up the controller with the Manager.
func (r *LicenseAcquirer) SetupWithManager(mgr ctrl.Manager) error {
return ctrl.NewControllerManagedBy(mgr).
For(&clusterv1.ManagedCluster{}).
Complete(r)
}
func (r *LicenseAcquirer) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
logger := log.FromContext(ctx)
logger.Info("Start reconciling")
managedCluster := &clusterv1.ManagedCluster{}
err := r.Get(ctx, request.NamespacedName, managedCluster)
if err != nil {
return reconcile.Result{}, err
}
var cid string
var features []string
for _, claim := range managedCluster.Status.ClusterClaims {
switch claim.Name {
case common.ClusterClaimClusterID:
cid = claim.Value
case common.ClusterClaimLicense:
features = strings.Split(claim.Value, ",")
}
}
if cid != "" && len(features) > 0 {
err = r.reconcile(ctx, managedCluster.Name, cid, features)
if err != nil {
return reconcile.Result{}, err
}
}
return reconcile.Result{}, nil
}
func (r *LicenseAcquirer) getLicenseRegistry(cid string) (*storage.LicenseRegistry, error) {
r.mu.Lock()
defer r.mu.Unlock()
reg, found := r.LicenseCache[cid]
if found {
return reg, nil
}
dir := filepath.Join(r.CacheDir, cid)
err := os.MkdirAll(dir, 0o755)
if err != nil {
return nil, err
}
reg = storage.NewLicenseRegistry(dir, nil)
r.LicenseCache[cid] = reg
return reg, nil
}
func (r *LicenseAcquirer) reconcile(ctx context.Context, clusterName, cid string, features []string) error {
sec := core.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: common.LicenseSecret,
Namespace: clusterName,
},
}
var secretExists bool
err := r.Get(context.TODO(), client.ObjectKey{Name: sec.Name, Namespace: sec.Namespace}, &sec)
if err == nil {
secretExists = true
} else if apierrors.IsNotFound(err) {
sec.Data = map[string][]byte{}
} else {
return err
}
reg, err := r.getLicenseRegistry(cid)
if err != nil {
return err
}
for _, feature := range features {
l, found := reg.LicenseForFeature(feature)
if !found {
var c *v1alpha1.Contract
l, c, err = r.getNewLicense(ctx, cid, []string{feature})
if err != nil {
return err
}
reg.Add(l, c)
}
sec.Data[l.PlanName] = l.Data
}
if secretExists {
return r.Update(context.TODO(), &sec)
} else {
return r.Create(context.TODO(), &sec)
}
}
func (r *LicenseAcquirer) getNewLicense(ctx context.Context, cid string, features []string) (*v1alpha1.License, *v1alpha1.Contract, error) {
logger := log.FromContext(ctx)
lc, err := pc.NewClient(r.BaseURL, r.Token, cid)
if err != nil {
return nil, nil, err
}
lbytes, con, err := lc.AcquireLicense(features)
if err != nil {
return nil, nil, err
}
logger.Info("acquired new license", "cid", cid, "features", strings.Join(features, ","))
caData, err := info.LoadLicenseCA()
if err != nil {
return nil, nil, err
}
caCert, err := info.ParseCertificate(caData)
if err != nil {
return nil, nil, err
}
l, err := verifier.ParseLicense(verifier.ParserOptions{
ClusterUID: cid,
CACert: caCert,
License: lbytes,
})
if err != nil {
return nil, nil, err
}
return &l, con, nil
}