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I understand your concerns regarding the AWS instance issues you've experienced. Let me address each of your points:
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Root cause for shutdown of existing instance: Without more specific details about your instance and the exact circumstances, it's difficult to pinpoint the exact root cause. However, instances can sometimes get stuck in a "shutting-down" or "stopping" state due to issues with the underlying host computer or problems with instance communication. This can happen occasionally and is not always preventable.
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Permanent fix to avoid future shutdown: While there's no guaranteed permanent fix to prevent all instance shutdowns, you can take some steps to improve reliability:
- Ensure your instances are configured with the correct shutdown behavior (set to "Stop" rather than "Terminate").
- Regularly check and maintain your instances, including applying updates and patches.
- Use Amazon CloudWatch to monitor your instances and set up alarms for early detection of issues.
- Consider using Auto Scaling groups to automatically replace unhealthy instances.
- Upgrading plan for better performance and less downtime: AWS doesn't have traditional "plans" to upgrade to, but you can consider the following to improve performance and reduce downtime:
- Use larger instance types if you need more computing power.
- Implement a multi-Availability Zone architecture for high availability.
- Use Elastic Load Balancing to distribute traffic across multiple instances.
- Consider using Amazon EC2 Auto Scaling to automatically adjust capacity based on demand.
- For mission-critical applications, you might want to look into using AWS Dedicated Hosts or Dedicated Instances for additional control and isolation.
To determine the most cost-effective solution, you'll need to analyze your specific workload requirements and budget constraints. AWS provides various pricing options like Reserved Instances or Savings Plans that can offer significant discounts for longer-term commitments.
If you continue to experience frequent issues, it's advisable to open a support ticket with AWS for more personalized assistance tailored to your specific setup and requirements.
Sources
Troubleshoot Amazon EC2 instance stop issues - Amazon Elastic Compute Cloud
AWS Instance stuck in shutting-down | AWS re:Post
Instance shutdown behavior - Instance Scheduler on AWS
Stop and start Amazon EC2 instances - Amazon Elastic Compute Cloud
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