As the title says I have a docker image which runs fine on my development machine in docker using network bridged to an another port (
-p 8080:5000). But as soon as I am deploying this on my server connections fail.
-> Ruling out not hosting the application on 0.0.0.0:5000 IP's.
--network host the images do run fine.
I would like to use the Plesk docker extension. The only supported behaviour in here is using the docker bridge network.
This server is running
- Plesk => docker extension
- CentOS 7
I did have some issues with the firewall settings (There are 2 active firewalls: firewalld and the Plesk Firewall). But the issue persists when both are disabled.
-> Ruling out firewall zone trust issues.
The last answer which came up while searching is a collision in network interface IP ranges..? But I have a simple setup with a single interface eth0 (public IP), local loopback and docker0.
What could be wrong here? Any ideas how to troubleshoot this further? I am out after many hours spent researching this issue.
> docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 8c3d3f32b8ef savahdevelopment/savah_api "dotnet savah_api.dll" 11 minutes ago Up 11 minutes 0.0.0.0:8888->5000/tcp sharp_lamarr b355e8fef0ec savahdevelopment/savah_api "dotnet savah_api.dll" 7 hours ago Up 14 minutes savah_api_prod e38e1b01b039 savahdevelopment/savah_api "dotnet savah_api.dll" 7 hours ago Up 14 minutes savah_api_dev > curl http://something.hostbeter.nl:5000/admin/test YUUUUUUUUUUUUUUP!! > curl http://something.hostbeter.nl:5100/admin/test YUUUUUUUUUUUUUUP!! > curl http://something.hostbeter.nl:8888/admin/test curl: (56) Recv failure: Connection reset by peer
Some extra info:
netstat -tulp tells me the working containers did bind to the IPv6 addresses only. But connecting externally with the IPv4 works fine? So it seems to be something network related?