ChristianLempa_Boilerplates/library/compose/prometheus/template.yaml

---
kind: compose
schema: "1.2"
metadata:
  icon:
    provider: selfh
    id: prometheus
  name: Prometheus
  description: |
    Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud.
    It is designed for reliability and scalability, making it suitable for monitoring dynamic cloud environments.
    Prometheus collects and stores metrics as time series data, providing powerful querying capabilities and integration with various visualization tools.
    ##  Swarm Deployment Warning
    Prometheus uses local TSDB storage and does NOT support running multiple replicas.
    This template enforces a single replica with node placement constraints. For true HA, consider remote storage solutions (Thanos, Cortex, VictoriaMetrics).

    Project: https://prometheus.io/

    Documentation: https://prometheus.io/docs/

    GitHub: https://github.com/prometheus/prometheus
  version: v3.7.3
  author: Christian Lempa
  date: '2025-10-31'
  tags:
    - traefik
    - swarm
    - authentik
  next_steps: |
    {% if swarm_enabled -%}
    1. Deploy to Docker Swarm:
       docker stack deploy -c compose.yaml {{ service_name }}
    2. Access Prometheus:
       {%- if traefik_enabled %} https://{{ traefik_host }}
       {%- else %} http://<swarm-node-ip>:{{ ports_http }}{%- endif %}
    {% else -%}
    1. Start Prometheus with Docker Compose:
       docker compose up -d
    2. Access Prometheus:
       {%- if traefik_enabled %} https://{{ traefik_host }}
       {%- else %} http://localhost:{{ ports_http }}{%- endif %}
    {% endif -%}
    3. Edit config/prometheus.yaml to add scrape targets
    4. Reload configuration: docker exec {{ container_name if not swarm_enabled else service_name }} kill -HUP 1
spec:
  general:
    vars:
      service_name:
        default: prometheus
  metrics:
    title: Metrics & Storage
    description: Configure data retention and storage settings
    vars:
      metrics_retention_time:
        type: str
        description: "How long to retain samples (e.g., 15d, 30d, 1y)"
        default: "15d"
        extra: "Older data will be deleted. Use 'h', 'd', 'w', 'y' for time units."
      metrics_retention_size:
        type: str
        description: "Maximum storage size (e.g., 5GB, 10GB, 1TB)"
        default: "0"
        extra: "Set to 0 for unlimited. Triggers deletion when exceeded."
      metrics_enable_remote_write:
        type: bool
        description: "Enable remote write receiver (allows pushing metrics via /api/v1/write)"
        default: false
        extra: "Caution: Intended for low-volume use cases only. Not efficient for general ingestion."
  ports:
    vars:
      ports_http:
        default: 9090

  traefik:
    vars:
      traefik_host:
        default: prometheus