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Instead of saving to new AMI, can you stop the instance, and change instance type?
There may be some steps involved. Refer to What steps do I need to take before changing the instance type of my EC2 Linux instance?
There are a few issues at play here that are causing the problems you're experiencing:
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Instance Type Compatibility: The error message you received when trying to launch an x2iezn.2xlarge instance from your saved AMI suggests that the AMI is not compatible with that instance type. This is likely because the m3.2xlarge instance you originally used is an older generation instance, while x2iezn.2xlarge is a newer generation. The AMI created from the m3.2xlarge may not have the necessary drivers or configurations to support the newer instance type.
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AMI Configuration: When you create an AMI from an existing instance, it captures the state of that instance, including its configuration for the specific hardware it was running on. This can sometimes lead to compatibility issues when trying to launch the AMI on different instance types.
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SSH Connection Timeout: The SSH connection timeout you're experiencing with the x1e.xlarge instance could be due to several factors, including security group settings, network ACLs, or instance configuration issues.
To resolve these issues and successfully run your workload on a new instance type, consider the following steps:
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Instead of directly launching a new instance type from your saved AMI, first launch a new instance of the same type as your original instance (m3.2xlarge) using your saved AMI.
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Once this instance is running, connect to it and update the system, ensuring all drivers and configurations are current. You may need to install additional drivers or make configuration changes to support newer instance types.
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After updating and configuring the instance, create a new AMI from this updated instance.
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Try launching the new AMI on your desired instance type (x2iezn.2xlarge). If it still doesn't work, you may need to consider manually migrating your data and applications to a fresh instance of the desired type.
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If you continue to experience SSH connection issues, double-check your security group settings, ensure your key pair is correct, and verify that there are no network ACLs blocking the connection.
Remember that not all instance types are compatible with all AMIs, especially when moving between different generations of instance types. In some cases, you may need to perform a more manual migration of your data and applications to a new instance launched from a compatible, up-to-date AMI that supports your desired instance type.
Sources
Migrate to a new instance type by launching a new EC2 instance - Amazon Elastic Compute Cloud
Amazon EC2 AMI lifecycle - Amazon Elastic Compute Cloud
Troubleshoot Amazon EC2 instance stop issues - Amazon Elastic Compute Cloud
Thanks for the answer I already tried point 1 you mentioned: "1- Instead of directly launching a new instance type from your saved AMI, first launch a new instance of the same type as your original instance (m3.2xlarge) using your saved AMI." But I cannot connect successfully to the newly launched instance with the same type. The error is a timeout connection, and I checked the security group and network ACLs, but the problem is still the same: 1- If I launch the same instance type (m3.2xlarge), the error is a timeout on port 22. 2-If I try to launch x2iezn.2xlarge, the error is: "Instance launch failed: The instance configuration for this AWS Marketplace product is not supported. Please see the AWS Marketplace site for more information about supported instance types, regions, and operating systems."
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Thank you for your answer. I am afraid that if I do that, my work will be corrupted—"changing the instance type may affect the Ubuntu environment and could not be restored."