Facing 503 Error message on AWS Instance after migrating to newer Instance

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I am trying to migrate my AWS Linux 1 env to AWS Linux 2. So in parallel I configured AWS Linux 2 and my project is deployed correctly there. My issue is when I try to switch the DNS entry to point to my new environment. I am swapping url for it, but my requests to the new env I receive: Status: 503 Service Unavailable: Back-end server is at capacity Source: Network

Maybe I am missing any step? Thanks a lot in advance

amazon-web-services linux
1 Answers

You are most likely to misconfigure your health-check, which could returns an error because your (proxy-) server is not working correctly). Check your ELB logs. Try grepping the log files folder using the "ELB-HealthChecker" user agent. e.g. grep ELB-HealthChecker /var/log/httpd/*

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