Kubernetes v1.12.6-beta.0 和 v1.12.5 发布，容器编排工具

Kubernetes v1.12.6-beta.0 和 v1.12.5 发布了，新版修复了不少 bug。Kubernetes 是一个开源的、用于管理云平台中多个主机上的容器化的应用，Kubernetes 的目标是让部署容器化的应用简单并且高效，Kubernetes 提供了应用部署、规划、更新与维护的一种机制。

v1.12.5 主要更新内容：

• kubectl: fixed an issue with "too old resource version" errors continuously appearing when calling kubectl delete ( #72825 , @liggitt )

• Update Cluster Autoscaler version to 1.12.2. Release notes: https://github.com/kubernetes/autoscaler/releases/tag/cluster-autoscaler-1.12.2 ( #72882 , @aleksandra-malinowska )

• Fix kube-proxy PodSecurityPolicy binding on GCE & GKE. This was only an issue when running kube-proxy as a DaemonSet, with PodSecurityPolicy enabled. ( #72761 , @tallclair )

• Fixes spurious 0-length API responses. ( #72856 , @liggitt )

• client-go: restores behavior of populating the BearerToken field in rest.Config objects constructed from kubeconfig files containing tokenFile config, or from in-cluster configuration. An additional BearerTokenFile field is now populated to enable constructed clients to periodically refresh tokens. ( #71713 , @liggitt )

• Fix AWS NLB security group updates where valid security group ports were incorrectly removed ( #68422 , @kellycampbell )

• when updating a service or when node changes occur.

• Fix scheduling starvation of pods in cluster with large number of unschedulable pods. ( #72619 , @everpeace )

• client-go: shortens refresh period for token files to 1 minute to ensure auto-rotated projected service account tokens are read frequently enough. ( #72437 , @liggitt )

• change azure disk host cache to ReadOnly by default ( #72229 , @andyzhangx )

• Fixes a bug in HPA controller so HPAs are always updated every resyncPeriod (15 seconds). ( #72373 , @krzysztof-jastrzebski )

• Fixes issue with cleaning up stale NFS subpath mounts ( #71804 , @msau42 )

• Fix device mountable volume names in DSW to prevent races in device mountable plugin, e.g. local. ( #71509 , @cofyc )

• Fixes a bug in previous releases where a pod could be placed inside another pod's cgroup when specifying --cgroup-root ( #70678 , @dashpole )

• Fixes issue where subpath volume content was deleted during orphaned pod cleanup for Local volumes that are directories (and not mount points) on the root filesystem. ( #72291 , @msau42 )

• Fix a race condition in the scheduler preemption logic that could cause nominatedNodeName of a pod not to be considered in one or more scheduling cycles. ( #72504 , @bsalamat )

• Fix race condition introduced by graceful termination which can lead to a deadlock in kube-proxy ( #72361 , @lbernail )

• Support graceful termination with IPVS when deleting a service ( #71895 , @lbernail )

• Fixes an issue where Portworx volumes cannot be mounted if 9001 port is already in use on the host and users remap 9001 to another port. ( #70392 , @harsh-px )

• fix race condition when attach azure disk in vmss ( #71992 , @andyzhangx )

• Fixed kubelet reporting "resource name may not be empty" when mounting a volume very quickly after unmount. ( #71074 , @jsafrane )

• Update to use go1.10.7 with fix for CVE-2018-16875 ( #72072 , @ixdy )

• kube-proxy in IPVS mode will stop initiating connections to terminating pods for services with sessionAffinity set. ( #71834 , @lbernail )

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