diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 6fa14546..2382ac29 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -8,11 +8,11 @@
             alert: 'NodeFilesystemSpaceFillingUp',
             expr: |||
               (
-                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < %(fsSpaceFillingUpWarningThreshold)d
+                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} * 100 < %(fsSpaceFillingUpWarningThreshold)d
               and
-                predict_linear(node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s}[6h], 24*60*60) < 0
+                predict_linear(node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s}[6h], 24*60*60) < 0
               and
-                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
+                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
             'for': '1h',
@@ -28,11 +28,11 @@
             alert: 'NodeFilesystemSpaceFillingUp',
             expr: |||
               (
-                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < %(fsSpaceFillingUpCriticalThreshold)d
+                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} * 100 < %(fsSpaceFillingUpCriticalThreshold)d
               and
-                predict_linear(node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s}[6h], 4*60*60) < 0
+                predict_linear(node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s}[6h], 4*60*60) < 0
               and
-                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
+                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
             'for': '1h',
@@ -48,9 +48,9 @@
             alert: 'NodeFilesystemAlmostOutOfSpace',
             expr: |||
               (
-                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < %(fsSpaceAvailableWarningThreshold)d
+                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} * 100 < %(fsSpaceAvailableWarningThreshold)d
               and
-                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
+                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
             'for': '30m',
@@ -66,9 +66,9 @@
             alert: 'NodeFilesystemAlmostOutOfSpace',
             expr: |||
               (
-                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < %(fsSpaceAvailableCriticalThreshold)d
+                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} * 100 < %(fsSpaceAvailableCriticalThreshold)d
               and
-                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
+                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
             'for': '30m',
@@ -84,11 +84,11 @@
             alert: 'NodeFilesystemFilesFillingUp',
             expr: |||
               (
-                node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_files{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < 40
+                node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} / node_filesystem_files{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} * 100 < 40
               and
-                predict_linear(node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s}[6h], 24*60*60) < 0
+                predict_linear(node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s}[6h], 24*60*60) < 0
               and
-                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
+                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
             'for': '1h',
@@ -104,11 +104,11 @@
             alert: 'NodeFilesystemFilesFillingUp',
             expr: |||
               (
-                node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_files{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < 20
+                node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} / node_filesystem_files{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} * 100 < 20
               and
-                predict_linear(node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s}[6h], 4*60*60) < 0
+                predict_linear(node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s}[6h], 4*60*60) < 0
               and
-                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
+                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
             'for': '1h',
@@ -124,9 +124,9 @@
             alert: 'NodeFilesystemAlmostOutOfFiles',
             expr: |||
               (
-                node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_files{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < 5
+                node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} / node_filesystem_files{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} * 100 < 5
               and
-                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
+                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
             'for': '1h',
@@ -142,9 +142,9 @@
             alert: 'NodeFilesystemAlmostOutOfFiles',
             expr: |||
               (
-                node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_files{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < 3
+                node_filesystem_files_free{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} / node_filesystem_files{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} * 100 < 3
               and
-                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
+                node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
             'for': '1h',
diff --git a/docs/node-mixin/config.libsonnet b/docs/node-mixin/config.libsonnet
index f16796c4..86179c8f 100644
--- a/docs/node-mixin/config.libsonnet
+++ b/docs/node-mixin/config.libsonnet
@@ -16,6 +16,14 @@
     // alerting, you can exclude them here, e.g. 'fstype!="tmpfs"'.
     fsSelector: 'fstype!=""',
 
+    // Select the mountpoint for filesystem-related queries. If left
+    // empty, all mountpoints are selected. For example if you have a
+    // special purpose tmpfs instance that has a fixed size and will
+    // always be 100% full, but you still want alerts and dashboards for
+    // other tmpfs instances, you can exclude those by mountpoint prefix
+    // like so: 'mountpoint!~"/var/lib/foo.*"'.
