Troubleshooting Node.js App Downtime on EC2 t2.micro After Updates

Question

I have hosted my Node.js application on an EC2 instance (t2.micro). Whenever I release a production update, my server goes down. I have checked the logs and performed troubleshooting on the EC2 instance, but the server still goes down. When I restart or stop and then start the instance, the server comes back up, but it goes down again after a few minutes. How can I resolve this issue?

Riku_Kobayashi · Answer

Hello.

What kind of errors are output in the system log or application log?  
Also, since t2.micro is a small instance type, it is possible that it may stop due to some kind of load during application deployment.  
Please check whether the CPU usage rate or memory usage rate was high during deployment.  
By the way, the t2 series instance type consumes something called burst credits when the CPU usage rate is high.  
Once this is consumed, performance will drop to the baseline throughput.  
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/burstable-credits-baseline-concepts.html

Troubleshooting Node.js App Downtime on EC2 t2.micro After Updates

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