adapt domain creation to controller and worker scenario

Makefile

@@ -41,3 +41,7 @@ stack_init:
 	    -backend-config="cacert_path=$$HOME/virtualization/kubernetes-the-hard-way/certs/ca.pem" \
 	    -backend-config="cert_path=$$HOME/virtualization/kubernetes-the-hard-way/certs/kubernetes.pem" \
 	    -backend-config="key_path=$$HOME/virtualization/kubernetes-the-hard-way/certs/kubernetes-key.pem"
+
+stack_test:
+	cd applications/ && \
+	ansible -m debug -i stack_address.toml all -a "msg=test"

applications/stack_address.toml

@@ -1,11 +1,11 @@
-# two first domain is controller domain
+# controller domain
 [controller]
-compute-0 ansible_host=100.64.0.146 index=0
+compute-0 ansible_host=100.64.0.216 index=0
-compute-1 ansible_host=100.64.0.214 index=1
+# worker domain
-# next domain is worker domain
 [worker]
-compute-2 ansible_host=100.64.0.79 index=0
+compute-1 ansible_host=100.64.0.14 index=0
-compute-3 ansible_host=100.64.0.86 index=1
+compute-2 ansible_host=100.64.0.26 index=1
+compute-3 ansible_host=100.64.0.34 index=2
 
 [all:children]
 controller

stack/cloud_init.tf

@@ -3,7 +3,7 @@ data "template_file" "user_data" {
   vars = {
     hostname = format("%s-%s", var.hostname, count.index)
   }
-  count = var.number_domain
+  count = local.number_domain
 }
 
 data "template_file" "meta_data" {
@@ -11,7 +11,7 @@ data "template_file" "meta_data" {
   vars = {
     instance_id = count.index
   }
-  count = var.number_domain
+  count = local.number_domain
 }
 
 # Use CloudInit to add the instance
@@ -21,5 +21,5 @@ resource "libvirt_cloudinit_disk" "commoninit" {
   user_data = data.template_file.user_data[count.index].rendered
   meta_data = data.template_file.meta_data[count.index].rendered
 
-  count = var.number_domain
+  count = local.number_domain
 }

stack/computes.tf

@@ -2,14 +2,14 @@
 
 # Define KVM domain to create
 
-resource "libvirt_domain" "domains" {
+resource "libvirt_domain" "controllers" {
   name      = format("db%s", count.index)
-  memory    = "1024"
+  memory    = "2048"
-  vcpu      = 1
+  vcpu      = 2
   running   = "true"
   autostart = "true"
 
-  count      = var.number_domain
+  count      = var.number_controller
   qemu_agent = true
 
   boot_device {
@@ -43,3 +43,45 @@ resource "libvirt_domain" "domains" {
     autoport    = "true"
   }
 }
+
+resource "libvirt_domain" "workers" {
+  name      = format("db%s", var.number_controller + count.index)
+  memory    = "1024"
+  vcpu      = 1
+  running   = "true"
+  autostart = "true"
+
+  count      = var.number_worker
+  qemu_agent = true
+
+  boot_device {
+    dev = ["hd", "network"]
+  }
+
+  network_interface {
+    network_id = libvirt_network.private_network.id
+    hostname = format("compute-%s", var.number_controller + count.index)
+  }
+
+  disk {
+    volume_id = libvirt_volume.root_debian[var.number_controller + count.index].id
+  }
+
+  disk {
+    volume_id = libvirt_volume.external_disk[var.number_controller + count.index].id
+  }
+
+  cloudinit = libvirt_cloudinit_disk.commoninit[var.number_controller + count.index].id
+
+  console {
+    type        = "pty"
+    target_type = "serial"
+    target_port = "0"
+  }
+
+  graphics {
+    type        = "vnc"
+    listen_type = "address"
+    autoport    = "true"
+  }
+}

stack/libvirtd.tf

@@ -33,37 +33,45 @@ provider "libvirt" {
   uri = "qemu+tcp://dx30.localdomain/system"
 }
 
