Skip to content

Commit

Permalink
Official 1.14 Release Docs (#13174)
Browse files Browse the repository at this point in the history
* Official documentation on Poseidon/Firmament, a new multi-scheduler support for K8S. (#11752)

* Added documentation about Poseidon-Firmament scheduler

* Fixed some style issues.

* Udpated the document as per the review comments.

* Fixed some typos and updated the document

* Updated the document as per the review comments.

* Document timeout attribute for kms-plugin. (#12158)

See 72540.

* Official documentation on Poseidon/Firmament, a new multi-scheduler  (#12343)

* Removed the old version of the Poseidon documentation. Incorrect location.

* Official documentation on Poseidon/Firmament, a new multi-scheduler support for K8S (#12069)

* Official documentation on Poseidon/Firmament, a new multi-scheduler support for K8S. (#11752)

* Added documentation about Poseidon-Firmament scheduler

* Fixed some style issues.

* Udpated the document as per the review comments.

* Fixed some typos and updated the document

* Updated the document as per the review comments.

* Updated the document as per review comments. Added config details.

* Updated the document as per the latest review comments. Fixed nits

* Made changes as per latest suggestions.

* Some more changes added.

* Updated as per suggestions.

* Changed the release process section.

* SIG Docs edits

Small edits to match style guidelines.

* add plus to feature state

* capitalization

* revert feature state shortcode

since this is a Kubernetes extension, not a direct feature, it shouldn't use the regular feature state tagging.

(cherry picked from commit 7730c15)

* Remove initializers from doc. It will be removed in 1.14 (#12331)

* kubeadm: Document CRI auto detection functionality (#12462)

Signed-off-by: Rostislav M. Georgiev <[email protected]>

* Minor doc change for GAing Pod DNS Config (#12514)

* Graduate ExpandInUsePersistentVolumes feature to beta (#10574)

* Rename 2018-11-07-grpc-load-balancing-with-linkerd.md.md file (#12594)

* Add dynamic percentage of node scoring to user docs (#12235)

* Add dynamic percentage of node scoring to user docs

* addressed review comments

* delete special symbol (#12445)

* Update documentation for VolumeSubpathEnvExpansion (#11843)

* Update documentation for VolumeSubpathEnvExpansion

* Address comments - improve descriptions

* Graduate Pod Priority and Preemption to GA (#12428)

* Added Instana links to the documentation (#12977)

* Added link to the Instana Kubernetes integration

* Added Instana link for services section

Added Instana and a link to the Kubernetes integration to the analytics services section and broadened the scope to APM, monitoring and analytics.

* Oxford comma /flex

* More Oxford commas, because they matter

* Update kubectl plugins to stable (#12847)

* documentation for CSI topology beta (#12889)

* Document changes to default RBAC discovery ClusterRole(Binding)s (#12888)

* Document changes to default RBAC discovery ClusterRole(Binding)s

Documentation for kubernetes/enhancements#789 and kubernetes/kubernetes#73807

* documentation review feedback

* CSI raw block to beta (#12931)

* Change incorrect string raw to block (#12926)

Fixes #12925

* Update documentation on node OS/arch labels (#12976)

These labels have been promoted to GA:
kubernetes/enhancements#793

* local pv GA doc updates (#12915)

* Publish CRD OpenAPI Documentation (#12910)

* add documentation for CustomResourcePublishOpenAPI

* address comments

fix links, ordered lists, style and typo

* kubeadm: add document for upgrading from 1.13 to 1.14 (single CP and HA) (#13189)

* kubeadm: add document for upgrading from 1.13 to 1.14

- remove doc for upgrading 1.10 -> 1.11

* kubeadm: apply amends to upgrade-1.14 doc

* kubeadm: apply amends to upgrade-1.14 doc (part2)

* kubeadm: apply amends to upgrade-1.14 doc (part3)

* kubeadm: add note about "upgrade node experimental-control-plane"

+ add comment about `upgrade plan`

* kubeadm: add missing "You should see output similar to this"

* fix bullet indentation (#13214)

* mark PodReadinessGate GA (#12800)

* Update RuntimeClass documentation for beta (#13043)

* Update RuntimeClass documentation for beta

* Update feature gate & add upgrade section

* formatting fixes

* Highlight upgrade action required

* Address feedback

* CSI ephemeral volume alpha documentation (#10934)

* update kubectl documentation (#12867)

