Fixed disk space on dash. Avail -> free.

metrics/grafana/dashboards/indexer-dash.json

@@ -310,6 +310,81 @@
             "title": "Repos fully indexed",
             "type": "stat"
         },
+        {
+            "datasource": {
+                "type": "prometheus",
+                "uid": "PBFA97CFB590B2093"
+            },
+            "description": "",
+            "fieldConfig": {
+                "defaults": {
+                    "color": {
+                        "mode": "thresholds"
+                    },
+                    "mappings": [],
+                    "thresholds": {
+                        "mode": "percentage",
+                        "steps": [
+                            {
+                                "color": "green",
+                                "value": null
+                            },
+                            {
+                                "color": "#EAB839",
+                                "value": 80
+                            },
+                            {
+                                "color": "dark-red",
+                                "value": 90
+                            }
+                        ]
+                    },
+                    "unit": "percent",
+                    "unitScale": true
+                },
+                "overrides": []
+            },
+            "gridPos": {
+                "h": 4,
+                "w": 4,
+                "x": 14,
+                "y": 0
+            },
+            "id": 15,
+            "links": [],
+            "options": {
+                "minVizHeight": 75,
+                "minVizWidth": 75,
+                "orientation": "auto",
+                "reduceOptions": {
+                    "calcs": [
+                        "lastNotNull"
+                    ],
+                    "fields": "",
+                    "values": false
+                },
+                "showThresholdLabels": false,
+                "showThresholdMarkers": true,
+                "sizing": "auto"
+            },
+            "pluginVersion": "10.3.3",
+            "targets": [
+                {
+                    "datasource": {
+                        "type": "prometheus",
+                        "uid": "PBFA97CFB590B2093"
+                    },
+                    "editorMode": "code",
+                    "expr": "100 * (node_filesystem_size_bytes{mountpoint='/4t'}-node_filesystem_free_bytes{mountpoint='/4t'})/(node_filesystem_size_bytes{mountpoint='/4t'})",
+                    "instant": false,
+                    "legendFormat": "__auto",
+                    "range": true,
+                    "refId": "A"
+                }
+            ],
+            "title": "Filesystem space usage",
+            "type": "gauge"
+        },
         {
             "datasource": {
                 "type": "prometheus",
@@ -335,8 +410,8 @@
             },
             "gridPos": {
                 "h": 4,
-                "w": 10,
+                "w": 6,
-                "x": 14,
+                "x": 18,
                 "y": 0
             },
             "id": 7,
@@ -365,7 +440,7 @@
                         "uid": "PBFA97CFB590B2093"
                     },
                     "editorMode": "code",
-                    "expr": "node_filesystem_size_bytes{mountpoint='/4t'}-node_filesystem_avail_bytes{mountpoint='/4t'}",
+                    "expr": "node_filesystem_size_bytes{mountpoint='/4t'}-node_filesystem_free_bytes{mountpoint='/4t'}",
                     "instant": false,
                     "legendFormat": "__auto",
                     "range": true,
@@ -1587,6 +1662,6 @@
     "timezone": "",
     "title": "Bluesky indexer",
     "uid": "aXw6dQhSz",
-    "version": 19,
+    "version": 20,
     "weekStart": ""
 }