How to change the EC2 instance types in a Elastic Beanstalk environment programmatically?

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I want to use boto3 to change the EC2 instance types in an Elastic Beanstalk environment.

However, I can't find the correct function to do that.

update_environment doesn't seem to provide the ability to change EC2 instance type.

All the update_* functions don't seem to provide this functionality.

My Environment type is Load balanced, and I use Combine purchase options and instances for Fleet composition.

Anyone knows how to change the instance types used by elastic beanstalk?

amazon-elastic-beanstalk boto3 amazon-web-services python
1 Answers

You can use update_environment to update instance type.

Verified example (i.e. I used it on my own EB env):

import boto3

eb = boto3.client('elasticbeanstalk')

response = eb.update_environment(
    ApplicationName='<your-eb-app-name>',
    EnvironmentName='<your-eb-env-name>',
    OptionSettings=[
        {
            'Namespace': 'aws:autoscaling:launchconfiguration',
            'OptionName': 'InstanceType',
            'Value': 't2.small'
        },
    ]
)

print(response)

Update for spot

The spot settings for EB env are set using aws:ec2:instances.

response = eb.update_environment(
    ApplicationName='<your-eb-app-name>',
    EnvironmentName='<your-eb-env-name>',
    OptionSettings=[
        {
            'Namespace': 'aws:ec2:instances',
            'OptionName': 'EnableSpot',
            'Value': 'true'
        },
        {
            'Namespace': 'aws:ec2:instances',
            'OptionName': 'InstanceTypes',
            'Value': 't2.large,t3.large'
        }      
    ]
)

There are more options to be set, which depend on your exact requirements.

user_2488230
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