问题
I’m trying to configure debugger for my web application, but I run into trouble with specifying correct ports for it.
Vagrantfile:
config.vm.network :private_network, ip: "192.168.68.8"
config.vm.network :forwarded_port, guest: 80, host: 8080
/etc/hosts (on my host machine)
192.168.68.8 mysite.com
I installed these two gems for debugging
gem 'ruby-debug-ide', group: [:development,:test]
gem 'debase', group: [:development,:test]
I read that in order to use ruby-debug-ide on vagrant, I should run
rdebug-ide --host 0.0.0.0 --port 80 --dispatcher-port 8080 -- bin/rails s
where --port should be guest port from Vagrantfile and host port for `--dispatcher-port``
But it says
Permission denied - bind(2) for "0.0.0.0" port 80
On the other side, if I try to change those ports in Vagrantfile, I lose the opportunity to reach my application from 127.0.0.1:specified_port, but still can do it from mysite.com, which is confusing
回答1:
you already have something listening on port 80 (apache or nginx) so you cant bind on this port. You can do one of the following
- start rails on another port like 3000
in your vagrant start rdebug-ide --host 0.0.0.0 --port 3000 --dispatcher-port 3000 -- bin/rails s
If you use a private network IP in your vagrantfile you dont need to forward port as you'll access your VM server using its own IP
- check what is listening on port 80
run sudo netstat -nltp in your VM, check the process which binds the port 80 and kill it
For example
vagrant@precise32:/etc/init.d$ sudo netstat -nltp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 512/rpcbind
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1827/apache2
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 652/sshd
tcp 0 0 0.0.0.0:58397 0.0.0.0:* LISTEN 539/rpc.statd
tcp6 0 0 :::111 :::* LISTEN 512/rpcbind
tcp6 0 0 :::22 :::* LISTEN 652/sshd
...
so you'll kill the apache2 process (PID 1827)
来源：https://stackoverflow.com/questions/42966946/how-to-configure-ports-on-vagrant-and-ruby-debug-ide