* update kubectl documentation

* add document for Secret/ConfigMap generators

* replace `kubectl create -f` by `kubectl apply -f`

* Add page for kustomization support in kubectl

* fix spelling errors and address comments

* Documentation for Windows GMSA feature (#12936)

* Documentation for Windows GMSA feature

Signed-off-by: Deep Debroy <[email protected]>

* Enhancements to GMSA docs

Signed-off-by: Deep Debroy <[email protected]>

* Fix links

Signed-off-by: Deep Debroy <[email protected]>

* Fix GMSA link

Signed-off-by: Deep Debroy <[email protected]>

* Add GMSA feature flag in feature flag list

Signed-off-by: Deep Debroy <[email protected]>

* Relocate GMSA to container configuration

Signed-off-by: Deep Debroy <[email protected]>

* Add example for container spec

Signed-off-by: Deep Debroy <[email protected]>

* Remove changes in Windows index

Signed-off-by: Deep Debroy <[email protected]>

* Update configure-gmsa.md

* Update configure-gmsa.md

* Update configure-gmsa.md

* Update configure-gmsa.md

* Rearrange the steps into two sections and other edits

Signed-off-by: Deep Debroy <[email protected]>

* Fix links

Signed-off-by: Deep Debroy <[email protected]>

* Add reference to script to generate GMSA YAMLs

Signed-off-by: Deep Debroy <[email protected]>

* Some more clarifications for GMSA

Signed-off-by: Deep Debroy <[email protected]>

* HugePages graduated to GA (#13004)

* HugePages graduated to GA

* fixing nit for build

* Docs for node PID limiting (kubernetes/kubernetes#73651) (#12932)

* kubeadm: update the reference documentation for 1.14 (#12911)

* kubeadm: update list of generated files for 1.14

NOTE: PLACEHOLDERS! these files are generated by SIG Docs each
release, but we need them to pass the k/website PR CI.

- add join_phase* (new sub phases of join)
- add init_phase_upload-certs.md (new upload certs phase for init)
- remove alpha-preflight (now both init and join have this)

* kubeadm: update reference docs includes for 1.14

- remove includes from alpha.md
- add upload-certs to init-phase.md
- add join-phase.md and it's phases

* kubeadm: update the editorial content of join and init

- cleanup master->control-plane node
- add some notes about phases and join
- remove table about pre-pulling images
- remove outdated info about self-hosting

* kubeadm: update target release for v1alpha3 removal

1.14 -> 1.15

* kubeadm: copy edits for 1.14 reference docs (part1)

* kubeadm: use "shell" for code blocks

* kubeadm: update the 1.14 HA guide (#13191)

* kubeadm: update the 1.14 HA guide

* kubeadm: try to fix note/caution indent in HA page

* kubeadm: fix missing sudo and minor amends in HA doc

* kubeadm: apply latest amends to the HA doc for 1.14

* fixed a few missed merge conflicts

* Admission Webhook new features doc (#12938)

- kubernetes/kubernetes#74998
- kubernetes/kubernetes#74477
- kubernetes/kubernetes#74562

* Clarifications and fixes in GMSA doc (#13226)

* Clarifications and fixes in GMSA doc

Signed-off-by: Deep Debroy <[email protected]>

* Update configure-gmsa.md

* Reformat to align headings and pre-reqs better

Signed-off-by: Deep Debroy <[email protected]>

* Reformat to align headings and pre-reqs better

Signed-off-by: Deep Debroy <[email protected]>

* Reformat to fix bullets

Signed-off-by: Deep Debroy <[email protected]>

* Reword application of sample gmsa

Signed-off-by: Deep Debroy <[email protected]>

* Update configure-gmsa.md

* Address feedback to use active voice

Signed-off-by: Deep Debroy <[email protected]>

* Address feedback to use active voice

Signed-off-by: Deep Debroy <[email protected]>

* RunAsGroup documentation for Progressing this to Beta (#12297)

* start serverside-apply documentation (#13077)

* start serverside-apply documentation

* add more concept info on server side apply

* Update api concepts

* Update api-concepts.md

* fix style issues

* Document CSI update (#12928)

* Document CSI update

* Finish CSI documentation

Also fix mistake with  ExpandInUsePersistentVolumes documented as beta

* Overall docs for CSI Migration feature (#12935)

