feat: Add Prometheus installation role and playbook

- Created Prometheus role with automated installation
- Version: 2.48.1
- Configured remote_write to VictoriaMetrics (192.168.0.104:8428)
- Added scrape configs for monitoring infrastructure
- Created systemd service configuration
- Successfully tested on 192.168.0.105

roles/prometheus/defaults/main.yml

@@ -0,0 +1,32 @@
+---
+# Версия Prometheus
+prometheus_version: "2.48.1"
+prometheus_user: prometheus
+prometheus_group: prometheus
+
+# Директории
+prometheus_config_dir: /etc/prometheus
+prometheus_data_dir: /var/lib/prometheus
+prometheus_binary_dir: /usr/local/bin
+
+# Настройки сервиса
+prometheus_port: 9090
+prometheus_retention: "7d"
+prometheus_log_level: info
+
+# VictoriaMetrics для remote_write
+victoriametrics_host: "192.168.0.104"
+victoriametrics_port: 8428
+victoriametrics_url: "http://{{ victoriametrics_host }}:{{ victoriametrics_port }}/api/v1/write"
+
+# Vault для метрик
+vault_host: "192.168.0.103"
+vault_port: 8200
+vault_token: "root"
+
+# Git/Forgejo
+git_host: "192.168.0.100"
+git_port: 3000
+
+# Список хостов для node_exporter (будем добавлять позже)
+node_exporter_targets: []