From e54c934e8d3e64873a83cbac15813310eb89c7cf Mon Sep 17 00:00:00 2001
From: Neeraj Mishra <neeraj@Neerajs-MacBook-Pro.local>
Date: Tue, 31 Mar 2026 01:05:17 +0530
Subject: [PATCH] feat(abi): enable rootDeviceHints support

---
 .../default/group_vars/all.yaml.template      |  3 ++-
 .../templates/agent-config.yaml.j2            | 21 ++++++++++++++++---
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/inventories/default/group_vars/all.yaml.template b/inventories/default/group_vars/all.yaml.template
index 8d5048db2..012a86190 100644
--- a/inventories/default/group_vars/all.yaml.template
+++ b/inventories/default/group_vars/all.yaml.template
@@ -142,7 +142,8 @@ env:
 #         - X
 #         - X
 #         - X
-
+        root_device_hints:
+          - ''
 # Section 9 - Compute Nodes
       compute:
         disk_size: 120
diff --git a/roles/prepare_configs/templates/agent-config.yaml.j2 b/roles/prepare_configs/templates/agent-config.yaml.j2
index 574561f08..03faa3dde 100644
--- a/roles/prepare_configs/templates/agent-config.yaml.j2
+++ b/roles/prepare_configs/templates/agent-config.yaml.j2
@@ -9,6 +9,16 @@ hosts:
 {% for item in range( env.cluster.nodes.control.ip | length ) %}
   - hostname: "{{ env.cluster.nodes.control.hostname[item] }}"
     role: master
+{% if env.cluster.nodes.control.root_device_hints is defined and env.cluster.nodes.control.root_device_hints[item] %}
+    rootDeviceHints:
+      deviceName: "{{ env.cluster.nodes.control.root_device_hints[item] }}"
+{% elif env.lpar.storage_group_1 is defined and env.lpar.storage_group_1.dev_num is defined %}
+    rootDeviceHints:
+      {%- set dev = env.lpar.storage_group_1.dev_num -%}
+      {%- set wwpn = env.lpar.storage_group_1.storage_wwpn[0] -%}
+      {%- set lun = env.lpar.storage_group_1.lun_name %}
+      deviceName: "/dev/disk/by-path/ccw-{{ dev }}-fc-{{ wwpn }}-lun-{{ lun }}"
+{% endif %}
     interfaces:
       - name: eth0
         macAddress: "{{ env.cluster.nodes.control.mac[item] }}"
@@ -33,12 +43,17 @@ hosts:
           - destination: 0.0.0.0/0
             next-hop-address: "{{ env.bastion.networking.gateway }}"
             next-hop-interface: eth0
-            table-id: 254           
+            table-id: 254
 {% endfor %}
+
 {% if env.cluster.nodes.compute.ip is defined %}
 {% for item in range( env.cluster.nodes.compute.ip | length ) %}
   - hostname: "{{ env.cluster.nodes.compute.hostname[item] }}"
     role: worker
+{% if env.cluster.nodes.compute.root_device_hints is defined and env.cluster.nodes.compute.root_device_hints[item] %}
+    rootDeviceHints:
+      deviceName: "{{ env.cluster.nodes.compute.root_device_hints[item] }}"
+{% endif %}
     interfaces:
       - name: eth0
         macAddress: "{{ env.cluster.nodes.compute.mac[item] }}"
@@ -63,7 +78,7 @@ hosts:
           - destination: 0.0.0.0/0
             next-hop-address: "{{ env.bastion.networking.gateway }}"
             next-hop-interface: eth0
-            table-id: 254 
+            table-id: 254
 {% endfor %}
 {% endif %}
-{% endif %}
\ No newline at end of file
+{% endif %}