diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 5ed86d38..d9dba413 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -48,7 +48,7 @@
             alert: 'NodeFilesystemAlmostOutOfSpace',
             expr: |||
               (
-                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < 5
+                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < %(fsSpaceAvailableCriticalThreshold)d
               and
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
               )
@@ -58,7 +58,7 @@
               severity: 'warning',
             },
             annotations: {
-              summary: 'Filesystem has less than 5% space left.',
+              summary: 'Filesystem has less than %(fsSpaceAvailableCriticalThreshold)d%% space left.' % $._config,
               description: 'Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left.',
             },
           },
@@ -66,7 +66,7 @@
             alert: 'NodeFilesystemAlmostOutOfSpace',
             expr: |||
               (
-                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < 3
+                node_filesystem_avail_bytes{%(nodeExporterSelector)s,%(fsSelector)s} / node_filesystem_size_bytes{%(nodeExporterSelector)s,%(fsSelector)s} * 100 < %(fsSpaceAvailableWarningThreshold)d
               and
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s} == 0
               )
@@ -76,7 +76,7 @@
               severity: '%(nodeCriticalSeverity)s' % $._config,
             },
             annotations: {
-              summary: 'Filesystem has less than 3% space left.',
+              summary: 'Filesystem has less than %(fsSpaceAvailableWarningThreshold)d%% space left.' % $._config,
               description: 'Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left.',
             },
           },
diff --git a/docs/node-mixin/config.libsonnet b/docs/node-mixin/config.libsonnet
index c06252cb..47e741ef 100644
--- a/docs/node-mixin/config.libsonnet
+++ b/docs/node-mixin/config.libsonnet
@@ -47,6 +47,11 @@
     fsSpaceFillingUpWarningThreshold: 40,
     fsSpaceFillingUpCriticalThreshold: 20,
 
+    // Available disk space (%) thresholds on which to trigger the
+    // 'NodeFilesystemAlmostOutOfSpace' alerts.
+    fsSpaceAvailableCriticalThreshold: 5,
+    fsSpaceAvailableWarningThreshold: 3,
+
     grafana_prefix: '',
   },
 }