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KEP 1327: Apply feedback for third party and dual sourced content (#19486) 

* Apply feedback for third party and dual sourced content

Add feedback from sftim

clarify which slack

* Limit third-party content to OSS

See https://github.com/kubernetes/enhancements/pull/1327#discussion_r392966251 for more discussion
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Zach Corleissen 2020-03-17 15:45:25 -07:00 committed by GitHub
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---
{{% capture overview %}}
This page contains guidelines for adding content to the Kubernetes documentation.
If you have questions about allowed content, join the [Kubernetes Slack](http://slack.k8s.io/) #sig-docs channel and ask! Use your best judgment, and feel free to
propose changes to this document in a pull request.
For additional information on creating new content for the Kubernetes
docs, follow the instructions in the [Style guide](/docs/contribute/style/style-guide).
This page contains guidelines for Kubernetes documentation.
If you have questions about what's allowed, join the #sig-docs channel in
[Kubernetes Slack](http://slack.k8s.io/) and ask!
You can register for Kubernetes Slack at http://slack.k8s.io/.
For information on creating new content for the Kubernetes
docs, follow the [style guide](/docs/contribute/style/style-guide).
{{% /capture %}}
{{% capture body %}}
## Contributing content
The Kubernetes documentation comprises the content of the
[kubernetes/website](https://github.com/kubernetes/website) source repository.
## Overview
Source for the Kubernetes website, including the docs, resides in the
[kubernetes/website](https://github.com/kubernetes/website) repository.
Located in the `kubernetes/website/content/<language_code>/docs` folder, the
majority of the Kubernetes documentation is specific to the [Kubernetes
project](https://github.com/kubernetes/kubernetes). The Kubernetes
documentation may also include content from projects in the
[kubernetes](https://github.com/kubernetes) and
[kubernetes-sigs](https://github.com/kubernetes-sigs) GitHub organizations if
those projects do not have their own documentation. Linking to active kubernetes,
kubernetes-sigs, and ({{< glossary_tooltip text="CNCF" term_id="cncf" >}}) projects from the Kubernetes documentation is always
allowed, but linking to vendor-specific products is not. Check the CNCF project lists
([Graduated/Incubating](https://www.cncf.io/projects/),
[Sandbox](https://www.cncf.io/sandbox-projects/),
[Archived](https://www.cncf.io/archived-projects/)) if you are unsure of a
project's CNCF status.
majority of Kubernetes documentation is specific to the [Kubernetes
project](https://github.com/kubernetes/kubernetes).
### Dual-sourced content
## What's allowed
Kubernetes documentation does not include duplicate content sourced from multiple
locations (*dual-sourced* content). Dual-sourced content requires duplicated
effort from project maintainers and tends to become outdated more quickly.
Before adding content, ask yourself this:
Kubernetes docs permit only some kinds of content.
- Is the content about an active CNCF project OR a project in the kubernetes or kubernetes-sigs GitHub organizations?
- If yes, then:
- Does the project have its own documentation?
- if yes, link to the project's documentation from the Kubernetes documentation
- if no, add the content to the project's repository if possible and then link to it from the Kubernetes documentation
- If no, then:
- Stop!
- Adding content about vendor-specific products is not allowed
- Linking to vendor-specific documentation and websites is not allowed
### Third party content
Kubernetes documentation includes applied examples of projects in the Kubernetes project&emdash;projects that live in the [kubernetes](https://github.com/kubernetes) and
[kubernetes-sigs](https://github.com/kubernetes-sigs) GitHub organizations.
### What is and isn't allowed
Links to active content in the Kubernetes project are always allowed.
There are some scenarios in which the Kubernetes documentation includes content from non-Kubernetes projects.
Below are general categories of non-Kubernetes project content along with guidelines of what is and is not allowed:
Kubernetes requires some third party content to function. Examples include container runtimes (containerd, CRI-O, Docker),
[networking policy](/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/) (CNI plugins), [Ingress controllers](https://kubernetes.io/docs/concepts/services-networking/ingress-controllers/), and [logging](https://kubernetes.io/docs/concepts/cluster-administration/logging/).
