Add prometheus support

Readme.md

@@ -70,4 +70,10 @@ sudo systemctl status bme680-homekit
              └─1722 /usr/bin/python3 /home/pi/bme680-homekit/main.py
 
 Feb 21 20:10:30 raspberrypi systemd[1]: Started Bme680 Homekit service.
-```
+```
+
+### Prometheus
+
+Prometheus is a system for monitoring and alerting. To install it run `prometheus./install.sh`.
+
+Prometheus server will listen on port `:9090`

prometheus/install.sh

@@ -0,0 +1,9 @@
+wget https://github.com/prometheus/prometheus/releases/download/v2.36.1/prometheus-2.36.1.linux-armv6.tar.gz
+tar -xzvf prometheus-2.36.1.linux-armv6.tar.gz
+rm prometheus-2.36.1.linux-armv6.tar.gz
+
+cp prometheus.service /etc/systemd/system
+systemctl daemon-reload
+systemctl start prometheus
+systemctl enable prometheus
+

prometheus/prometheus.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Prometheus Server
+Documentation=https://prometheus.io/docs/introduction/overview/
+After=network-online.target
+
+[Service]
+Restart=on-failure
+RestartSec=5s
+User=pi
+Restart=on-failure
+
+ExecStart=/home/pi/bme680-homekit/prometheus/prometheus-2.36.1.linux-armv6/prometheus \
+  --config.file=/home/pi/bme680-homekit/prometheus/prometheus.yml \
+  --storage.tsdb.path=/home/pi/bme680-homekit/prometheus/data
+
+[Install]
+WantedBy=multi-user.target

prometheus/prometheus.yml

@@ -0,0 +1,34 @@
+# my global config
+global:
+  scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
+  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
+  # scrape_timeout is set to the global default (10s).
+
+# Alertmanager configuration
+alerting:
+  alertmanagers:
+    - static_configs:
+        - targets:
+          # - alertmanager:9093
+
+# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
+rule_files:
+  # - "first_rules.yml"
+  # - "second_rules.yml"
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: "prometheus"
+
+    # metrics_path defaults to '/metrics'
+    # scheme defaults to 'http'.
+
+    static_configs:
+      - targets: ["localhost:9090"]
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: "sensors"
+    metrics_path: "/"
+    static_configs:
+      - targets: ["localhost:8000"]