ISOConfig - Packer — ContextQMD

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 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"