1. Instructional content involving non-Kubernetes projects during setup or operation of Kubernetes
- Allowed:
- Referring to or linking to existing documentation about a CNCF project or a project in the kubernetes or kubernetes-sigs GitHub organizations
- Example: for installating Kubernetes in a learning environment, including a prerequisite stating that successful installation and configuration of minikube is required and linking to the relevant minikube documentation
- Adding content for kubernetes or kubernetes-sigs projects that don't have their own instructional content
- Example: including [kubeadm](https://github.com/kubernetes/kubeadm) installation and troubleshooting instructions
- Not Allowed:
- Adding content that duplicates documentation in another repository
- Examples:
- Including minikube installation and configuration instructions; minikube has its own [documentation](https://minikube.sigs.k8s.io/docs/) that provides those instructions
- Including instructions for installing Docker, CRI-O, containerd, and other container runtimes on various operating systems
- Including instructions for installing Kubernetes on production environments using various projects:
- Kubernetes Rebar Integrated Bootstrap (KRIB) is a vendor-specific project and content belongs in the vendor's documentation
- [Kubernetes Operations (kops)](https://github.com/kubernetes/kops) has installation instructions and tutorials in its GitHub repository
- [Kubespray](https://kubespray.io) has its own documentation
- Adding a tutorial that explains how to perform a task using a vendor-specific product or an open source project that is not a CNCF project or a project in the kubernetes or kubnetes-sigs GitHub organizations
- Adding a tutorial on how to use a CNCF project or a project in the kubernetes or kubnetes-sigs GitHub organizations if the project has its own documentation
1. Detailed technical content about how to use a non-Kubernetes project or how that project is designed
Docs can link to third-party open source software (OSS) outside the Kubernetes project if it's necessary for Kubernetes to function.
Adding this type of content to the Kubernetes documentation is not allowed.
1. Content that describes a non-Kubernetes project
- Allowed:
- Adding a brief introductory paragraph about a CNCF project or a project in the kubernetes or kubernetes-sigs GitHub organizations; the paragraph may contain links to the project
- Not Allowed:
- Adding content describing a vendor-specific product
- Adding content describing an open source project that is not a CNCF project or a project in the kubernetes or kubnetes-sigs GitHub organizations
- Adding content that duplicates documentation from another project, regardless of source repository
- Example: adding [Kubernetes in Docker (KinD)](https://kind.sigs.k8s.io) documentation to the Kubernetes documentation
1. Content that simply links to information about a non-Kubernetes project
- Allowed:
- Linking to projects in the kubernetes and kubernetes-sigs GitHub organizations
- Example: linking to Kubernetes in Docker (KinD) [documentation](https://kind.sigs.k8s.io/docs/user/quick-start), which resides in the kubernetes-sigs GitHub organization
- Linking to active CNCF projects
- Example: linking to the Prometheus [documentation](https://prometheus.io/docs/introduction/overview/); Prometheus is an active CNCF project
- Not Allowed:
- Linking to vendor-specific products
- Linking to archived CNCF projects
- Linking to inactive projects in the kubernetes and kubernetes-sigs GitHub organizations
- Linking to open source projects that are not CNCF projects or do not reside in the kubernetes or kubernetes-sigs GitHub organizations
1. Content about training courses
- Allowed:
- Linking to vendor-neutral Kubernetes training courses offered by the [CNCF](https://www.cncf.io/), the [Linux Foundation](https://www.linuxfoundation.org/), and the [Linux Academy](https://linuxacademy.com/), which is a partner of the Linux Foundation
- Example: linking to Linux Academy courses such as [Kubernetes Quick Start](https://linuxacademy.com/course/kubernetes-quick-start/) and [Kubernetes Security](https://linuxacademy.com/course/kubernetes-security/)
- Not Allowed:
- Linking to online training outside of the CNCF, the Linux Foundation, or the Linux Academy; the Kubernetes documentation does not link to third-party content
- Example: linking to Kubernetes tutorials or courses on Medium, KodeKloud, Udacity, Coursera, learnk8s, and similar websites
- Linking to vendor-specific tutorials regardless of the training provider
- Example: linking to Linux Academy courses such as [Google Kubernetes Engine Deep Dive](https://linuxacademy.com/google-cloud-platform/training/course/name/google-kubernetes-engine-deep-dive) and [Amazon EKS Deep Dive](https://linuxacademy.com/course/amazon-eks-deep-dive/)
### Dual sourced content
Wherever possible, Kubernetes docs link to canonical sources instead of hosting
dual-sourced content.
Dual-sourced content requires double the effort (or more!) to maintain
and grows stale more quickly.
{{< note >}}
If you're a maintainer for a Kubernetes project and need help hosting your own docs,
ask for help in [#sig-docs on Kubernetes Slack](https://kubernetes.slack.com/messages/C1J0BPD2M/).
{{< /note >}}
### More information
If you have questions about allowed content, join the [Kubernetes Slack](http://slack.k8s.io/) #sig-docs channel and ask!
{{% /capture %}}
{{% capture whatsnext %}}
* Read the [Style guide](/docs/contribute/style/style-guide).
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@ -53,63 +53,6 @@ If you're learning Kubernetes, use the Docker-based solutions: tools supported b
When evaluating a solution for a production environment, consider which aspects of operating a Kubernetes cluster (or _abstractions_) you want to manage yourself or offload to a provider.
