virbr0 – Rodrigo Silva e Silva

Listando interface virbr0

[root@bd01 ~]# ifconfig virbr0
virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:f0:c0:a2  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@bd01 ~]# ifconfig virbr0

virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500

inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255

ether 52:54:00:f0:c0:a2 txqueuelen 0 (Ethernet)

RX packets 0 bytes 0 (0.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 0 bytes 0 (0.0 B)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Listar rede padrão

[root@bd01 ~]# virsh net-list
bash: virsh: command not found...

1 2	[root@bd01 ~]# virsh net-list bash: virsh: command not found...

Instalar o pacote virsh

[root@bd01 ~]# yum install libvirt

Dependencies Resolved

==========================================================================================================================
 Package                                    Arch               Version                       Repository              Size
==========================================================================================================================
Installing:
 libvirt                                    x86_64             3.9.0-14.el7_5.2              ol7_latest             172 k
Installing for dependencies:
 autogen-libopts                            x86_64             5.18-5.el7                    ol7_latest              65 k
 gnutls-dane                                x86_64             3.3.26-9.0.1.el7              ol7_latest              34 k
 gnutls-utils                               x86_64             3.3.26-9.0.1.el7              ol7_latest             236 k
 libvirt-client                             x86_64             3.9.0-14.el7_5.2              ol7_latest             457 k
 libvirt-daemon-config-nwfilter             x86_64             3.9.0-14.el7_5.2              ol7_latest             178 k
 libvirt-daemon-driver-lxc                  x86_64             3.9.0-14.el7_5.2              ol7_latest             899 k

Transaction Summary
==========================================================================================================================
Install  1 Package (+6 Dependent packages)

Total download size: 2.0 M
Installed size: 3.8 M
Is this ok [y/d/N]: y

[root@bd01 ~]# yum install libvirt

Dependencies Resolved

==========================================================================================================================

Package Arch Version Repository Size

==========================================================================================================================

Installing:

libvirt x86_64 3.9.0-14.el7_5.2 ol7_latest 172 k

Installing for dependencies:

autogen-libopts x86_64 5.18-5.el7 ol7_latest 65 k

gnutls-dane x86_64 3.3.26-9.0.1.el7 ol7_latest 34 k

gnutls-utils x86_64 3.3.26-9.0.1.el7 ol7_latest 236 k

libvirt-client x86_64 3.9.0-14.el7_5.2 ol7_latest 457 k

libvirt-daemon-config-nwfilter x86_64 3.9.0-14.el7_5.2 ol7_latest 178 k

libvirt-daemon-driver-lxc x86_64 3.9.0-14.el7_5.2 ol7_latest 899 k

Transaction Summary

==========================================================================================================================

Install 1 Package (+6 Dependent packages)

Total download size: 2.0 M

Installed size: 3.8 M

Is this ok [y/d/N]: y

Listar rede padrão

[root@bd01 ~]# virsh net-list
 Name                 State      Autostart     Persistent
----------------------------------------------------------
 default              active     yes           yes

[root@bd01 ~]# virsh net-list

Name State Autostart Persistent

----------------------------------------------------------

default active yes yes

Destruir a rede padrão

[root@bd01 ~]# virsh net-destroy default
Network default destroyed

1 2	[root@bd01 ~]# virsh net-destroy default Network default destroyed

Remova permanentemente a rede virtual padrão da configuração.

[root@bd01 ~]# virsh net-undefine default
Network default has been undefined

1 2	[root@bd01 ~]# virsh net-undefine default Network default has been undefined

Listando interface virbr0

[root@bd01 ~]# ifconfig virbr0
virbr0: error fetching interface information: Device not found

1 2	[root@bd01 ~]# ifconfig virbr0 virbr0: error fetching interface information: Device not found

Listando rede virbr0.

[root@bd01 ~]# ifconfig virbr0
virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:f0:c0:a2  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@bd01 ~]# ifconfig virbr0

virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500

inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255

ether 52:54:00:f0:c0:a2 txqueuelen 0 (Ethernet)

RX packets 0 bytes 0 (0.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 0 bytes 0 (0.0 B)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Verificando status do serviço libvirtd.

[root@bd01 ~]# systemctl status libvirtd.service
● libvirtd.service - Virtualization daemon
   Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2018-04-19 10:20:09 -03; 3min 8s ago
     Docs: man:libvirtd(8)
           https://libvirt.org
 Main PID: 1251 (libvirtd)
   CGroup: /system.slice/libvirtd.service
           ├─1251 /usr/sbin/libvirtd
           ├─1487 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr...
           └─1488 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr...

[root@bd01 ~]# systemctl status libvirtd.service

● libvirtd.service - Virtualization daemon

Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled)

Active: active (running) since Thu 2018-04-19 10:20:09 -03; 3min 8s ago

Docs: man:libvirtd(8)

https://libvirt.org

Main PID: 1251 (libvirtd)

CGroup: /system.slice/libvirtd.service

├─1251 /usr/sbin/libvirtd

├─1487 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr...

└─1488 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr...

Parando o serviço libvirtd.

[root@bd01 ~]# /bin/systemctl stop libvirtd.service
[root@bd01 ~]# /bin/systemctl status libvirtd.service
● libvirtd.service - Virtualization daemon
   Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Thu 2018-04-19 10:24:31 -03; 20s ago

[root@bd01 ~]# /bin/systemctl stop libvirtd.service

[root@bd01 ~]# /bin/systemctl status libvirtd.service

● libvirtd.service - Virtualization daemon

Loaded: loaded (/usr/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled)

Active: inactive (dead) since Thu 2018-04-19 10:24:31 -03; 20s ago

Desabilitando a interface virbr0.

[root@bd01 ~]# systemctl disable libvirtd.service
Removed symlink /etc/systemd/system/multi-user.target.wants/libvirtd.service.
Removed symlink /etc/systemd/system/sockets.target.wants/virtlogd.socket.
Removed symlink /etc/systemd/system/sockets.target.wants/virtlockd.socket.

[root@bd01 ~]# systemctl disable libvirtd.service

Removed symlink /etc/systemd/system/multi-user.target.wants/libvirtd.service.

Removed symlink /etc/systemd/system/sockets.target.wants/virtlogd.socket.

Removed symlink /etc/systemd/system/sockets.target.wants/virtlockd.socket.

Reinicie o servidor.

[root@bd01 ~]# reboot

1	[root@bd01 ~]# reboot

Verificando a interface virbr0.

[root@bd01 ~]# ifconfig virbr0
virbr0: error fetching interface information: Device not found

1 2	[root@bd01 ~]# ifconfig virbr0 virbr0: error fetching interface information: Device not found

Tag: virbr0

Destruindo Interface virbr0

Desabilitar interface virbr0