added local DVD install example

examples/centos/centos8-local.pkr.hcl

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+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'"
+  sensitive   = true
+  default     = null
+}
+
+variable "remote_password" {
+  type        = string
+  description = "The password used to interact with your XenServer. This will be pulled from the env var 'PKR_VAR_XAPI_PASSWORD'"
+  sensitive   = true
+  default     = null
+}
+
+variable "remote_username" {
+  type        = string
+  description = "The username used to interact with your XenServer. This will be pulled from the env var 'PKR_VAR_XAPI_USERNAME'"
+  sensitive   = true
+  default     = null
+
+}
+
+variable "sr_iso_name" {
+  type        = string
+  default     = ""
+  description = "The ISO-SR to packer will use"
+
+}
+
+variable "sr_name" {
+  type        = string
+  default     = ""
+  description = "The name of the SR to packer will use"
+}
+
+locals {
+  timestamp = regex_replace(timestamp(), "[- TZ:]", "") 
+}
+
+source "xenserver-iso" "centos8-local" {
+  iso_checksum      = "aaf9d4b3071c16dbbda01dfe06085e5d0fdac76df323e3bbe87cce4318052247"
+  iso_checksum_type = "sha1"
+  iso_url           = "http://mirrors.ocf.berkeley.edu/centos/8.3.2011/isos/x86_64/CentOS-8.3.2011-x86_64-dvd1.iso"
+
+  sr_iso_name    = var.sr_iso_name
+  sr_name        = var.sr_name
+  tools_iso_name = "guest-tools.iso"
+
+  remote_host     = var.remote_host
+  remote_password = var.remote_password
+  remote_username = var.remote_username
+
+  vm_name        = "packer-centos8-local-${local.timestamp}"
+  vm_description = "Build started: ${local.timestamp}\n This was installed From the dvd"
+  vm_memory      = 4096
+  disk_size      = 4096
+
+  http_directory = "examples/http/centos8"
+  boot_command   = ["<tab> text ks=http://{{ .HTTPIP }}:{{ .HTTPPort }}/ks-centos8-local.cfg<enter><wait>"]
+  boot_wait      = "10s"
+
+  ssh_username     = "root"
+  ssh_password     = "centos"
+  ssh_wait_timeout = "10000s"
+  shutdown_command = "/sbin/shutdown"
+
+  output_directory = "packer-centos8-local"
+  keep_vm          = "always"
+}
+
+build {
+  sources = ["xenserver-iso.centos8-local"]
+}

examples/http/centos8/ks-centos8-local.cfg

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+eula --agreed
+lang en-US.UTF-8
+keyboard --vckeymap='de' --xlayouts='de'
+timezone Europe/Berlin
+
+cdrom
+
+text
+skipx
+firstboot --disable
+
+rootpw --plaintext centos
+
+firewall --enabled --ssh
+selinux --enforcing
+
+# Installation logging level
+logging --level=info
+
+network  --bootproto=dhcp --device=eth0 --onboot=on
+
+# System bootloader configuration
+bootloader --location=mbr
+zerombr
+clearpart --all
+
+# Disk partitioning information
+part / --asprimary --fstype="ext4" --size=1024 --grow
+
+
+%addon com_redhat_kdump --disable
+%end
+
+%packages --ignoremissing --excludedocs
+openssh-clients
+sudo
+
+# unnecessary firmware
+-aic94xx-firmware*
+-alsa-*
+-ivtv-*
+-iwl*firmware
+%end
+
+# Reboot after installation
+reboot --eject
+