Get possible reserved instances in a subscription by region

Below is a little script that returns all possible reserved instances in a region for a subscription

Prerequisites:

• Be connected to AZ via an “az login” command
• The script takes for argument the target subscription id for which we want the possible reservations

The script lists the possible reserved instances in a subscription by first listing the available regions for a subscription then looping through them to get the possible instance reservations.

To run the script:

• Create a file possible-reserved-instances.sh and copy in it below code:

 #!/bin/bash
 SUBSCRIPTION_ID=$1
 
 az account set -s "$SUBSCRIPTION_ID"
 az account list-locations --query "[].{Name:name}" -o table>regions-list
 sed -i -e '1,2d' regions-list
 while read REGION; do
   echo 'Reservations for region "'"$REGION"'" are available in ./regions/'"$REGION"
   az reservations catalog show --reserved-resource-type "VirtualMachines" --location "$REGION"  --subscription-id "$SUBSCRIPTION_ID" > output.json --only-show-errors>./regions/"$REGION"
 done 

• Add relevant permissions to run the script

chmod +x possible-reserved-instances.sh

• Launch script

./test-reserved.sh xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx