194 lines
6.3 KiB
Go
194 lines
6.3 KiB
Go
//go:generate struct-markdown
|
|
|
|
package commonsteps
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
"strings"
|
|
|
|
getter "github.com/hashicorp/go-getter/v2"
|
|
urlhelper "github.com/hashicorp/go-getter/v2/helper/url"
|
|
"github.com/hashicorp/packer/packer-plugin-sdk/template/interpolate"
|
|
)
|
|
|
|
// By default, Packer will symlink, download or copy image files to the Packer
|
|
// cache into a "`hash($iso_url+$iso_checksum).$iso_target_extension`" file.
|
|
// Packer uses [hashicorp/go-getter](https://github.com/hashicorp/go-getter) in
|
|
// file mode in order to perform a download.
|
|
//
|
|
// go-getter supports the following protocols:
|
|
//
|
|
// * Local files
|
|
// * Git
|
|
// * Mercurial
|
|
// * HTTP
|
|
// * Amazon S3
|
|
//
|
|
// Examples:
|
|
// go-getter can guess the checksum type based on `iso_checksum` length, and it is
|
|
// also possible to specify the checksum type.
|
|
//
|
|
// In JSON:
|
|
//
|
|
// ```json
|
|
// "iso_checksum": "946a6077af6f5f95a51f82fdc44051c7aa19f9cfc5f737954845a6050543d7c2",
|
|
// "iso_url": "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
|
|
// ```
|
|
//
|
|
// ```json
|
|
// "iso_checksum": "file:ubuntu.org/..../ubuntu-14.04.1-server-amd64.iso.sum",
|
|
// "iso_url": "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
|
|
// ```
|
|
//
|
|
// ```json
|
|
// "iso_checksum": "file://./shasums.txt",
|
|
// "iso_url": "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
|
|
// ```
|
|
//
|
|
// ```json
|
|
// "iso_checksum": "file:./shasums.txt",
|
|
// "iso_url": "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
|
|
// ```
|
|
//
|
|
// In HCL2:
|
|
//
|
|
// ```hcl
|
|
// iso_checksum = "946a6077af6f5f95a51f82fdc44051c7aa19f9cfc5f737954845a6050543d7c2"
|
|
// iso_url = "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
|
|
// ```
|
|
//
|
|
// ```hcl
|
|
// iso_checksum = "file:ubuntu.org/..../ubuntu-14.04.1-server-amd64.iso.sum"
|
|
// iso_url = "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
|
|
// ```
|
|
//
|
|
// ```hcl
|
|
// iso_checksum = "file://./shasums.txt"
|
|
// iso_url = "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
|
|
// ```
|
|
//
|
|
// ```hcl
|
|
// iso_checksum = "file:./shasums.txt",
|
|
// iso_url = "ubuntu.org/.../ubuntu-14.04.1-server-amd64.iso"
|
|
// ```
|
|
//
|
|
type ISOConfig struct {
|
|
// The checksum for the ISO file or virtual hard drive file. The type of
|
|
// the checksum is specified within the checksum field as a prefix, ex:
|
|
// "md5:{$checksum}". The type of the checksum can also be omitted and
|
|
// Packer will try to infer it based on string length. Valid values are
|
|
// "none", "{$checksum}", "md5:{$checksum}", "sha1:{$checksum}",
|
|
// "sha256:{$checksum}", "sha512:{$checksum}" or "file:{$path}". Here is a
|
|
// list of valid checksum values:
|
|
// * md5:090992ba9fd140077b0661cb75f7ce13
|
|
// * 090992ba9fd140077b0661cb75f7ce13
|
|
// * sha1:ebfb681885ddf1234c18094a45bbeafd91467911
|
|
// * ebfb681885ddf1234c18094a45bbeafd91467911
|
|
// * sha256:ed363350696a726b7932db864dda019bd2017365c9e299627830f06954643f93
|
|
// * ed363350696a726b7932db864dda019bd2017365c9e299627830f06954643f93
|
|
// * file:http://releases.ubuntu.com/20.04/MD5SUMS
|
|
// * file:file://./local/path/file.sum
|
|
// * file:./local/path/file.sum
|
|
// * none
|
|
// Although the checksum will not be verified when it is set to "none",
|
|
// this is not recommended since these files can be very large and
|
|
// corruption does happen from time to time.
