From eb726d710784bb1676042f3fe2f1b5b0bb47cb81 Mon Sep 17 00:00:00 2001
From: Matthew Fennell <matthew@fennell.dev>
Date: Wed, 9 Sep 2026 22:54:41 +0100
Subject: Don't install prosody plugins by default

I want to set up monitoring on fennell.dev and search.fennell.dev - neither of
which have a postgres instance or should include other prosody-related plugins
in the future. Therefore, configure a base set of plugins that should always be
included, and let extra plugins / configuration be driven by extra_profiles.

Over time, I'll want to create profile maps (containing config for the
necessary packages/plugins to install/configure for that profile) to avoid
unnecessary duplication of tasks, but for now, it's sufficient.
---
 munin-node/tasks/main.yml | 52 ++++++++++++++++++++++++++++++++---------------
 1 file changed, 36 insertions(+), 16 deletions(-)

(limited to 'munin-node/tasks')

diff --git a/munin-node/tasks/main.yml b/munin-node/tasks/main.yml
index dde9572..f068eb5 100644
--- a/munin-node/tasks/main.yml
+++ b/munin-node/tasks/main.yml
@@ -7,12 +7,20 @@
 - name: Ensure required packages are installed
   ansible.builtin.apt:
    name:
-    - libdbi-perl  # Used by munin postgres plugins
     - munin-node  # Graphs and monitoring
    state: present
    update_cache: true
   become: true
 
+- name: Ensure prosody packages are installed
+  ansible.builtin.apt:
+   name:
+    - libdbi-perl  # Used by munin postgres plugins
+   state: present
+   update_cache: true
+  when: "'prosody' in extra_profiles"
+  become: true
+
 - name: Ensure munin-node tcp ports are open
   community.general.ufw:
    rule: allow
@@ -33,7 +41,7 @@
   become: true
   notify: Restart munin-node
 
-- name: Ensure munin plugins are configured
+- name: Ensure default plugins are configured
   ansible.builtin.file:
    src: "/usr/share/munin/plugins/{{ item.src }}"
    dest: "/etc/munin/plugins/{{ item.dest }}"
@@ -80,6 +88,31 @@
      dest: open_files
    - src: open_inodes
      dest: open_inodes
+   - src: proc_pri
+     dest: proc_pri
+   - src: processes
+     dest: processes
+   - src: swap
+     dest: swap
+   - src: threads
+     dest: threads
+   - src: uptime
+     dest: uptime
+   - src: users
+     dest: users
+   - src: vmstat
+     dest: vmstat
+  notify: Restart munin-node
+
+- name: Ensure prosody plugins are configured
+  ansible.builtin.file:
+   src: "/usr/share/munin/plugins/{{ item.src }}"
+   dest: "/etc/munin/plugins/{{ item.dest }}"
+   owner: root
+   group: root
+   state: link
+  become: true
+  with_items:
    - src: postgres_autovacuum
      dest: postgres_autovacuum
    - src: postgres_bgwriter
@@ -114,18 +147,5 @@
      dest: postgres_users
    - src: postgres_xlog
      dest: postgres_xlog
-   - src: proc_pri
-     dest: proc_pri
-   - src: processes
-     dest: processes
-   - src: swap
-     dest: swap
-   - src: threads
-     dest: threads
-   - src: uptime
-     dest: uptime
-   - src: users
-     dest: users
-   - src: vmstat
-     dest: vmstat
+  when: "'prosody' in extra_profiles"
   notify: Restart munin-node
-- 
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