add compute instances, static ip

oci.compute.tf

@@ -1,5 +1,66 @@
-resource "tls_private_key" "ssh_key" {
-  count = var.compute_ssh_key == null ? 1 : 0
+resource "tls_private_key" "compute_ssh_key" {
+  count = var.supplied_compute_ssh_public_key == null ? 1 : 0
 
-  algorithm = var.created_ssh_key_algorithm
+  algorithm = var.created_compute_ssh_key_algorithm
+}
+
+resource "oci_core_instance" "compute" {
+  for_each = local.compute_for_each_value
+
+  compartment_id      = oci_identity_compartment.compartment.id
+  availability_domain = local.compute_availability_domains[each.value.key][0]
+  display_name        = join("", [var.prefix, each.value.key, each.value.index])
+  shape               = local.compute_shapes[each.value.key]
+  dynamic "shape_config" {
+    for_each = each.value.key == "flex" ? [1] : []
+    content {
+      memory_in_gbs = 24
+      ocpus         = 4
+    }
+  }
+  create_vnic_details {
+    assign_ipv6ip  = var.enable_ipv6
+    display_name   = join("", [var.prefix, each.value.key, each.value.index])
+    hostname_label = join("", [local.compute_dns_labels[each.value.key], each.value.index])
+    subnet_id      = oci_core_subnet.public.id
+    nsg_ids        = [oci_core_network_security_group.default.id]
+    freeform_tags  = merge(local.freeform_tags, { type = each.value.key })
+  }
+  is_pv_encryption_in_transit_enabled = true # only used on creation
+  launch_options {
+    is_pv_encryption_in_transit_enabled = true # only used on update
+    is_consistent_volume_naming_enabled = true
+    network_type                        = "PARAVIRTUALIZED"
+  }
+  source_details {
+    source_type                     = "image"
+    source_id                       = data.oci_core_images.selected[each.value.key].images[0].id
+    boot_volume_size_in_gbs         = each.value.key == "flex" ? 100 : 50
+    boot_volume_vpus_per_gb         = 120
+    is_preserve_boot_volume_enabled = false
+  }
+  metadata = {
+    ssh_authorized_keys = local.compute_ssh_key
+    user_data           = try(file("${path.module}/files/user_data.${each.value.key}.sh"), null)
+  }
+  availability_config {
+    is_live_migration_preferred = true
+    recovery_action             = "RESTORE_INSTANCE"
+  }
+  freeform_tags = merge(local.freeform_tags, { type = each.value.key })
+
+  lifecycle {
+    ignore_changes = [
+      # don't replace running instances when latest available image changes
+      source_details.0.source_id
+    ]
+  }
+}
+
+resource "oci_core_public_ip" "static" {
+  count          = var.create_static_ip ? 1 : 0
+  compartment_id = oci_identity_compartment.compartment.id
+  lifetime       = "RESERVED"
+  display_name   = join("", [var.prefix, "static-ip"])
+  # private_ip_id = var.attach_static_ip_to_flex ? data.oci_core_private_ips.flex.private_ips[0].id : null
 }

oci.data.tf

@@ -1,3 +1,37 @@
 data "oci_identity_tenancy" "tenancy" {
   tenancy_id = var.tenancy_id
 }
+
+data "oci_identity_availability_domains" "available" {
+  compartment_id = oci_identity_compartment.compartment.id
+}
+
+data "oci_core_shapes" "available" {
+  for_each = {
+    for item in data.oci_identity_availability_domains.available.availability_domains :
+    item.name => item
+  }
+
+  availability_domain = each.key
+  compartment_id      = oci_identity_compartment.compartment.id
+}
+
+data "oci_core_images" "selected" {
+  for_each         = try(local.compute_shapes, {})
+  compartment_id   = oci_identity_compartment.compartment.id
+  operating_system = "Canonical Ubuntu"
+  shape            = each.value
+  state            = "available"
+  filter {
+    name   = "display_name"
+    values = ["^Canonical-Ubuntu-\\d{1,2}\\.\\d{1,2}-(aarch64-)?[\\.0-9-]+$"]
+    regex  = true
+  }
+}
+
+# data "oci_core_private_ips" "flex" {
+#   count = (var.create_static_ip && var.attach_static_ip_to_flex) ? 1 : 0
+#
+#   ip_address = oci_core_instance.compute["flex_1"].private_ip
+#   subnet_id  = oci_core_subnet.public.id
+# }

