1. Log in to your AWS Management Console.
2. Navigate to the EC2 Dashboard.
3. Click on the “Reserved Instances” link in the left-hand menu.
4. In the “Reserved Instances” page, you will see a list of your reserved instances.
5. Look for the instances that have lease expiration in the next 7 days.
6. Select the instance by clicking on the checkbox in front of it.
7. Click on the “Modify Reserved Instances” button.
8. In the “Modify Reserved Instances” page, you can choose to either modify the instance or exchange it for a new one.
9. If you choose to modify the instance, you can change the instance type, availability zone, or platform.
10. If you choose to exchange the instance, you can select a new instance type, availability zone, or platform.
11. Once you have made your changes, click on the “Preview” button to review your changes.
12. If you are satisfied with your changes, click on the “Modify Reserved Instances” button to apply the changes.

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1. Open the AWS CLI on your local machine.
2. Run the following command to get a list of all the reserved instances that have an expiration date within the next 7 days:

aws ec2 describe-reserved-instances --filters "Name=state,Values=active" "Name=product-description,Values=*Linux/UNIX*" "Name=scope,Values=Availability Zone" --query 'ReservedInstances[*].[ReservedInstancesId,InstanceType,AvailabilityZone,InstanceCount,Start,End,Duration,State,Tags[?Key==`Name`].Value|[0]]' --output table --region <region>

3. Identify the instance that requires remediation.
4. Run the following command to modify the reservation period:

aws ec2 modify-reserved-instances --reserved-instances-id <reservation_id> --target-configuration "InstanceCount=<count>,End=`date -d '+1 year' +%Y-%m-%d`" --region <region>

5. Verify that the reservation has been modified by running the first command again and checking that the expiration date is now more than 7 days away.

1. Import the necessary AWS SDK boto3:

import boto3

2. Create an EC2 client object:

ec2 = boto3.client('ec2')

3. Use the describe_reserved_instances() method to get the list of all reserved instances:

reserved_instances = ec2.describe_reserved_instances()

4. Loop through the list of reserved instances and check if any of them are expiring within the next 7 days:

for reserved_instance in reserved_instances['ReservedInstances']:
    expiration_time = reserved_instance['End']
    remaining_days = (expiration_time.date() - datetime.date.today()).days
    if remaining_days <= 7:
        # Do something to remediate the issue

5. To remediate the issue, you can either renew the reserved instance or purchase a new one. To renew the reserved instance, use the modify_reserved_instances() method:

response = ec2.modify_reserved_instances(
    ReservedInstancesIds=[
        'string',
    ],
    TargetConfigurations=[
        {
            'AvailabilityZone': 'string',
            'InstanceCount': 123,
            'InstanceType': 'string',
            'Platform': 'string',
            'Scope': 'string'
        },
    ]
)

6. Alternatively, you can purchase a new reserved instance using the purchase_reserved_instances_offering() method:

response = ec2.purchase_reserved_instances_offering(
    InstanceCount=123,
    ReservedInstancesOfferingId='string',
    DryRun=True|False,
    LimitPrice={
        'Amount': 'string',
        'CurrencyCode': 'string'
    }
)

7. Finally, you can schedule a Lambda function to run this script periodically and remediate the issue automatically.