97 lines
4.1 KiB
PowerShell
97 lines
4.1 KiB
PowerShell
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<#
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.SYNOPSIS
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Assists with preparing a Windows VM prior to calling kubeadm join
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.DESCRIPTION
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This script assists with joining a Windows node to a cluster.
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- Downloads Kubernetes binaries (kubelet, kubeadm) at the version specified
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- Registers wins as a service in order to run kube-proxy and cni as DaemonSets.
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- Registers kubelet as an nssm service. More info on nssm: https://nssm.cc/
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.PARAMETER KubernetesVersion
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Kubernetes version to download and use
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.EXAMPLE
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PS> .\PrepareNode.ps1 -KubernetesVersion v1.17.0
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#>
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Param(
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[parameter(Mandatory = $true, HelpMessage="Kubernetes version to use")]
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[string] $KubernetesVersion = 'v1.18.5'
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)
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$ErrorActionPreference = 'Stop'
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function DownloadFile($destination, $source) {
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Write-Host("Downloading $source to $destination")
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curl.exe --silent --fail -Lo $destination $source
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if (!$?) {
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Write-Error "Download $source failed"
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exit 1
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}
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}
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if (!$KubernetesVersion.StartsWith("v")) {
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$KubernetesVersion = "v" + $KubernetesVersion
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}
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Write-Host "Using Kubernetes version: $KubernetesVersion"
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$global:Powershell = (Get-Command powershell).Source
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$global:PowershellArgs = "-ExecutionPolicy Bypass -NoProfile"
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$global:KubernetesPath = "$env:SystemDrive\k"
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$global:StartKubeletScript = "$global:KubernetesPath\StartKubelet.ps1"
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$global:NssmInstallDirectory = "$env:ProgramFiles\nssm"
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$kubeletBinPath = "$global:KubernetesPath\kubelet.exe"
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mkdir -force "$global:KubernetesPath"
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$env:Path += ";$global:KubernetesPath"
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[Environment]::SetEnvironmentVariable("Path", $env:Path, [System.EnvironmentVariableTarget]::Machine)
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DownloadFile $kubeletBinPath https://dl.k8s.io/$KubernetesVersion/bin/windows/amd64/kubelet.exe
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DownloadFile "$global:KubernetesPath\kubeadm.exe" https://dl.k8s.io/$KubernetesVersion/bin/windows/amd64/kubeadm.exe
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DownloadFile "$global:KubernetesPath\wins.exe" https://github.com/rancher/wins/releases/download/v0.0.4/wins.exe
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# Create host network to allow kubelet to schedule hostNetwork pods
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Write-Host "Creating Docker host network"
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docker network create -d nat host
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Write-Host "Registering wins service"
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wins.exe srv app run --register
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start-service rancher-wins
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mkdir -force C:\var\log\kubelet
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mkdir -force C:\var\lib\kubelet\etc\kubernetes
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mkdir -force C:\etc\kubernetes\pki
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New-Item -path C:\var\lib\kubelet\etc\kubernetes\pki -type SymbolicLink -value C:\etc\kubernetes\pki\
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$StartKubeletFileContent = '$FileContent = Get-Content -Path "/var/lib/kubelet/kubeadm-flags.env"
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$global:KubeletArgs = $FileContent.Trim("KUBELET_KUBEADM_ARGS=`"")
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$cmd = "C:\k\kubelet.exe $global:KubeletArgs --cert-dir=$env:SYSTEMDRIVE\var\lib\kubelet\pki --config=/var/lib/kubelet/config.yaml --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --hostname-override=$(hostname) --pod-infra-container-image=`"mcr.microsoft.com/k8s/core/pause:1.2.0`" --enable-debugging-handlers --cgroups-per-qos=false --enforce-node-allocatable=`"`" --network-plugin=cni --resolv-conf=`"`" --log-dir=/var/log/kubelet --logtostderr=false --image-pull-progress-deadline=20m"
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Invoke-Expression $cmd'
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Set-Content -Path $global:StartKubeletScript -Value $StartKubeletFileContent
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Write-Host "Installing nssm"
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$arch = "win32"
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if ([Environment]::Is64BitOperatingSystem) {
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$arch = "win64"
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}
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mkdir -Force $global:NssmInstallDirectory
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DownloadFile nssm.zip https://k8stestinfrabinaries.blob.core.windows.net/nssm-mirror/nssm-2.24.zip
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tar C $global:NssmInstallDirectory -xvf .\nssm.zip --strip-components 2 */$arch/*.exe
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Remove-Item -Force .\nssm.zip
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$env:path += ";$global:NssmInstallDirectory"
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$newPath = "$global:NssmInstallDirectory;" +
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[Environment]::GetEnvironmentVariable("PATH", [EnvironmentVariableTarget]::Machine)
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[Environment]::SetEnvironmentVariable("PATH", $newPath, [EnvironmentVariableTarget]::Machine)
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Write-Host "Registering kubelet service"
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nssm install kubelet $global:Powershell $global:PowershellArgs $global:StartKubeletScript
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nssm set kubelet DependOnService docker
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New-NetFirewallRule -Name kubelet -DisplayName 'kubelet' -Enabled True -Direction Inbound -Protocol TCP -Action Allow -LocalPort 10250
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