add kubesphere to platform-setup solutions (#6424)

* add kubesphere to platform-setup solutions

Signed-off-by: FeynmanZhou <pengfeizhou@yunify.com>

* refine kubesphere guide

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* refactor kubesphere platform setup guide, remove translations

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* remove weight changes from IBM cloud

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* add words to .spelling to fix lint CI

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* fix spelling error

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* add words to .spelling

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* refine kubesphere.md, remove redundant words from .spelling

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* fix lint_check error

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* fix Unordered list indentation error

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* fix Unordered list indentation error - line 20

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* add 4 spaces to fix Unordered list indentation error

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* change weight, fix unordered list error

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

* refine kubesphere.md

Signed-off-by: FeynmanZhou <zpf0610@gmail.com>

.spelling

@@ -123,6 +123,7 @@ canaried
 canarying
 CAs
 CDNs
+CentOS
 Chrony
 CIDRs
 Cilium
@@ -339,6 +340,7 @@ Kubelet
 kubelet
 Kubernetes
 kubernetes.default
+KubeSphere
 L3-4
 L4-L6
 learnings

content/en/docs/setup/platform-setup/gardener/index.md

@@ -1,7 +1,7 @@
 ---
 title: Kubernetes Gardener
 description: Instructions to setup a Gardener cluster for Istio.
-weight: 19
+weight: 18
 aliases:
     - /docs/setup/kubernetes/platform-setup/gardener/
 skip_seealso: true

content/en/docs/setup/platform-setup/kubesphere/index.md

@@ -0,0 +1,70 @@
+---
+title: KubeSphere Container Platform
+description: Instructions to setup a KubeSphere Container Platform for Istio.
+weight: 19
+skip_seealso: true
+keywords: [platform-setup,kubesphere,kubernetes]
+---
+
+Follow these instructions to prepare the [KubeSphere Container Platform](https://github.com/kubesphere/kubesphere) for Istio. You can download KubeSphere to easily install a Kubernetes cluster on your Linux machines.
+
+{{< tip >}}
+KubeSphere provides [All-in-One](https://kubesphere.io/docs/v2.1/en/installation/all-in-one/) and [Multi-Node](https://kubesphere.io/docs/v2.1/en/installation/multi-node/) installations. This enables quick setup and manages Kubernetes and Istio in a unified web console. This tutorial will walk you through the All-in-One installation. Reference [Multi-node Installation](https://kubesphere.io/docs/v2.1/en/installation/multi-node/) for further information.
+{{< /tip >}}
+
+## Prerequisites
+
+A Linux machine that is either a virtual machine or bare metal. This machine requires at a minimum:
+
+- Hardware:
+
+    - CPU: at least 2 Cores
+    - Memory: at least 4 `GB`
+
+- Operating Systems:
+
+    - CentOS 7.4 ~ 7.7 (`64-bit`)
+    - Ubuntu 16.04/18.04 LTS (`64-bit`)
+    - RHEL 7.4 (`64-bit`)
+    - Debian Stretch 9.5 (`64-bit`)
+
+{{< tip >}}
+Ensure your firewall meets the [port requirements](https://kubesphere.io/docs/v2.1/en/installation/port-firewall/). If this is not immediately feasible, you may evaluate Istio and KubeSphere by disabling the firewall as documented in your distribution.
+{{< /tip >}}
+
+## Provisioning a Kubernetes cluster
+
+1. Download KubeSphere to your Linux machine, it will create a standard Kubernetes cluster (1.15 by default, KubeSphere also supports 1.13 and 1.14):
+
+    {{< text bash >}}
+    $ curl -L https://kubesphere.io/download/stable/v2.1.0 > installer.tar.gz
+    $ tar -xzf installer.tar.gz
+    $ cd kubesphere-all-v2.1.0/scripts
+    {{< /text >}}
+
+1. Execute the installation script. Select the **"1) All-in-one"** option when prompted:
+
+    {{< text bash >}}
+    $ ./install.sh
+    {{< /text >}}
+
+1. Installation may take 15 ~ 20 minutes. Wait until all pods are running. Access the console using the account information obtained from the installation logs:
+
+    {{< text plain >}}
+    #####################################################
+    ###              Welcome to KubeSphere!           ###
+    #####################################################
+    Console: http://192.168.0.8:30880
+    Account: admin
+    Password: It will be generated by KubeSphere Installer
+    {{< /text >}}
+
+    {{< tip >}}
+    At the same time, Kubernetes 1.15 has been installed into your environment.
+    {{< /tip >}}
+
+    ![KubeSphere Console](images/kubesphere-console.png)
+
+## Enable installing Istio on Kubernetes
+
+KubeSphere will install Istio within Kubernetes. Reference [Enable Service Mesh](https://kubesphere.io/docs/v2.1/en/installation/install-servicemesh/) for further information.