From 752bd52f61caeb3734a27de02df3184f88b0bea4 Mon Sep 17 00:00:00 2001
From: Dom Del Nano <ddelnano@gmail.com>
Date: Sun, 26 Feb 2023 21:09:29 -0800
Subject: [PATCH] Revert "Update the ubuntu example to be resilient to ISO
 releases"

---
 examples/README.md                  |  7 +++----
 examples/ubuntu/ubuntu-2004.pkr.hcl | 25 +++----------------------
 2 files changed, 6 insertions(+), 26 deletions(-)

diff --git a/examples/README.md b/examples/README.md
index c19d589..ede7545 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -7,8 +7,7 @@ In order to see an exhaustive list of configuration options for the packer build
 ### Running the examples
 
 In order to run the examples you will need to perform the following steps:
-1. Install packer 1.8 or later (the Ubuntu example requires the `http` data source)
-2. Export those vars:
+1. Export those vars:
 ```
 PKR_VAR_remote_host
 PKR_VAR_remote_password
@@ -18,9 +17,9 @@ PKR_VAR_sr_iso_name
 ``` 
 `PKR_VAR_remote_host` must be the resource pool primary, aka the master.
 
-3. Run `packer init path/to/defenition.pkr.hcl` to download the xenserver plugin
+2. Run `packer init path/to/defenition.pkr.hcl` to download the xenserver plugin
 
-4. Run `packer build  path/to/defenition.pkr.hcl`   
+2. Run `packer build  path/to/defenition.pkr.hcl`   
 so for example:
 `packer build  examples/centos/centos8-netinstall.pkr.hcl`
 
diff --git a/examples/ubuntu/ubuntu-2004.pkr.hcl b/examples/ubuntu/ubuntu-2004.pkr.hcl
index d4b03ff..67238ff 100644
--- a/examples/ubuntu/ubuntu-2004.pkr.hcl
+++ b/examples/ubuntu/ubuntu-2004.pkr.hcl
@@ -7,25 +7,6 @@ packer {
   }
 }
 
-# This local determines what Ubuntu iso URL and sha256 hash we lookup. Updating
-# this will allow a new version to be pulled in.
-local "ubuntu_version" {
-  expression = "22.04"
-}
-
-
-data "http" "ubuntu_sha_and_release" {
-  url = "https://releases.ubuntu.com/22.04/SHA256SUMS"
-}
-
-local "ubuntu_sha256" {
-  expression = regex("([A-Za-z0-9]+)[\\s\\*]+ubuntu-.*server", data.http.ubuntu_sha_and_release.body)
-}
-
-local "ubuntu_url_path" {
-  expression = regex("[A-Za-z0-9]+[\\s\\*]+ubuntu-${local.ubuntu_version}.(\\d+)-live-server-amd64.iso", data.http.ubuntu_sha_and_release.body)
-}
-
 variable "remote_host" {
   type        = string
   description = "The ip or fqdn of your XenServer. This will be pulled from the env var 'PKR_VAR_XAPI_HOST'"
@@ -67,9 +48,9 @@ locals {
 
 
 source "xenserver-iso" "ubuntu-2004" {
-  iso_checksum      = local.ubuntu_sha256.0
+  iso_checksum      = "5035be37a7e9abbdc09f0d257f3e33416c1a0fb322ba860d42d74aa75c3468d4"
   iso_checksum_type = "sha256"
-  iso_url           = "https://releases.ubuntu.com/22.04/ubuntu-22.04.${local.ubuntu_url_path.0}-live-server-amd64.iso"
+  iso_url           = "http://releases.ubuntu.com/20.04/ubuntu-20.04.5-live-server-amd64.iso"
 
   sr_iso_name    = var.sr_iso_name
   sr_name        = var.sr_name
@@ -84,7 +65,7 @@ source "xenserver-iso" "ubuntu-2004" {
   vm_name        = "packer-ubuntu-2004-${local.timestamp}"
   vm_description = "Build started: ${local.timestamp}"
   vm_memory      = 4096
-  disk_size      = 30720
+  disk_size      = 20000
 
   floppy_files = [
     "examples/http/ubuntu-2004/meta-data",