update prometheus

technology/applications/web/Prometheus.md

@@ -2,7 +2,57 @@
 obj: application
 website: https://prometheus.io
 repo: https://github.com/prometheus/prometheus
+rev: 2024-12-12
 ---
 
 # Prometheus
-#wip
+Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud.
+It collects and stores its metrics as time series data, i.e. metrics information is stored with the timestamp at which it was recorded, alongside optional key-value pairs called labels.
+This data can then be visualized using [Grafana](./Grafana.md).
+
+## Docker Compose
+
+```yml
+services:
+    prometheus:
+        image: prom/prometheus
+        ports:
+            - 9090:9090
+        volumes:
+            - ./data:/prometheus
+            - ./conf:/etc/prometheus
+```
+
+## Configuration
+Basic prometheus config:
+
+```yml
+global:
+  scrape_interval: 15s 
+  evaluation_interval: 15s 
+
+scrape_configs:
+  - job_name: "prometheus"
+    static_configs:
+      - targets: ["localhost:9090"]
+
+    # Node Exporter Config
+  - job_name: node_exporter
+    scrape_interval: 5s
+    static_configs:
+      - targets: ['host:9100']
+
+    # Job with custom CA
+  - job_name: custom_ca
+    static_configs:
+      - targets: ['endpoint']
+    tls_config:
+      ca_file: '/ca_file.crt'
+
+    # Job with Bearer Auth
+  - job_name: bearer_auth
+    scrape_interval: 120s
+    static_configs:
+      - targets: ['endpoint']
+    bearer_token: 'BEARER_TOKEN'
+```