Fail fast in image generation if not enough disk space for customers

images/linux/scripts/installers/validate-disk-space.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+################################################################################
+##  File:  validate-disk-space.sh
+##  Desc:  Validate free disk space
+################################################################################
+
+availableSpaceMB=$(df / -hm | sed 1d | awk '{ print $4}')
+minimumFreeSpaceMB=$(( 18*1024 ))
+
+echo "Available disk space: $availableSpaceMB MB"
+if [ $availableSpaceMB -le $minimumFreeSpaceMB ]; then
+    echo "Not enough disk space on the image (minimum available space: $minimumFreeSpaceMB MB)"
+    exit 1
+fi

images/linux/ubuntu1604.json

@@ -306,6 +306,12 @@
             ],
             "execute_command": "sudo sh -c '{{ .Vars }} {{ .Path }}'"
         },
+        {
+            "type": "shell",
+            "scripts":[
+                "{{template_dir}}/scripts/installers/validate-disk-space.sh"
+            ]
+        },
         {
             "type": "file",
             "source": "{{user `metadata_file`}}",

images/linux/ubuntu1804.json

@@ -310,6 +310,12 @@
             ],
             "execute_command": "sudo sh -c '{{ .Vars }} {{ .Path }}'"
         },
+        {
+            "type": "shell",
+            "scripts":[
+                "{{template_dir}}/scripts/installers/validate-disk-space.sh"
+            ]
+        },
         {
             "type": "file",
             "source": "{{user `metadata_file`}}",

images/win/Windows2016-Azure.json

@@ -883,6 +883,12 @@
                 "{{ template_dir }}/scripts/Installers/Validate-Kind.ps1"
             ]
         },
+        {
+            "type": "powershell",
+            "scripts":[
+                "{{ template_dir }}/scripts/Installers/Validate-DiskSpace.ps1"
+            ]
+        },
         {
             "type": "file",
             "source": "C:\\InstalledSoftware.md",

images/win/Windows2019-Azure.json

@@ -886,6 +886,12 @@
                 "{{ template_dir }}/scripts/Installers/Validate-AliyunCli.ps1"
             ]
         },
+        {
+            "type": "powershell",
+            "scripts":[
+                "{{ template_dir }}/scripts/Installers/Validate-DiskSpace.ps1"
+            ]
+        },
         {
             "type": "file",
             "source": "C:\\InstalledSoftware.md",

images/win/scripts/Installers/Validate-DiskSpace.ps1

@@ -0,0 +1,14 @@
+################################################################################
+##  File:  Validate-DiskSpace.ps1
+##  Desc:  Validate free disk space
+################################################################################
+
+$availableSpaceMB =  [math]::Round((Get-PSDrive -Name C).Free / 1MB)
+$minimumFreeSpaceMB = 15 * 1024
+
+Write-Host "Available disk space: $availableSpaceMB MB"
+if ($availableSpaceMB -le $minimumFreeSpaceMB)
+{
+    Write-Host "Not enough disk space on the image (minimum available space: $minimumFreeSpaceMB MB)"
+    exit 1
+}