Install custom Prometheus version

Co-authored-by: Joe William Murray Humphreys Banks <[email protected]>

5 files changed, 85 insertions, 2 deletions

diff --git a/ansible/host_vars/lovelace/prometheus.yml b/ansible/host_vars/lovelace/prometheus.yml
index cf748d0..cc35844 100644
--- a/ansible/host_vars/lovelace/prometheus.yml
+++ b/ansible/host_vars/lovelace/prometheus.yml
@@ -1,6 +1,6 @@
 ---
 
-prometheus_cmdline_options: " --web.config.file=/etc/prometheus/web_config.yml"
+prometheus_cmdline_options: " --web.config.file=/etc/prometheus/web_config.yml --config.file=/etc/prometheus/prometheus.yml --web.page-title='Python Discord Helper Monitoring And Supervision Service' --storage.tsdb.path='/var/lib/prometheus/metrics2/'"
 
 prometheus_web_configuration:
   tls_server_config:
diff --git a/ansible/roles/prometheus/defaults/main.yml b/ansible/roles/prometheus/defaults/main.yml
new file mode 100644
index 0000000..56a7cfd
--- /dev/null
+++ b/ansible/roles/prometheus/defaults/main.yml
@@ -0,0 +1,13 @@
+---
+prometheus_version: "2.52.0"
+prometheus_release_name: prometheus-{{ prometheus_version }}.linux-amd64
+prometheus_release_url: https://github.com/prometheus/prometheus/releases/download/v{{ prometheus_version }}/{{ prometheus_release_name }}.tar.gz
+prometheus_release_sha256sum_url: https://github.com/prometheus/prometheus/releases/download/v{{ prometheus_version }}/sha256sums.txt
+prometheus_base_directory: /opt/prometheus
+prometheus_installation_directory: "{{ prometheus_base_directory }}/versions"
+prometheus_tarball_name: "{{ prometheus_release_url | basename }}"
+prometheus_base_release_dest: "{{ prometheus_base_directory }}/sources"
+prometheus_release_tarball_dest: "{{ prometheus_base_release_dest }}/{{ prometheus_tarball_name }}"
+
+# web assets?
+# prometheus_cmdline_options: "--config.file=/etc/prometheus/prometheus.yml --web.page-title='Python Discord Helper Monitoring And Supervision Service'"
diff --git a/ansible/roles/prometheus/meta/main.yml b/ansible/roles/prometheus/meta/main.yml
new file mode 100644
index 0000000..56e9b53
--- /dev/null
+++ b/ansible/roles/prometheus/meta/main.yml
@@ -0,0 +1,3 @@
+---
+dependencies:
+  - systemd
diff --git a/ansible/roles/prometheus/tasks/main.yml b/ansible/roles/prometheus/tasks/main.yml
index c8ba53f..a024a2c 100644
--- a/ansible/roles/prometheus/tasks/main.yml
+++ b/ansible/roles/prometheus/tasks/main.yml
@@ -1,11 +1,45 @@
 ---
-- name: Install prometheus
+- name: Install prometheus package
   package:
     name: prometheus
     state: present
   tags:
     - role::prometheus
 
+- name: Create directories for Prometheus versions and tarballs
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    owner: root
+    group: prometheus
+    mode: "0750"
+  tags:
+    - role::prometheus
+  loop:
+    - "{{ prometheus_base_directory }}"
+    - "{{ prometheus_installation_directory }}"
+    - "{{ prometheus_base_release_dest }}"
+
+- name: Download Prometheus from GitHub
+  ansible.builtin.get_url:
+    url: "{{ prometheus_release_url }}"
+    checksum: sha256:{{ prometheus_release_sha256sum_url }}
+    dest: "{{ prometheus_release_tarball_dest }}"
+    owner: prometheus
+    group: prometheus
+  tags:
+    - role::prometheus
+
+- name: Uncompress Prometheus archive
+  ansible.builtin.unarchive:
+    src: "{{ prometheus_release_tarball_dest }}"
+    dest: "{{ prometheus_installation_directory }}"
+    owner: prometheus
+    group: prometheus
+    remote_src: true
+  tags:
+    - role::prometheus
+
 - name: Configure prometheus command line options
   lineinfile:
     path: /etc/default/prometheus
@@ -59,3 +93,30 @@
     - role::prometheus
   notify:
     - Reload the prometheus service
+
+- name: Create service override directory
+  ansible.builtin.file:
+    path: /etc/systemd/system/prometheus.service.d
+    state: directory
+    owner: root
+    group: root
+    mode: "0755"
+  tags:
+    - role::prometheus
+
+- name: Create service dropin
+  ansible.builtin.copy:
+    content: |
+      # Ansible managed
+      [Service]
+      ExecStart =
+      ExecStart = {{ prometheus_installation_directory }}/{{ prometheus_release_name }}/prometheus $ARGS
+    dest: /etc/systemd/system/prometheus.service.d/override.conf
+    owner: root
+    group: root
+    mode: "0444"
+  tags:
+    - role::prometheus
+  notify:
+    - Reload the systemd daemon
+    - Restart the prometheus service
diff --git a/ansible/roles/systemd/handlers/main.yml b/ansible/roles/systemd/handlers/main.yml
new file mode 100644
index 0000000..639db75
--- /dev/null
+++ b/ansible/roles/systemd/handlers/main.yml
@@ -0,0 +1,6 @@
+---
+- name: Reload the systemd daemon
+  systemd:
+    daemon_reload: true
+  tags:
+    - role::systemd