Introdução
Configuração utilizando: Netplan
Exemplo de Arquivo de configuração de redes utilizando netplan, no Ubuntu Server 18.
network:
version: 2
ethernets:
enp0s3:
optional: false
enp0s9:
optional: false
enp0s10:
optional: false
enp0s8:
optional: false
vlans:
enp0s3.5:
id: '5'
link: 'enp0s3'
optional: false
enp0s3.10:
id: '10'
link: 'enp0s3'
optional: false
enp0s3.20:
id: '20'
link: 'enp0s3'
optional: false
enp0s3.30:
id: '30'
link: 'enp0s3'
optional: false
bridges:
br_giga:
addresses: []
dhcp4: true
interfaces: [enp0s3]
optional: false
parameters:
stp: false
br_internet:
addresses: [177.125.143.8/27]
gateway4: 177.125.143.1
interfaces: [enp0s3.30]
optional: false
nameservers:
addresses: [8.8.8.8,8.8.4.4]
parameters:
stp: false
br_control:
addresses: [10.138.0.30/16]
interfaces: [enp0s3.10]
optional: false
routes:
- to: 10.0.0.0/8
via: 10.138.0.1
on-link: true
parameters:
stp: false
br_cmc:
addresses: [172.16.138.30/24]
interfaces: [enp0s3.5]
optional: false
parameters:
stp: false
br_exp1:
interfaces: [enp0s9]
optional: false
parameters:
stp: false
br_exp2:
interfaces: [enp0s10]
optional: false
parameters:
stp: false
Feita as configurações no arquivo yaml, aplique-as com o seguinte comando:
netplan apply
Configuração utilizando: ifupdown
Ao utilizar o ifupdown é possível reaproveitar as configurações do /etc/network/interfaces. Para que o uso do ifupdown seja feito com sucesso, realize os seguintes procedimentos:
Desabilitar o Netplan.
cd /etc/netplan/ rm /etc/netplan/*.yaml
Instale o pacote do ifupdown.
apt-get install ifupdown
Edite o arquivo interfaces.
vim /etc/network/interfaces
Conteúdo de exemplo:
É importante remapear as interfaces de acordo com as novas notações.
auto lo iface lo inet loopback auto br_giga iface br_giga inet dhcp bridge_ports eth0.20 bridge-stp off bridge-maxwait 2 auto br_internet iface br_internet inet static address 177.125.143.8 netmask 255.255.255.224 dns-nameservers 177.125.142.47 8.8.8.8 8.8.4.4 gateway 177.125.143.1 bridge_ports eth0.30 bridge-stp off bridge-maxwait 2 auto br_control iface br_control inet static bridge_ports eth0.10 bridge-stp off bridge-maxwait 2 address 10.138.0.30 netmask 255.255.0.0 dns-nameservers 10.138.0.80 8.8.8.8 8.8.4.4 post-up ip route add 10.0.0.0/8 via 10.138.0.1 auto br_cmc iface br_cmc inet static bridge_ports eth0.5 bridge-stp off bridge-maxwait 2 address 172.16.138.30 netmask 255.255.255.0 auto br_exp1 iface br_exp1 inet manual bridge_ports eth2 bridge-stp off bridge-maxwait 2 auto br_exp2 iface br_exp2 inet manual bridge_ports eth3 bridge-stp off bridge-maxwait 2 auto br_exp3 iface br_exp3 inet manual bridge_ports eth1 bridge-stp off bridge-maxwait 2
Aplicadas as configurações do ifupdown, recomendamos reiniciar o servidor.
Habilitar Internet para VMs
Para habilitar a Internet para as VMs, recomendamos os seguintes procedimentos.
Método provisório:
echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A POSTROUTING -s 10.XXX.0.0/16 -o br_internet -j MASQUERADE
Aonde XXX é o ID da ilha.