git subrepo clone (merge) https://github.com/kubernetes-incubator/metrics-server.git metrics-server
subrepo:
subdir: "metrics-server"
merged: "92d8412"
upstream:
origin: "https://github.com/kubernetes-incubator/metrics-server.git"
branch: "master"
commit: "92d8412"
git-subrepo:
version: "0.4.0"
origin: "???"
commit: "???"
diff --git a/metrics-server/vendor/k8s.io/client-go/util/retry/util.go b/metrics-server/vendor/k8s.io/client-go/util/retry/util.go
new file mode 100644
index 0000000..3ac0840
--- /dev/null
+++ b/metrics-server/vendor/k8s.io/client-go/util/retry/util.go
@@ -0,0 +1,79 @@
+/*
+Copyright 2016 The Kubernetes 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 retry
+
+import (
+ "time"
+
+ "k8s.io/apimachinery/pkg/api/errors"
+ "k8s.io/apimachinery/pkg/util/wait"
+)
+
+// DefaultRetry is the recommended retry for a conflict where multiple clients
+// are making changes to the same resource.
+var DefaultRetry = wait.Backoff{
+ Steps: 5,
+ Duration: 10 * time.Millisecond,
+ Factor: 1.0,
+ Jitter: 0.1,
+}
+
+// DefaultBackoff is the recommended backoff for a conflict where a client
+// may be attempting to make an unrelated modification to a resource under
+// active management by one or more controllers.
+var DefaultBackoff = wait.Backoff{
+ Steps: 4,
+ Duration: 10 * time.Millisecond,
+ Factor: 5.0,
+ Jitter: 0.1,
+}
+
+// RetryConflict executes the provided function repeatedly, retrying if the server returns a conflicting
+// write. Callers should preserve previous executions if they wish to retry changes. It performs an
+// exponential backoff.
+//
+// var pod *api.Pod
+// err := RetryOnConflict(DefaultBackoff, func() (err error) {
+// pod, err = c.Pods("mynamespace").UpdateStatus(podStatus)
+// return
+// })
+// if err != nil {
+// // may be conflict if max retries were hit
+// return err
+// }
+// ...
+//
+// TODO: Make Backoff an interface?
+func RetryOnConflict(backoff wait.Backoff, fn func() error) error {
+ var lastConflictErr error
+ err := wait.ExponentialBackoff(backoff, func() (bool, error) {
+ err := fn()
+ switch {
+ case err == nil:
+ return true, nil
+ case errors.IsConflict(err):
+ lastConflictErr = err
+ return false, nil
+ default:
+ return false, err
+ }
+ })
+ if err == wait.ErrWaitTimeout {
+ err = lastConflictErr
+ }
+ return err
+}