Aws EC2 多网卡配置

1 min read

We can no longer assign a public IP address to your instance

The auto-assign public IP address feature for this instance is disabled because you specified multiple network interfaces. Public IPs can only be assigned to instances with one network interface. To re-enable the auto-assign public IP address feature, please specify only the eth0 network interface.

ip

MAC=`curl http://169.254.169.254/latest/meta-data/mac` 
curl http://169.254.169.254/latest/meta-data/network/interfaces/macs/${MAC}/local-ipv4s

配置第二块网卡

ip a | grep ^[[:digit:]]



tee -a /etc/network/interfaces.d/50-cloud-init.cfg <<-'EOF'
auto eth1
iface eth1 inet dhcp
EOF




tee -a /etc/dhcp/dhclient-enter-hooks.d/restrict-default-gw <<-'EOF'
case ${interface} in
  eth0)
    ;;
  *)
    unset new_routers
    ;;
esac
EOF



systemctl restart networking

访问互联网

必须分配并关联EIP

AWS SDN

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