Some possible abstractions of a Kubernetes cluster are {{< glossary_tooltip text="applications" term_id="applications" >}}, {{< glossary_tooltip text="data plane" term_id="data-plane" >}}, {{< glossary_tooltip text="control plane" term_id="control-plane" >}}, {{< glossary_tooltip text="cluster infrastructure" term_id="cluster-infrastructure" >}}, and {{< glossary_tooltip text="cluster operations" term_id="cluster-operations" >}}.
The following diagram lists the possible abstractions of a Kubernetes cluster and whether an abstraction is self-managed or managed by a provider.
Production environment solutions![Production environment solutions](/images/docs/KubernetesSolutions.svg)
{{< table caption="Production environment solutions table lists the providers and the solutions." >}}
The following production environment solutions table lists the providers and the solutions that they offer.
|Providers | Managed | Turnkey cloud | On-prem datacenter | Custom (cloud) | Custom (On-premises VMs)| Custom (Bare Metal) |
| --------- | ------ | ------ | ------ | ------ | ------ | ----- |
| [Agile Stacks](https://www.agilestacks.com/products/kubernetes)| | &#x2714; | &#x2714; | | |
| [Alibaba Cloud](https://www.alibabacloud.com/product/kubernetes)| | &#x2714; | | | |
| [Amazon](https://aws.amazon.com) | [Amazon EKS](https://aws.amazon.com/eks/) |[Amazon EC2](https://aws.amazon.com/ec2/) | | | |
| [AppsCode](https://appscode.com/products/pharmer/) | &#x2714; | | | | |
| [APPUiO](https://appuio.ch/)  | &#x2714; | &#x2714; | &#x2714; | | | |
| [Banzai Cloud Pipeline Kubernetes Engine (PKE)](https://banzaicloud.com/products/pke/) | | &#x2714; | | &#x2714; | &#x2714; | &#x2714; |
| [CenturyLink Cloud](https://www.ctl.io/) | | &#x2714; | | | |
| [Cisco Container Platform](https://cisco.com/go/containers) | | | &#x2714; | | |
| [Cloud Foundry Container Runtime (CFCR)](https://docs-cfcr.cfapps.io/) | | | | &#x2714; |&#x2714; |
| [CloudStack](https://cloudstack.apache.org/) | | | | | &#x2714;|
| [Canonical](https://ubuntu.com/kubernetes) | &#x2714; | &#x2714; | &#x2714; | &#x2714; |&#x2714; | &#x2714;
| [Containership](https://containership.io) | &#x2714; |&#x2714; | | | |
| [D2iQ](https://d2iq.com/) | | [Kommander](https://docs.d2iq.com/ksphere/kommander/) | [Konvoy](https://d2iq.com/solutions/ksphere/konvoy) | [Konvoy](https://d2iq.com/solutions/ksphere/konvoy) | [Konvoy](https://d2iq.com/solutions/ksphere/konvoy) | [Konvoy](https://d2iq.com/solutions/ksphere/konvoy) |
| [Digital Rebar](https://provision.readthedocs.io/en/tip/README.html) | | | | | | &#x2714;
| [DigitalOcean](https://www.digitalocean.com/products/kubernetes/) | &#x2714; | | | | |
| [Docker Enterprise](https://www.docker.com/products/docker-enterprise) | |&#x2714; | &#x2714; | | | &#x2714;
| [Gardener](https://gardener.cloud/) | &#x2714; | &#x2714; | &#x2714; | &#x2714; | &#x2714; | [Custom Extensions](https://github.com/gardener/gardener/blob/master/docs/extensions/overview.md) |
| [Giant Swarm](https://www.giantswarm.io/) | &#x2714; | &#x2714; | &#x2714; | |
| [Google](https://cloud.google.com/) | [Google Kubernetes Engine (GKE)](https://cloud.google.com/kubernetes-engine/) | [Google Compute Engine (GCE)](https://cloud.google.com/compute/)|[GKE On-Prem](https://cloud.google.com/gke-on-prem/) | | | | | | | |
| [Hidora](https://hidora.com/) | &#x2714; | &#x2714;| &#x2714; | | | | | | | |
| [IBM](https://www.ibm.com/in-en/cloud) | [IBM Cloud Kubernetes Service](https://cloud.ibm.com/kubernetes/catalog/cluster)| |[IBM Cloud Private](https://www.ibm.com/in-en/cloud/private) | |
| [Ionos](https://www.ionos.com/enterprise-cloud) | [Ionos Managed Kubernetes](https://www.ionos.com/enterprise-cloud/managed-kubernetes) | [Ionos Enterprise Cloud](https://www.ionos.com/enterprise-cloud) | |
