replace VM if cloudinit image is replaced

cloud_init.cfg.tftpl

@@ -1,17 +1,7 @@
 #cloud-config
-hostname: dns
+hostname: "${name}"
 manage_etc_hosts: true
 ssh_pwauth: false
 disable_root: false
 ssh_authorized_keys:
   - "${host_public_key}"
-chpasswd:
-  list: |
-    root:root
-  expire: False
-packages:
-  - qemu-guest-agent
-  - dnsmasq
-  - dnsutils
-package_update: true
-package_upgrade: true

dnsmasq.conf

@@ -15,9 +15,9 @@ domain=dmz
 # IPv4 DHCP range
 dhcp-range=192.168.30.100,192.168.30.200,infinite
 # Predefined DHCP hosts
-dhcp-host=b8:27:eb:b9:ab:e2,esrom,192.168.30.2
-dhcp-host=b4:2e:99:77:1b:da,max,192.168.30.3
-dhcp-host=d8:5e:d3:47:33:6e,lewis,192.168.30.6
+dhcp-host=b8:27:eb:b9:ab:e2,esrom
+dhcp-host=b4:2e:99:77:1b:da,max
+dhcp-host=d8:5e:d3:47:33:6e,lewis
 # Advertise router
 dhcp-option=3,192.168.30.1
 # Always send the IPv6 DNS server address (this machine)
@@ -36,4 +36,4 @@ server=/pim.kunis.nl/192.168.30.3
 log-dhcp
 log-queries
 # Resolve dns.dmz to addresses on main NIC
-interface-name=dns.dmz,ens3
+interface-name=hermes.dmz,ens3

hermes.yml

@@ -2,9 +2,21 @@
 - hosts: all
   gather_facts: no
   tasks:
-    - name: Wait for cloud init to finish
-      pause:
-        seconds: 120
+    - name: Wait for host to come up
+      wait_for:
+        state: started
+        port: 22
+        host: "{{ internal_ip }}"
+        delay: 10
+        timeout: 300
+        connect_timeout: 300
+        search_regex: OpenSSH
+      delegate_to: localhost
+    - name: Wait for cloud-init to finish
+      command:
+        cmd: cloud-init status --wait
+    - name: Gather facts
+      setup:
     - name: Update repositories
       apt:
         autoremove: true
@@ -12,6 +24,12 @@
         state: latest
         update_cache: yes
         cache_valid_time: 86400 # One day
+    - name: Install packages
+      apt:
+        pkg:
+          - qemu-guest-agent
+          - dnsmasq
+          - dnsutils
     - name: Disable systemd-resolved
       systemd:
         name: systemd-resolved

main.tf

@@ -29,11 +29,11 @@ resource "libvirt_cloudinit_disk" "cloudinit" {
   name           = "${var.name}.iso"
   pool           = "init"
   user_data      = templatefile("cloud_init.cfg.tftpl", { name = var.name, host_public_key = var.host_public_key })
-  network_config = templatefile("network_config.cfg.tftpl", { internal_ip = var.internal_ip})
+  network_config = templatefile("network_config.cfg.tftpl", { internal_ip = var.internal_ip })
 }
 
 resource "libvirt_domain" "ubuntu" {
-  name   = var.name
+  name   = "hermes"
   memory = 1024
   vcpu   = 4
 
@@ -42,15 +42,24 @@ resource "libvirt_domain" "ubuntu" {
   }
 
   network_interface {
-    network_name = "dmzbr"
-    hostname     = "dns"
-    addresses    = ["${var.internal_ip}/24"]
-    mac          = "ca:fe:c0:ff:ee:07"
+    bridge    = "dmzbr"
+    hostname  = var.name
+    mac       = "CA:FE:C0:FF:EE:07"
   }
 
   cloudinit = libvirt_cloudinit_disk.cloudinit.id
 
   provisioner "local-exec" {
-    command = "ANSIBLE_HOST_KEY_CHECKING=False ansible-playbook -T 60 -u root -i inventory ansible.yml"
+    command = "ansible-playbook -e internal_ip=${var.internal_ip} -T 60 -u root -i inventory hermes.yml"
+
+    environment = {
+      ANSIBLE_HOST_KEY_CHECKING = "False"
+    }
+  }
+
+  lifecycle {
+    replace_triggered_by = [
+      libvirt_cloudinit_disk.cloudinit.id
+    ]
   }
 }

variables.tf

@@ -1,5 +1,5 @@
 variable "name" {
-  default = "dmzdns"
+  default = "hermes"
 }
 
 variable "libvirt_endpoint" {