test: add network template tests

tests/.gitignore

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+output

tests/network/golden/dhcp-autoinstall

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+  network:
+    network:
+      version: 2
+      ethernets:
+        eth0:
+          dhcp4: true

tests/network/golden/dhcp-kickstart

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+network --device=eth0 --bootproto=dhcp

tests/network/golden/dhcp-preseed

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+d-i netcfg/choose_interface select eth0

tests/network/golden/static-autoinstall

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+  network:
+    network:
+      version: 2
+      ethernets:
+        eth0:
+          dhcp4: false
+          addresses:
+            - 192.168.100.192/24
+          gateway4: 192.168.100.1
+          nameservers:
+            addresses:
+              - 192.168.100.3
+              - 192.168.100.1

tests/network/golden/static-kickstart

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+network --device=eth0 --bootproto=static --ip=192.168.100.192 --netmask=255.255.255.0 --gateway=192.168.100.1 --nameserver=192.168.100.3,192.168.100.1

tests/network/golden/static-preseed

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+d-i netcfg/choose_interface select eth0
+d-i netcfg/disable_autoconfig boolean true
+d-i netcfg/get_ipaddress string 192.168.100.192
+d-i netcfg/get_netmask string 255.255.255.0
+d-i netcfg/get_gateway string 192.168.100.1
+d-i netcfg/get_nameservers string 192.168.100.3 192.168.100.1
+d-i netcfg/confirm_static boolean true

tests/network/templates/autoinstall.pkrtpl

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+  network:
+    network:
+      version: 2
+      ethernets:
+%{ if ip != null ~}
+        ${device}:
+          dhcp4: false
+          addresses:
+            - ${ip}/${netmask}
+          gateway4: ${gateway}
+          nameservers:
+            addresses:
+%{ for item in dns ~}
+              - ${item}
+%{ endfor ~}
+%{ else ~}
+        ${device}:
+          dhcp4: true
+%{ endif ~}

tests/network/templates/kickstart.pkrtpl

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+%{~ if ip != null ~}
+network --device=${device} --bootproto=static --ip=${ip} --netmask=${cidrnetmask("${ip}/${netmask}")} --gateway=${gateway} --nameserver=${join(",", dns)}
+%{~ else ~}
+network --device=${device} --bootproto=dhcp
+%{~ endif ~}

tests/network/templates/preseed.pkrtpl

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+d-i netcfg/choose_interface select ${device}
+%{ if ip != null ~}
+d-i netcfg/disable_autoconfig boolean true
+d-i netcfg/get_ipaddress string ${ip}
+d-i netcfg/get_netmask string ${cidrnetmask("${ip}/${netmask}")}
+d-i netcfg/get_gateway string ${gateway}
+d-i netcfg/get_nameservers string ${join(" ", dns)}
+d-i netcfg/confirm_static boolean true
+%{ endif ~}

tests/network/test

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+#!/usr/bin/env bats
+
+setup() {
+  DIR="$( cd "$( dirname "$BATS_TEST_FILENAME" )" >/dev/null 2>&1 && pwd )"
+  echo "$DIR"
+  packer init -upgrade "$DIR"
+}
+
+teardown() {
+  rm -f /tmp/tmpfile
+}
+
+clean_blank_lines() {
+  # Remove any blank lines that HCL likes to leave around
+  awk 'NF' "$1" > /tmp/tmpfile && cat /tmp/tmpfile > "$1"
+}
+
+## Test DHCP
+###############################################################################
+@test "network with Autoinstall using DHCP" {
+  mkdir -p "$DIR/output/dhcp"
+  packer build -var-file="$DIR/test-dhcp.pkrvars.hcl" -var "output_folder=$DIR/output/dhcp" -only "autoinstall.*" "$DIR"
+  run clean_blank_lines "$DIR/output/dhcp/autoinstall"
+  run diff -u "$DIR/output/dhcp/autoinstall" "$DIR/golden/dhcp-autoinstall"
+  [ "$status" -eq 0 ]
+}
+
+@test "network with Kickstart using DHCP" {
+  mkdir -p "$DIR/output/dhcp"
+  packer build -var-file="$DIR/test-dhcp.pkrvars.hcl" -var "output_folder=$DIR/output/dhcp" -only "kickstart.*" "$DIR"
+  run clean_blank_lines "$DIR/output/dhcp/kickstart"
+  run diff -u "$DIR/output/dhcp/kickstart" "$DIR/golden/dhcp-kickstart"
+  [ "$status" -eq 0 ]
+}
+
+@test "network with Preseed using DHCP" {
+  mkdir -p "$DIR/output/dhcp"
+  packer build -var-file="$DIR/test-dhcp.pkrvars.hcl" -var "output_folder=$DIR/output/dhcp" -only "preseed.*" "$DIR"
+  run clean_blank_lines "$DIR/output/dhcp/preseed"
+  run diff -u "$DIR/output/dhcp/preseed" "$DIR/golden/dhcp-preseed"
+  [ "$status" -eq 0 ]
+}
+
+## Test static IP
+###############################################################################
+@test "network with Autoinstall using static IP" {
+  mkdir -p "$DIR/output/static"
+  packer build -var-file="$DIR/test-static.pkrvars.hcl" -var "output_folder=$DIR/output/static" -only "autoinstall.*" "$DIR"
+  run clean_blank_lines "$DIR/output/static/autoinstall"
+  run diff -u "$DIR/output/static/autoinstall" "$DIR/golden/static-autoinstall"
+  [ "$status" -eq 0 ]
+}
+
+@test "network with Kickstart using static IP" {
+  mkdir -p "$DIR/output/static"
+  packer build -var-file="$DIR/test-static.pkrvars.hcl" -var "output_folder=$DIR/output/static" -only "kickstart.*" "$DIR"
+  run clean_blank_lines "$DIR/output/static/kickstart"
+  run diff -u "$DIR/output/static/kickstart" "$DIR/golden/static-kickstart"
+  [ "$status" -eq 0 ]
+}
+
+@test "network with Preseed using static IP" {
+  mkdir -p "$DIR/output/static"
+  packer build -var-file="$DIR/test-static.pkrvars.hcl" -var "output_folder=$DIR/output/static" -only "preseed.*" "$DIR"
+  run clean_blank_lines "$DIR/output/static/preseed"
+  run diff -u "$DIR/output/static/preseed" "$DIR/golden/static-preseed"
+  [ "$status" -eq 0 ]
+}