* Placeholder docs for CSI Migration feature

Signed-off-by: Deep Debroy <[email protected]>

* Address CR comments and update feature gates

Signed-off-by: Deep Debroy <[email protected]>

* Add mappings for CSI plugins

Signed-off-by: Deep Debroy <[email protected]>

* Add sections for AWS and GCE PD migration

Signed-off-by: Deep Debroy <[email protected]>

* Add docs for Cinder and CSI Migration info

Signed-off-by: Deep Debroy <[email protected]>

* Clarify scope to volumes with file system

Signed-off-by: Deep Debroy <[email protected]>

* Change the format of EBS and Cinder CSI Migration sections to follow the GCE template

Signed-off-by: Deep Debroy <[email protected]>

* Windows documentation updates for 1.14 (#12929)

* Updated the note to indicate doc work for 1.14

* first attempt at md export from gdoc

* simplifyig

* big attempt

* moving DRAFT windows content to PR for review

* moving content to PR in markdown for review

* updated note tags

* Delete windows-contributing.md

deleting this file as it is already ported to the github contributor guide

* fixed formatting in intro and cluster setup guide

* updating formatting for running containers guide

* rejiggered end of troubleshooting

* fixed minor typos

* Clarified the windows binary download step

* Update _index.md

making updates based on feedback

* Update _index.md

updating ovn-kubernetes docs

* Update _index.md

* Update _index.md

* updating relative docs links

updating all the links to be relative links to /docs

* Update _index.md

* Update _index.md

updates for windows services and ovn-kubernetes

* formatted for correct step numbering

* fix typos

* Update _index.md

updates for flannel PR in troubleshooting

* Update _index.md

* Update _index.md

updating a few sections like roadmap, services, troubleshooting/filing tickets

* Update _index.md

* Update _index.md

* Update _index.md

* Fixed a few whitespace issues

* Update _index.md

* Update _index.md

* Update _index.md

* add section on upgrading CoreDNS (#12909)

* documentation for kubelet resource metrics endpoint (#12934)

* windows docs updates for 1.14 (#13279)

* Delete sample-l2bridge-wincni-config.json

this file is not used anywhere

* Update _index.md

* Update _index.md

* Update _index.md

* Update _index.md

* Update _index.md

* Rename content/en/docs/getting-started-guides/windows/_index.md to content/en/docs/setup/windows/_index.md

moving to new location

* Delete flannel-master-kubectl-get-ds.png

* Delete flannel-master-kubeclt-get-pods.png

* Delete windows-docker-error.png

* Add files via upload

* Rename _index.md to add-windows-nodes.md

* Create _index.md

* Update _index.md

* Update add-windows-nodes.md

* Update add-windows-nodes.md

* Create user-guide-windows-nodes.md

* Create user-guide-windows-containers.md

* Update and rename add-windows-nodes.md to intro-windows-nodes.md

* Update user-guide-windows-containers.md

* Rename intro-windows-nodes.md to intro-windows-in-kubernetes.md

* Update user-guide-windows-nodes.md

* Update user-guide-windows-containers.md

* Update user-guide-windows-containers.md

* Update user-guide-windows-nodes.md

* Update user-guide-windows-containers.md

* Update _index.md

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

fixing the pause image

* Update intro-windows-in-kubernetes.md

changing tables from html to MD

* Update user-guide-windows-nodes.md

converting tables from HTML to MD

* Update intro-windows-in-kubernetes.md

* Update user-guide-windows-nodes.md

* Update user-guide-windows-nodes.md

* Update user-guide-windows-nodes.md

updating the numbering , even though it messes up the notes a little bit. Jim will file a ticket to follow up

* Update user-guide-windows-nodes.md

* update to windows docs for 1.14 (#13322)

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

* Update intro-windows-in-kubernetes.md

* Update user-guide-windows-containers.md

* Update user-guide-windows-nodes.md

* Update intro-windows-in-kubernetes.md (#13344)

* server side apply followup (#13321)

* change some parts of serverside apply docs in response to comments

* fix typos and wording

* Update config.toml (#13365)
  • Loading branch information
jimangel authored and k8s-ci-robot committed Mar 25, 2019
1 parent 28dd4d5 commit 851ef58
Show file tree
Hide file tree
Showing 160 changed files with 4,278 additions and 1,771 deletions.
40 changes: 20 additions & 20 deletions config.toml
Original file line number Diff line number Diff line change
Expand Up @@ -64,10 +64,10 @@ time_format_blog = "Monday, January 02, 2006"
description = "Production-Grade Container Orchestration"
showedit = true

latest = "v1.13"
latest = "v1.14"

fullversion = "v1.13.0"
version = "v1.13"
fullversion = "v1.14.0"
version = "v1.14"
githubbranch = "master"
docsbranch = "master"
deprecated = false
Expand All @@ -77,10 +77,10 @@ githubWebsiteRepo = "github.com/kubernetes/website"
githubWebsiteRaw = "raw.githubusercontent.com/kubernetes/website"

