👀 Views: 230 💬 Answers: 1 📅 Created: 2025-06-14

oci terraform networking hcl

I'm collaborating on a project where I'm integrating two systems and I'm having trouble establishing connectivity between my OCI compute instance and a private subnet that I created using Terraform. The compute instance is supposed to access resources in the private subnet, but I'm getting a 'Connection timed out' behavior when I try to reach the private IP of an instance within that subnet. I've set up the necessary security lists and route tables, but it seems like something is missing. Here's the relevant part of my Terraform configuration for the VCN and subnet: ```hcl resource "oci_core_virtual_network" "my_vcn" { cidr_block = "10.0.0.0/16" display_name = "my_vcn" } resource "oci_core_subnet" "my_private_subnet" { vcn_id = oci_core_virtual_network.my_vcn.id cidr_block = "10.0.1.0/24" display_name = "my_private_subnet" prohibit_public_ip_on_vnic = true } ``` And here’s the instance definition: ```hcl resource "oci_core_instance" "my_instance" { availability_domain = "<your_availability_domain>" compartment_id = var.compartment_id shape = "VM.Standard2.1" subnet_id = oci_core_subnet.my_private_subnet.id display_name = "my_instance" } ``` I’ve also confirmed that my security list associated with the private subnet allows ingress and egress for the relevant ports, but the scenario continues. Here’s the security list configuration: ```hcl resource "oci_core_security_list" "my_security_list" { compartment_id = var.compartment_id vcn_id = oci_core_virtual_network.my_vcn.id display_name = "my_security_list" ingress_security_rules { protocol = "6" source = "10.0.0.0/16" tcp_options { min = 22 max = 22 } } egress_security_rules { protocol = "all" destination = "0.0.0.0/0" } } ``` I've tried troubleshooting by checking the following: - Ensuring that the instance has a private IP assigned correctly. - Verifying that the instance is in the correct availability domain. - Making sure that there are no Network Security Groups (NSGs) that could be blocking traffic. Yet, I continue to face the connectivity scenario. What could I be missing? Is there any common oversight in OCI networking configurations that could lead to this question? I recently upgraded to Hcl 3.10. Could this be a known issue? This is happening in both development and production on Ubuntu 22.04. I'd be grateful for any help. Any ideas what could be causing this?