vagrant libvirt

[root@localhost ~]# vagrant up
Bringing machine 'default' up with 'libvirt' provider...
==> default: Checking if box 'generic/centos7' is up to date...
==> default: Creating image (snapshot of base box volume).
==> default: Creating domain with the following settings...
==> default:  -- Name:              root_default
==> default:  -- Domain type:       kvm
==> default:  -- Cpus:              2
==> default:  -- Feature:           acpi
==> default:  -- Feature:           apic
==> default:  -- Feature:           pae
==> default:  -- Memory:            2048M
==> default:  -- Management MAC:   
==> default:  -- Loader:           
==> default:  -- Nvram:           
==> default:  -- Base box:          generic/centos7
==> default:  -- Storage pool:      default
==> default:  -- Image:             /var/lib/libvirt/images/root_default.img (32G)
==> default:  -- Volume Cache:      default
==> default:  -- Kernel:           
==> default:  -- Initrd:           
==> default:  -- Graphics Type:     vnc
==> default:  -- Graphics Port:     -1
==> default:  -- Graphics IP:       127.0.0.1
==> default:  -- Graphics Password: Not defined
==> default:  -- Video Type:        cirrus
==> default:  -- Video VRAM:        256
==> default:  -- Sound Type:
==> default:  -- Keymap:            en-us
==> default:  -- TPM Path:         
==> default:  -- INPUT:             type=mouse, bus=ps2
==> default: Creating shared folders metadata...
==> default: Starting domain.
==> default: Waiting for domain to get an IP address...
==> default: Waiting for SSH to become available...
    default:
    default: Vagrant insecure key detected. Vagrant will automatically replace
    default: this with a newly generated keypair for better security.
    default:
    default: Inserting generated public key within guest...
    default: Removing insecure key from the guest if it's present...
    default: Key inserted! Disconnecting and reconnecting using new SSH key...
==> default: Configuring and enabling network interfaces...
    default: SSH address: 192.168.121.55:22
    default: SSH username: vagrant
    default: SSH auth method: private key