add script include example

sensu-plugin/scripts/ci_create.js

@@ -0,0 +1,170 @@
+/**
+ * ci_create.js
+ *
+ * Creates Service CIs and relationships based on metric metadata.
+ *
+ * Check input:
+ * [
+ *        {
+ *           'client':'...',
+ *           'agent_id':'...',
+ *           'check':{
+ *              'command':'...',
+ *              'name':'...',
+ *              'interval':60,
+ *              'timeout':60,
+ *              'output':'...see below. ... ',
+ *              'status':'..',
+ *           }
+ *        }
+ *     ]
+ *
+ * Example check output:
+ * lima-default.system.cpu.load.average.15m 0.33 1722967059
+ * lima-default.system.cpu.time;cpu=cpu0;state=system 8163.79 1722967059
+ * traces-service.graph.request.total;client=telemetrygen;connection_type=virtual_node;failed=false;server=telemetrygen-server 22 1722965304
+ */
+
+function parseLine(line) {
+  // Regular expression to capture metric name, labels, value, and timestamp
+  var regex = /^([^ ;]+)(;[^ ]+)? ([^ ]+) ([^ ]+)$/;
+  var match = line.match(regex);
+
+  if (match) {
+    var metricName = match[1];
+    var labelsString = match[2];
+    var value = match[3];
+    var timestamp = match[4];
+
+    // Parse labels into an object
+    var labels = {};
+    if (labelsString) {
+      // Remove leading semicolon and split the labels by semicolon
+      labelsString = labelsString.substring(1);
+      var labelsArray = labelsString.split(";");
+      labelsArray.forEach(function (label) {
+        var parts = label.split("=");
+        labels[parts[0]] = parts[1];
+      });
+    }
+
+    return {
+      metricName: metricName,
+      labels: labels,
+      value: value,
+      timestamp: timestamp,
+    };
+  }
+
+  return null;
+}
+
+function createServicePayloadItem(serviceName, metricName) {
+  return {
+    className: "cmdb_ci_service_discovered",
+    values: {
+      name: serviceName,
+      sys_class_name: "cmdb_ci_service_discovered",
+      short_description: "Created based on metric: " + metricName,
+    },
+  };
+}
+
+function processCheckOutput(output) {
+  var lines = output.split("\n");
+  var results = lines.map(parseLine);
+
+  var irePayload = {
+    items: [],
+    relations: [],
+  };
+
+  var foundServices = {};
+  var foundRelations = {};
+
+  function addPayloadItem(serviceName, metricName) {
+    if (foundServices[serviceName]) {
+      return;
+    }
+
+    irePayload.items.push(createServicePayloadItem(serviceName, metricName));
+    foundServices[serviceName] = true;
+  }
+
+  function addPayloadRelation(client, server) {
+    if (foundRelations[client + server]) {
+      return;
+    }
+
+    if (client == server) {
+      return;
+    }
+
+    var clientIndex = irePayload.items.findIndex(function (item) {
+      return item.values.name === client;
+    });
+    var serverIndex = irePayload.items.findIndex(function (item) {
+      return item.values.name === server;
+    });
+
+    if (clientIndex === -1 || serverIndex === -1) {
+      return;
+    }
+    irePayload.relations.push({
+      parent: clientIndex,
+      child: serverIndex,
+      type: "Depends on::Used by",
+    });
+    foundRelations[client + server] = true;
+  }
+
+  // Process each metric and create or update the CI if necessary
+  results.forEach(function (metric) {
+    if (!metric || !metric.labels) {
+      return;
+    }
+
+    if (metric.labels.client) {
+      addPayloadItem(metric.labels.client, metric.metricName);
+    }
+
+    if (metric.labels.server) {
+      addPayloadItem(metric.labels.server, metric.metricName);
+    }
+
+    if (metric.labels.client && metric.labels.server) {
+      addPayloadRelation(metric.labels.client, metric.labels.server);
+    }
+  });
+
+  gs.info(
+    "[OpenTelemetry Discovery] IRE payload: " + JSON.stringify(irePayload)
+  );
+  var result = sn_cmdb.IdentificationEngine.createOrUpdateCI(
+    "ServiceNow",
+    JSON.stringify(irePayload)
+  );
+  gs.info("[OpenTelemetry Discovery] IRE result: " + JSON.stringify(result));
+}
+
+// Uncomment for testing purposes
+// var checkResults = [
+//    {
+//        check: {
+//            output: "traces-service.graph.request.total;client=foo;connection_type=virtual_node;failed=false;server=bar-server 22 1722965304\ntraces-service.graph.request.total;client=foo;connection_type=virtual_node;failed=false;server=baz-server 22 1722965304"
+//        }
+//    }
+// ]
+
+gs.info("[OpenTelemetry Discovery] processing checks...");
+gs.info("" + JSON.stringify(checkResults));
+
+try {
+  for (var index = 0; index < checkResults.length; index++) {
+    var check = checkResults[index].check;
+    processCheckOutput(check.output);
+  }
+} catch (e) {
+  gs.error("[OpenTelemetry Discovery] Error processing checks: " + e);
+  gs.error(e.stack);
+}