add docker-compose/prometheus sample

docker-compose.yml

@@ -0,0 +1,19 @@
+version: "3.3"
+
+services:
+  exporter:
+    build: .
+    ports:
+      - 8888:8888
+    command: python3 -u /usr/src/process.py rtsp://ubnt:ubnt@10.8.0.124:554/live/ch00_0
+    restart: always
+
+  prometheus:
+    image: prom/prometheus:v2.17.1
+    volumes:
+      - ./prometheus.yml:/prometheus/prometheus.yml
+    command:
+      - '--config.file=/prometheus/prometheus.yml'
+    ports:
+      - 9090:9090
+    restart: always

process.py

@@ -8,6 +8,7 @@ from prometheus_client import start_http_server, Counter, Gauge
 
 cut_count = Counter('cut_count', 'Total number of jebnięcie')
 machine_on = Gauge('machine_on', 'Current machine engine status')
+stream_on = Gauge('stream_on', 'Current camera stream status')
 
 start_http_server(8888)
 
@@ -20,6 +21,7 @@ def dist(pos1, pos2):
 def run(path):
     gui = 'DISPLAY' in os.environ
 
+    stream_on.set(0)
     machine_on.set(0)
 
     # Create a VideoCapture object and read from input file
@@ -31,6 +33,7 @@ def run(path):
         raise Exception('VideoCapture not opened')
 
     print('Opened')
+    stream_on.set(1)
 
     spots = []
 
@@ -120,4 +123,5 @@ while True:
         run(sys.argv[1])
     except Exception as exc:
         print(exc)
+    stream_on.set(0)
     time.sleep(5.0)

prometheus.yml

@@ -0,0 +1,8 @@
+global:
+  scrape_interval: 15s
+  evaluation_interval: 15s
+
+scrape_configs:
+- job_name: sztancarka
+  static_configs:
+    - targets: ["exporter:8888"]