feat: add start indicator (#175)

mojaloop · Nov 29, 2024 · 2344b03 · 2344b03
1 parent d3146e1
commit 2344b03
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Showing 3 changed files with 31 additions and 26 deletions.
diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -62,8 +62,8 @@
   },
   "devDependencies": {
     "@hapi/hapi": "^21.3.12",
-    "@types/node": "^22.9.3",
-    "@types/tape": "^5.6.4",
+    "@types/node": "^22.10.1",
+    "@types/tape": "^5.6.5",
     "audit-ci": "^7.1.0",
     "debug": "4.3.7",
     "joi": "^17.13.3",

diff --git a/src/metrics.ts b/src/metrics.ts
@@ -217,6 +217,13 @@ class Metrics {
         labelNames: ['method']
       })
 
+      new client.Gauge({
+        registers: [this.getDefaultRegister()],
+        name: 'http_server_start',
+        help: 'Start indicator for the server'
+      }).inc()
+      let first = true
+
       server.ext('onRequest', (request, h) => {
         const { maxConnections = 0, maxRequestsPending = 0 } = this.getOptions()
         if ((maxConnections > 0 || maxRequestsPending > 0) && request.path === '/health') {
@@ -266,7 +273,12 @@ class Metrics {
         method: 'GET',
         path: '/metrics',
         handler: async (request, h) => {
-          return h.response(await this.getMetricsForPrometheus()).code(200).type('text/plain; version=0.0.4')
+          const metrics = await this.getMetricsForPrometheus()
+          if (first) {
+            this.getDefaultRegister().removeSingleMetric('http_server_start')
+            first = false
+          }
+          return h.response(metrics).code(200).type('text/plain; version=0.0.4')
         },
         options: {
           tags: ['api', 'metrics'],