From d2ecd350c47312cbf58840c953a9be68990d01e5 Mon Sep 17 00:00:00 2001
From: Matthew Fennell <matthew@fennell.dev>
Date: Wed, 9 Sep 2026 22:00:45 +0100
Subject: Copy munin-node tasks & handlers from xmpp-server

This is a straightforward copy and delete from the xmpp-server playbook for
now. Cleanup (for instance, adding a prefix to the variable names) will come
later.
---
 munin-node/handlers/main.yml |   6 +++
 munin-node/tasks/main.yml    | 126 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 132 insertions(+)

diff --git a/munin-node/handlers/main.yml b/munin-node/handlers/main.yml
index d8d22f9..2b69d03 100644
--- a/munin-node/handlers/main.yml
+++ b/munin-node/handlers/main.yml
@@ -3,3 +3,9 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
 ---
+
+- name: Restart munin-node
+  ansible.builtin.service:
+   name: munin-node
+   state: restarted
+  become: true
diff --git a/munin-node/tasks/main.yml b/munin-node/tasks/main.yml
index d8d22f9..342a3f7 100644
--- a/munin-node/tasks/main.yml
+++ b/munin-node/tasks/main.yml
@@ -3,3 +3,129 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
 ---
+
+- 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 munin-node tcp ports are open
+  community.general.ufw:
+   rule: allow
+   port: "{{ item }}"
+   proto: tcp
+   state: enabled
+  loop:
+   - 4949  # Munin
+  become: true
+
+- name: Ensure munin is configured
+  ansible.builtin.template:
+   src: "{{ playbook_dir }}/files/munin-node.conf.j2"
+   dest: /etc/munin/munin-node.conf
+   owner: root
+   group: root
+   mode: "0644"
+  become: true
+  notify: Restart munin-node
+
+- name: Ensure munin 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: apt_all
+     dest: apt_all
+   - src: cpu
+     dest: cpu
+   - src: df
+     dest: df
+   - src: df_abs
+     dest: df_abs
+   - src: df_inode
+     dest: df_inode
+   - src: diskstats
+     dest: diskstats
+   - src: entropy
+     dest: entropy
+   - src: forks
+     dest: forks
+   - src: fw_conntrack
+     dest: fw_conntrack
+   - src: fw_forwarded_local
+     dest: fw_forwarded_local
+   - src: fw_packets
+     dest: fw_packets
+   - src: if_
+     dest: if_enp1s0
+   - src: if_err_
+     dest: if_err_enp1s0
+   - src: irqstats
+     dest: irqstats
+   - src: load
+     dest: load
+   - src: memory
+     dest: memory
+   - src: netstat
+     dest: netstat
+   - src: open_files
+     dest: open_files
+   - src: open_inodes
+     dest: open_inodes
+   - src: postgres_autovacuum
+     dest: postgres_autovacuum
+   - src: postgres_bgwriter
+     dest: postgres_bgwriter
+   - src: postgres_cache_
+     dest: postgres_cache_prosody
+   - src: postgres_checkpoints
+     dest: postgres_checkpoints
+   - src: postgres_connections_
+     dest: postgres_connections_prosody
+   - src: postgres_connections_db
+     dest: postgres_connections_db
+   - src: postgres_locks_
+     dest: postgres_locks_prosody
+   - src: postgres_oldest_prepared_xact_
+     dest: postgres_oldest_prepared_xact_prosody
+   - src: postgres_prepared_xacts_
+     dest: postgres_prepared_xacts_prosody
+   - src: postgres_querylength_
+     dest: postgres_querylength_prosody
+   - src: postgres_scans_
+     dest: postgres_scans_prosody
+   - src: postgres_size_
+     dest: postgres_size_prosody
+   - src: postgres_streaming_
+     dest: postgres_streaming_prosody
+   - src: postgres_transactions_
+     dest: postgres_transactions_prosody
+   - src: postgres_tuples_
+     dest: postgres_tuples_prosody
+   - src: postgres_users
+     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
+  notify: Restart munin-node
-- 
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