Add metrics server for wakunode

waku/config.nim

@@ -62,6 +62,16 @@ type
       defaultValue: false
       name: "whisper-bridge" }: bool
 
+    wakuMode* {.
+      desc: "Select the Waku mode.",
+      defaultValue: WakuSan
+      name: "waku-mode" }: WakuMode
+
+    wakuPow* {.
+      desc: "PoW requirement of Waku node.",
+      defaultValue: 0.002
+      name: "waku-pow" }: float64
+
     nodekey* {.
       desc: "P2P node private key as hex.",
       defaultValue: newKeyPair()
@@ -88,19 +98,23 @@ type
       defaultValue: 8545
       name: "rpc-port" }: uint16
 
-    wakuMode* {.
-      desc: "Select the Waku mode.",
-      defaultValue: WakuSan
-      name: "waku-mode" }: WakuMode
+    metricsServer* {.
+      desc: "Enable the metrics server."
+      defaultValue: false
+      name: "metrics-server" }: bool
 
-    wakuPow* {.
-      desc: "PoW requirement of Waku node.",
-      defaultValue: 0.002
-      name: "waku-pow" }: float64
+    metricsServerAddress* {.
+      desc: "Listening address of the metrics server."
+      defaultValue: parseIpAddress("127.0.0.1")
+      name: "metrics-server-address" }: IpAddress
+
+    metricsServerPort* {.
+      desc: "Listening HTTP port of the metrics server."
+      defaultValue: 8008
+      name: "metrics-server-port" }: uint16
 
     # TODO:
     # - nat
-    # - metrics
     # - discv5 + topic register
     # - mailserver functionality
 

waku/wakunode.nim

@@ -1,5 +1,5 @@
 import
-  confutils, config, chronos, json_rpc/rpcserver,
+  confutils, config, chronos, json_rpc/rpcserver, metrics,
   chronicles/topics_registry, # TODO: What? Need this for setLoglevel, weird.
   eth/[keys, p2p, async_utils],
   eth/p2p/[discovery, enode, peer_pool, bootnodes, whispernodes],
@@ -73,6 +73,14 @@ proc run(config: WakuNodeConf) =
     setupWakuRPC(node, keys, rpcServer)
     rpcServer.start()
 
+  when defined(insecure):
+    if config.metricsServer:
+      let
+        address = config.metricsServerAddress
+        port = config.metricsServerPort + config.portsShift
+      info "Starting metrics HTTP server", address, port
+      metrics.startHttpServer($address, Port(port))
+
   runForever()
 
 when isMainModule: