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2b1a611bab
For now the backends for the different formats do not yet use the extracted ucode cpio archive, but '// TODO' are placed for the backends which should eventually handle it. Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
379 lines
10 KiB
Go
379 lines
10 KiB
Go
package moby
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import (
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"archive/tar"
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"bytes"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"runtime"
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"github.com/moby/tool/src/initrd"
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log "github.com/sirupsen/logrus"
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)
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const (
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isoBios = "linuxkit/mkimage-iso-bios:165b051322578cb0c2a4f16253b20f7d2797a502"
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isoEfi = "linuxkit/mkimage-iso-efi:43592c9b316b036338c4db9f90aada37b48415dc"
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rawBios = "linuxkit/mkimage-raw-bios:eac4dcb78f837618e7e009060146977c2adabe19"
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rawEfi = "linuxkit/mkimage-raw-efi:167441e223c1c131dac349deb67966d400066e04"
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gcp = "linuxkit/mkimage-gcp:d1883809d212ce048f60beb0308a4d2b14c256af"
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vhd = "linuxkit/mkimage-vhd:2a31f2bc91c1d247160570bd17868075e6c0009a"
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vmdk = "linuxkit/mkimage-vmdk:df02a4fabd87a82209fbbacebde58c4440d2daf0"
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dynamicvhd = "linuxkit/mkimage-dynamic-vhd:8553167d10c3e8d8603b2566d01bdc0cf5908fa5"
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rpi3 = "linuxkit/mkimage-rpi3:0735656fff247ca978135e3aeb62864adc612180"
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)
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var outFuns = map[string]func(string, io.Reader, int) error{
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"kernel+initrd": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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// TODO: Handle ucode
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err = outputKernelInitrd(base, kernel, initrd, cmdline)
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if err != nil {
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return fmt.Errorf("Error writing kernel+initrd output: %v", err)
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}
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return nil
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},
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"tar-kernel-initrd": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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// TODO: Handle ucode
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if err := outputKernelInitrdTarball(base, kernel, initrd, cmdline); err != nil {
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return fmt.Errorf("Error writing kernel+initrd tarball output: %v", err)
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}
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return nil
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},
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"iso-bios": func(base string, image io.Reader, size int) error {
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err := outputIso(isoBios, base+".iso", image)
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if err != nil {
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return fmt.Errorf("Error writing iso-bios output: %v", err)
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}
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return nil
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},
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"iso-efi": func(base string, image io.Reader, size int) error {
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err := outputIso(isoEfi, base+"-efi.iso", image)
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if err != nil {
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return fmt.Errorf("Error writing iso-efi output: %v", err)
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}
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return nil
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},
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"raw-bios": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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// TODO: Handle ucode
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err = outputImg(rawBios, base+"-bios.img", kernel, initrd, cmdline)
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if err != nil {
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return fmt.Errorf("Error writing raw-bios output: %v", err)
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}
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return nil
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},
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"raw-efi": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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err = outputImg(rawEfi, base+"-efi.img", kernel, initrd, cmdline)
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if err != nil {
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return fmt.Errorf("Error writing raw-efi output: %v", err)
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}
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return nil
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},
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"aws": func(base string, image io.Reader, size int) error {
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filename := base + ".raw"
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log.Infof(" %s", filename)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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err = outputLinuxKit("raw", filename, kernel, initrd, cmdline, size)
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if err != nil {
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return fmt.Errorf("Error writing raw output: %v", err)
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}
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return nil
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},
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"gcp": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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err = outputImg(gcp, base+".img.tar.gz", kernel, initrd, cmdline)
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if err != nil {
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return fmt.Errorf("Error writing gcp output: %v", err)
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}
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return nil
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},
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"qcow2-bios": func(base string, image io.Reader, size int) error {
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filename := base + ".qcow2"
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log.Infof(" %s", filename)
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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// TODO: Handle ucode
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err = outputLinuxKit("qcow2", filename, kernel, initrd, cmdline, size)
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if err != nil {
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return fmt.Errorf("Error writing qcow2 output: %v", err)
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}
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return nil
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},
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"vhd": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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err = outputImg(vhd, base+".vhd", kernel, initrd, cmdline)
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if err != nil {
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return fmt.Errorf("Error writing vhd output: %v", err)
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}
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return nil
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},
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"dynamic-vhd": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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err = outputImg(dynamicvhd, base+".vhd", kernel, initrd, cmdline)
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if err != nil {
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return fmt.Errorf("Error writing vhd output: %v", err)
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}
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return nil
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},
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"vmdk": func(base string, image io.Reader, size int) error {
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kernel, initrd, cmdline, _, err := tarToInitrd(image)
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if err != nil {
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return fmt.Errorf("Error converting to initrd: %v", err)
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}
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err = outputImg(vmdk, base+".vmdk", kernel, initrd, cmdline)
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if err != nil {
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return fmt.Errorf("Error writing vmdk output: %v", err)
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}
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return nil
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},
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"rpi3": func(base string, image io.Reader, size int) error {
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if runtime.GOARCH != "arm64" {
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return fmt.Errorf("Raspberry Pi output currently only supported on arm64")
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}
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err := outputRPi3(rpi3, base+".tar", image)
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if err != nil {
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return fmt.Errorf("Error writing rpi3 output: %v", err)
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}
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return nil
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},
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}
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var prereq = map[string]string{
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"aws": "mkimage",
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"qcow2-bios": "mkimage",
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}
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func ensurePrereq(out string) error {
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var err error
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p := prereq[out]
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if p != "" {
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err = ensureLinuxkitImage(p)
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}
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return err
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}
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// ValidateFormats checks if the format type is known
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func ValidateFormats(formats []string) error {
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log.Debugf("validating output: %v", formats)
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for _, o := range formats {
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f := outFuns[o]
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if f == nil {
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return fmt.Errorf("Unknown format type %s", o)
