AWS EC2/ASG: Set instance health as unhealthy using API an call

2 min read

If we are running an application on EC2 using an ASG that it's health check fails to properly notify it's status using an HTTP endpoint, if fixing it is not an option, we can create another custom HTTP endpoint to improve the existing, or if the situation cannot be fixed, we can set the instance heath as unhealthy from within the instance itself (or a lambda if needed)

29/08/2022

AWS: How to get the On Demand price of a EC2 instance using Python and Boto3

3 min read

We can use python with Boto3 to retrieve the current On Demand price for a given instance type.

31/05/2022

AWS: How to get the Spot price of EC2 Instances using Python and Boto3

2 min read

Running on spot instances can save us a bunch of money on the cloud. It is based on long-term trends in supply and demand. You'll pay the Spot price that's in effect for the time period your instances are running. We can use boto3 to retrieve the current spot price:

26/05/2022

How to identify when a spot instance receives a termination notice

2 min read

When running spot instances, if AWS needs to reclaim that capacity (or if the current Spot price exceeds our bid price) we will receive a two minutes grace period to be able to save any data we need.

To check is we need to terminate our tasks on the spot instance we can use the instance's metadata

24/05/2022

Indentify whether we are running an spot instance using AWS CLI

2 min read

On a running instance we might want to be able to identify whether it is a spot or on demand instance. We can use awscli to identify it

23/05/2022