Rails-使用雾连接到KVM

Question

We are currently trying to connect with our rails app to a remote KVM server with gem 'fog' + 'ruby-libvirt'

Following this good documentation : libvirt-fog-provider

require 'fog'
require 'net/ssh'
require 'net/scp'
require 'pp'

client = Fog::Compute.new({
                     :provider => "libvirt" ,
                     :libvirt_uri => "qemu+ssh://root@perceval.boap.net/system?socket=/var/run/libvirt/libvirt-sock"
                   })

s1 = client.servers.all(:name => "demo2")

This code is working properly with a standard ruby file, we made the connection to KVM server But when we put this same code in rails controller like this :

require 'fog'
require 'net/ssh'
require 'net/scp'

class VirtualMachinesController < ApplicationController

  before_action :connect_kvm
  def index
    head :no_content
  end

  private
  def connect_kvm
    client = Fog::Compute.new({
                                  :provider => "libvirt" ,
                                  :libvirt_uri => "qemu+ssh://root@perceval.boap.net/system?socket=/var/run/libvirt/libvirt-sock"
                              })
  end
end

Rails app display this error :

Call to virConnectOpen failed: internal error: received hangup / error event on socket):
  app/controllers/virtual_machines_controller.rb:28:in `connect_kvm'

Is rails appropriate to hold ssh sessions ? Am i missing something from rails purpose

Answer 1

We found out why it wasn't working properly.

Don't forget to add in your Gemfile:

gem 'net-ssh'