packer-cn/examples/hcl/linux/etc/scripts/030-networking.sh

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#!/bin/sh -eux
ubuntu_version="`lsb_release -r | awk '{print $2}'`";
major_version="`echo $ubuntu_version | awk -F. '{print $1}'`";
if [ "$major_version" -ge "18" ]; then
echo "Create netplan config for eth0"
cat <<EOF >/etc/netplan/01-netcfg.yaml;
network:
version: 2
ethernets:
eth0:
dhcp4: true
EOF
else
# Adding a 2 sec delay to the interface up, to make the dhclient happy
echo "pre-up sleep 2" >> /etc/network/interfaces;
fi
if [ "$major_version" -ge "16" ]; then
# Disable Predictable Network Interface names and use eth0
sed -i 's/en[[:alnum:]]*/eth0/g' /etc/network/interfaces;
sed -i 's/GRUB_CMDLINE_LINUX="\(.*\)"/GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0 \1"/g' /etc/default/grub;
update-grub;
fi