oci.locals.tf

@@ -5,7 +5,48 @@ locals {
     "iac/source"    = var.iac_project_source
     "iac/component" = var.iac_project_name
   }
-  # vcn dns label must be only alphanumeric and max 15 chars
-  vcn_dns_label   = substr(replace(join("", [var.prefix, "vcn"]), "/(?i)[^0-9a-z]/", ""), 0, 15)
-  compute_ssh_key = coalesce(var.compute_ssh_key, trimspace(tls_private_key.ssh_key[0].public_key_openssh))
+  # dns label must be only alphanumeric and max 15 chars
+  vcn_dns_label = substr(replace(join("", [var.prefix, "vcn"]), "/(?i)[^0-9a-z]/", ""), 0, 15)
+  compute_dns_labels = {
+    # reduce 1 from max length because an index suffix gets added later
+    micro = substr(replace(join("", [var.prefix, "micro"]), "/(?i)[^0-9a-z]/", ""), 0, 14)
+    flex  = substr(replace(join("", [var.prefix, "flex"]), "/(?i)[^0-9a-z]/", ""), 0, 14)
+  }
+  compute_ssh_key = coalesce(
+    var.supplied_compute_ssh_public_key,
+    trimspace(tls_private_key.compute_ssh_key[0].public_key_openssh)
+  )
+
+  compute_shapes = {
+    micro = "VM.Standard.E2.1.Micro"
+    flex  = "VM.Standard.A1.Flex"
+  }
+
+  compute_counts = {
+    micro = var.create_instances.micro ? 2 : 0
+    flex  = var.create_instances.flex ? 1 : 0
+  }
+
+  compute_availability_domains = {
+    micro = !var.create_instances.micro ? [] : [
+      for domain, value in data.oci_core_shapes.available :
+      domain if contains(value.shapes.*.name, local.compute_shapes.micro)
+    ]
+    flex = !var.create_instances.flex ? [] : [
+      for domain, value in data.oci_core_shapes.available :
+      domain if contains(value.shapes.*.name, local.compute_shapes.flex)
+    ]
+  }
+
+  # { micro_1 = micro, micro_2 = micro, flex_1 = flex }
+  compute_for_each_value = {
+    for item in toset(flatten([
+      for shape in keys(local.compute_shapes) : [
+        for n in range(local.compute_counts[shape]) : "${shape}_${n + 1}"
+    ]])) :
+    item => {
+      key   = split("_", item)[0]
+      index = split("_", item)[1]
+    }
+  }
 }

terraform.outputs.tf

@@ -89,6 +89,26 @@ output "ssh_key_public" {
 
 output "ssh_key_private" {
   description = "The created SSH private key for the compute instances"
-  value       = try(tls_private_key.ssh_key[0].private_key_pem, null)
+  value       = try(trimspace(tls_private_key.compute_ssh_key[0].private_key_pem), null)
   sensitive   = true
 }
+
+output "reserved_ip" {
+  description = "The reserved public IP address"
+  value       = oci_core_public_ip.static[0].ip_address
+}
+
+output "instance_ips" {
+  description = "The public IP addresses of the instances"
+  value       = { for k, v in oci_core_instance.compute : k => v.public_ip }
+}
+
+output "instance_availability_domains" {
+  description = "The availability domains of the instances"
+  value       = { for k, v in oci_core_instance.compute : k => v.availability_domain }
+}
+
+output "instance_selected_images" {
+  description = "The selected images for each instance shape"
+  value       = { for k, v in data.oci_core_images.selected : k => v.images[0].display_name }
+}

terraform.variables.tf

@@ -81,13 +81,13 @@ variable "use_vault" {
   }
 }
 
-variable "compute_ssh_key" {
+variable "supplied_compute_ssh_public_key" {
   description = "A pre-created public SSH key for the compute instances"
   type        = string
   default     = null
 }
 
-variable "created_ssh_key_algorithm" {
+variable "created_compute_ssh_key_algorithm" {
   description = "The algorithm for the created SSH key if no key is provided"
   type        = string
   default     = "ED25519"