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}
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err := ensurePrereq(o)
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if err != nil {
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return fmt.Errorf("Failed to set up format type %s: %v", o, err)
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}
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}
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return nil
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}
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// Formats generates all the specified output formats
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func Formats(base string, image string, formats []string, size int) error {
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log.Debugf("format: %v %s", formats, base)
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err := ValidateFormats(formats)
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if err != nil {
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return err
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}
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for _, o := range formats {
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ir, err := os.Open(image)
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if err != nil {
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return err
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}
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defer ir.Close()
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f := outFuns[o]
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if err := f(base, ir, size); err != nil {
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return err
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}
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}
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return nil
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}
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func tarToInitrd(r io.Reader) ([]byte, []byte, string, []byte, error) {
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w := new(bytes.Buffer)
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iw := initrd.NewWriter(w)
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tr := tar.NewReader(r)
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kernel, cmdline, ucode, err := initrd.CopySplitTar(iw, tr)
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if err != nil {
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return []byte{}, []byte{}, "", []byte{}, err
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}
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iw.Close()
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return kernel, w.Bytes(), cmdline, ucode, nil
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}
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func tarInitrdKernel(kernel, initrd []byte, cmdline string) (*bytes.Buffer, error) {
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buf := new(bytes.Buffer)
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tw := tar.NewWriter(buf)
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hdr := &tar.Header{
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Name: "kernel",
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Mode: 0600,
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Size: int64(len(kernel)),
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}
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err := tw.WriteHeader(hdr)
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if err != nil {
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return buf, err
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}
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_, err = tw.Write(kernel)
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if err != nil {
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return buf, err
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}
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hdr = &tar.Header{
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Name: "initrd.img",
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Mode: 0600,
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Size: int64(len(initrd)),
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}
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err = tw.WriteHeader(hdr)
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if err != nil {
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return buf, err
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}
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_, err = tw.Write(initrd)
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if err != nil {
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return buf, err
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}
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hdr = &tar.Header{
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Name: "cmdline",
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Mode: 0600,
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Size: int64(len(cmdline)),
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}
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err = tw.WriteHeader(hdr)
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if err != nil {
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return buf, err
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}
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_, err = tw.Write([]byte(cmdline))
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if err != nil {
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return buf, err
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}
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return buf, tw.Close()
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}
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func outputImg(image, filename string, kernel []byte, initrd []byte, cmdline string) error {
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log.Debugf("output img: %s %s", image, filename)
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log.Infof(" %s", filename)
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buf, err := tarInitrdKernel(kernel, initrd, cmdline)
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if err != nil {
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return err
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}
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output, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer output.Close()
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return dockerRun(buf, output, true, image, cmdline)
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}
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func outputIso(image, filename string, filesystem io.Reader) error {
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log.Debugf("output ISO: %s %s", image, filename)
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log.Infof(" %s", filename)
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output, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer output.Close()
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return dockerRun(filesystem, output, true, image)
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}
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func outputRPi3(image, filename string, filesystem io.Reader) error {
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log.Debugf("output RPi3: %s %s", image, filename)
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log.Infof(" %s", filename)
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output, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer output.Close()
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return dockerRun(filesystem, output, true, image)
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}
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func outputKernelInitrd(base string, kernel []byte, initrd []byte, cmdline string) error {
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log.Debugf("output kernel/initrd: %s %s", base, cmdline)
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log.Infof(" %s %s %s", base+"-kernel", base+"-initrd.img", base+"-cmdline")
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err := ioutil.WriteFile(base+"-initrd.img", initrd, os.FileMode(0644))
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if err != nil {
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return err
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}
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err = ioutil.WriteFile(base+"-kernel", kernel, os.FileMode(0644))
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if err != nil {
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return err
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}
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return ioutil.WriteFile(base+"-cmdline", []byte(cmdline), os.FileMode(0644))
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}
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func outputKernelInitrdTarball(base string, kernel []byte, initrd []byte, cmdline string) error {
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log.Debugf("output kernel/initrd tarball: %s %s", base, cmdline)
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log.Infof(" %s", base+"-initrd.tar")
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f, err := os.Create(base + "-initrd.tar")
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if err != nil {
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return err
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}
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defer f.Close()
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tw := tar.NewWriter(f)
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hdr := &tar.Header{
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Name: "kernel",
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Mode: 0644,
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Size: int64(len(kernel)),
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}
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if err := tw.WriteHeader(hdr); err != nil {
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return err
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}
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if _, err := tw.Write(kernel); err != nil {
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return err
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}
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hdr = &tar.Header{
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Name: "initrd.img",
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Mode: 0644,
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Size: int64(len(initrd)),
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}
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if err := tw.WriteHeader(hdr); err != nil {
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return err
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}
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if _, err := tw.Write(initrd); err != nil {
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return err
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}
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hdr = &tar.Header{
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Name: "cmdline",
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Mode: 0644,
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Size: int64(len(cmdline)),
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}
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if err := tw.WriteHeader(hdr); err != nil {
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return err
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}
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if _, err := tw.Write([]byte(cmdline)); err != nil {
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return err
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}
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return tw.Close()
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}
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