From d3444193c2051aedaf3747d578cec1e89f307a48 Mon Sep 17 00:00:00 2001
From: Philippe MILINK <philippe.milink@gmx.fr>
Date: Sun, 5 Jan 2025 23:00:12 +0100
Subject: [PATCH] Ajoute des graphes Munin pour la taille de certains dossiers

---
 roles/munin/files/plugins/du_                 | 70 +++++++++++++++++++
 roles/munin/tasks/main.yml                    | 41 ++++++++++-
 .../templates/plugin-conf.d/du_backup.j2      |  5 ++
 .../munin/templates/plugin-conf.d/du_prod.j2  | 12 ++++
 4 files changed, 125 insertions(+), 3 deletions(-)
 create mode 100755 roles/munin/files/plugins/du_
 create mode 100644 roles/munin/templates/plugin-conf.d/du_backup.j2
 create mode 100644 roles/munin/templates/plugin-conf.d/du_prod.j2

diff --git a/roles/munin/files/plugins/du_ b/roles/munin/files/plugins/du_
new file mode 100755
index 0000000..fce95b1
--- /dev/null
+++ b/roles/munin/files/plugins/du_
@@ -0,0 +1,70 @@
+#!/bin/bash
+
+: <<=cut
+
+=head1 NAME
+
+du - Size of directories
+
+=head1 CONFIGURATION
+
+Put this file in "/usr/local/share/munin/plugins/du_". Then, create a symbolic
+link to this file called, for instance, "du_work". "work" will be the name of
+the graph.
+
+The configuration should look like the following:
+
+[du_work]
+    env.directories /path/to/dir1 /path/to/dir2
+    env.prefix /path/to/
+    env.critical 1073741824
+
+- "directories" contains a space-separated list of directories to report size of.
+- "prefix" (optionnal) is the prefix of directories to hide in graph labels.
+- "critical" (optionnal) is the critical size (in bytes) for all directories.
+
+=cut
+
+GRAPH_NAME=${0##*du_}
+DIRECTORIES=${directories:-UNSET}
+CRITICAL=${critical:-UNSET}
+PREFIX=${prefix:-UNSET}
+
+
+case $1 in
+    config)
+        echo "graph_title Directory size $GRAPH_NAME"
+        echo "graph_category disk"
+        echo "graph_args --base 1024 -l 0"
+        echo "graph_vlabel Size"
+        echo "graph_info Graph of size occupied by directories"
+
+        if [ "$DIRECTORIES" != "UNSET" ]; then
+            for d in $DIRECTORIES
+            do
+                slug=$(echo $d | sed 's/\//_/g')
+
+                if [ "$PREFIX" != "UNSET" ]; then
+                    echo "${slug}.label ${d#"$PREFIX"}"
+                else
+                    echo "${slug}.label $d"
+                fi
+                echo "${slug}.type GAUGE"
+                echo "${slug}.draw LINE1"
+
+                if [ "$CRITICAL" != "UNSET" ]; then
+                    echo "${slug}.critical $CRITICAL"
+                fi
+            done
+        fi
+
+        exit 0;;
+esac
+
+if [ "$DIRECTORIES" != "UNSET" ]; then
+    for d in $DIRECTORIES
+    do
+        slug=$(echo $d | sed 's/\//_/g')
+        echo "${slug}.value $(du -sb $d | cut -f 1)"
+    done
+fi
diff --git a/roles/munin/tasks/main.yml b/roles/munin/tasks/main.yml
index c367e91..25ebca0 100644
--- a/roles/munin/tasks/main.yml
+++ b/roles/munin/tasks/main.yml
@@ -73,11 +73,14 @@
     dest: "{{ munin_available_plugins_dir }}/zmd"
     mode: u=rwx,g=rx,o=rx
 
-- name: copy typesense munin plugin
+- name: copy typesense and du_ munin plugin
   ansible.builtin.copy:
-    src: plugins/typesense
-    dest: "{{ munin_available_plugins_dir }}/typesense"
+    src: "plugins/{{ item }}"
+    dest: "{{ munin_available_plugins_dir }}/{{ item }}"
     mode: u=rwx,g=rx,o=rx
+  with_items:
+    - typesense
+    - du_
 
 - name: create symlinks for munin plugins
   ansible.builtin.file:
@@ -104,6 +107,24 @@
     - { src: postfix_mailvolume, dest: postfix_mailvolume }
   when: installed_postfix_check is succeeded
 
+- name: create symlink to du_backup munin plugin for beta server
+  ansible.builtin.file:
+    src: "{{ munin_available_plugins_dir }}/du_"
+    dest: /etc/munin/plugins/du_backup
+    state: link
+  when: env == "beta"
+
+- name: create symlink to du_ munin plugins for prod server
+  ansible.builtin.file:
+    src: "{{ munin_available_plugins_dir }}/du_"
+    dest: "/etc/munin/plugins/du_{{ item }}"
+    state: link
+  with_items:
+    - mysql-backup
+    - zds-data
+    - zds-db
+  when: env == "prod"
+
 - name: copy configuration file of wget_page munin plugin
   ansible.builtin.template:
     src: plugin-conf.d/wget_page.j2
@@ -122,3 +143,17 @@
     regexp: ^env.mysqluser root
     line: env.mysqluser root
   when: env == "beta"
+
+- name: copy configuration file of du_backup munin plugin for beta server
+  ansible.builtin.template:
+    src: plugin-conf.d/du_backup.j2
+    dest: /etc/munin/plugin-conf.d/du_backup
+    mode: u=rw,g=r,o=r
+  when: env == "beta"
+
+- name: copy configuration file of du_munin plugins for prod server
+  ansible.builtin.template:
+    src: plugin-conf.d/du_prod.j2
+    dest: /etc/munin/plugin-conf.d/du
+    mode: u=rw,g=r,o=r
+  when: env == "prod"
diff --git a/roles/munin/templates/plugin-conf.d/du_backup.j2 b/roles/munin/templates/plugin-conf.d/du_backup.j2
new file mode 100644
index 0000000..703caee
--- /dev/null
+++ b/roles/munin/templates/plugin-conf.d/du_backup.j2
@@ -0,0 +1,5 @@
+[du_backup]
+user root
+env.directories {{ backupdir }}/data {{ backupdir }}/db {{ backupdir }}/matomo {{ backupdir }}/vaultwarden
+env.prefix {{ backupdir }}/
+env.critical 161061273600  # 150 Go
diff --git a/roles/munin/templates/plugin-conf.d/du_prod.j2 b/roles/munin/templates/plugin-conf.d/du_prod.j2
new file mode 100644
index 0000000..e558b3e
--- /dev/null
+++ b/roles/munin/templates/plugin-conf.d/du_prod.j2
@@ -0,0 +1,12 @@
+[du_mysql-backup]
+user root
+env.directories /var/backups/mysql
+
+[du_zds-data]
+user root
+env.directories {{ datadir }}/contents-private {{ datadir }}/contents-public {{ datadir }}/media {{ datadir }}/static
+env.prefix {{ datadir }}
+
+[du_zds-db]
+user root
+env.directories /var/lib/mysql/prod