| [Kontena Pharos](https://www.kontena.io/pharos/) | |&#x2714;| &#x2714; | | |
| [KubeOne](https://kubeone.io/) | | &#x2714; | &#x2714; | &#x2714; | &#x2714; | &#x2714; |
| [Kubermatic](https://kubermatic.io/) | &#x2714; | &#x2714; | &#x2714; | &#x2714; | &#x2714; | &#x2714; |
| [KubeSail](https://kubesail.com/) | &#x2714; | | | | |
| [Kubespray](https://kubespray.io/#/) | | | |&#x2714; | &#x2714; | &#x2714; |
| [Kublr](https://kublr.com/) |&#x2714; | &#x2714; |&#x2714; |&#x2714; |&#x2714; |&#x2714; |
| [Microsoft Azure](https://azure.microsoft.com) | [Azure Kubernetes Service (AKS)](https://azure.microsoft.com/en-us/services/kubernetes-service/) | | | | |
| [Mirantis Cloud Platform](https://www.mirantis.com/software/kubernetes/) | | | &#x2714; | | |
| [NetApp Kubernetes Service (NKS)](https://cloud.netapp.com/kubernetes-service) | &#x2714; | &#x2714; | &#x2714; | | |
| [Nirmata](https://www.nirmata.com/) | | &#x2714; | &#x2714; | | |
| [Nutanix](https://www.nutanix.com/en) | [Nutanix Karbon](https://www.nutanix.com/products/karbon) | [Nutanix Karbon](https://www.nutanix.com/products/karbon) | | | [Nutanix AHV](https://www.nutanix.com/products/acropolis/virtualization) |
| [OpenNebula](https://www.opennebula.org) |[OpenNebula Kubernetes](https://marketplace.opennebula.systems/docs/service/kubernetes.html) | | | | |
| [OpenShift](https://www.openshift.com) |[OpenShift Dedicated](https://www.openshift.com/products/dedicated/) and [OpenShift Online](https://www.openshift.com/products/online/) | | [OpenShift Container Platform](https://www.openshift.com/products/container-platform/) | | [OpenShift Container Platform](https://www.openshift.com/products/container-platform/) |[OpenShift Container Platform](https://www.openshift.com/products/container-platform/)
| [Oracle Cloud Infrastructure Container Engine for Kubernetes (OKE)](https://docs.cloud.oracle.com/iaas/Content/ContEng/Concepts/contengoverview.htm) | &#x2714; | &#x2714; | | | |
| [oVirt](https://www.ovirt.org/) | | | | | &#x2714; |
| [Pivotal](https://pivotal.io/) | | [Enterprise Pivotal Container Service (PKS)](https://pivotal.io/platform/pivotal-container-service) | [Enterprise Pivotal Container Service (PKS)](https://pivotal.io/platform/pivotal-container-service) | | |
| [Platform9](https://platform9.com/) | [Platform9 Managed Kubernetes](https://platform9.com/managed-kubernetes/) | | [Platform9 Managed Kubernetes](https://platform9.com/managed-kubernetes/) | &#x2714; | &#x2714; | &#x2714;
| [Rancher](https://rancher.com/) | | [Rancher 2.x](https://rancher.com/docs/rancher/v2.x/en/) | | [Rancher Kubernetes Engine (RKE)](https://rancher.com/docs/rke/latest/en/) | | [k3s](https://k3s.io/)
| [Supergiant](https://supergiant.io/) | |&#x2714; | | | |
| [SUSE](https://www.suse.com/) | | &#x2714; | | | |
| [SysEleven](https://www.syseleven.io/) | &#x2714; | | | | |
| [Tencent Cloud](https://intl.cloud.tencent.com/) | [Tencent Kubernetes Engine](https://intl.cloud.tencent.com/product/tke) | &#x2714; | &#x2714; | | | &#x2714; |
| [VEXXHOST](https://vexxhost.com/) | &#x2714; | &#x2714; | | | |
| [VMware](https://cloud.vmware.com/) | [VMware Cloud PKS](https://cloud.vmware.com/vmware-cloud-pks) |[VMware Enterprise PKS](https://cloud.vmware.com/vmware-enterprise-pks) | [VMware Enterprise PKS](https://cloud.vmware.com/vmware-enterprise-pks) | [VMware Essential PKS](https://cloud.vmware.com/vmware-essential-pks) | |[VMware Essential PKS](https://cloud.vmware.com/vmware-essential-pks)
| [Z.A.R.V.I.S.](https://zarvis.ai/) | &#x2714; | | | | | |
For a list of [Certified Kubernetes](https://github.com/cncf/k8s-conformance/#certified-kubernetes) providers, see "[Partners](https://kubernetes.io/partners/#conformance)".
{{% /capture %}}