Add exporter.py

exporter.py

@@ -0,0 +1,34 @@
+ import time
+  import docker
+  from prometheus_client import start_http_server, Gauge
+
+  client = docker.from_env()
+
+  cpu_gauge = Gauge("container_cpu_percent", "CPU usage %", ["name"])
+  mem_gauge = Gauge("container_mem_bytes", "Memory usage bytes", ["name"])
+  net_rx_gauge = Gauge("container_net_rx_bytes", "Network RX bytes", ["name"])
+  net_tx_gauge = Gauge("container_net_tx_bytes", "Network TX bytes", ["name"])
+
+  def calc_cpu(stats):
+      cd = stats["cpu_stats"]["cpu_usage"]["total_usage"] - stats["precpu_stats"]["cpu_usage"]["total_usage"]
+      sd = stats["cpu_stats"]["system_cpu_usage"] - stats["precpu_stats"]["system_cpu_usage"]
+      cpus = stats["cpu_stats"].get("online_cpus", 1)
+      return (cd / sd) * cpus * 100 if sd > 0 else 0
+
+  def collect():
+      for c in client.containers.list():
+          stats = c.stats(stream=False)
+          name = c.name
+          cpu_gauge.labels(name).set(calc_cpu(stats))
+          mem_gauge.labels(name).set(stats["memory_stats"].get("usage", 0))
+          net = stats.get("networks", {})
+          rx = sum(v["rx_bytes"] for v in net.values())
+          tx = sum(v["tx_bytes"] for v in net.values())
+          net_rx_gauge.labels(name).set(rx)
+          net_tx_gauge.labels(name).set(tx)
+
+  start_http_server(9338)
+  while True:
+      collect()
+      time.sleep(15)
+