q35 chipset by default

multiple/shared_modules/domain.tf

@@ -3,6 +3,17 @@ resource "libvirt_domain" "domain" {
   name   = "${var.vm_name}-${count.index}"
   memory = var.memory
   vcpu   = var.vcpu
+  machine = "q35"
+
+  # The chipset q35, which does not support the IDE bus, does not work with the terraform-provider-libvirt cloud-init implementation,
+  # which creates an ISO attached to an IDE bus by default. Workaround is implemented 
+  # https://github.com/dmacvicar/terraform-provider-libvirt/issues/1137#issuecomment-2592329846
+  # A cleaner solution might be the following :
+  # https://github.com/dmacvicar/terraform-provider-libvirt/pull/895#issuecomment-1911167872
+
+  xml {
+    xslt = file("${path.module}/q35-workaround.xslt")
+  }
 
   # Only include cloudinit if enabled
   cloudinit = var.enable_cloudinit ? libvirt_cloudinit_disk.commoninit[count.index].id : null

multiple/shared_modules/q35-workaround.xslt

@@ -0,0 +1,16 @@
+<?xml version="1.0" ?>
+<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+  <xsl:output omit-xml-declaration="yes" indent="yes"/>
+  <xsl:template match="node()|@*">
+     <xsl:copy>
+       <xsl:apply-templates select="node()|@*"/>
+     </xsl:copy>
+  </xsl:template>
+  <xsl:template match="/domain/devices/disk[@device='cdrom']/target/@bus">
+    <xsl:attribute name="bus">
+      <xsl:value-of select="'sata'"/>
+    </xsl:attribute>
+  </xsl:template>
+  
+  <xsl:template match="/domain/devices/disk[@device='cdrom']/alias" />
+</xsl:stylesheet>