Windows Air-Gap Install

Windows Support requires choosing Calico or Flannel as the CNI for the RKE2 cluster.

RKE2 Windows Agent (Worker) Nodes can be used in an air-gapped environment with two different methods. This requires first completing the RKE2 airgap setup.

You can either deploy using the rke2-windows-<BUILD_VERSION>-amd64-images.tar.gz tarball release artifact, or by using a private registry. There are currently three tarball artifacts released for Windows in accordance with our validated Windows versions.

  • rke2-windows-1809-amd64-images.tar.gz

  • rke2-windows-2004-amd64-images.tar.gz

  • rke2-windows-20H2-amd64-images.tar.gz

All files mentioned in the steps can be obtained from the assets of the desired released RKE2 version here.

Prepare the Windows Agent Node

The Windows Server Containers feature needs to be enabled for the RKE2 agent to work.

Open a new Powershell window with Administrator privileges

powershell -Command "Start-Process PowerShell -Verb RunAs"

In the new Powershell window, run the following command.

Enable-WindowsOptionalFeature -Online -FeatureName containers –All

This will require a reboot for the Containers feature to properly function.

Windows Tarball Method

  1. Download the Windows images tarballs and binary from the RKE2 release artifacts list for the version of RKE2 that you are using.

    Using tar.gz image tarballs

    • Windows Server 2019 LTSC (amd64) (OS Build 17763.2061)

       $ProgressPreference = 'SilentlyContinue'
 Invoke-WebRequest https://github.com/rancher/rke2/releases/download/v1.26.10%2Brke2r2/rke2-windows-1809-amd64-images.tar.gz -OutFile /var/lib/rancher/rke2/agent/images/rke2-windows-1809-amd64-images.tar.gz

    • Windows Server SAC 2004 (amd64) (OS Build 19041.1110)

       $ProgressPreference = 'SilentlyContinue'
 Invoke-WebRequest https://github.com/rancher/rke2/releases/download/v1.26.10%2Brke2r2/rke2-windows-2004-amd64-images.tar.gz -OutFile c:/var/lib/rancher/rke2/agent/images/rke2-windows-2004-amd64-images.tar.gz

    • Windows Server SAC 20H2 (amd64) (OS Build 19042.1110)

       $ProgressPreference = 'SilentlyContinue'
 Invoke-WebRequest https://github.com/rancher/rke2/releases/download/v1.26.10%2Brke2r2/rke2-windows-20H2-amd64-images.tar.gz -OutFile c:/var/lib/rancher/rke2/agent/images/rke2-windows-20H2-amd64-images.tar.gz

    Using tar.zst image tarballs

    • Windows Server 2019 LTSC (amd64) (OS Build 17763.2061)

       $ProgressPreference = 'SilentlyContinue'
 Invoke-WebRequest https://github.com/rancher/rke2/releases/download/v1.26.10%2Brke2r2/rke2-windows-1809-amd64-images.tar.zst -OutFile /var/lib/rancher/rke2/agent/images/rke2-windows-1809-amd64-images.tar.zst

    • Windows Server SAC 2004 (amd64) (OS Build 19041.1110)

       $ProgressPreference = 'SilentlyContinue'
 Invoke-WebRequest https://github.com/rancher/rke2/releases/download/v1.26.10%2Brke2r2/rke2-windows-2004-amd64-images.tar.zst -OutFile c:/var/lib/rancher/rke2/agent/images/rke2-windows-2004-amd64-images.tar.zst

    • Windows Server SAC 20H2 (amd64) (OS Build 19042.1110)

       $ProgressPreference = 'SilentlyContinue'
 Invoke-WebRequest https://github.com/rancher/rke2/releases/download/v1.26.10%2Brke2r2/rke2-windows-20H2-amd64-images.tar.zst -OutFile c:/var/lib/rancher/rke2/agent/images/rke2-windows-20H2-amd64-images.tar.zst

    • Use rke2-windows-<BUILD_VERSION>-amd64.tar.gz or rke2-windows-<BUILD_VERSION>-amd64.tar.zst. Zstandard offers better compression ratios and faster decompression speeds compared to pigz.

  2. Ensure that the /var/lib/rancher/rke2/agent/images/ directory exists on the node.

     New-Item -Type Directory c:\usr\local\bin -Force
 New-Item -Type Directory c:\var\lib\rancher\rke2\bin -Force

  3. Copy the compressed archive to /var/lib/rancher/rke2/agent/images/ on the node, ensuring that the file extension is retained.

  4. Install Windows RKE2.

Private Registry Method

As of RKE2 v1.20, private registry support honors all settings from the containerd registry configuration. This includes endpoint override and transport protocol (HTTP/HTTPS), authentication, certificate verification, etc.

Prior to RKE2 v1.20, private registries must use TLS, with a cert trusted by the host CA bundle. If the registry is using a self-signed cert, you can add the cert to the host CA bundle with update-ca-certificates. The registry must also allow anonymous (unauthenticated) access.

  1. Add all the required system images to your private registry. A list of images can be obtained from the .txt file corresponding to each tarball referenced above, or you may docker load the airgap image tarballs, then tag and push the loaded images.

  2. If using a private or self-signed certificate on the registry, add the registry’s CA cert to the containerd registry configuration, or operating system’s trusted certs for releases prior to v1.20.

  3. Install Windows RKE2 using the system-default-registry parameter, or use the containerd registry configuration to use your registry as a mirror for docker.io.

Install Windows RKE2

These steps should only be performed after completing one of either the Tarball Method or Private Registry Method.

  1. Obtain the Windows RKE2 binary file rke2-windows-amd64.exe. Ensure the binary is named rke2.exe and place it in c:/usr/local/bin.

    Invoke-WebRequest https://github.com/rancher/rke2/releases/download/v1.26.10%2Brke2r2/rke2-windows-amd64.exe -OutFile c:/usr/local/bin/rke2.exe

  2. Configure the rke2-agent for Windows.

    New-Item -Type Directory c:/etc/rancher/rke2 -Force
Set-Content -Path c:/etc/rancher/rke2/config.yaml -Value @"
server: https://<server>:9345
token: <token from server node>
"@

    To read more about the config.yaml file, see the Install Options documentation.

  3. Configure your PATH.

    $env:PATH+=";c:\var\lib\rancher\rke2\bin;c:\usr\local\bin"

 "Path",
 [Environment]::GetEnvironmentVariable("Path", [EnvironmentVariableTarget]::Machine) + ";c:\var\lib\rancher\rke2\bin;c:\usr\local\bin",
 [EnvironmentVariableTarget]::Machine)

  4. Start the RKE2 Windows service by running the binary with the desired parameters. Please see the Windows Agent Configuration reference for additional parameters.

    c:\usr\local\bin\rke2.exe agent service --add

    For example, if using the Private Registry Method, your config file would have the following:

    system-default-registry: "registry.example.com:5000"

    The system-default-registry parameter must specify only valid RFC 3986 URI authorities, i.e. a host and optional port.

    If you would prefer to use CLI parameters only instead, run the binary with the desired parameters.

    c:/usr/local/bin/rke2.exe agent --token <> --server <>