From cf1d7b9c3f100f5f1d9d0e96aa6e826b595dcf11 Mon Sep 17 00:00:00 2001
From: Klaus Smolin <88041391+smolin-de@users.noreply.github.com>
Date: Wed, 16 Aug 2023 14:04:28 +0200
Subject: [PATCH] feat: Detect automatically required RHCOS images for compute
 nodes (#193)

This patch detects the required RHCOS images to install a compute node.

Signed-off-by: Klaus Smolin <smolin@de.ibm.com>
---
 playbooks/create_compute_node.yaml | 45 ++++++++++++++++++++++++++----
 1 file changed, 40 insertions(+), 5 deletions(-)

diff --git a/playbooks/create_compute_node.yaml b/playbooks/create_compute_node.yaml
index 8a5eed2d..f92749b0 100644
--- a/playbooks/create_compute_node.yaml
+++ b/playbooks/create_compute_node.yaml
@@ -9,11 +9,6 @@
 #   hostname: <KVM host name where the VM is created>
 #   host_arch: <KVM host architecture>
 #
-# rhcos_download_url: <your rhcos download url>
-# rhcos_live_kernel: <your live kernel filename>
-# rhcos_live_initrd: <your live initrd filename>
-# rhcos_live_rootfs: <your live rootfs filename>
-#
 # Execute the playbook with '--extra-vars' option.
 # E.g.:
 # ansible-playbook playbooks/add_compute_node.yaml --extra-vars "@extra-cnode1.yml"
@@ -37,6 +32,46 @@
           ansible.builtin.fail:
             msg: "See above error!"
 
+    - name: Get RHCOS iso download url from machine-config-operator
+      ansible.builtin.shell: |
+        set -o pipefail
+        oc -n openshift-machine-config-operator get configmap/coreos-bootimages -o jsonpath='{.data.stream}' \
+        | jq -r '.architectures.{{ day2_compute_node.host_arch }}.artifacts.metal.formats.iso.disk.location'
+      register: _rhcos_iso_dl_url
+
+    - name: Get RHCOS kernel download url from machine-config-operator
+      ansible.builtin.shell: |
+        set -o pipefail
+        oc -n openshift-machine-config-operator get configmap/coreos-bootimages -o jsonpath='{.data.stream}' \
+        | jq -r '.architectures.{{ day2_compute_node.host_arch }}.artifacts.metal.formats.pxe.kernel.location'
+      register: _rhcos_kernel_dl_url
+
+    - name: Get RHCOS initrd download url from machine-config-operator
+      ansible.builtin.shell: |
+        set -o pipefail
+        oc -n openshift-machine-config-operator get configmap/coreos-bootimages -o jsonpath='{.data.stream}' \
+        | jq -r '.architectures.{{ day2_compute_node.host_arch }}.artifacts.metal.formats.pxe.initramfs.location'
+      register: _rhcos_initrd_dl_url
+
+    - name: Get RHCOS rootfs download url from machine-config-operator
+      ansible.builtin.shell: |
+        set -o pipefail
+        oc -n openshift-machine-config-operator get configmap/coreos-bootimages -o jsonpath='{.data.stream}' \
+        | jq -r '.architectures.{{ day2_compute_node.host_arch }}.artifacts.metal.formats.pxe.rootfs.location'
+      register: _rhcos_rootfs_dl_url
+
+    - name: Redefine RHCOS variables
+      ansible.builtin.set_fact:
+        rhcos_live_kernel: "{{ (_rhcos_kernel_dl_url.stdout | split('/') | last) }}"
+        rhcos_live_initrd: "{{ (_rhcos_initrd_dl_url.stdout | split('/') | last) }}"
+        rhcos_live_rootfs: "{{ (_rhcos_rootfs_dl_url.stdout | split('/') | last) }}"
+        rhcos_live_iso: "{{ (_rhcos_iso_dl_url.stdout.split('/')[-1]) }}"
+
+    - name: Redefine RHCOS download url
+      ansible.builtin.set_fact:
+        # Assume all images have same download location
+        rhcos_download_url: "{{ (_rhcos_rootfs_dl_url.stdout | replace(rhcos_live_rootfs, '')) }}"
+
   roles:
     - role: common
     - role: print_node_status