tests/network/test-dhcp.pkrvars.hcl

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+// Nothing to set for DHCP

tests/network/test-static.pkrvars.hcl

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+vm_ip_address = "192.168.100.192"
+vm_ip_netmask = 24
+vm_ip_gateway = "192.168.100.1"
+vm_dns_list   = ["192.168.100.3", "192.168.100.1"]

tests/network/test.pkr.hcl

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+source "null" "test" {
+  communicator = "none"
+}
+
+locals {
+  autoinstall = templatefile("${abspath(path.root)}/templates/autoinstall.pkrtpl", {
+    device  = var.vm_network_device,
+    ip      = var.vm_ip_address,
+    netmask = var.vm_ip_netmask,
+    gateway = var.vm_ip_gateway,
+    dns     = var.vm_dns_list,
+  })
+  kickstart = templatefile("${abspath(path.root)}/templates/kickstart.pkrtpl", {
+    device  = var.vm_network_device,
+    ip      = var.vm_ip_address,
+    netmask = var.vm_ip_netmask,
+    gateway = var.vm_ip_gateway,
+    dns     = var.vm_dns_list,
+  })
+  preseed = templatefile("${abspath(path.root)}/templates/preseed.pkrtpl", {
+    device  = var.vm_network_device,
+    ip      = var.vm_ip_address,
+    netmask = var.vm_ip_netmask,
+    gateway = var.vm_ip_gateway,
+    dns     = var.vm_dns_list,
+  })
+}
+
+build {
+  name    = "autoinstall"
+  sources = ["source.null.test"]
+  provisioner "shell-local" {
+    inline = [
+      "echo '${local.autoinstall}' > ${var.output_folder}/autoinstall",
+    ]
+  }
+}
+
+build {
+  name    = "kickstart"
+  sources = ["source.null.test"]
+  provisioner "shell-local" {
+    inline = [
+      "echo '${local.kickstart}' > ${var.output_folder}/kickstart",
+    ]
+  }
+}
+
+build {
+  name    = "preseed"
+  sources = ["source.null.test"]
+  provisioner "shell-local" {
+    inline = [
+      "echo '${local.preseed}' > ${var.output_folder}/preseed",
+    ]
+  }
+}

tests/network/variables.pkr.hcl

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+variable "vm_network_device" {
+  type        = string
+  description = "The network device of the VM."
+  default     = "eth0"
+}
+
+variable "vm_ip_address" {
+  type        = string
+  description = "The IP address of the VM (e.g. 172.16.100.192)."
+  default     = null
+}
+
+variable "vm_ip_netmask" {
+  type        = number
+  description = "The netmask of the VM (e.g. 24)."
+  default     = null
+}
+
+variable "vm_ip_gateway" {
+  type        = string
+  description = "The gateway of the VM (e.g. 172.16.100.1)."
+  default     = null
+}
+
+variable "vm_dns_list" {
+  type        = list(string)
+  description = "The nameservers of the VM."
+  default     = []
+}
+
+variable "output_folder" {
+  type        = string
+  description = "The output folder for the generated files."
+}