The goal is to:
I've dealt with the task successfully just running nginx on my ubuntu. But when I try the same in docker container I get 502 for each "/api" request:
2019/11/03 14:35:39 [error] 6#6: *22 connect() failed (111: Connection refused) while connecting to upstream, client: 172.17.0.1, server: 127.0.0.1, request: "GET /api/library/source/find?page=0&size=40&q=JTdCJTIycXVlcnklMjIlM0ElMjIlMjIlMkMlMjJwZXJpb2QlMjIlM0ElMjJBTlRJUVVJVFklMjIlMkMlMjJjbGFzc2lmaWNhdGlvbnMlMjIlM0ElNUIlNUQlMkMlMjJ0eXBlcyUyMiUzQSU1QiU1RCU3RA== HTTP/1.1", upstream: "http://127.0.0.1:8080/api/library/source/find?page=0&size=40&q=JTdCJTIycXVlcnklMjIlM0ElMjIlMjIlMkMlMjJwZXJpb2QlMjIlM0ElMjJBTlRJUVVJVFklMjIlMkMlMjJjbGFzc2lmaWNhdGlvbnMlMjIlM0ElNUIlNUQlMkMlMjJ0eXBlcyUyMiUzQSU1QiU1RCU3RA==", host: "localhost", referrer: "http://localhost/library/period/antiquity" 172.17.0.1 - - [03/Nov/2019:14:35:39 +0000] "GET /api/library/source/find?page=0&size=40&q=JTdCJTIycXVlcnklMjIlM0ElMjIlMjIlMkMlMjJwZXJpb2QlMjIlM0ElMjJBTlRJUVVJVFklMjIlMkMlMjJjbGFzc2lmaWNhdGlvbnMlMjIlM0ElNUIlNUQlMkMlMjJ0eXBlcyUyMiUzQSU1QiU1RCU3RA== HTTP/1.1" 502 559 "http://localhost/library/period/antiquity" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36" "-"
'172.17.0.1' looks weird. I use "nginx" image and it has the following in its /etc/hosts file:
127.0.0.1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.2 1a0b306a3a80
note '172.17.0.2', not '172.17.0.1'.
Dockerfile and nginx config I'm running may be found here: https://github.com/ahlinist/tempvs-ui
The image is built and run as: sudo docker build . -t tempvs-ui sudo docker run -p 80:80 tempvs-ui
What am I doing wrong? How to make the docker image send requests to localhost:8080?
Quick answer: run docker with additional parameter network:
docker run -p 80:80 --network=host tempvs-ui
The thing is that localhost in your docker (host) server and docker container are not the same.
With your current implementation redirect is happened inside the docker container. Whereas your target application runs in host machine. That's why there is Connection refused error.
Documentation: docker network, docker run network param.
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