Kubernetes 1.12.0-rc.2 釋出，容器編排工具
Kubernetes 是一個開源的、用於管理雲平臺中多個主機上的容器化的應用，Kubernetes 的目標是讓部署容器化的應用簡單並且高效，Kubernetes 提供了應用部署、規劃、更新與維護的一種機制。
Changelog since v1.12.0-rc.1
Other notable changes
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Update to use manifest list for etcd image
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Fix Azure nodes power state for InstanceShutdownByProviderID()
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Bump kube-dns to 1.14.13
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Build multi-arch images correctly.
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Update Alpine base image to 3.8.1.
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kubelet: fix grpc timeout in the CRI client
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Update to golang 1.10.4
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kubeadm now uses fat manifests for the kube-dns images
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Update Cluster Autoscaler version to 1.12.0.
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Seeofollow,noindex" target="_blank">https://github.com/kubernetes/autoscaler/releases/tag/1.12.0 for CA release notes.
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kube-proxy restores the *filter table when running in ipvs mode.
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New kubeDNS image fixes an issue where SRV records were incorrectly being compressed. Added manifest file for multiple arch images.
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Drain should delete terminal pods.