Add support for preemptible worker nodes

Author: rppala90

modules/oke/nodepools.tf

@@ -32,6 +32,15 @@ resource "oci_containerengine_node_pool" "nodepools" {
       content {
         availability_domain = ad_iterator.value
         subnet_id           = var.cluster_subnets["workers"]
+        dynamic "preemptible_node_config" {
+          for_each = lookup(lookup(each.value, "preemptible_config", {}), "enable", false)? [1]: []
+          content {
+            preemption_action {
+              type                    = "TERMINATE"
+              is_preserve_boot_volume = lookup(lookup(each.value, "preemptible_config", {}), "is_preserve_boot_volume", false)
+            }
+          }
+        }
       }
     }
 

terraform.tfvars.example

@@ -205,6 +205,16 @@ enable_pv_encryption_in_transit = false
 kubeproxy_mode = "iptables"
 node_pools = {
   # Basic node pool
+  #preemptible = {
+  #  shape            = "VM.Standard.1.1",
+  #  ocpus            = 1,
+  #  memory           = 1,
+  #  node_pool_size   = 1,
+  #  boot_volume_size = 150,
+  #  eviction_grace_duration = 0,  //Grade duration in minutes. Service default is 60.
+  #  force_node_delete       = true
+  #  preemptible_config = {"enable": true, "is_preserve_boot_volume": true}
+  #}
   #np1 = {
   #  shape            = "VM.Standard.E4.Flex",
   #  ocpus            = 2,

versions.tf

@@ -6,7 +6,7 @@ terraform {
     oci = {
       source                = "oracle/oci"
       configuration_aliases = [oci.home]
-      version               = "~> 4.114.0"
+      version               = "~> 4.115.0"
     }
   }
   required_version = ">= 1.2.0"