update readme to 3.00.

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

README.md

@@ -51,112 +51,65 @@ KubeSphere uses a loosely-coupled architecture that separates the [frontend](htt
 |Feature|Description|
 |---|---|
 | Provisioning Kubernetes Cluster|Support deploy Kubernetes on your infrastructure out of box, including online and air gapped installation|
+| Multi-cluster Management | Provide a centralized control plane to manage multiple Kubernetes Clusters, support application distribution across multiple clusters and cloud providers|
 | Kubernetes Resource Management | Provide web console for creating and managing Kubernetes resources, with powerful observability including monitoring, logging, events, alerting and notification |
 | DevOps System | Provide out-of-box CI/CD based on Jenkins, and offers automated workflow tools including binary-to-image (B2I) and source-to-image (S2I) |
 | Application Store | Provide application store for Helm-based applications, and offers application lifecycle management |
 | Service Mesh (Istio-based) | Provide fine-grained traffic management, observability and tracing for distributed microservice applications, provides visualization for traffic topology |
-| Rich Observability | Provide multi-dimensional monitoring metrics, and provides multi-tenant log query and collection, support alerting and notification for both application and infrastructure |
+| Rich Observability | Provide multi-dimensional monitoring metrics, and provides multi-tenant logging, events and [auditing](https://kubernetes.io/docs/tasks/debug-application-cluster/audit/) management, support alerting and notification for both application and infrastructure |
 | Multi-tenant Management | Provide unified authentication with fine-grained roles and three-tier authorization system, supports AD/LDAP authentication |
 | Infrastructure Management | Support node management and monitoring, and supports adding new nodes for Kubernetes cluster |
-| Storage Support | Support GlusterFS, CephRBD, NFS, Local (default) etc. open source storage solutions, provide CSI plugins to consume storage from cloud providers |
-| Network Support | Support Calico, Flannel, etc. open source network solutions, provides load balancer plug-in [Porter](https://github.com/kubesphere/porter) for Kubernetes installed on physical machines |
+| Storage Support | Support GlusterFS, CephRBD, NFS, LocalPV (default), etc. open source storage solutions, provides CSI plugins to consume storage from cloud providers |
+| Network Support | Support Calico, Flannel, etc., provides [Network Policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/) management, and load balancer plug-in [Porter](https://github.com/kubesphere/porter) for bare metal.|
 | GPU Support | Support add GPU node, support vGPU, enables running ML applications on Kubernetes, e.g. TensorFlow |
 
-Please See the [Feature and Benefits](https://kubesphere.io/docs/introduction/features/) for further information.
+Please see the [Feature and Benefits](https://kubesphere.io/docs/introduction/features/) for further information.
 
 ----
 
 ## Latest Release
 
-KubeSphere 2.1.1 was released on **February 23rd, 2020**. See the [Release Notes For 2.1.1](https://kubesphere.io/docs/release/release-v211/) for the updates.
+KubeSphere 3.0.0 is now generally available! See the [Release Notes For 3.0.0](https://kubesphere.io/docs/release/release-v300/) for the updates.
 
 ## Installation
 
 KubeSphere can run anywhere from on-premise datacenter to any cloud to edge. In addition, it can be deployed on any version-compatible running Kubernetes cluster.
 
-### Deploy on Existing Kubernetes Cluster
+### QuickStarts
 
-#### Prerequisites
+[Quickstarts](https://kubesphere.io/docs/quick-start/) include six hands-on lab exercises that help you quickly get started with KubeSphere.
 
-- `Kubernetes version`： `1.15.x, 1.16.x, 1.17.x`
-- `2.10.0 ≤ Helm Version ＜ 3.0.0` excluding 2.16.0 because of [#6894](https://github.com/helm/helm/issues/6894). Please see [Install and Configure Helm in Kubernetes](https://devopscube.com/install-configure-helm-kubernetes/). Helm v3 will be supported in KubeSphere 3.0.0.
-- An existing Storage Class in your Kubernetes cluster, use `kubectl get sc` to verify it
-- The CSR signing feature is activated in kube-apiserver, see [RKE installation issue](https://github.com/kubesphere/kubesphere/issues/1925#issuecomment-591698309).
+### Installing on Existing Kubernetes Cluster
 
-Install KubeSphere using kubectl.
+- [Installing KubeSphere on Amazone EKS](https://kubesphere.io/docs/installing-on-kubernetes/hosted-kubernetes/install-kubesphere-on-eks/)
+- [Installing KubeSphere on Google GKE](https://kubesphere.io/docs/installing-on-kubernetes/hosted-kubernetes/install-kubesphere-on-aks/)
+- [Installing KubeSphere on Azure AKS](https://kubesphere.io/docs/installing-on-kubernetes/hosted-kubernetes/install-kubesphere-on-aks/)
+- [Installing KubeSphere on DigitalOcean](https://kubesphere.io/docs/installing-on-kubernetes/hosted-kubernetes/install-kubesphere-on-do/)
+- [Installing KubeSphere on Oracle](https://kubesphere.io/docs/installing-on-kubernetes/hosted-kubernetes/install-kubesphere-on-oke/)
+- [Installing KubeSphere on KubeSphere](https://kubesphere.io/docs/installing-on-kubernetes/hosted-kubernetes/install-ks-on-tencent-tke/)
+- [Installing KubeSphere on Huaweicloud CCE](https://kubesphere.io/docs/installing-on-kubernetes/hosted-kubernetes/install-ks-on-huawei-cce/)
 
-- If there are 1 Core and 2 GB RAM available in your cluster, use the command below to set up a default minimal installation only. You can enable other components after installation if more resource added in later on. See [Pluggable Components Installation](https://kubesphere.io/docs/installation/pluggable-components/) for detailed information.
+### Installing on Linux
 
-```bash
-kubectl apply -f https://raw.githubusercontent.com/kubesphere/ks-installer/master/kubesphere-minimal.yaml
-```
-
-- If there are 8 Cores and 16 GB RAM available in your cluster, use the command below to install a complete KubeSphere, i.e. with all components enabled:
-
-```bash
-kubectl apply -f https://raw.githubusercontent.com/kubesphere/ks-installer/master/kubesphere-complete-setup.yaml
-```
-
-Wait the installation logs using the following command till showing `"Successful"`, then you can log in the console using the default username and password.
-
-```bash
-kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l app=ks-install -o jsonpath='{.items[0].metadata.name}') -f
-```
-
-### Deploy on Linux
-
-KubeSphere Installer can help you to install KubeSphere and Kubernetes on your linux machines. It provides [All-in-One](https://kubesphere.io/docs/installation/all-in-one/) and [Multi-Node](https://kubesphere.io/docs/installation/multi-node/) installation options.
-
-#### Minimum Requirements
-
-- Operating Systems
-  - CentOS 7.4~7.7 (64 bit)
-  - Ubuntu 16.04/18.04 LTS (64 bit)
-  - Red Hat Enterprise Linux Server 7.4 (64 bit)
-  - Debian Stretch 9.5 (64 bit)
-- Hardware
-  - CPU：2 Cores,  Memory：4 GB, Disk Space：100 GB
-
-> Note:  Please disable the firewall, or ensure your firewall meets the [port requirements](https://kubesphere.io/docs/installation/port-firewall/).
-
-#### All-in-One (QuickStart)
-
-```bash
-curl -L https://kubesphere.io/download/stable/latest > installer.tar.gz \
-&& tar -zxf installer.tar.gz && cd kubesphere-all-v2.1.1/scripts
-$ ./install.sh
-```
-
-Choose `"1) All-in-one"` to start the default minimal installation.
-
-You can enable other components after installation, see [Pluggable Components Installation](https://kubesphere.io/docs/installation/pluggable-components/).
-
-## To start using KubeSphere
-
-- KubeSphere Documentation ([En](https://kubesphere.io/docs/)/[中](https://kubesphere.io/docs/zh-CN/)）
-- [API Documentation](https://kubesphere.io/docs/api-reference/api-docs/)
+- [Installing KubeSphere on Azure VM](https://https://kubesphere.io/docs/installing-on-linux/public-cloud/install-ks-on-azure-vms/)
+- [Installing KubeSphere on VMware vSphere](https://https://kubesphere.io/docs/installing-on-linux/on-premises/install-kubesphere-on-vmware-vsphere/)
+- [Installing KubeSphere on QingCloud Instance](https://https://kubesphere.io/docs/installing-on-linux/public-cloud/kubesphere-on-qingcloud-instance/)
+- [Installing on Alibaba Cloud ECS](https://https://kubesphere.io/docs/installing-on-linux/public-cloud/install-kubesphere-on-ali-ecs/)
+- [Installing on Huaweicloud VM](https://https://kubesphere.io/docs/installing-on-linux/public-cloud/install-ks-on-huaweicloud-ecs/)
 
