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token_store.go
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token_store.go
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package crds
import (
"context"
"time"
corev1beta1 "github.com/rancher/opni/apis/core/v1beta1"
corev1 "github.com/rancher/opni/pkg/apis/core/v1"
"github.com/rancher/opni/pkg/storage"
"github.com/rancher/opni/pkg/tokens"
"k8s.io/apimachinery/pkg/api/errors"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/util/retry"
"sigs.k8s.io/controller-runtime/pkg/client"
)
func (c *CRDStore) CreateToken(ctx context.Context, ttl time.Duration, opts ...storage.TokenCreateOption) (*corev1.BootstrapToken, error) {
options := storage.NewTokenCreateOptions()
options.Apply(opts...)
token := tokens.NewToken().ToBootstrapToken()
token.Metadata = &corev1.BootstrapTokenMetadata{
LeaseID: -1,
Ttl: int64(ttl.Seconds()),
UsageCount: 0,
Labels: options.Labels,
Capabilities: options.Capabilities,
}
err := c.client.Create(ctx, &corev1beta1.BootstrapToken{
ObjectMeta: metav1.ObjectMeta{
Name: token.TokenID,
Namespace: c.namespace,
Labels: options.Labels,
},
Spec: token,
})
if err != nil {
return nil, err
}
return token, nil
}
func (c *CRDStore) DeleteToken(ctx context.Context, ref *corev1.Reference) error {
err := c.client.Delete(ctx, &corev1beta1.BootstrapToken{
ObjectMeta: metav1.ObjectMeta{
Name: ref.Id,
Namespace: c.namespace,
},
})
if err != nil {
if k8serrors.IsNotFound(err) {
return storage.ErrNotFound
}
return err
}
return nil
}
func (c *CRDStore) GetToken(ctx context.Context, ref *corev1.Reference) (*corev1.BootstrapToken, error) {
token := &corev1beta1.BootstrapToken{}
err := c.client.Get(ctx, client.ObjectKey{
Name: ref.Id,
Namespace: c.namespace,
}, token)
if err != nil {
if k8serrors.IsNotFound(err) {
return nil, storage.ErrNotFound
}
return nil, err
}
patchTTL(token)
if token.Spec.Metadata.Ttl <= 0 {
go c.garbageCollectToken(token)
return nil, errors.NewNotFound(schema.GroupResource{
Group: "monitoring.opni.io",
Resource: "BootstrapToken",
}, token.GetName())
}
token.Spec.SetResourceVersion(token.GetResourceVersion())
return token.Spec, nil
}
func (c *CRDStore) ListTokens(ctx context.Context) ([]*corev1.BootstrapToken, error) {
list := &corev1beta1.BootstrapTokenList{}
err := c.client.List(ctx, list, client.InNamespace(c.namespace))
if err != nil {
return nil, err
}
tokens := make([]*corev1.BootstrapToken, len(list.Items))
for i, item := range list.Items {
patchTTL(&list.Items[i])
if item.Spec.Metadata.Ttl <= 0 {
go c.garbageCollectToken(&list.Items[i])
continue
}
tokens[i] = item.Spec
}
return tokens, nil
}
func (c *CRDStore) UpdateToken(ctx context.Context, ref *corev1.Reference, mutator storage.MutatorFunc[*corev1.BootstrapToken]) (*corev1.BootstrapToken, error) {
var token *corev1.BootstrapToken
err := retry.OnError(defaultBackoff, k8serrors.IsConflict, func() error {
existing := &corev1beta1.BootstrapToken{}
err := c.client.Get(ctx, client.ObjectKey{
Name: ref.Id,
Namespace: c.namespace,
}, existing)
if err != nil {
return err
}
clone := existing.DeepCopy()
mutator(clone.Spec)
token = clone.Spec
return c.client.Update(ctx, clone)
})
if err != nil {
if k8serrors.IsNotFound(err) {
return nil, storage.ErrNotFound
}
return nil, err
}
return token, nil
}
// garbageCollectToken performs a best-effort deletion of an expired token.
func (c *CRDStore) garbageCollectToken(token *corev1beta1.BootstrapToken) {
c.logger.With(
"token", token.GetName(),
).Debug("garbage-collecting expired token")
retry.OnError(retry.DefaultBackoff, func(err error) bool {
return !errors.IsNotFound(err)
}, func() error {
return c.client.Delete(context.Background(), token)
})
}
func patchTTL(token *corev1beta1.BootstrapToken) {
created := token.ObjectMeta.CreationTimestamp
ttl := token.Spec.Metadata.Ttl
// edit the ttl to reflect the current ttl of the token
newTtl := int64(ttl - (time.Now().Unix() - created.Unix()))
if newTtl < 0 {
newTtl = 0
}
token.Spec.Metadata.Ttl = newTtl
}