ansible-taler-exchange

commit 3ae71b9a2830612dfc2d516523e8dbc56b4f4af1
parent 1247322e1f4416d35785357f62fc7dee7fb3652b
Author: Devan Carpenter <devan@taler.net>
Date:   Mon, 30 Dec 2024 03:31:41 +0000

monitoring: simplify monitoring role

use debian packages for exporters, and setup postgres-exporter with
debian default config file.

Diffstat:
A
roles/monitoring/files/etc/default/prometheus-postgres-exporter
 | 
13
+++++++++++++
M
roles/monitoring/handlers/main.yml
 | 
6
++++++
M
roles/monitoring/tasks/main.yml
 | 
53
++++++++++++++++++++++++++++-------------------------

3 files changed, 47 insertions(+), 25 deletions(-)
diff --git a/roles/monitoring/files/etc/default/prometheus-postgres-exporter b/roles/monitoring/files/etc/default/prometheus-postgres-exporter
@@ -0,0 +1,13 @@
+# Connection string for the PostgreSQL database. You need to either connect as
+# superuser, or create a user with enough rights, as described in
+# /usr/share/doc/prometheus-postgres-exporter/README.Debian
+
+# DATA_SOURCE_NAME='postgresql://login:password@hostname:port/'
+# DATA_SOURCE_NAME='user=prometheus host=/run/postgresql dbname=postgres'
+DATA_SOURCE_NAME='user=postgres host=/run/postgresql dbname=taler-exchange'
+
+# Set the command-line arguments to pass to the server.
+# Due to shell escaping, to pass backslashes for regexes, you need to double
+# them (\\d for \d). If running under systemd, you need to double them again
+# (\\\\d to mean \d), and escape newlines too.
+ARGS=""
diff --git a/roles/monitoring/handlers/main.yml b/roles/monitoring/handlers/main.yml
@@ -1,4 +1,10 @@
+---
 - name: restart nginx
   service:
     name: nginx
     state: restarted
+
+- name: restart postgres-exporter
+  service:
+    name: prometheus-postgres-exporter
+    state: restarted
diff --git a/roles/monitoring/tasks/main.yml b/roles/monitoring/tasks/main.yml
@@ -1,29 +1,11 @@
 ---
-- name: Deploy prometheus-nginx exporter
-  include_role:
-    name: prometheus.prometheus.nginx_exporter
-  vars:
-    nginx_exporter_web_listen_address: 127.0.0.1:9113
-
-- name: Deploy prometheus-node exporter
-  include_role:
-    name: prometheus.prometheus.node_exporter
-  vars:
-    node_exporter_web_listen_address: 127.0.0.1:9114
-
-- name: Deploy prometheus-postgres exporter
-  include_role:
-    name: prometheus.prometheus.postgres_exporter
-  vars:
-    postgres_exporter_web_listen_address: 127.0.0.1:9115
-    postgres_exporter_username: exporter
-    postgres_exporter_password: secret
-
-- name: Deploy prometheus-systemd exporter
-  include_role:
-    name: prometheus.prometheus.systemd_exporter
-  vars:
-    systemd_exporter_web_listen_address: 127.0.0.1:9116
+- name: Install prometheus exporters
+  apt:
+    name:
+      - prometheus-nginx-exporter
+      - prometheus-node-exporter
+      - prometheus-postgres-exporter
+    install_recommends: no
 
 - name: Ensure Taler monitoring virtualhost configuration file exists
   template:
@@ -32,6 +14,7 @@
     owner: root
     group: root
     mode: 0644
+  notify: restart nginx
 
 - name: Ensure Taler monitoring HTTP virtualhost configuration file exists
   template:
@@ -40,6 +23,7 @@
     owner: root
     group: root
     mode: 0644
+  notify: restart nginx
 
 - name: Enable Taler monitoring HTTP reverse proxy configuration
   file:
@@ -81,3 +65,22 @@
     dest: /etc/nginx/sites-enabled/monitoring-nginx.conf
     state: link
   notify: restart nginx
+
+- name: Configure postgres-exporter
+  copy:
+    src: etc/default/prometheus-postgres-exporter
+    dest: /etc/default/prometheus-postgres-exporter
+    owner: root
+    group: root
+    mode: 0644
+  notify: restart postgres-exporter
+
+- name: Ensure exporter services are enabled and started
+  service:
+    name: "{{item}}"
+    state: started
+    enabled: true
+  with_items:
+    - prometheus-node-exporter.service
+    - prometheus-nginx-exporter.service
+    - prometheus-postgres-exporter.service