AKS ARM template | Query - azure-aks

Question

I am working to build an AKS cluster using ARM template. i have a situation where if i define OS Type to Windows, template should populate "WindowsProfile" and if i choose linux in OS type then it should populate linuxprofile.
here is the template with linux profile chosen, if i provide parameter OSType value to windows, how do i insert windowsprofile here.
"name": "[parameters('AKSClustername')]",
"type": "Microsoft.ContainerService/managedClusters",
"apiVersion": "2021-05-01",
"location": "[parameters('Region')]",
"properties": {
"kubernetesVersion": "[parameters('kubernetesversion')]",
"dnsPrefix": "dnsprefix",
"agentPoolProfiles": [
{
"name": "[parameters('agentPoolName')]",
"count": "[parameters('nodeCount')]",
"vmSize": "[parameters('vmSize')]",
"osType": "[parameters('OSType')]",
"storageProfile": "ManagedDisks",
"enableAutoScaling": "[parameters('autoscalepools')]",
// "availabilityZones": "[if(equals(parameters('availabilityZones'), bool('true')), variables('AVZone'), json('null'))]"
"availabilityZones": "[if(equals(parameters('availabilityZones'), or('1', '2', '3')), variables('AVZone'), json('null'))]"
}
],
"linuxProfile": {
"adminUsername": "adminUserName",
"ssh": {
"publicKeys": [
{
"keyData": "keyData"
}
]
}
},

Answer 1

To be honest it won't be really readable, maintainable with ARM Template.
I would suggest you to have a look at Bicep.
It will compile to ARM template but will be more readable. Using bicep you would be able to do something like that:
//main.bicep
param AKSClustername string
param Region string
param kubernetesversion string
param agentPoolName string
param nodeCount int
param vmSize string
param OSType string
param autoscalepools bool
// Define common properties
var baseProperties = {
kubernetesVersion: kubernetesversion
dnsPrefix: 'dnsprefix'
agentPoolProfiles: [
{
name: agentPoolName
count: nodeCount
vmSize: vmSize
osType: OSType
storageProfile: 'ManagedDisks'
enableAutoScaling: autoscalepools
}
]
}
// Add profile based on OSType
var propertiesWithOsProfile = union(baseProperties, OSType == 'Linux' ? {
linuxProfile: {
adminUsername: 'adminUserName'
ssh: {
publicKeys: [
{
keyData: 'keyData'
}
]
}
}
} : {
windowsProfile: {
adminPassword: ''
adminUsername: ''
licenseType: 'Windows_Server'
}
}
)
// Create the cluster
resource aks 'Microsoft.ContainerService/managedClusters#2021-05-01' = {
name: AKSClustername
location: Region
properties: propertiesWithOsProfile
}
Both Azure CLI and Powershell supports Bicep.
If you do need to generate an ARM template, you could run this command
az bicep build --file main.bicep
It will generate an ARM template for you.