Install-Containerd.ps1

<#
.SYNOPSIS
Installs ContainerD on a Windows machines in preperation for joining the node to a Kubernetes cluster.

.DESCRIPTION
This script
- Verifies that Windows Features requried for running contianers are enabled (and enables then if they are not)
- Downloads ContainerD binaries from from at the version specified.
- Downloads Windows SND CNI plugins.
- Registers ContainerD as a windows service.

.PARAMETER ContainerDVersion
ContainerD version to download and use.

.PARAMETER netAdapterName
Name of network adapter to use when configuring basic nat network.

.EXAMPLE
PS> .\Install-Conatinerd.ps1

#>

Param(
    [parameter(HelpMessage = "ContainerD version to use")]
    [string] $ContainerDVersion = "1.6.8",
    [parameter(HelpMessage = "Name of network adapter to use when configuring basic nat network")]
    [string] $netAdapterName = "Ethernet"
)

$ErrorActionPreference = 'Stop'

function DownloadFile($destination, $source) {
    Write-Host("Downloading $source to $destination")
    curl.exe --silent --fail -Lo $destination $source

    if (!$?) {
        Write-Error "Download $source failed"
        exit 1
    }
}

$requiredWindowsFeatures = @(
    "Containers")
#    "Hyper-V",
 #   "Hyper-V-PowerShell")

function ValidateWindowsFeatures {
    $allFeaturesInstalled = $true
    foreach ($feature in $requiredWindowsFeatures) {
        $f = Get-WindowsFeature -Name $feature
        if (-not $f.Installed) {
            Write-Warning "Windows feature: '$feature' is not installed."
            $allFeaturesInstalled = $false
        }
    }
    return $allFeaturesInstalled
}

if (-not (ValidateWindowsFeatures)) {
    Write-Output "Installing required windows features..."

    foreach ($feature in $requiredWindowsFeatures) {
        Install-WindowsFeature -Name $feature
    }

    Write-Output "Please reboot and re-run this script."
    exit 0
}

Write-Output "Getting ContainerD binaries"
$global:ConainterDPath = "$env:ProgramFiles\containerd"
mkdir -Force $global:ConainterDPath | Out-Null
DownloadFile "$global:ConainterDPath\containerd.tar.gz" https://github.com/containerd/containerd/releases/download/v${ContainerDVersion}/containerd-${ContainerDVersion}-windows-amd64.tar.gz
tar.exe -xvf "$global:ConainterDPath\containerd.tar.gz" --strip=1 -C $global:ConainterDPath
$env:Path += ";$global:ConainterDPath"
[Environment]::SetEnvironmentVariable("Path", $env:Path, [System.EnvironmentVariableTarget]::Machine)
containerd.exe config default | Out-File "$global:ConainterDPath\config.toml" -Encoding ascii
#config file fixups
$config = Get-Content "$global:ConainterDPath\config.toml"
$config = $config -replace "bin_dir = (.)*$", "bin_dir = `"c:/opt/cni/bin`""
$config = $config -replace "conf_dir = (.)*$", "conf_dir = `"c:/etc/cni/net.d`""
$config | Set-Content "$global:ConainterDPath\config.toml" -Force 

Write-Output "Registering ContainerD as a service"
containerd.exe --register-service

Write-Output "Starting ContainerD service"
Start-Service containerd

Write-Output "Done - please remember to add '--cri-socket `"npipe:////./pipe/containerd-containerd`"' to your kubeadm join command if your kubernetes version is below 1.25!"