mirror of https://github.com/linka-cloud/d2vm.git
94 lines
2.2 KiB
Go
94 lines
2.2 KiB
Go
// Copyright 2023 Linka Cloud All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package d2vm
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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"github.com/sirupsen/logrus"
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"go.linka.cloud/d2vm/pkg/exec"
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)
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const syslinuxCfg = `DEFAULT linux
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SAY Now booting the kernel from SYSLINUX...
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LABEL linux
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KERNEL %s
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APPEND %s
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`
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var mbrPaths = []string{
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// debian path
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"/usr/lib/syslinux/mbr/mbr.bin",
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// ubuntu path
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"/usr/lib/EXTLINUX/mbr.bin",
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// alpine path
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"/usr/share/syslinux/mbr.bin",
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// centos path
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"/usr/share/syslinux/mbr.bin",
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// archlinux path
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"/usr/lib/syslinux/bios/mbr.bin",
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}
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type syslinux struct {
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c Config
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mbrBin string
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}
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func (s syslinux) Setup(ctx context.Context, dev, root string, cmdline string) error {
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logrus.Infof("setting up syslinux bootloader")
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if err := exec.Run(ctx, "extlinux", "--install", filepath.Join(root, "boot")); err != nil {
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return err
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}
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if err := os.WriteFile(filepath.Join(root, "boot", "syslinux.cfg"), []byte(fmt.Sprintf(syslinuxCfg, s.c.Kernel, cmdline)), perm); err != nil {
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return err
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}
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logrus.Infof("writing MBR")
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if err := exec.Run(ctx, "dd", fmt.Sprintf("if=%s", s.mbrBin), fmt.Sprintf("of=%s", dev), "bs=440", "count=1", "conv=notrunc"); err != nil {
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return err
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}
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return nil
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}
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type syslinuxProvider struct{}
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func (s syslinuxProvider) New(c Config, _ OSRelease) (Bootloader, error) {
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mbrBin := ""
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for _, v := range mbrPaths {
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if _, err := os.Stat(v); err == nil {
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mbrBin = v
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break
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}
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}
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if mbrBin == "" {
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return nil, fmt.Errorf("unable to find syslinux's mbr.bin path")
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}
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return &syslinux{
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c: c,
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mbrBin: mbrBin,
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}, nil
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}
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func (s syslinuxProvider) Name() string {
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return "syslinux"
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}
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func init() {
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RegisterBootloaderProvider(syslinuxProvider{})
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}
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