|
|
ISOChecksum string `mapstructure:"iso_checksum" required:"true"`
|
|
// A URL to the ISO containing the installation image or virtual hard drive
|
|
// (VHD or VHDX) file to clone.
|
|
RawSingleISOUrl string `mapstructure:"iso_url" required:"true"`
|
|
// Multiple URLs for the ISO to download. Packer will try these in order.
|
|
// If anything goes wrong attempting to download or while downloading a
|
|
// single URL, it will move on to the next. All URLs must point to the same
|
|
// file (same checksum). By default this is empty and `iso_url` is used.
|
|
// Only one of `iso_url` or `iso_urls` can be specified.
|
|
ISOUrls []string `mapstructure:"iso_urls"`
|
|
// The path where the iso should be saved after download. By default will
|
|
// go in the packer cache, with a hash of the original filename and
|
|
// checksum as its name.
|
|
TargetPath string `mapstructure:"iso_target_path"`
|
|
// The extension of the iso file after download. This defaults to `iso`.
|
|
TargetExtension string `mapstructure:"iso_target_extension"`
|
|
}
|
|
|
|
func (c *ISOConfig) Prepare(*interpolate.Context) (warnings []string, errs []error) {
|
|
if len(c.ISOUrls) != 0 && c.RawSingleISOUrl != "" {
|
|
errs = append(
|
|
errs, errors.New("Only one of iso_url or iso_urls must be specified"))
|
|
return
|
|
}
|
|
|
|
if c.RawSingleISOUrl != "" {
|
|
// make sure only array is set
|
|
c.ISOUrls = append([]string{c.RawSingleISOUrl}, c.ISOUrls...)
|
|
c.RawSingleISOUrl = ""
|
|
}
|
|
|
|
if len(c.ISOUrls) == 0 {
|
|
errs = append(
|
|
errs, errors.New("One of iso_url or iso_urls must be specified"))
|
|
return
|
|
}
|
|
if c.TargetExtension == "" {
|
|
c.TargetExtension = "iso"
|
|
}
|
|
c.TargetExtension = strings.ToLower(c.TargetExtension)
|
|
|
|
// Warnings
|
|
if c.ISOChecksum == "none" {
|
|
warnings = append(warnings,
|
|
"A checksum of 'none' was specified. Since ISO files are so big,\n"+
|
|
"a checksum is highly recommended.")
|
|
return warnings, errs
|
|
} else if c.ISOChecksum == "" {
|
|
errs = append(errs, fmt.Errorf("A checksum must be specified"))
|
|
} else {
|
|
// ESX5Driver.VerifyChecksum is ran remotely but should not download a
|
|
// checksum file, therefore in case it is a file, we need to download
|
|
// it now and compute the checksum now, we transform it back to a
|
|
// checksum string so that it can be simply read in the VerifyChecksum.
|
|
//
|
|
// Doing this also has the added benefit of failing early if a checksum
|
|
// is incorrect or if getting it should fail.
|
|
u, err := urlhelper.Parse(c.ISOUrls[0])
|
|
if err != nil {
|
|
return warnings, append(errs, fmt.Errorf("url parse: %s", err))
|
|
}
|
|
|
|
q := u.Query()
|
|
if c.ISOChecksum != "" {
|
|
q.Set("checksum", c.ISOChecksum)
|
|
}
|
|
u.RawQuery = q.Encode()
|
|
|
|
wd, err := os.Getwd()
|
|
if err != nil {
|
|
log.Printf("Getwd: %v", err)
|
|
// here we ignore the error in case the
|
|
// working directory is not needed.
|
|
}
|
|
|
|
req := &getter.Request{
|
|
Src: u.String(),
|
|
Pwd: wd,
|
|
}
|
|
cksum, err := defaultGetterClient.GetChecksum(context.TODO(), req)
|
|
if err != nil {
|
|
errs = append(errs, fmt.Errorf("%v in %q", err, req.URL().Query().Get("checksum")))
|
|
} else {
|
|
c.ISOChecksum = cksum.String()
|
|
}
|
|
}
|
|
|
|
if strings.HasSuffix(strings.ToLower(c.ISOChecksum), ".iso") {
|
|
errs = append(errs, fmt.Errorf("Error parsing checksum:"+
|
|
" .iso is not a valid checksum ending"))
|
|
}
|
|
|
|
return warnings, errs
|
|
}
|