From 57ba61256ce7568a52d4e5c266b5914f28462cd7 Mon Sep 17 00:00:00 2001
From: Erich Blume <blume.erich@gmail.com>
Date: Sun, 18 Jan 2026 12:05:09 -0800
Subject: [PATCH] Fix zot dashboard: correct latency metric, replace memory
 with storage

- Use zot_http_method_latency_seconds_bucket (not zot_http_request_duration_*)
- Replace Memory Usage stat with Total Storage
- Replace Memory Over Time with Storage by Repository

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 .../roles/grafana/files/dashboards/zot.json   | 28 ++++++-------------
 1 file changed, 8 insertions(+), 20 deletions(-)

diff --git a/ansible/roles/grafana/files/dashboards/zot.json b/ansible/roles/grafana/files/dashboards/zot.json
index dab1876..41c99a8 100644
--- a/ansible/roles/grafana/files/dashboards/zot.json
+++ b/ansible/roles/grafana/files/dashboards/zot.json
@@ -153,11 +153,11 @@
       "targets": [
         {
           "datasource": { "type": "prometheus", "uid": "prometheus" },
-          "expr": "process_resident_memory_bytes{job=\"prometheus.scrape.zot\"}",
+          "expr": "sum(zot_repo_storage_bytes)",
           "refId": "A"
         }
       ],
-      "title": "Memory Usage",
+      "title": "Total Storage",
       "type": "stat"
     },
     {
@@ -385,19 +385,19 @@
       "targets": [
         {
           "datasource": { "type": "prometheus", "uid": "prometheus" },
-          "expr": "histogram_quantile(0.50, sum(rate(zot_http_request_duration_seconds_bucket{job=\"prometheus.scrape.zot\"}[5m])) by (le))",
+          "expr": "histogram_quantile(0.50, sum(rate(zot_http_method_latency_seconds_bucket{job=\"prometheus.scrape.zot\"}[5m])) by (le))",
           "legendFormat": "p50",
           "refId": "A"
         },
         {
           "datasource": { "type": "prometheus", "uid": "prometheus" },
-          "expr": "histogram_quantile(0.95, sum(rate(zot_http_request_duration_seconds_bucket{job=\"prometheus.scrape.zot\"}[5m])) by (le))",
+          "expr": "histogram_quantile(0.95, sum(rate(zot_http_method_latency_seconds_bucket{job=\"prometheus.scrape.zot\"}[5m])) by (le))",
           "legendFormat": "p95",
           "refId": "B"
         },
         {
           "datasource": { "type": "prometheus", "uid": "prometheus" },
-          "expr": "histogram_quantile(0.99, sum(rate(zot_http_request_duration_seconds_bucket{job=\"prometheus.scrape.zot\"}[5m])) by (le))",
+          "expr": "histogram_quantile(0.99, sum(rate(zot_http_method_latency_seconds_bucket{job=\"prometheus.scrape.zot\"}[5m])) by (le))",
           "legendFormat": "p99",
           "refId": "C"
         }
@@ -460,24 +460,12 @@
       "targets": [
         {
           "datasource": { "type": "prometheus", "uid": "prometheus" },
-          "expr": "process_resident_memory_bytes{job=\"prometheus.scrape.zot\"}",
-          "legendFormat": "Resident Memory",
+          "expr": "zot_repo_storage_bytes",
+          "legendFormat": "{{repo}}",
           "refId": "A"
-        },
-        {
-          "datasource": { "type": "prometheus", "uid": "prometheus" },
-          "expr": "go_memstats_heap_alloc_bytes{job=\"prometheus.scrape.zot\"}",
-          "legendFormat": "Heap Alloc",
-          "refId": "B"
-        },
-        {
-          "datasource": { "type": "prometheus", "uid": "prometheus" },
-          "expr": "go_memstats_heap_inuse_bytes{job=\"prometheus.scrape.zot\"}",
-          "legendFormat": "Heap In Use",
-          "refId": "C"
         }
       ],
-      "title": "Memory Over Time",
+      "title": "Storage by Repository",
       "type": "timeseries"
     }
   ],