https 적용후 nginx 502 bad gateway 오류

Question

안녕하세요, 제로초님. 배포 후 nginx가 502 bad gateway 오류가 발생했는데, 어제는 잘 되다가 오늘 갑자기 안되서 질문드립니다... 서버를 AWS lightsail을 이용하였고, nginx/letsencrypt를 사용하여 https를 적용하였습니다. nginx 부분은 블로그에 작성하신 내용을 참고하였고, default와 .conf 파일 은 다음과 같습니다. / / etc / nginx / nginx . conf user www - data ; worker_processes auto ; pid / run / nginx . pid ; include / etc / nginx / modules - enabled /*.conf; events { worker_connections 768; # multi_accept on; } http { sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; include /etc/nginx/mime.types; default_type application/octet-stream; ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3; # Dropping SSLv3, ref: POODLE ssl_prefer_server_ciphers on; access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; gzip on; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; } /etc/nginx/sites-enabled/default server { listen 443 ssl ; server_name apis . hometownalba . com ; ssl_certificate / etc / letsencrypt / live / apis . hometownalba . com / fullchain . pem ; # managed b y Certbot ssl_certificate_key / etc / letsencrypt / live / apis . hometownalba . com / privkey . pem ; # managed by Certbot include / etc / letsencrypt / options - ssl - nginx . conf ; ssl_dhparam / etc / letsencrypt / ssl - dhparams . pem ; location / { proxy_set_header Host $host ; proxy_set_header X - Forwarded - For $proxy_add_x_forwarded_for ; proxy_set_header X - Forwarded - Proto $scheme ; user www - data ; user www - data ; } server { listen 443 ssl ; server_name apis . hometownalba . com ; ssl_certificate / etc / letsencrypt / live / apis . hometownalba . com / fullchain . pem ; # managed by Certbot ssl_certificate_key / etc / letsencrypt / live / apis . hometownalba . com / privkey . pem ; # managed by Certbot include / etc / letsencrypt / options - ssl - nginx . conf ; ssl_dhparam / etc / letsencrypt / ssl - dhparams . pem ; location / { proxy_set_header Host $host ; proxy_set_header X - Forwarded - For $proxy_add_x_forwarded_for ; proxy_set_header X - Forwarded - Proto $scheme ; proxy_set_header Upgrade $http_upgrade ; proxy_set_header Connection " upgrade " ; proxy_set_header X - Real - IP $remote_addr ; proxy_pass http : //127.0.0.1:3065; proxy_redirect off ; proxy_connect_timeout 300 ; proxy_send_timeout 300 ; proxy_read_timeout 300 ; } } 그리고 error log를 찍어보았는데, 다음과 같았습니다. 2021 / 11 / 10 05 : 36 : 35 [error] 1603 # 1603 : * 5 upstream prematurely closed connection while reading response header from upstream , client : 1.238 . 158.106 , server : apis . hometownalba . com , request : " GET / HTTP/1.1 " , upstream : " http://127.0.0.1:3065/ " , host : " apis.hometownalba.com " 2021 / 11 / 10 05 : 39 : 37 [error] 1684 # 1684 : * 5 upstream prematurely closed connection while reading response header from upstream , client : 1.238 . 158.106 , server : apis . hometownalba . com , request : " GET / HTTP/1.1 " , upstream : " http://127.0.0.1:3065/ " , host : " apis.hometownalba.com " 매번 답변 감사드립니다 ㅠㅠ

제로초(조현영) · Answer

노드 서버가 꺼진 것 같은데요. 노드 서버쪽 에러를 확인해보세요. pm2 logs --err --lines 200