Create vlan.tf

Author: RichardORCL

cloud-infrastructure/virtualization-solutions/openshift-on-oci/openshift-floating-egress-ip/tf_Create_and_Add_VLAN/vlan.tf

@@ -0,0 +1,93 @@
+#====================================================
+# Create VLAN and assign to OpenShift Worker Nodes 
+#====================================================
+
+terraform {
+  required_providers {
+    oci = {
+      source  = "oracle/oci"
+      version = "~> 5.0"
+    }
+  }
+}
+
+provider "oci" {
+}
+
+#====================================================
+# Define variables
+#====================================================
+variable "OpenShiftNameSpace" {
+  description = "The namespace for the OpenShift environment"
+  type        = string
+  default     = "---OCI Namespace that is being used for your OpenShift Cluster---"
+}
+
+variable "compartment_id" {
+  description = "The compartment OCID in which to create resources"
+  type        = string
+  default     = "---OCID of the Compartment the OpenShift cluster is in---"
+}
+
+variable "vcn_id" {
+  description = "The OCID of the VCN in which the VLAN (subnet) will be created"
+  type        = string
+  default     = "---OCID of the VCN your are using---"
+}
+
+variable "vlan_cidr" {
+  description = "The CIDR block for the VLAN (subnet) to be created"
+  type        = string
+  default     = "10.0.101.0/24"  # Change to CIDR range that is part of your VCN and is still available
+}
+
+variable "vlan_name" {
+  description = "Name of the VLAN"
+  type        = string
+  default     = "EgressVLAN"   
+}
+
+#====================================================
+# Create VLAN in existing (specified) VCN
+#====================================================
+resource "oci_core_vlan" "new_vlan" {
+  compartment_id = var.compartment_id
+  vcn_id         = var.vcn_id
+  cidr_block     = var.vlan_cidr
+  display_name   = "vlan-${var.vlan_name}"
+}
+
+#====================================================
+# DATA SOURCE: GET Openshift Worker Nodes based on tag
+#====================================================
+data "oci_core_instances" "compute_instances" {
+  compartment_id = var.compartment_id
+
+  filter {
+    # Use defined tag filtering syntax: defined_tags.<namespace>.<tag-key>
+    name   = "defined_tags.${var.OpenShiftNameSpace}.instance-role"
+    values = ["compute"]
+  }
+}
+
+#====================================================
+# LOCALS: Create list of Worker nodes instances
+#====================================================
+locals {
+  compute_instances = {
+    for instance in data.oci_core_instances.compute_instances.instances :
+    instance.id => instance
+  }
+}
+
+#====================================================
+# Attach VLAN to each worker node
+#====================================================
+resource "oci_core_vnic_attachment" "vlan_vnic" {
+  for_each = local.compute_instances
+    instance_id = each.key
+    create_vnic_details{
+      display_name = "vlan-${var.vlan_name}"    
+      vlan_id = oci_core_vlan.new_vlan.id
+    }
+}