From ef1456d94d8a93f6837e89b3cae8e21ba4693e65 Mon Sep 17 00:00:00 2001
From: Mark Goddard <mark@stackhpc.com>
Date: Mon, 27 Mar 2017 16:45:49 +0100
Subject: [PATCH] Add a playbook to trigger discovery of compute nodes

This uses the map of iDRAC hostnames to IP addresses to generate an Ansible
inventory for the compute nodes. The nodes' power states and boot modes are
then set via IPMI.
---
 ansible/compute-node-discovery.yml | 51 ++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 ansible/compute-node-discovery.yml

diff --git a/ansible/compute-node-discovery.yml b/ansible/compute-node-discovery.yml
new file mode 100644
index 000000000..962d99a48
--- /dev/null
+++ b/ansible/compute-node-discovery.yml
@@ -0,0 +1,51 @@
+---
+- name: Ensure compute nodes are present in the Ansible inventory
+  hosts: config-mgmt
+  gather_facts: no
+  tasks:
+    - name: Add hosts for the compute nodes
+      add_host:
+        name: "{{ item.key }}"
+        groups: compute
+      with_dict: "{{ idrac_network_ips }}"
+      # Don't add hosts that already exist.
+      when:
+        - "{{ item.key not in groups['all'] }}"
+        - "{{ item.key | replace('-idrac', '') not in groups['all'] }}"
+      run_once: True
+
+- name: Ensure compute nodes are PXE booted
+  hosts: compute
+  gather_facts: no
+  tasks:
+    - name: Set a fact containing the compute node IPMI address
+      set_fact:
+        ipmi_username: "{{ inspector_ipmi_username }}"
+        ipmi_password: "{{ inspector_ipmi_password }}"
+        ipmi_address: "{{ idrac_network_ips[inventory_hostname] }}"
+
+    - name: Ensure compute nodes are powered off
+      command: ipmitool -U {{ ipmi_username }} -P {{ ipmi_password }} -H {{ ipmi_address }} -I lanplus chassis power off
+      delegate_to: "{{ item }}"
+      with_items:
+        - "{{ hostvars[groups['controllers'][0]].ansible_host }}"
+
+    - name: Pause to prevent overwhelming BMCs
+      pause:
+        seconds: 5
+
+    - name: Ensure compute nodes are set to boot via PXE
+      command: ipmitool -U {{ ipmi_username }} -P {{ ipmi_password }} -H {{ ipmi_address }} -I lanplus chassis bootdev pxe
+      delegate_to: "{{ item }}"
+      with_items:
+        - "{{ hostvars[groups['controllers'][0]].ansible_host }}"
+
+    - name: Pause to prevent overwhelming BMCs
+      pause:
+        seconds: 5
+
+    - name: Ensure compute nodes are powered on
+      command: ipmitool -U {{ ipmi_username }} -P {{ ipmi_password }} -H {{ ipmi_address }} -I lanplus chassis power on
+      delegate_to: "{{ item }}"
+      with_items:
+        - "{{ hostvars[groups['controllers'][0]].ansible_host }}"