add host_image_id ALIAS for CENTOS

locals.tf

@@ -18,7 +18,7 @@ locals {
   availability_domain = data.oci_identity_availability_domains.ad_list.availability_domains[var.ad_index - 1].name
   resource_name       = var.resource_name == "" ? data.oci_identity_compartment.compartment.name : var.resource_name
   resource_shortname  = lower(replace(local.resource_name, "-", ""))
-  host_image_id       = var.host_image_id == "OEL" || var.host_image_id == "WIN" ? data.oci_core_images.oracle_images.images.0.id : var.host_image_id
+  host_image_id       = var.host_image_id == "CENTOS" || var.host_image_id == "OEL" || var.host_image_id == "WIN" ? data.oci_core_images.oracle_images.images.0.id : var.host_image_id
   #default_private_dns = cidrhost(cidrsubnet(var.vcn_cidr, var.private_newbits, var.private_netnum), var.tvd_dns_hostnum)
   #vcn_cidr            = data.oci_core_vcn.vcn.cidr_block
 }