playbooks: add a playbook to configure hugepages

The file etc/hugepages_nb.conf will be read by the hugetlb-gigantic-pages. Signed-off-by: Erwann Roussy <[email protected]>
vermeulenthi · Nov 9, 2022 · 8c8da1a · 8c8da1a
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diff --git a/playbooks/cluster_setup_configure_hosts.yaml b/playbooks/cluster_setup_configure_hosts.yaml
@@ -3,6 +3,7 @@
 # This Ansible playbook configure cluster machines.
 ---
 - import_playbook: cluster_setup_kernel_params.yaml
+- import_playbook: cluster_setup_configure_hugepages.yaml
 - name: remove the static ip previously setup
   hosts: cluster_machines
   tasks:

diff --git a/playbooks/cluster_setup_configure_hugepages.yaml b/playbooks/cluster_setup_configure_hugepages.yaml
@@ -0,0 +1,26 @@
+# Copyright (C) 2022, RTE (http://www.rte-france.com)
+# SPDX-License-Identifier: Apache-2.0
+
+# This Ansible playbook configures the number of hugepages available.
+# It is called by the playbook cluster_setup_configure_host.yaml, but can also
+# be called alone.
+# The number of hugepages has to be at least one.
+# The target must be reload for the change to take effect.
+
+---
+- name: Configure hugepages
+  hosts: hypervisors
+  vars:
+    hugepages_number: "{{ hugepages | default('4') }}"
+  tasks:
+    - name: Setup hugepages number
+      copy:
+        content: "{{ hugepages_number }}"
+        dest: /etc/hugepages_nb.conf
+      notify:
+        - Restart hugepages service
+  handlers:
+    - name: Restart hugepages service
+      ansible.builtin.systemd:
+        name: hugetlb-gigantic-pages.service
+        state: restarted