AZ Create budget alert for few subscriptions.

az-create-budget-alert.sh

subs=(
52zzzzzzzzzzzzzzzzzzzzzzzzzzzzz9b6dd
a2zzzzzzzzzzzzzzzzzzzzzzzzzzzzzz480d
1azzzzzzzzzzzzzzzzzzzzzzzzzzzzzz9a1e
)

##now run
for sub in ${subs[@]}
do
echo "$(date -Is) Now work on $sub"
##create budget via CLI
#sub='a2czzzzzzzzzzzzzzzzzzzzzzzz80d'
emailToNotify='[email protected]'
amount=210

budgetName_suffix='_BudgetAlert'
azapiversion='2024-08-01'
enddatePlusYears=15

##calc some of the values
enddate=$(date -d "`date +%Y%m01` +$enddatePlusYears years" +%Y-%m-%d)
startdate=$(date -d "`date +%Y%m01` " +%Y-%m-%d)

SubName=$(az account subscription show --id $sub --query "[displayName"] -o tsv)
budgetName=$SubName$budgetName_suffix


### Invoke request
az rest --method PUT --url "https://management.azure.com/subscriptions/$sub/providers/Microsoft.Consumption/budgets/$budgetName?api-version=$azapiversion" \
 --body @<(cat <<EOF
{
    "properties": {
        "amount": $amount,
        "category": "cost",
    "notifications": {
      "actual_GreaterThan_85_Percent": {
        "contactEmails": [
          "$emailToNotify"
        ],
        "enabled": true,
        "operator": "GreaterThan",
        "threshold": "85.0"
      },
      "actual_GreaterThan_95_Percent": {
        "contactEmails": [
          "$emailToNotify"
        ],
        "enabled": true,
        "operator": "GreaterThan",
        "threshold": "95.0"
      }
    },
        "timeGrain": "BillingMonth",
        "timePeriod": {
            "endDate": "$enddate",
            "startDate": "$startdate"
        }
    }
}
EOF
) 
done

direct use of AZ REST API due to various issues with the AZ CLI:
Azure/azure-cli#29950
Azure/azure-cli#31435