From 311d6ce925f4ab5d2cdd116ff3e6f2ad0848019f Mon Sep 17 00:00:00 2001
From: Pijus Kamandulis <pkpjuklas@gmail.com>
Date: Thu, 30 May 2024 00:52:52 +0300
Subject: [PATCH] Configure prometheus node-exporter

---
 README.md                           |  3 +++
 ansible/05-vpn.yml                  |  3 ++-
 ansible/06-prometheus-exporters.yml | 19 +++++++++++++++++++
 3 files changed, 24 insertions(+), 1 deletion(-)
 create mode 100644 ansible/06-prometheus-exporters.yml

diff --git a/README.md b/README.md
index 10688e9..99541f5 100644
--- a/README.md
+++ b/README.md
@@ -70,6 +70,7 @@ mx1_fw:
     - name: wg0
       allowed_tcp:
         - 22 # SSH
+        - 9100 # Prometheus node exporter
 mx2_fw:
   interfaces:
     - name: vio0
@@ -83,6 +84,7 @@ mx2_fw:
     - name: wg0
       allowed_tcp:
         - 22 # SSH
+        - 9100 # Prometheus node exporter
 ```
 
 The hosts are taken from the `inventory.yml` file:
@@ -132,3 +134,4 @@ Current ansible playbooks:
 - 03-mail.yml - installs and configures dovecot and opensmtpd
 - 04-secondary-mail.yml - installs and configures opensmtpd as a backup mail receiver
 - 05-vpn.yml - configures wireguard vpn
+- 06-prometheus-exporters.yml - installs prometheus exporters
diff --git a/ansible/05-vpn.yml b/ansible/05-vpn.yml
index 721d4af..82190e7 100644
--- a/ansible/05-vpn.yml
+++ b/ansible/05-vpn.yml
@@ -24,6 +24,7 @@
         owner: root
         group: wheel
         mode: "0600"
+      register: wg_config
 
     - name: Create wireguard interface
       template:
@@ -33,4 +34,4 @@
 
     - name: Apply network configuration if changed
       shell: sh /etc/netstart {{ lookup('vars', inventory_hostname + '_wg').interface }}
-      when: iface_config.changed
+      when: wg_config.changed or iface_config.changed
diff --git a/ansible/06-prometheus-exporters.yml b/ansible/06-prometheus-exporters.yml
new file mode 100644
index 0000000..e2d7b9d
--- /dev/null
+++ b/ansible/06-prometheus-exporters.yml
@@ -0,0 +1,19 @@
+- name: VPN Setup
+  hosts:
+    - mx1
+    - mx2
+  remote_user: root
+  vars_files:
+    - vars.yml
+  tasks:
+    - name: Install node-exporter
+      community.general.openbsd_pkg:
+        name:
+          - node_exporter
+        state: present
+
+    - name: Enable and start node_exporter
+      service:
+        name: node_exporter
+        enabled: yes
+        state: started