Ansible role 'prometheus_install' for installing prometheus

Signed-off-by: CODING-Enthusiast9857 <madhavison06@gmail.com>

Author: CODING-Enthusiast9857

roles/prometheus_install/README.md

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+# Prometheus Ansible Role
+
+Highly-customizable Ansible role for installing, configuring, and verifying Prometheus on cluster nodes, enabling performance metrics collection.
+
+---
+
+## 🚀 Features
+
+- **Install Prometheus from tarball or latest release**
+- **Systemd service management for Prometheus**
+- **Modular role design: install, configure, verify**
+- **Support for offline and online deployment modes**
+
+---
+
+## 📦 Installation Methods
+
+- **Install from local `.tar.gz` file (offline mode)**
+- **Download and install from GitHub release (online mode)**
+
+---
+
+## 📋 Installation
+
+```
+$ ansible-playbook -i hosts playbook_prometheus.yml
+```

roles/prometheus_install/meta/main.yml

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+---
+galaxy_info:
+  author: IBM Corporation
+  description: Role to install Prometheus on cluster node
+  company: IBM
+
+  license: Apache-2.0
+
+  min_ansible_version: 2.9
+
+  platforms:
+    - name: EL
+      versions:
+        - 8
+        - 9
+
+  galaxy_tags: []
+
+dependencies: []

roles/prometheus_install/tasks/configure_prometheus.yml

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+---
+- name: Create /etc/prometheus directory
+  file:
+    path: /etc/prometheus
+    state: directory
+    owner: prometheus
+    group: prometheus
+    mode: "0755"
+
+- name: Copy prometheus configuration file
+  copy:
+    src: "{{ prometheus_install_dir }}/{{ prometheus_tarball | regex_replace('.tar.gz','') }}/prometheus.yml"
+    dest: /etc/prometheus/prometheus.yml
+    owner: prometheus
+    group: prometheus
+    mode: "0644"
+    remote_src: yes

roles/prometheus_install/tasks/create_user.yml

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+---
+- name: Create Prometheus user
+  user:
+    name: prometheus
+    shell: /sbin/nologin
+    system: yes
+    create_home: no

roles/prometheus_install/tasks/install.yml

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+---
+- name: Ensure Prometheus install directory exists
+  file:
+    path: "{{ prometheus_install_dir }}"
+    state: directory
+    mode: "0755"
+
+- name: Download Prometheus tarball
+  get_url:
+    url: "{{ prometheus_download_url }}"
+    dest: "{{ prometheus_local_tarball_path }}"
+    mode: "0644"
+
+- name: Extract Prometheus
+  unarchive:
+    src: "{{ prometheus_local_tarball_path }}"
+    dest: "{{ prometheus_install_dir }}"
+    remote_src: yes
+    creates: " {{ prometheus_install_dir }}/prometheus"

roles/prometheus_install/tasks/main.yml

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+---
+- import_tasks: install.yml
+  tags: install
+
+- import_tasks: create_user.yml
+  tags: createuser
+
+- import_tasks: symlink_binaries.yml
+  tags: symlink
+
+- import_tasks: configure_prometheus.yml
+  tags: configure

roles/prometheus_install/tasks/symlink_binaries.yml

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+---
+- name: Symlink Prometheus binaries
+  file:
+    src: "{{ prometheus_install_dir }}/{{ prometheus_tarball | regex_replace('.tar.gz','') }}/{{ item }}"
+    dest: "{{ prometheus_bin_dir }}/{{ item }}"
+    state: link
+    force: yes
+  loop:
+    - prometheus
+    - promtool

roles/prometheus_install/vars/main.yml

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+---
+prometheus_version: "3.7.0-rc.0"
+prometheus_tarball: "prometheus-{{ prometheus_version }}.linux-amd64.tar.gz"
+prometheus_download_url: "https://github.com/prometheus/prometheus/releases/download/v{{ prometheus_version }}/{{ prometheus_tarball }}"
+prometheus_local_tarball_path: "/tmp/{{ prometheus_tarball }}"
+prometheus_install_dir: "/opt/prometheus"
+prometheus_bin_dir: "/usr/local/bin"

samples/playbook_prometheus.yml

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+---
+- name: Install and configure Prometheus on cluster
+  hosts: all
+  become: true
+  
+  roles:
+    - prometheus_install