Wouldn't it be nice if you could run goss tests against an image during a packer build? Well, I thought it would, so now you can!

This runs during the provisioning process since the machine being provisioned is only available at that time. There is an example packer build with goss tests in the example/ directory.

packer {
  required_version = ">= 1.9.0"

  required_plugins {
    goss = {
      version = "~> 3"
      source  = "github.com/YaleUniversity/goss"
    }
  }
}

build {
  sources = [".."]
      
  provisioner "goss" {
    # Provisioner Args
    arch ="amd64" 
    download_path = "/tmp/goss-VERSION-linux-ARCH"
    inspect = "{{ inspect_mode }}",
    password = ""
    skip_install = false
    url = "https://github.com/aelsabbahy/goss/releases/download/vVERSION/goss-linux-ARCH"
    username = ""
    version = "0.3.2"

    # GOSS Args
    tests = [
      "goss/goss.yaml"
    ]

    remote_folder = "/tmp"
    remote_path  = "/tmp/goss"
    skip_ssl = false
    use_sudo = false
    format = ""
    goss_file = ""
    vars_file  = ""
    target_os = "Linux"

    vars_env = {
      ARCH = "amd64"
      PROVIDER = "{{ cloud-provider }}"
    }

    vars_inline = {
      OS = "centos",
      version = "{{ version }}"
    }

    retry_timeout = "0s"
    sleep = "1s"
  }
}

Goss spec file and debug spec file (goss render -d) are downloaded to /tmp folder on local machine from the remote VM. These files are exact specs GOSS validated on the VM. The downloaded GOSS spec can be used to validate any other VM image for equivalency.

This now has support for Windows. Set the optional parameter target_os to Windows. Currently, the vars_env parameter must include GOSS_USE_ALPHA=1 as specified in goss's feature parity document. In the future when goss come of of alpha for Windows this parameter will not be required.

docker run --rm -it -v "$PWD":/usr/src/packer-provisioner-goss -w /usr/src/packer-provisioner-goss -e 'VERSION=v1.0.0' golang:1.13 bash
go test ./...
for GOOS in darwin linux windows; do
  for GOARCH in 386 amd64; do
    export GOOS GOARCH
      go get -v ./...
      go build -v -o packer-provisioner-goss-${VERSION}-$GOOS-$GOARCH
  done
done

E. Camden Fisher camden.fisher@yale.edu

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