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core: 不使用 cloud-init 初始化系统
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bin456789
239
fix-eth-name.sh
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239
fix-eth-name.sh
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#!/usr/bin/env bash
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# shellcheck shell=dash
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# shellcheck disable=SC3001,SC3010
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# alpine 使用 busybox ash
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set -eE
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# 本脚本在首次进入新系统后运行
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# 将 trans 阶段生成的网络配置中的网卡名(eth0) 改为正确的网卡名，也适用于以下情况
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# 1. alpine 要运行此脚本，因为安装后的内核可能有 netboot 没有的驱动
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# 2. dmit debian 普通内核(安装时)和云内核网卡名不一致
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# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=928923
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# todo: 删除 cloud-init
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to_lower() {
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tr '[:upper:]' '[:lower:]'
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}
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retry() {
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local max_try=$1
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local interval=$2
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shift 2
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for i in $(seq "$max_try"); do
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if "$@"; then
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return
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else
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ret=$?
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if [ "$i" -ge "$max_try" ]; then
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return $ret
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fi
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sleep "$interval"
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fi
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done
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}
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# openeuler 本脚本运行一秒后才有 enp3s0
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# 用 systemd-analyze plot >a.svg 发现 sys-subsystem-net-devices-enp3s0.device 也是出现在 NetworkManager 之后
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# 因此需要等待网卡出现
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get_ethx_by_mac() {
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mac=$(echo "$1" | to_lower)
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retry 10 0.5 _get_ethx_by_mac "$mac"
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}
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_get_ethx_by_mac() {
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if true; then
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# 过滤 azure vf (带 master ethx)
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ip -o link | grep -i "$mac" | grep -v master | awk '{print $2}' | cut -d: -f1 | grep .
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return
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else
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for i in $(cd /sys/class/net && echo *); do
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if [ "$(cat "/sys/class/net/$i/address")" = "$mac" ]; then
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echo "$i"
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return
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fi
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done
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return 1
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fi
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}
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fix_rh_sysconfig() {
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for file in /etc/sysconfig/network-scripts/ifcfg-eth*; do
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# 没有 ifcfg-eth* 也会执行一次，因此要判断文件是否存在
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[ -f "$file" ] || continue
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mac=$(grep ^HWADDR= "$file" | cut -d= -f2 | grep .) || continue
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ethx=$(get_ethx_by_mac "$mac") || continue
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proper_file=/etc/sysconfig/network-scripts/ifcfg-$ethx
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if [ "$file" != "$proper_file" ]; then
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# 更改文件内容
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sed -i "s/^DEVICE=.*/DEVICE=$ethx/" "$file"
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# 不要直接更改文件名，因为可能覆盖已有文件
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mv "$file" "$proper_file.tmp"
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fi
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done
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# 更改文件名
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for tmp_file in /etc/sysconfig/network-scripts/ifcfg-e*.tmp; do
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if [ -f "$tmp_file" ]; then
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mv "$tmp_file" "${tmp_file%.tmp}"
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fi
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done
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}
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fix_suse_sysconfig() {
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for file in /etc/sysconfig/network/ifcfg-eth*; do
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[ -f "$file" ] || continue
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# 可能两边有引号
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mac=$(grep ^LLADDR= "$file" | cut -d= -f2 | sed "s/'//g" | grep .) || continue
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ethx=$(get_ethx_by_mac "$mac") || continue
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old_ethx=${file##*-}
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if ! [ "$old_ethx" = "$ethx" ]; then
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# 不要直接更改文件名，因为可能覆盖已有文件
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for type in ifcfg ifroute; do
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old_file=/etc/sysconfig/network/$type-$old_ethx
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new_file=/etc/sysconfig/network/$type-$ethx.tmp
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# 防止没有 ifroute-eth* 导致中断脚本
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if [ -f "$old_file" ]; then
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mv "$old_file" "$new_file"
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fi
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done
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fi
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done
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# 上面的循环结束后，再将 tmp 改成正式文件
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for tmp_file in \
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/etc/sysconfig/network/ifcfg-e*.tmp \
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/etc/sysconfig/network/ifroute-e*.tmp; do
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if [ -f "$tmp_file" ]; then
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mv "$tmp_file" "${tmp_file%.tmp}"
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fi
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done
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}