+    fsMountpointSelector: 'mountpoint!=""',
+
     // Select the device for disk-related queries. If left empty, all
     // devices are selected. If you have unusual devices you don't
     // want to include in dashboards and alerting, you can exclude
diff --git a/docs/node-mixin/dashboards/use.libsonnet b/docs/node-mixin/dashboards/use.libsonnet
index 7b937b22..1602c134 100644
--- a/docs/node-mixin/dashboards/use.libsonnet
+++ b/docs/node-mixin/dashboards/use.libsonnet
@@ -307,12 +307,12 @@ local diskSpaceUtilisation =
                                  |||
                                    sum without (device) (
                                      max without (fstype, mountpoint) ((
-                                       node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s, %(clusterLabel)s="$cluster"}
+                                       node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s, %(fsMountpointSelector)s, %(clusterLabel)s="$cluster"}
                                        -
-                                       node_filesystem_avail_bytes{%(nodeExporterSelector)s, %(fsSelector)s, %(clusterLabel)s="$cluster"}
+                                       node_filesystem_avail_bytes{%(nodeExporterSelector)s, %(fsSelector)s, %(fsMountpointSelector)s, %(clusterLabel)s="$cluster"}
                                      ) != 0)
                                    )
-                                   / scalar(sum(max without (fstype, mountpoint) (node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s, %(clusterLabel)s="$cluster"})))
+                                   / scalar(sum(max without (fstype, mountpoint) (node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s, %(fsMountpointSelector)s, %(clusterLabel)s="$cluster"})))
                                  ||| % $._config, legendFormat='{{instance}}'
                                ))
                              )
@@ -453,10 +453,10 @@ local diskSpaceUtilisation =
                                    sum (
                                      sum without (device) (
                                        max without (fstype, mountpoint, instance, pod) ((
-                                         node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s} - node_filesystem_avail_bytes{%(nodeExporterSelector)s, %(fsSelector)s}
+                                         node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s, %(fsMountpointSelector)s) - node_filesystem_avail_bytes{%(nodeExporterSelector)s, %(fsSelector)s, %(fsMountpointSelector)s}
                                        ) != 0)
                                      )
-                                     / scalar(sum(max without (fstype, mountpoint) (node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s})))
+                                     / scalar(sum(max without (fstype, mountpoint) (node_filesystem_size_bytes{%(nodeExporterSelector)s, %(fsSelector)s, %(fsMountpointSelector)s})))
                                    ) by (%(clusterLabel)s)
                                  ||| % $._config, legendFormat='{{%(clusterLabel)s}}' % $._config
                                ))
diff --git a/docs/node-mixin/lib/prom-mixin.libsonnet b/docs/node-mixin/lib/prom-mixin.libsonnet
index 6b541ac3..6c4d9904 100644
--- a/docs/node-mixin/lib/prom-mixin.libsonnet
+++ b/docs/node-mixin/lib/prom-mixin.libsonnet
@@ -232,7 +232,7 @@ local table = grafana70.panel.table;
       .addThresholdStep(color='red', value=0.9)
       .addTarget(prometheus.target(
         |||
-          max by (mountpoint) (node_filesystem_size_bytes{%(nodeExporterSelector)s, instance="$instance", %(fsSelector)s})
+          max by (mountpoint) (node_filesystem_size_bytes{%(nodeExporterSelector)s, instance="$instance", %(fsSelector)s, %(fsMountpointSelector)s})
         ||| % config,
         legendFormat='',
         instant=true,
@@ -240,7 +240,7 @@ local table = grafana70.panel.table;
       ))
       .addTarget(prometheus.target(
         |||
-          max by (mountpoint) (node_filesystem_avail_bytes{%(nodeExporterSelector)s, instance="$instance", %(fsSelector)s})
+          max by (mountpoint) (node_filesystem_avail_bytes{%(nodeExporterSelector)s, instance="$instance", %(fsSelector)s, %(fsMountpointSelector)s})
         ||| % config,
         legendFormat='',
         instant=true,