some code for checks we want to run on SG

gateway/check-ip-address.js

@@ -0,0 +1,21 @@
+#!/usr/bin/env node
+
+// Get IP address
+function get_ip_addresses () {
+	var os = require('os');
+	var ifaces = os.networkInterfaces();
+
+	var out = [];
+
+	for (var ifname in ifaces) {
+		if (ifname != lo) {
+			out.push(ifaces[ifname].address);
+		}
+	}
+	return out.join('|');
+}
+
+var addresses = get_ip_addresses();
+
+console.log(addresses);
+process.exit(0);

gateway/package.json

@@ -17,6 +17,7 @@
   },
   "homepage": "https://github.com/lab11/gateway-tools#readme",
   "dependencies": {
+    "getmac": "^1.0.7",
     "mqtt-discover": "^0.1.1"
   }
 }

gateway/sensu-configure-client.js

@@ -0,0 +1,37 @@
+#!/usr/bin/env node
+
+var getmac = require('getmac');
+var exec   = require('child_process').exec;
+var fs     = require('fs');
+
+var CONFIG_FILENAME     = '/etc/sensu/conf.d/client.json';
+
+var output = JSON.parse(fs.readFileSync(CONFIG_FILENAME));
+
+// Get IP address
+function get_first_ip_address () {
+	var os = require('os');
+	var ifaces = os.networkInterfaces();
+
+	for (var ifname in ifaces) {
+		if (ifname != lo) {
+			return ifaces[ifname].address;
+		}
+	}
+	return '';
+}
+
+if ('client' in output) {
+	getmac.getMac(function (err, addr) {
+		var name = 'swarm-gateway-' + addr;
+
+		output['client']['name'] = name;
+		output['client']['address'] = get_first_ip_address();
+
+		fs.writeFileSync(CONFIG_FILENAME, JSON.stringify(output));
+
+        exec(RESTART_SENSU_CMD, function (err, stdout, stderr) {
+            process.exit(0);
+        });
+	});
+}

sensu-server-config/swarm-gateway-ip-check.json

@@ -0,0 +1,11 @@
+{
+	"checks": {
+		"gateway-check-ipaddress": {
+			"command": "/home/debian/gateway-tools/gateway/check-ip-address.js",
+			"subscribers": [
+				"swarm-gateway"
+			],
+			"interval": 300
+		}
+	}
+}