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kubernetes/staging
Kubernetes Submit Queue 6bc0b295b5 Merge pull request #50387 from jcbsmpsn/metric-certificate-expiration
Automatic merge from submit-queue

Add metric for remaining lifetime of certificates authenticating requests

fixes #50778

When incoming requests to the API server are authenticated by a certificate, the expiration of the certificate can affect the validity of the authentication. With auto rotation of certificates, which is starting with kubelet certificates, the goal is to use shorter lifetimes and let the kubelet renew the certificate as desired. Monitoring certificates which are approaching expiration and not renewing would be an early warning sign that nodes are about to stop participating in the cluster.

**Release note**:

```release-note
Add new Prometheus metric that monitors the remaining lifetime of certificates used to authenticate requests to the API server.
```
2017-08-16 10:19:22 -07:00
..
2017-08-14 14:16:26 -07:00
2017-04-19 15:58:09 -04:00
2017-07-20 07:41:37 +02:00

External Repository Staging Area

This directory is the staging area for packages that have been split to their own repository. The content here will be periodically published to respective top-level k8s.io repositories.

Repositories currently staged here:

The code in the staging/ directory is authoritative, i.e. the only copy of the code. You can directly modify such code.

Using staged repositories from Kubernetes code

Kubernetes code uses the repositories in this directory via symlinks in the vendor/k8s.io directory into this staging area. For example, when Kubernetes code imports a package from the k8s.io/client-go repository, that import is resolved to staging/src/k8s.io/client-go relative to the project root:

// pkg/example/some_code.go
package example

import (
  "k8s.io/client-go/dynamic" // resolves to staging/src/k8s.io/client-go/dynamic
)

Once the change-over to external repositories is complete, these repositories will actually be vendored from k8s.io/<package-name>.