Azure bicep Storage account sku is read-only - azure-devops

Question

I am trying to deploy a storage account using azure bicep.
In my code:
resource storageAccounts_storageacntin_name_default 'Microsoft.Storage/storageAccounts/blobServices#2021-04-01' = {
parent: storageAccounts_storageacntin_name_resource
name: 'default'
sku: {
name: 'Standard_RAGRS'
tier: 'Standard'
}
properties: {
changeFeed: {
enabled: false
}
restorePolicy: {
enabled: false
}
containerDeleteRetentionPolicy: {
enabled: true
days: 7
}
cors: {
corsRules: []
}
deleteRetentionPolicy: {
enabled: true
days: 30
}
isVersioningEnabled: true
}
}
I get an error in the SKU. The error is the following.
The property "sku" is read-only. Expressions cannot be assigned to read-only properties.bicep(BCP073)
I don't fully understand why is this error showing up, I am still new to azure bicep and trying to move slowly from terraform deployments to azure bicep.
Please can anyone explain me why is this error is coming up and how to solve it?
Thank you so much
UPDATE CODE:
this is the error I am getting when I removed the sku
param storageAccounts array = [
'storage1'
]
resource storage_Accounts 'Microsoft.Storage/storageAccounts#2021-04-01' = [ for storageName in storageAccounts :{
name: [storageName]
location: 'westeurope'
sku: {
name: 'Standard_RAGRS'
tier: 'Standard'
}
kind: 'StorageV2'
properties: {
allowCrossTenantReplication: true
minimumTlsVersion: 'TLS1_2'
allowBlobPublicAccess: false
allowSharedKeyAccess: true
networkAcls: {
bypass: 'AzureServices'
virtualNetworkRules: []
ipRules: []
defaultAction: 'Allow'
}
supportsHttpsTrafficOnly: true
encryption: {
services: {
file: {
keyType: 'Account'
enabled: true
}
blob: {
keyType: 'Account'
enabled: true
}
}
keySource: 'Microsoft.Storage'
}
accessTier: 'Hot'
}
}]
resource storageAccounts_hamzaelaouane1_name_default 'Microsoft.Storage/storageAccounts/blobServices#2021-04-01' = [ for storageName in storageAccounts: {
parent: [storage_Accounts]
name: storageName
properties: {
changeFeed: {
enabled: false
}
restorePolicy: {
enabled: false
}
containerDeleteRetentionPolicy: {
enabled: true
days: 7
}
cors: {
corsRules: []
}
deleteRetentionPolicy: {
enabled: true
days: 30
}
isVersioningEnabled: true
}
}
]
the error is at the last 2 lines. It says that is expecting } and ] at that point. Checking line by line, I couldn't see any error on syntax

Answer 1

The sku field is read-only for services that are under a storage account like blobServices and fileServices.
You can (only) set the SKU on Storage Account level (Microsoft.Storage/storageAccounts#2021-04-01).
To be complete; the tier field is also read-only on the storage account, since it's based on the SKU name. Remove these fields and you should be good to go.