问题
I configured demo-spring-cas-angular to work on port 8081. When I run it on my machine (OSX) it works very well.
I have problem when it is run inside vagrant. Port 8081 is forwarded
config.vm.network "forwarded_port", guest: 8080, host: 8080
config.vm.network "forwarded_port", guest: 8081, host: 8081
config.vm.network "forwarded_port", guest: 8761, host: 8761
config.vm.network "forwarded_port", guest: 5432, host: 5432
config.vm.network "forwarded_port", guest: 3306, host: 3306
config.vm.network "forwarded_port", guest: 8443, host: 8443
I don't have problems with other ports besides 8081 (I have access to databases, eureka registry, CAS instance).
From OSX:
curl http://localhost:8081/index.html#/
curl: (52) Empty reply from server
From vagrant:
curl http://localhost:8081/index.html#/
<!doctype html>
<!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7"> <![endif]-->
<!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8"> <![endif]-->
<!--[if IE 8]> <html class="no-js lt-ie9"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js"> <!--<![endif]-->
...
I don't see any exceptions during application boot.
Access URLs:
----------------------------------------------------------
Local: http://127.0.0.1:8081
External: http://127.0.0.1:8081
----------------------------------------------------------
It is problem with application or with vagrant? I tried to run another application on 8081 - problem didn't occur.
回答1:
you can change the host info from application-dev.yml to be
server:
port: 8081
address: 0.0.0.0
so it will be available outside of the VM
127.0.0.1 is a loopback address so if you assign this IP (or localhost) to the config of your server, its not accessible from other network interfaces, so you cannot access it from outside of the VM. If you bind your server to 0.0.0.0 its available to all interfaces
来源：https://stackoverflow.com/questions/39074373/jhipster-spring-angular-vagrant-empty-replay-from-server