[[params.versions]]
fullversion = "v1.13.0"
version = "v1.13"
githubbranch = "v1.13.0"
docsbranch = "release-1.13"
fullversion = "v1.14.0"
version = "v1.14"
githubbranch = "v1.14.0"
docsbranch = "release-1.14"
url = "https://kubernetes.io"

[params.pushAssets]
Expand All @@ -95,33 +95,33 @@ js = [
]

[[params.versions]]
fullversion = "v1.12.3"
fullversion = "v1.13.4"
version = "v1.13"
githubbranch = "v1.13.4"
docsbranch = "release-1.13"
url = "https://v1-13.docs.kubernetes.io"

[[params.versions]]
fullversion = "v1.12.6"
version = "v1.12"
githubbranch = "v1.12.3"
githubbranch = "v1.12.6"
docsbranch = "release-1.12"
url = "https://v1-12.docs.kubernetes.io"

[[params.versions]]
fullversion = "v1.11.5"
fullversion = "v1.11.8"
version = "v1.11"
githubbranch = "v1.11.5"
githubbranch = "v1.11.8"
docsbranch = "release-1.11"
url = "https://v1-11.docs.kubernetes.io"

[[params.versions]]
fullversion = "v1.10.11"
fullversion = "v1.10.13"
version = "v1.10"
githubbranch = "v1.10.11"
githubbranch = "v1.10.13"
docsbranch = "release-1.10"
url = "https://v1-10.docs.kubernetes.io"

[[params.versions]]
fullversion = "v1.9.11"
version = "v1.9"
githubbranch = "v1.9.11"
docsbranch = "release-1.9"
url = "https://v1-9.docs.kubernetes.io"

# Language definitions.

[languages]
Expand Down
2 changes: 1 addition & 1 deletion content/en/docs/concepts/cluster-administration/logging.md
Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ a container that writes some text to standard output once per second.
To run this pod, use the following command:

```shell
kubectl create -f https://k8s.io/examples/debug/counter-pod.yaml
kubectl apply -f https://k8s.io/examples/debug/counter-pod.yaml
pod/counter created
```

Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,7 @@ Many applications require multiple resources to be created, such as a Deployment
Multiple resources can be created the same way as a single resource:

```shell
kubectl create -f https://k8s.io/examples/application/nginx-app.yaml
kubectl apply -f https://k8s.io/examples/application/nginx-app.yaml
```

```shell
Expand All @@ -36,16 +36,16 @@ deployment.apps/my-nginx created

The resources will be created in the order they appear in the file. Therefore, it's best to specify the service first, since that will ensure the scheduler can spread the pods associated with the service as they are created by the controller(s), such as Deployment.

`kubectl create` also accepts multiple `-f` arguments:
`kubectl apply` also accepts multiple `-f` arguments:

```shell
kubectl create -f https://k8s.io/examples/application/nginx/nginx-svc.yaml -f https://k8s.io/examples/application/nginx/nginx-deployment.yaml
kubectl apply -f https://k8s.io/examples/application/nginx/nginx-svc.yaml -f https://k8s.io/examples/application/nginx/nginx-deployment.yaml
```

And a directory can be specified rather than or in addition to individual files:

```shell
kubectl create -f https://k8s.io/examples/application/nginx/
kubectl apply -f https://k8s.io/examples/application/nginx/
```

`kubectl` will read any files with suffixes `.yaml`, `.yml`, or `.json`.
Expand All @@ -55,7 +55,7 @@ It is a recommended practice to put resources related to the same microservice o
A URL can also be specified as a configuration source, which is handy for deploying directly from configuration files checked into github:

```shell
kubectl create -f https://raw.githubusercontent.com/kubernetes/website/master/content/en/examples/application/nginx/nginx-deployment.yaml
kubectl apply -f https://raw.githubusercontent.com/kubernetes/website/master/content/en/examples/application/nginx/nginx-deployment.yaml
```

