Merge pull request #86 from PMudra/change-mountpoint

Change target mountpoint of disk space query

README.md

@@ -334,7 +334,7 @@ Alerts when a node storage usage goes over 85% for five minutes.
 
 ```
 ALERT node_disk_usage
-  IF ((node_filesystem_size{mountpoint="/"} - node_filesystem_free{mountpoint="/"}) * 100 / node_filesystem_size{mountpoint="/"}) * on(instance) group_left(node_name) node_meta > 85
+  IF ((node_filesystem_size{mountpoint="/rootfs"} - node_filesystem_free{mountpoint="/rootfs"}) * 100 / node_filesystem_size{mountpoint="/rootfs"}) * on(instance) group_left(node_name) node_meta > 85
   FOR 5m
   LABELS      { severity="warning" }
   ANNOTATIONS {
@@ -349,7 +349,7 @@ Alerts when a node storage is going to remain out of free space in six hours.
 
 ```
 ALERT node_disk_fill_rate_6h
-  IF predict_linear(node_filesystem_free{mountpoint="/"}[1h], 6*3600) * on(instance) group_left(node_name) node_meta < 0
+  IF predict_linear(node_filesystem_free{mountpoint="/rootfs"}[1h], 6*3600) * on(instance) group_left(node_name) node_meta < 0
   FOR 1h
   LABELS      { severity="critical" }
   ANNOTATIONS {

grafana/dashboards/swarmprom-nodes-dash.json

@@ -764,7 +764,7 @@
       "tableColumn": "",
       "targets": [
         {
-          "expr": "sum(node_filesystem_size_bytes{mountpoint=\"/\"} * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"})",
+          "expr": "sum(node_filesystem_size_bytes{mountpoint=\"/rootfs\"} * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"})",
           "format": "time_series",
           "intervalFactor": 2,
           "legendFormat": "",
@@ -848,7 +848,7 @@
       "tableColumn": "",
       "targets": [
         {
-          "expr": "sum((node_filesystem_free_bytes{mountpoint=\"/\"} / node_filesystem_size_bytes{mountpoint=\"/\"}) * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"} * 100) / count(node_meta * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"})",
+          "expr": "sum((node_filesystem_free_bytes{mountpoint=\"/rootfs\"} / node_filesystem_size_bytes{mountpoint=\"/rootfs\"}) * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"} * 100) / count(node_meta * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"})",
           "format": "time_series",
           "intervalFactor": 2,
           "legendFormat": "",

grafana/dashboards/swarmprom-services-dash.json

@@ -1479,7 +1479,7 @@
       "tableColumn": "",
       "targets": [
         {
-          "expr": "sum((node_filesystem_free_bytes{mountpoint=\"/\"} / node_filesystem_size_bytes{mountpoint=\"/\"}) * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"} * 100) / count(node_meta * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"})",
+          "expr": "sum((node_filesystem_free_bytes{mountpoint=\"/rootfs\"} / node_filesystem_size_bytes{mountpoint=\"/rootfs\"}) * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"} * 100) / count(node_meta * on(instance) group_left(node_name) node_meta{node_id=~\"$node_id\"})",
           "format": "time_series",
           "intervalFactor": 2,
           "legendFormat": "",

prometheus/rules/swarm_node.rules.yml

@@ -22,8 +22,8 @@ groups:
         $value}}%.
       summary: Memory alert for Swarm node '{{ $labels.node_name }}'
   - alert: node_disk_usage
-    expr: ((node_filesystem_size_bytes{mountpoint="/"} - node_filesystem_free_bytes{mountpoint="/"})
-      * 100 / node_filesystem_size_bytes{mountpoint="/"}) * ON(instance) GROUP_LEFT(node_name)
+    expr: ((node_filesystem_size_bytes{mountpoint="/rootfs"} - node_filesystem_free_bytes{mountpoint="/rootfs"})
+      * 100 / node_filesystem_size_bytes{mountpoint="/rootfs"}) * ON(instance) GROUP_LEFT(node_name)
       node_meta > 85
     for: 1m
     labels:
@@ -33,7 +33,7 @@ groups:
         $value}}%.
       summary: Disk alert for Swarm node '{{ $labels.node_name }}'
   - alert: node_disk_fill_rate_6h
-    expr: predict_linear(node_filesystem_free_bytes{mountpoint="/"}[1h], 6 * 3600) * ON(instance)
+    expr: predict_linear(node_filesystem_free_bytes{mountpoint="/rootfs"}[1h], 6 * 3600) * ON(instance)
       GROUP_LEFT(node_name) node_meta < 0
     for: 1h
     labels: