node.js - NGINX reverse proxy to docker container running web app -
on host have docker container on port 4012, , in docker container webapp runs on port 3000 ( 0.0.0.0:4012->3000/tcp ) access webapp go http://hostname:4012 , webpage shows fine. want able go http://hostname/metrics run same webpage browser.
while got work adding location nginx.conf on host:
location /metrics {
proxy_pass http://localhost:4012;
}
all loads index.html (i see same html source code @ http://localhost:4012 , http://hostname/metrics) http://hostname/metrics not load javascript assets needed run webapp. developer tools see non proxied site loads assets so: http://hostname:4012/assets/styles.css while proxied version goes /metrics tries load this: http://hostname/assets/styles.css
it doesn't append /metrics assets index.html... missing here? if means anything, webapp running on nodejs express server listening port 3000 on docker container.
you need make app work way
location /metrics/ { proxy_pass http://localhost:4012/; sub_filter_once off; sub_filter 'http://localhost:4012/' '$scheme://$host/metrics/'; sub_filter '<head>' '<head>\n<base href="hostname:4012">'; } so adding <base> tag html helps change /css /metrics/css. absolute urls changed using sub_filter.
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