initrd/boot-v2.go

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package main
import (
"os"
"os/exec"
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"syscall"
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"github.com/rs/zerolog/log"
"gopkg.in/yaml.v3"
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config "novit.tech/direktil/pkg/bootstrapconfig"
)
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func bootV2() {
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log.Info().Msg("-- boot v2 --")
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kernelVersion := unameRelease()
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log.Info().Str("version", kernelVersion).Msg("Linux")
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cfg := &config.Config{}
{
f, err := os.Open("/config.yaml")
if err != nil {
fatal("failed to open /config.yaml: ", err)
}
err = yaml.NewDecoder(f).Decode(cfg)
f.Close()
if err != nil {
fatal("failed to parse /config.yaml: ", err)
}
}
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log.Info().Msg("config loaded")
if cfg.AntiPhishingCode != "" {
log.Info().Str("anti-phishing-code", cfg.AntiPhishingCode).Send()
}
auths = cfg.Auths
// mount kernel modules
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if cfg.Modules == "" {
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log.Warn().Msg("NOT mounting modules (\"modules:\" not specified)")
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} else {
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log.Info().Str("from", cfg.Modules).Msg("mounting modules")
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mountSquahfs(cfg.Modules, "/modules")
modulesSourcePath := "/modules/lib/modules/" + kernelVersion
if _, err := os.Stat(modulesSourcePath); err != nil {
fatal("invalid modules dir: ", err)
}
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os.MkdirAll("/lib/modules", 0755)
if err := os.Symlink(modulesSourcePath, "/lib/modules/"+kernelVersion); err != nil {
fatal("failed to symlink modules: ", err)
}
}
// load basic modules
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for _, module := range []string{"unix"} {
log.Info().Str("module", module).Msg("loading module")
run("modprobe", module)
}
// devices init
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log.Info().Msg("starting udevd")
err := exec.Command("udevd").Start()
if err != nil {
fatal("failed to start udevd: ", err)
}
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log.Info().Msg("udevadm triggers")
run("udevadm", "trigger", "-c", "add", "-t", "devices")
run("udevadm", "trigger", "-c", "add", "-t", "subsystems")
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log.Info().Msg("udevadm settle")
run("udevadm", "settle")
// networks
setupNetworks(cfg)
// Wireguard VPN
// TODO startVPN()
// SSH service
startSSH(cfg)
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// dmcrypt blockdevs
setupCrypt(cfg.PreLVMCrypt, map[string]string{})
// LVM
setupLVM(cfg)
// bootstrap the system
bootstrap(cfg)
// finalize
finalizeBoot()
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}
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func finalizeBoot() {
// switch root
log.Info().Msg("switching root")
err := syscall.Exec("/sbin/switch_root", []string{"switch_root",
"-c", "/dev/console", "/system", "/sbin/init"}, os.Environ())
fatal("switch_root failed: ", err)
}