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fix_network_manager() {
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for file in /etc/NetworkManager/system-connections/cloud-init-eth*.nmconnection; do
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[ -f "$file" ] || continue
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mac=$(grep ^mac-address= "$file" | cut -d= -f2 | grep .) || continue
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ethx=$(get_ethx_by_mac "$mac") || continue
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proper_file=/etc/NetworkManager/system-connections/$ethx.nmconnection
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# 更改文件内容
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sed -i "s/^id=.*/id=$ethx/" "$file"
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# 更改文件名
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mv "$file" "$proper_file"
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done
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}
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# auto lo
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# iface lo inet loopback
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# # mac 11:22:33:44:55:66 # 用此行匹配网卡
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# auto eth0
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# iface eth0 inet static
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# address 1.1.1.1/25
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# gateway 1.1.1.1
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# dns-nameservers 1.1.1.1
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# dns-nameservers 8.8.8.8
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# iface eth0 inet6 static
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# address 2602:1:0:80::100/64
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# gateway 2602:1:0:80::1
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# dns-nameserver 2606:4700:4700::1111
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# dns-nameserver 2001:4860:4860::8888
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fix_ifupdown() {
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file=/etc/network/interfaces
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tmp_file=$file.tmp
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rm -f "$tmp_file"
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if [ -f "$file" ]; then
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while IFS= read -r line; do
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del_this_line=false
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if [[ "$line" = "# mac "* ]]; then
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ethx=
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if mac=$(echo "$line" | awk '{print $NF}'); then
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ethx=$(get_ethx_by_mac "$mac") || true
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fi
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del_this_line=true
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elif [[ "$line" = "iface e"* ]] ||
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[[ "$line" = "auto e"* ]] ||
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[[ "$line" = "allow-hotplug e"* ]]; then
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if [ -n "$ethx" ]; then
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line=$(echo "$line" | awk "{\$2=\"$ethx\"; print \$0}")
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fi
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fi
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if ! $del_this_line; then
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echo "$line" >>"$tmp_file"
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fi
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done <"$file"
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mv "$tmp_file" "$file"
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fi
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}
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fix_netplan() {
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file=/etc/netplan/50-cloud-init.yaml
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tmp_file=$file.tmp
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rm -f "$tmp_file"
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if [ -f "$file" ]; then
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while IFS= read -r line; do
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if echo "$line" | grep -Eq '^[[:space:]]+macaddress:'; then
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# 得到正确的网卡名
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mac=$(echo "$line" | awk '{print $NF}' | sed 's/"//g')
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ethx=$(get_ethx_by_mac "$mac") || true
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elif echo "$line" | grep -Eq '^[[:space:]]+eth[0-9]+:'; then
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# 改成正确的网卡名
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if [ -n "$ethx" ]; then
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line=$(echo "$line" | sed -E "s/[^[:space:]]+/$ethx:/")
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fi
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fi
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echo "$line" >>"$tmp_file"
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# 删除 set-name 不过这一步在 trans 已完成
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# 因为 netplan-generator 会在 systemd generator 阶段就根据 netplan 配置重命名网卡
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# systemd generator 阶段比本脚本和 systemd-networkd 更早运行
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# 倒序
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done < <(grep -Ev "^[[:space:]]+set-name:" "$file" | tac)
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# 再倒序回来
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tac "$tmp_file" >"$file"
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rm -f "$tmp_file"
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# 通过 systemd netplan generator 生成 /run/systemd/network/10-netplan-enp3s0.network
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systemctl daemon-reload
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fi
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}
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fix_systemd_networkd() {
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for file in /etc/systemd/network/10-cloud-init-eth*.network; do
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[ -f "$file" ] || continue
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mac=$(grep ^MACAddress= $file | cut -d= -f2 | grep .) || continue
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ethx=$(get_ethx_by_mac "$mac") || continue
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proper_file=/etc/systemd/network/10-$ethx.network
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# 更改文件内容
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sed -Ei "s/^Name=eth[0-9]+/Name=$ethx/" "$file"
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# 更改文件名
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mv "$file" "$proper_file"
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done
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}
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fix_rh_sysconfig
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fix_suse_sysconfig
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fix_network_manager
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fix_ifupdown
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fix_netplan
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fix_systemd_networkd
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