如何在Windows Server 2019上安装Kubernetes？预览版功能咨询

Hey Benjamin, totally get the confusion here—when that preview dropped, Microsoft’s docs were a bit scattered, and the feature wasn’t exactly "turnkey" out of the box. Let’s break this down clearly:

First, to answer your last question: Kubernetes support was announced for Windows Server 2019, but in the early preview builds, it was a hidden technical preview feature that required manual setup—it wasn’t enabled by default, which is why you couldn’t find it right away.

Here’s a step-by-step guide that should work for your Hyper-V VM with Desktop Experience:

Prerequisites #

• Make sure your Windows Server 2019 Preview VM is running the latest preview build (Slow or Fast Ring). Run this in an elevated PowerShell to force updates:

  wuauclt /detectnow /updatenow
  

• Enable nested virtualization on your Hyper-V VM (critical for containers/K8s to work properly). On your host machine’s PowerShell:

  Set-VMProcessor -VMName "Your VM Name" -ExposeVirtualizationExtensions $true
  

  Then restart the VM.

Step 1: Enable Required Windows Features #

Open an elevated PowerShell on your VM and run these commands:

1. Install the Containers feature:

   Install-WindowsFeature -Name Containers -IncludeManagementTools
   

2. Enable the Kubernetes technical preview component:

   Enable-WindowsOptionalFeature -Online -FeatureName Containers-Kubernetes -All
   

3. Restart the VM to apply changes:

   Restart-Computer -Force
   

Step 2: Initialize the Kubernetes Cluster #

After the VM restarts, open another elevated PowerShell:

1. Initialize the control plane (this sets up a single-node cluster, which was the only supported setup in early previews):

   kubeadm init --pod-network-cidr=10.244.0.0/16
   

2. Configure kubectl for your user account:

   mkdir -p $HOME/.kube
   Copy-Item -Path /etc/kubernetes/admin.conf -Destination $HOME/.kube/config
   Set-ItemProperty -Path $HOME/.kube/config -Name IsReadOnly -Value $false
   

Step 3: Install a Pod Network Plugin #

Windows nodes in early previews only supported specific network plugins—Flannel was the most reliable option:

1. Obtain the Flannel configuration file (kube-flannel.yml) optimized for Windows nodes (this file is available in the official Flannel project resources).
2. Apply the config to your cluster using:

   kubectl apply -f kube-flannel.yml
   

3. Wait 5-10 minutes, then verify all pods are running:

   kubectl get pods --all-namespaces
   

Common Gotchas to Watch For #

• If you get an error that the Containers-Kubernetes feature doesn’t exist, your preview build is too old. Grab the latest Windows Server 2019 Preview ISO and redeploy your VM.
• Early previews only supported single-node clusters. Multi-node Windows K8s support came later in the preview cycle.
• Make sure your VM has at least 4GB of RAM—Kubernetes and containers need a decent amount of resources to run smoothly.

Hope this gets you up and running!

内容的提问来源于stack exchange，提问作者Benjamin Abt