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Add option to override the hostname for kubeadm #321

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Jun 21, 2023
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Add option to override the hostname for kubeadm #321

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9 changes: 7 additions & 2 deletions hostprocess/PrepareNode.ps1
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Original file line number Diff line number Diff line change
Expand Up @@ -11,14 +11,19 @@ This script assists with joining a Windows node to a cluster.
.PARAMETER KubernetesVersion
Kubernetes version to download and use

.PARAMETER HostnameOverride
Overrides the hostname for kubeadm. Defaults to the value determined by the hostname command.

.EXAMPLE
PS> .\PrepareNode.ps1 -KubernetesVersion v1.25.3

#>

Param(
[parameter(Mandatory = $true, HelpMessage="Kubernetes version to use")]
[string] $KubernetesVersion
[string] $KubernetesVersion,
[parameter(HelpMessage="Hostname override for kubeadm")]
[string] $HostnameOverride = "$(hostname)"
)
$ErrorActionPreference = 'Stop'

Expand Down Expand Up @@ -63,7 +68,7 @@ New-Item -path C:\var\lib\kubelet\etc\kubernetes\pki -type SymbolicLink -value C
# dockershim related flags (--image-pull-progress-deadline=20m and --network-plugin=cni) are removed in k8s v1.24
# Link to changelog: https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.24.md

$cmd_commands=@("C:\k\kubelet.exe ", '$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/oss/kubernetes/pause:3.6`" ', "--enable-debugging-handlers ", "--cgroups-per-qos=false ", '--enforce-node-allocatable=`"`" ', '--resolv-conf=`"`" ')
$cmd_commands=@("C:\k\kubelet.exe ", '$global:KubeletArgs ', '--cert-dir=$env:SYSTEMDRIVE\var\lib\kubelet\pki ', "--config=/var/lib/kubelet/config.yaml ", "--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf ", "--kubeconfig=/etc/kubernetes/kubelet.conf ", "--hostname-override=$HostnameOverride ", '--pod-infra-container-image=`"mcr.microsoft.com/oss/kubernetes/pause:3.6`" ', "--enable-debugging-handlers ", "--cgroups-per-qos=false ", '--enforce-node-allocatable=`"`" ', '--resolv-conf=`"`" ')
[version]$CurrentVersion = $($KubernetesVersion.Split("v") | Select -Index 1)
[version]$V1_24_Version = '1.24'
if ($CurrentVersion -lt $V1_24_Version) {
Expand Down