Nginx 80 port in docker is occupied

  docker, question

[root@8f52078ea4e6 config]# nginx
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] still could not bind()

Port correspondence of docker container configuration: 22/tcp, 0.0.0.0:80->80/tcp

Not sure, but it should not matter with docker’s port mapping. docker’s relationship mapping is equivalent to configuring a port matching rule in virtual box, which will not occupy this port, and is equivalent to forwarding the external port to the internal container port.
So your mistake should be that the docker internal port is occupied. Try lsof -i :80