Production-Grade Container Scheduling and Management
Go to file
Kubernetes Submit Queue 2a989c60ff
Merge pull request #63221 from mtaufen/dkcfg-live-configmap
Automatic merge from submit-queue (batch tested with PRs 63881, 64046, 63409, 63402, 63221). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Kubelet responds to ConfigMap mutations for dynamic Kubelet config

This PR makes dynamic Kubelet config easier to reason about by leaving less room for silent skew scenarios. The new behavior is as follows:
- ConfigMap does not exist: Kubelet reports error status due to missing source
- ConfigMap is created: Kubelet starts using it
- ConfigMap is updated: Kubelet respects the update (but we discourage this pattern, in favor of incrementally migrating to a new ConfigMap)
- ConfigMap is deleted: Kubelet keeps using the config (non-disruptive), but reports error status due to missing source
- ConfigMap is recreated: Kubelet respects any updates (but, again, we discourage this pattern)

This PR also makes a small change to the config checkpoint file tree structure, because ResourceVersion is now taken into account when saving checkpoints. The new structure is as follows:
```
- dir named by --dynamic-config-dir (root for managing dynamic config)
| - meta
  | - assigned (encoded kubeletconfig/v1beta1.SerializedNodeConfigSource object, indicating the assigned config)
  | - last-known-good (encoded kubeletconfig/v1beta1.SerializedNodeConfigSource object, indicating the last-known-good config)
| - checkpoints
  | - uid1 (dir for versions of object identified by uid1)
    | - resourceVersion1 (dir for unpacked files from resourceVersion1)
    | - ...
  | - ...
```


fixes: #61643

```release-note
The dynamic Kubelet config feature will now update config in the event of a ConfigMap mutation, which reduces the chance for silent config skew. Only name, namespace, and kubeletConfigKey may now be set in Node.Spec.ConfigSource.ConfigMap. The least disruptive pattern for config management is still to create a new ConfigMap and incrementally roll out a new Node.Spec.ConfigSource.
```
2018-05-21 17:05:42 -07:00
.github modify outdate link 2018-05-03 09:23:36 +08:00
api Merge pull request #64004 from mbohlool/apiservice_order 2018-05-20 20:43:24 -07:00
build Fix SkippedPaths 2018-05-17 13:35:44 +05:30
cluster Merge pull request #64029 from loburm/truncate-flag 2018-05-19 05:17:00 -07:00
cmd Merge pull request #63221 from mtaufen/dkcfg-live-configmap 2018-05-21 17:05:42 -07:00
docs autogenerated 2018-05-18 00:55:01 +01:00
Godeps vSphere Cloud Provider: update vmware/gomvomi godeps 2018-05-15 10:06:56 -07:00
hack Merge pull request #63402 from juanvallejo/jvallejo/move-printer-flags-to-genericclihelpers 2018-05-21 17:05:38 -07:00
logo
pkg Merge pull request #63221 from mtaufen/dkcfg-live-configmap 2018-05-21 17:05:42 -07:00
plugin Merge pull request #63992 from mikedanese/owners 2018-05-17 15:47:33 -07:00
staging Merge pull request #63409 from mtaufen/kc-validation-feature-gates 2018-05-21 17:05:34 -07:00
test Merge pull request #63221 from mtaufen/dkcfg-live-configmap 2018-05-21 17:05:42 -07:00
third_party Fix error message in Equalities.DeepEqual 2018-05-20 02:22:09 +03:00
translations Adds initial Korean translations for kubectl 2018-05-12 11:16:49 +09:00
vendor update bazel 2018-05-15 10:08:38 -07:00
.bazelrc
.generated_files
.gitattributes
.gitignore Remove pkg/generated/bindata.go from the repo 2018-04-25 09:44:22 -07:00
.kazelcfg.json
BUILD.bazel
CHANGELOG-1.2.md
CHANGELOG-1.3.md
CHANGELOG-1.4.md
CHANGELOG-1.5.md
CHANGELOG-1.6.md
CHANGELOG-1.7.md Update CHANGELOG-1.7.md for v1.7.16. 2018-04-04 13:07:30 +00:00
CHANGELOG-1.8.md Update CHANGELOG-1.8.md for v1.8.13. 2018-05-15 19:34:20 +00:00
CHANGELOG-1.9.md Update CHANGELOG-1.9.md for v1.9.8. 2018-05-21 19:58:50 +00:00
CHANGELOG-1.10.md Update CHANGELOG-1.10.md for v1.10.3. 2018-05-21 10:36:05 +00:00
CHANGELOG-1.11.md Update CHANGELOG-1.11.md for v1.11.0-alpha.2. 2018-05-02 15:47:30 +00:00
CHANGELOG.md
code-of-conduct.md
CONTRIBUTING.md
labels.yaml
LICENSE
Makefile
Makefile.generated_files
OWNERS root OWNERS: escape backslashes 2018-04-13 10:42:22 -07:00
OWNERS_ALIASES Add myself to sig-scheduling maintainers/approvers list. 2018-04-26 14:15:14 -04:00
README.md
SUPPORT.md
WORKSPACE

Kubernetes

Submit Queue Widget GoDoc Widget CII Best Practices


Kubernetes is an open source system for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications.

Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.

Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who's involved and how Kubernetes plays a role, read the CNCF announcement.


To start using Kubernetes

See our documentation on kubernetes.io.

Try our interactive tutorial.

Take a free course on Scalable Microservices with Kubernetes.

To start developing Kubernetes

The community repository hosts all information about building Kubernetes from source, how to contribute code and documentation, who to contact about what, etc.

If you want to build Kubernetes right away there are two options:

You have a working Go environment.
$ go get -d k8s.io/kubernetes
$ cd $GOPATH/src/k8s.io/kubernetes
$ make
You have a working Docker environment.
$ git clone https://github.com/kubernetes/kubernetes
$ cd kubernetes
$ make quick-release

For the full story, head over to the developer's documentation.

Support

If you need support, start with the troubleshooting guide, and work your way through the process that we've outlined.

That said, if you have questions, reach out to us one way or another.

Analytics