Azure spotter

Convert OnDemand VMs to Spot VMs in Azure Virtual Machine Scalesets

1. Covers all Virtual Machine Scalesets within a Subscription, but that can be controlled with environment variable - CONVERT_TO_SPOT and tags
2. For each VMSS, converts all OD VMs to Spot VMs except one OD VM
3. Identifies a OD VM that can be replaced
4. Copies properties for all dependencies - Network Interface, VM, Health Extension and creates a new Spot VM of the same type
5. Then the OD VM is deleted
6. If it can't find the same VM type, it will roll back all changes
7. Azure credentials need to be provided as environment variables
8. CONVERT_TO_SPOT variable can accept three values
   • ALL - This will convert all Virtual Machine Scaleset regardless of its tag
   • TRUE - This will convert only Virtual Machine Scalesets with tag - convert_to_spot = True
   • FALSE - Virtual Machine Scalesets with tag convert_to_spot = False will be skipped, everything else will be converted
9. This task is scheduled to run every hour at the first minute for eg. 9:01, 10:01 and so on

Getting started using Docker

1. Clone the repo

git clone https://github.com/vwake7/azure-spotter

2. Traverse to the azure-spotter directory

cd azure-spotter

3. Build the Docker image

docker build -t azurespot-local-image .

4. If you have another container running with the same name, delete it

docker rm --force azurespot-local

5. Run your docker image

 docker run -d --name azurespot-local \
-e AZURE_TENANT_ID="tenant_id" \
-e AZURE_CLIENT_ID="client_id" \
-e AZURE_CLIENT_SECRET="secret" \
-e AZURE_SUBSCRIPTION_ID="subscription_id" \
-e CONVERT_TO_SPOT="ALL" \
azurespot-local-image

License

This project is licensed under the Apache-2.0 License - see the LICENSE file for details.

Acknowledgments

• This project is built with stackql as the IaC tool and this has helped to simplify the code to a great extent
• This project is inspired by AutoSpotting