 ## Contributing, Support, Discussion, and Community
 
-This [community](https://github.com/kubesphere/community) walks you through how to get started contributing KubeSphere. The [development guide](https://github.com/kubesphere/community/tree/master/developer-guide/development) explains how to set up development environment.
+We :heart: your contribution. The [community](https://github.com/kubesphere/community) walks you through how to get started contributing KubeSphere. The [development guide](https://github.com/kubesphere/community/tree/master/developer-guide/development) explains how to set up development environment.
 
-If you need any help with KubeSphere, please join us at [Slack Channel](https://join.slack.com/t/kubesphere/shared_invite/enQtNTE3MDIxNzUxNzQ0LTZkNTdkYWNiYTVkMTM5ZThhODY1MjAyZmVlYWEwZmQ3ODQ1NmM1MGVkNWEzZTRhNzk0MzM5MmY4NDc3ZWVhMjE).
-
-We also communicate through [Google Group](https://groups.google.com/forum/#!forum/kubesphere).
+- [Slack Channel](https://join.slack.com/t/kubesphere/shared_invite/enQtNTE3MDIxNzUxNzQ0LTZkNTdkYWNiYTVkMTM5ZThhODY1MjAyZmVlYWEwZmQ3ODQ1NmM1MGVkNWEzZTRhNzk0MzM5MmY4NDc3ZWVhMjE)
+- [Youtube](https://www.youtube.com/channel/UCyTdUQUYjf7XLjxECx63Hpw)
+- [Follow us on Twitter](https://twitter.com/KubeSphere)
 
 Please submit any KubeSphere bugs, issues, and feature requests to [KubeSphere GitHub Issue](https://github.com/kubesphere/kubesphere/issues).
 
 ## Who are using KubeSphere
 
-The [Powered by KubeSphere](https://kubesphere.io/case/) page includes the user list of the project. You can submit your institution name and homepage if you are using KubeSphere.
-
-## RoadMap
-
-Currently, KubeSphere has released the following 5 major editions. The future releases include multicluster, big data, AI, SDN, etc. See [Plans for 2.1.1 and 3.0.0](https://github.com/kubesphere/kubesphere/issues/1368) for more details.
-
-**Express Edition** => **v1.0.x** => **v2.0.x**  => **v2.1.0** => **v2.1.1** => **v3.0.0**
-
-![Roadmap](https://pek3b.qingstor.com/kubesphere-docs/png/20190926000413.png)
+The [user case studies](https://kubesphere.io/case/) page includes the user list of the project. You can [submit a PR](https://github.com/kubesphere/kubesphere/blob/master/docs/powered-by-kubesphere.md) to add your institution name and homepage if you are using KubeSphere.
 
 ## Landscapes