-resource "null_resource" "delay_10s" {
+resource "null_resource" "delay_controllers_10s" {
   provisioner "local-exec" {
-    command = "sleep 120"
+    command = "sleep 60"
   }
   triggers = {
-    # trigger after last domain created
+    # trigger after last domain controller and laster domain worker created
-    "after" = libvirt_domain.domains[var.number_domain - 1].id
+    "after" = libvirt_domain.controllers[var.number_controller - 1].id
+  }
+}
+resource "null_resource" "delay_workers_10s" {
+  provisioner "local-exec" {
+    command = "sleep 60"
+  }
+  triggers = {
+    # trigger after last domain controller and laster domain worker created
+    "after" = libvirt_domain.workers[var.number_worker - 1].id
   }
 }
 
 # Output Server IP
 output "ip" {
-  value      = libvirt_domain.domains.*.network_interface
+  value      = concat(libvirt_domain.controllers.*.network_interface, libvirt_domain.workers.*.network_interface)
-  depends_on = [null_resource.delay_10s]
+  depends_on = [null_resource.delay_controllers_10s, null_resource.delay_workers_10s]
 }
 
 resource "local_file" "write_address" {
-
   content = <<-EOT
-# two first domain is controller domain
+# controller domain
 [controller]
-%{ for idx, s in slice(libvirt_domain.domains, 0, 2) ~}
+%{ for idx, s in libvirt_domain.controllers.*.network_interface.0 ~}
-%{ if length(s.network_interface.0.addresses) > 0 ~}
+%{ if length(s.addresses) > 0 ~}
-${s.network_interface.0.hostname} ansible_host=${s.network_interface.0.addresses.0} index=${idx}
+${s.hostname} ansible_host=${s.addresses.0} index=${idx}
 %{ endif ~}
 %{ endfor ~}
-# next domain is worker domain
+# worker domain
 [worker]
-%{ for idx, s in slice(libvirt_domain.domains, 2, length(libvirt_domain.domains)) ~}
+%{ for idx, s in libvirt_domain.workers.*.network_interface.0 ~}
-%{ if length(s.network_interface.0.addresses) > 0 ~}
+%{ if length(s.addresses) > 0 ~}
-${s.network_interface.0.hostname} ansible_host=${s.network_interface.0.addresses.0} index=${idx}
+${s.hostname} ansible_host=${s.addresses.0} index=${idx}
 %{ endif ~}
 %{ endfor ~}
 

stack/variable.tf

@@ -4,10 +4,16 @@ variable "ip" {
   description = "fixed ip address for compute"
 }
 
-variable "number_domain" {
+variable "number_controller" {
-  type        = string
+  type        = number
-  default     = "4"
+  default     = 1
-  description = "number of domain"
+  description = "number of controller domain"
+}
+
+variable "number_worker" {
+  type        = number
+  default     = 3
+  description = "number of worker domain"
 }
 
 variable "hostname" {
@@ -29,6 +35,7 @@ variable "pool_1" {
 }
 
 locals {
+  number_domain = var.number_controller + var.number_worker
   debian_buster_qcow2 = "debian-10.7.0-with-docker.qcow2"
   centos7_qcow2       = "centos7.qcow2"
 }

stack/volumes.tf

@@ -14,7 +14,7 @@ resource "libvirt_volume" "root_debian" {
   name             = format("root-debian-%s", count.index)
   pool             = var.pool_1
   base_volume_name = local.debian_buster_qcow2
-  count            = var.number_domain
+  count            = local.number_domain
 }
 
 resource "libvirt_volume" "external_disk" {
@@ -22,5 +22,5 @@ resource "libvirt_volume" "external_disk" {
   # 10Gb
   size  = 10737418240
   pool  = var.pool_1
-  count = var.number_domain
+  count = local.number_domain
 }