```shell
Expand Down Expand Up @@ -123,7 +123,7 @@ project/k8s/development
By default, performing a bulk operation on `project/k8s/development` will stop at the first level of the directory, not processing any subdirectories. If we had tried to create the resources in this directory using the following command, we would have encountered an error:

```shell
kubectl create -f project/k8s/development
kubectl apply -f project/k8s/development
```

```shell
Expand All @@ -133,7 +133,7 @@ error: you must provide one or more resources by argument or filename (.json|.ya
Instead, specify the `--recursive` or `-R` flag with the `--filename,-f` flag as such:

```shell
kubectl create -f project/k8s/development --recursive
kubectl apply -f project/k8s/development --recursive
```

```shell
Expand All @@ -147,7 +147,7 @@ The `--recursive` flag works with any operation that accepts the `--filename,-f`
The `--recursive` flag also works when multiple `-f` arguments are provided:

```shell
kubectl create -f project/k8s/namespaces -f project/k8s/development --recursive
kubectl apply -f project/k8s/namespaces -f project/k8s/development --recursive
```

```shell
Expand Down Expand Up @@ -193,7 +193,7 @@ and
The labels allow us to slice and dice our resources along any dimension specified by a label:

```shell
kubectl create -f examples/guestbook/all-in-one/guestbook-all-in-one.yaml
kubectl apply -f examples/guestbook/all-in-one/guestbook-all-in-one.yaml
kubectl get pods -Lapp -Ltier -Lrole
```

Expand Down Expand Up @@ -366,7 +366,6 @@ This command will compare the version of the configuration that you're pushing w

