Docker nginx reverse proxy gives "502 Bad Gateway"
Solution 1
I fixed it! I set the server name in different server blocks in nginx config. Remember to use docker port, not host port.
server {
listen 80;
server_name game2048;
location / {
proxy_pass "http://game2048:8080";
}
}
server {
listen 80;
server_name game;
location / {
# Remember to refer to docker port, not host port
# which is 9999 in this case:
proxy_pass "http://game:8080";
}
}
The github repo has been updated to reflect the fix, the old readme file is there under ./README.old01.md
.
Typical that I find the answer when I carefully phrase the question to others. Do you know that feeling?
Solution 2
I had the same "502 Bad Gateway" error, but the solution was to tune proxy_buffer_size following this post instructions:
proxy_buffering off;
proxy_buffer_size 16k;
proxy_busy_buffers_size 24k;
proxy_buffers 64 4k;
Solution 3
I had the same error, but for a web application that was just not serving at the IP and port mentioned in the config.
So say you have this:
location /game {
proxy_pass "http://game:9999";
}
Then make sure the web application that you expect at http://game:9999 is really serving from within a docker container named 'game' and the code is set to serve the app at port 9999.
Solution 4
For me helped this line of code proxy_set_header Host $http_host;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
proxy_redirect off;
proxy_pass http://myserver;
}
jollege
awesomemap.tools - expert on maps, GIS and geospatial software - consulting and development | blockchain enthusiast
Updated on July 09, 2022Comments
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jollege almost 2 years
I'm trying to have a docker container with nginx work as reverse proxy to other docker containers and I keep getting "Bad Gateway" on locations other other than the base location '/'.
I have the following server block:
server { listen 80; location / { proxy_pass "http://game2048:8080"; } location /game { proxy_pass "http://game:9999"; } }
It works for
http://localhost
but not forhttp://localhost/game
which gives "Bad Gateway" in the browser and this on the nginx container:[error] 7#7: *6 connect() failed (111: Connection refused) while connecting to upstream, client: 172.17.0.1, server: , request: "GET /game HTTP/1.1", upstream: "http://172.17.0.4:9999/game", host: "localhost"
I use the official nginx docker image and put my own configuration on it. You can test it and see all details here: https://github.com/jollege/ngprox1
Any ideas what goes wrong?
NB: I have set local hostname entries on docker host to match those names:
127.0.1.1 game2048 127.0.1.1 game
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samprog over 6 yearsStackoverflow is great for rubber duck debugging :)
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jollege over 6 yearsIndeed! I hadn't heard that term before - but man, do I know the concept!
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Alex K over 6 years"Remember to use docker port, not host port." Saved me. Thanks.
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Roel over 3 yearsHow to do this with a docker image?
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funder7 over 3 yearslol guys...that valid for me too, I know what's rubber duck debugging :-D
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Genotypek over 2 yearsThat was exactly what fixed all my problems with reverse proxy nginx! Thanks a lot!
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Jamviet.com about 2 yearsYou save my day! Thanks so much!