From 14baee3d400b142031a2ce76ce1065a8089dc5d6 Mon Sep 17 00:00:00 2001
From: "jean-yves.fournier" <jean-yves.fournier@alterway.fr>
Date: Wed, 5 Jan 2022 15:44:39 +0100
Subject: [PATCH] add opcache

---
 defaults/main.yml                             |  2 +
 handlers/main.yml                             |  7 +++
 tasks/main.yml                                |  5 +++
 tasks/php-opcache_exporter.yml                | 44 +++++++++++++++++++
 .../conf/prometheus-php-opcache-exporter.j2   |  4 ++
 templates/conf/prometheus.yml.j2              | 12 +++++
 ...prometheus-php-opcache-exporter.service.j2 | 11 +++++
 7 files changed, 85 insertions(+)
 create mode 100644 tasks/php-opcache_exporter.yml
 create mode 100644 templates/conf/prometheus-php-opcache-exporter.j2
 create mode 100644 templates/systemd/prometheus-php-opcache-exporter.service.j2

diff --git a/defaults/main.yml b/defaults/main.yml
index 72a025c..131ce93 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -15,6 +15,8 @@ prometheus_mongodb_exporter_port: 27017
 prometheus_phpfpm_sockets_directory: "/run/php/"
 prometheus_phpfpm_sockets_directory_additional: "/var/run/php*.sock"
 
+prometheus_php-opcache_exporter_fcgi-uri: "unix:///var/run/php-000-default.sock"
+
 prometheus_postgres_exporter_systemd_user: "postgres"
 prometheus_postgres_exporter_host: "/var/run/postgresql/"
 prometheus_postgres_exporter_sslmode: "disable"
diff --git a/handlers/main.yml b/handlers/main.yml
index 431d005..a518a1d 100644
--- a/handlers/main.yml
+++ b/handlers/main.yml
@@ -40,6 +40,13 @@
     enabled: yes
   tags: ['prometheus']
 
+- name: 'prometheus | php-opcache exporter | restart service'
+  systemd:
+    name: prometheus-php-opcache-exporter.service
+    state: restarted
+    enabled: yes
+  tags: ['prometheus']
+
 - name: 'prometheus | apache exporter | restart service'
   systemd:
     name: prometheus-apache-exporter.service
diff --git a/tasks/main.yml b/tasks/main.yml
index f6b0af7..c23e7d3 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -35,6 +35,11 @@
   when:
     - "'phpfpm' in prometheus_exporter_packages"
 
+- name: 'prometheus | PHP opcache exporter'
+  include_tasks: 'php-opcache_exporter.yml'
+  when:
+    - "'php-opcache' in prometheus_exporter_packages"
+
 - name: 'prometheus | Apache exporter'
   include_tasks: 'apache_exporter.yml'
   when:
diff --git a/tasks/php-opcache_exporter.yml b/tasks/php-opcache_exporter.yml
new file mode 100644
index 0000000..83cf5db
--- /dev/null
+++ b/tasks/php-opcache_exporter.yml
@@ -0,0 +1,44 @@
+---
+- name: 'prometheus | php-opcache exporter | get latest release from GitHub'
+  shell: curl --silent "https://api.github.com/repos/MyOnlineStore/opcache-exporter/releases/latest" | jq -r .tag_name | sed "s/v//"
+  args:
+    warn: false
+  register: prometheus_php-opcache_exporter_latest_version
+  run_once: true
+
+- name: 'prometheus | php-opcache exporter | download'
+  get_url:
+    url: https://github.com/MyOnlineStore/opcache-exporter/releases/download/v{{ prometheus_php-opcache_exporter_version|default(prometheus_php-opcache_exporter_latest_version.stdout) }}/opcache_exporter-{{ prometheus_php-opcache_exporter_version|default(prometheus_php-opcache_exporter_latest_version.stdout) }}-linux-amd64
+    dest: /tmp
+
+- name: 'prometheus | php-opcache exporter | move to /usr/local/bin'
+  copy:
+    src: /tmp/opcache_exporter-{{ prometheus_php-opcache_exporter_version|default(prometheus_php-opcache_exporter_latest_version.stdout) }}-linux-amd64
+    dest: /usr/local/bin/prometheus-php-opcache-exporter
+    remote_src: yes
+    owner: root
+    group: root
+    mode: 0755
+
+- name: 'prometheus | php-opcache exporter | configuration'
+  template:
+    src: conf/prometheus-php-opcache-exporter.j2
+    dest: /etc/default/prometheus-php-opcache-exporter
+    owner: root
+    group: root
+    mode: 0600
+  register: prometheus_php-opcache_exporter_configuration
+
+- name: 'prometheus | php-opcache exporter | install unit file to systemd'
+  template:
+    src: systemd/prometheus-php-opcache-exporter.service.j2
+    dest: /etc/systemd/system/prometheus-php-opcache-exporter.service
+    owner: root
+    group: root
+    mode: 0600
+
+- name: 'prometheus | php-opcache exporter | configure systemd to use service'
+  systemd:
+    daemon_reload: yes
+    enabled: yes
+    name: prometheus-php-opcache-exporter.service
diff --git a/templates/conf/prometheus-php-opcache-exporter.j2 b/templates/conf/prometheus-php-opcache-exporter.j2
new file mode 100644
index 0000000..93babce
--- /dev/null
+++ b/templates/conf/prometheus-php-opcache-exporter.j2
@@ -0,0 +1,4 @@
+# {{ ansible_managed }}
+{% if (prometheus_php-opcache_exporter_fcgi-uri is defined) %}
+ARGS='"--opcache.fcgi-uri="{{ prometheus_php-opcache_exporter_fcgi-uri }}"'
+{% endif %}
diff --git a/templates/conf/prometheus.yml.j2 b/templates/conf/prometheus.yml.j2
index 13a3ce2..7b44a42 100644
--- a/templates/conf/prometheus.yml.j2
+++ b/templates/conf/prometheus.yml.j2
@@ -124,6 +124,18 @@ scrape_configs:
 {% endfor %}
 {% endif %}
 
+{% if prometheus_php-opcache_exporter_targets is defined %}
+  # PHP-FPM exporter #
+  - job_name: php-opcache
+    scrape_interval: 30s
+    scrape_timeout: 10s
+    static_configs:
+      - targets:
+{% for target in prometheus_php-opcache_exporter_targets %}
+        - {{ target }}:9101
+{% endfor %}
+{% endif %}
+
 {% if prometheus_apache_exporter_targets is defined %}
   # apache exporter #
   - job_name: apache
diff --git a/templates/systemd/prometheus-php-opcache-exporter.service.j2 b/templates/systemd/prometheus-php-opcache-exporter.service.j2
new file mode 100644
index 0000000..3e76aa2
--- /dev/null
+++ b/templates/systemd/prometheus-php-opcache-exporter.service.j2
@@ -0,0 +1,11 @@
+[Unit]
+Description=Prometheus PHP Opcache Exporter
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/prometheus-php-opcache-exporter
+EnvironmentFile=/etc/default/prometheus-php-opcache-exporter
+
+[Install]
+WantedBy=multi-user.target