虚拟机固定ip配置

#!/bin/bash


addr="10.1.1.81"
gateway="10.1.1.2"
dns="10.1.1.2"
HOST_IF="$(ip route|grep default|head -n1|cut -d' ' -f5)"

# 网卡配置
nmcli connection modify "${HOST_IF}" autoconnect yes ipv4.method manual ipv4.gateway 10.1.1.2 ipv4.dns 10.1.1.2 ipv4.addr ${addr}/24
sed -ri "s/^UUID=.*$/UUID=$(uuidgen)/g" /etc/sysconfig/network-scripts/ifcfg-"${HOST_IF}"
nmcli connection reload "${HOST_IF}" && nmcli connection up "${HOST_IF}"

基于ip配置hostname

HOST_IP=$(ip a|grep "$HOST_IF$"|head -n1|awk '{print $2}'|cut -d'/' -f1)
HOST_NAME=k8s-${HOST_IP//./-}
hostnamectl set-hostname $HOST_NAME

grep "$HOST_IP $HOST_NAME" /etc/hosts || echo "$HOST_IP $HOST_NAME" >> /etc/hosts