```shell
kubectl apply -f https://k8s.io/examples/application/nginx/nginx-deployment.yaml
```
```shell
deployment.apps/my-nginx configured
```
Expand All @@ -377,10 +376,6 @@ Currently, resources are created without this annotation, so the first invocatio

All subsequent calls to `kubectl apply`, and other commands that modify the configuration, such as `kubectl replace` and `kubectl edit`, will update the annotation, allowing subsequent calls to `kubectl apply` to detect and perform deletions using a three-way diff.

{{< note >}}
To use apply, always create resource initially with either `kubectl apply` or `kubectl create --save-config`.
{{< /note >}}

### kubectl edit

Alternatively, you may also update resources with `kubectl edit`:
Expand Down Expand Up @@ -430,8 +425,7 @@ deployment.apps/my-nginx replaced

At some point, you'll eventually need to update your deployed application, typically by specifying a new image or image tag, as in the canary deployment scenario above. `kubectl` supports several update operations, each of which is applicable to different scenarios.

We'll guide you through how to create and update applications with Deployments. If your deployed application is managed by Replication Controllers,
you should read [how to use `kubectl rolling-update`](/docs/tasks/run-application/rolling-update-replication-controller/) instead.
We'll guide you through how to create and update applications with Deployments.

Let's say you were running version 1.7.9 of nginx:

Expand Down
6 changes: 3 additions & 3 deletions content/en/docs/concepts/configuration/assign-pod-node.md
Original file line number Diff line number Diff line change
Expand Up @@ -69,7 +69,7 @@ Then add a nodeSelector like so:
{{< codenew file="pods/pod-nginx.yaml" >}}
When you then run `kubectl create -f https://k8s.io/examples/pods/pod-nginx.yaml`,
When you then run `kubectl apply -f https://k8s.io/examples/pods/pod-nginx.yaml`,
the Pod will get scheduled on the node that you attached the label to. You can
verify that it worked by running `kubectl get pods -o wide` and looking at the
"NODE" that the Pod was assigned to.
Expand All @@ -83,8 +83,8 @@ with a standard set of labels. As of Kubernetes v1.4 these labels are
* `failure-domain.beta.kubernetes.io/zone`
* `failure-domain.beta.kubernetes.io/region`
* `beta.kubernetes.io/instance-type`
* `beta.kubernetes.io/os`
* `beta.kubernetes.io/arch`
* `kubernetes.io/os`
* `kubernetes.io/arch`

{{< note >}}
The value of these labels is cloud provider specific and is not guaranteed to be reliable.
Expand Down
4 changes: 2 additions & 2 deletions content/en/docs/concepts/configuration/overview.md
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ This is a living document. If you think of something that is not on this list bu

- Group related objects into a single file whenever it makes sense. One file is often easier to manage than several. See the [guestbook-all-in-one.yaml](https://github.com/kubernetes/examples/tree/{{< param "githubbranch" >}}/guestbook/all-in-one/guestbook-all-in-one.yaml) file as an example of this syntax.

- Note also that many `kubectl` commands can be called on a directory. For example, you can call `kubectl create` on a directory of config files.
- Note also that many `kubectl` commands can be called on a directory. For example, you can call `kubectl apply` on a directory of config files.

- Don't specify default values unnecessarily: simple, minimal configuration will make errors less likely.

Expand Down Expand Up @@ -100,7 +100,7 @@ The caching semantics of the underlying image provider make even `imagePullPolic

## Using kubectl

- Use `kubectl apply -f <directory>` or `kubectl create -f <directory>`. This looks for Kubernetes configuration in all `.yaml`, `.yml`, and `.json` files in `<directory>` and passes it to `apply` or `create`.
- Use `kubectl apply -f <directory>`. This looks for Kubernetes configuration in all `.yaml`, `.yml`, and `.json` files in `<directory>` and passes it to `apply`.

- Use label selectors for `get` and `delete` operations instead of specific object names. See the sections on [label selectors](/docs/concepts/overview/working-with-objects/labels/#label-selectors) and [using labels effectively](/docs/concepts/cluster-administration/manage-deployment/#using-labels-effectively).

Expand Down
31 changes: 9 additions & 22 deletions content/en/docs/concepts/configuration/pod-priority-preemption.md
Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ weight: 70

{{% capture overview %}}

{{< feature-state for_k8s_version="1.11" state="beta" >}}
{{< feature-state for_k8s_version="1.14" state="stable" >}}

[Pods](/docs/user-guide/pods) can have _priority_. Priority indicates the
importance of a Pod relative to other Pods. If a Pod cannot be scheduled, the
Expand All @@ -19,8 +19,8 @@ pending Pod possible.
In Kubernetes 1.9 and later, Priority also affects scheduling order of Pods and
out-of-resource eviction ordering on the Node.

Pod priority and preemption are moved to beta since Kubernetes 1.11 and are
enabled by default in this release and later.
Pod priority and preemption graduated to beta in Kubernetes 1.11 and to GA in
Kubernetes 1.14. They have been enabled by default since 1.11.

In Kubernetes versions where Pod priority and preemption is still an alpha-level
feature, you need to explicitly enable it. To use these features in the older
Expand All @@ -34,6 +34,7 @@ Kubernetes Version | Priority and Preemption State | Enabled by default
1.9 | alpha | no
1.10 | alpha | no
1.11 | beta | yes
1.14 | GA | yes

{{< warning >}}In a cluster where not all users are trusted, a
malicious user could create pods at the highest possible priorities, causing
Expand Down Expand Up @@ -71,15 +72,15 @@ Pods.
## How to disable preemption

{{< note >}}
In Kubernetes 1.11, critical pods (except DaemonSet pods, which are
still scheduled by the DaemonSet controller) rely on scheduler preemption to be
scheduled when a cluster is under resource pressure. For this reason, you will
need to run an older version of Rescheduler if you decide to disable preemption.
More on this is provided below.
In Kubernetes 1.12+, critical pods rely on scheduler preemption to be scheduled
when a cluster is under resource pressure. For this reason, it is not
recommended to disable preemption.
{{< /note >}}

In Kubernetes 1.11 and later, preemption is controlled by a kube-scheduler flag
`disablePreemption`, which is set to `false` by default.
If you want to disable preemption despite the above note, you can set
`disablePreemption` to `true`.

This option is available in component configs only and is not available in
old-style command line options. Below is a sample component config to disable
Expand All @@ -96,20 +97,6 @@ algorithmSource:
disablePreemption: true
```
### Start an older version of Rescheduler in the cluster
When priority or preemption is disabled, we must run Rescheduler v0.3.1 (instead
of v0.4.0) to ensure that critical Pods are scheduled when nodes or cluster are
under resource pressure. Since critical Pod annotation is still supported in
this release, running Rescheduler should be enough and no other changes to the
configuration of Pods should be needed.
Rescheduler images can be found at:
[gcr.io/k8s-image-staging/rescheduler](http://gcr.io/k8s-image-staging/rescheduler).
In the code, changing the Rescheduler version back to v.0.3.1 is the reverse of
[this PR](https://github.com/kubernetes/kubernetes/pull/65454).
## PriorityClass
A PriorityClass is a non-namespaced object that defines a mapping from a
Expand Down
Loading

0 comments on commit 851ef58

Please sign in to comment.