fb_dnf: add support for managing the perfmetrics plugin

Differential Revision: D62315076

fbshipit-source-id: f5ee750871a74b40668db65ba8ef466ae8c7f448

cookbooks/fb_dnf/README.md

@@ -10,6 +10,7 @@ Attributes
 * node['fb_dnf']['disable_makecache_timer']
 * node['fb_dnf']['manage_packages']
 * node['fb_dnf']['modules'][$MODULE][$CONFIG]
+* node['fb_dnf']['perfmetrics']
 * node['fb_dnf']['repos'][$GROUP]['repos'][$REPO][$KEY][$VALUE]
 
 Usage
@@ -86,3 +87,9 @@ node.default['fb_dnf']['modules']['nodejs'] = {
   'stream' => 13,
 }
 ```
+
+### Perfmetrics
+Setting `node['fb_dnf']['perfmetrics']` to `true` will install and enable the
+[Performance Metrics plugin](https://github.com/filbranden/dnf-plugins-perfmetrics),
+which will record performance metrics for DNF and store them in JSON files
+under `/var/log/dnf/perfmetrics`.

cookbooks/fb_dnf/attributes/default.rb

@@ -31,4 +31,5 @@
   'manage_packages' => true,
   'modules' => {},
   'repos' => {},
+  'perfmetrics' => false,
 }

cookbooks/fb_dnf/recipes/perfmetrics.rb

@@ -0,0 +1,46 @@
+#
+# Cookbook Name:: fb_dnf
+# Recipe:: perfmetrics
+#
+# Copyright (c) 2024-present, Facebook, Inc.
+# All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package 'python3-dnf-plugin-perfmetrics' do
+  only_if { node['fb_dnf']['perfmetrics'] }
+  action :upgrade
+end
+
+config = '/etc/dnf/plugins/perfmetrics.conf'
+
+directory '/var/log/dnf' do
+  only_if { node['fb_dnf']['perfmetrics'] }
+  owner node.root_user
+  group node.root_group
+  mode '0755'
+end
+
+template config do
+  only_if { node['fb_dnf']['perfmetrics'] }
+  source 'perfmetrics.conf.erb'
+  owner node.root_user
+  group node.root_group
+  mode '0644'
+end
+
+file config do
+  not_if { node['fb_dnf']['perfmetrics'] }
+  action :delete
+end

cookbooks/fb_dnf/templates/default/perfmetrics.conf.erb

@@ -0,0 +1,5 @@
+# This file is maintained by Chef. Do not edit, all changes will be
+# overwritten. See fb_dnf/README.md
+
+[main]
+enabled=<%= node['fb_dnf']['perfmetrics'] ? '1' : '0' %>