主要更新和釋出的主題

1. Kubernetes now supports up to 5,000 nodes via etcd v3, which is enabled by default.
   Kubernetes支援5000+節點通過etcd v3,並預設使用v3
2. Role-based access control (RBAC) has graduated to beta, and defines secure default roles for control plane, node, and controller components.
   基於角色的訪問控制進入beta版本。
3. The kubeadm cluster bootstrap tool has graduated to beta. Some highlights:
   kubeadm叢集工具升級到beta版本
   
   
   • All communication is now over TLS
   • Authorization plugins can be installed by kubeadm, including the new default of RBAC
   • The bootstrap token system now allows token management and expiration
4. The kubefed federation bootstrap tool has also graduated to beta.
   kubefed也到了beta版本
5. Interaction with container runtimes is now through the CRI interface, enabling easier integration of runtimes with the kubelet. Docker remains the default runtime via Docker-CRI (which moves to beta).
   與容器執行時互動使用CRI介面，使執行時更容易與kubelet整合。預設使用beta版本的Docker-CRI
6. Various scheduling features have graduated to beta:
   以下排程功能進入beta版本
   
   • You can now use multiple schedulers
     可以使用多個scheduler
   • Nodes and pods now support affinity and anti-affinity
   • Advanced scheduling can be performed with taints and tolerations
7. You can now specify (per pod) how long a pod should stay bound to a node, when there is a node problem.
   可以指定pod繫結到某個節點的時間當節點出現問題。
8. Various storage features have graduated to GA:
   儲存功能進入GA
   
   • StorageClass pre-installed and set as default on Azure, AWS, GCE, OpenStack, and vSphere
     StorageClass預先安裝 Azure, AWS, GCE, OpenStack, and vSphere
   • Configurable Dynamic Provisioning and StorageClass
     動態配置StorageClass
9. DaemonSets can now be updated by a rolling update.
   現在可以滾動更新DaemonSets

詳細更細說明：