From fc967aa992c8f77d1a3d786e0954428ba62160f2 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <zhuravlev.vitaly@gmail.com>
Date: Tue, 28 Mar 2023 01:26:42 +0800
Subject: [PATCH 01/19] Add mountpoint to NodeFilesystem alerts

This helps to identify alerting filesystem.

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index f92d97df..6c215949 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -21,7 +21,7 @@
             },
             annotations: {
               summary: 'Filesystem is predicted to run out of space within the next 24 hours.',
-              description: 'Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left and is filling up.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left and is filling up.',
             },
           },
           {
@@ -41,7 +41,7 @@
             },
             annotations: {
               summary: 'Filesystem is predicted to run out of space within the next 4 hours.',
-              description: 'Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left and is filling up fast.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left and is filling up fast.',
             },
           },
           {
@@ -59,7 +59,7 @@
             },
             annotations: {
               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.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left.',
             },
           },
           {
@@ -77,7 +77,7 @@
             },
             annotations: {
               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.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left.',
             },
           },
           {
@@ -97,7 +97,7 @@
             },
             annotations: {
               summary: 'Filesystem is predicted to run out of inodes within the next 24 hours.',
-              description: 'Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left and is filling up.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left and is filling up.',
             },
           },
           {
@@ -117,7 +117,7 @@
             },
             annotations: {
               summary: 'Filesystem is predicted to run out of inodes within the next 4 hours.',
-              description: 'Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left and is filling up fast.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left and is filling up fast.',
             },
           },
           {
@@ -135,7 +135,7 @@
             },
             annotations: {
               summary: 'Filesystem has less than 5% inodes left.',
-              description: 'Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left.',
             },
           },
           {
@@ -153,7 +153,7 @@
             },
             annotations: {
               summary: 'Filesystem has less than 3% inodes left.',
-              description: 'Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left.',
             },
           },
           {

From 0e0399d41ef56022f13b13c76991c195fc64f826 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <zhuravlev.vitaly@gmail.com>
Date: Tue, 28 Mar 2023 01:43:53 +0800
Subject: [PATCH 02/19] Decrease NodeFilesystem pending time to 15m

30m is too long and there is a risk of running out of disk space/inodes completely if something is filling up disk very fast (like log file).

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 6c215949..e8eba089 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -53,7 +53,7 @@
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
-            'for': '30m',
+            'for': '15m',
             labels: {
               severity: 'warning',
             },
@@ -71,7 +71,7 @@
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
-            'for': '30m',
+            'for': '15m',
             labels: {
               severity: '%(nodeCriticalSeverity)s' % $._config,
             },
@@ -129,7 +129,7 @@
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
-            'for': '1h',
+            'for': '15m',
             labels: {
               severity: 'warning',
             },
@@ -147,7 +147,7 @@
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
-            'for': '1h',
+            'for': '15m',
             labels: {
               severity: '%(nodeCriticalSeverity)s' % $._config,
             },

From fd2d62af63fa493001b858ab8aa5860591b33fe7 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <zhuravlev.vitaly@gmail.com>
Date: Tue, 28 Mar 2023 02:57:02 +0800
Subject: [PATCH 03/19] Add CPU and memory alerts

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 28 +++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index e8eba089..4f732058 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -309,6 +309,34 @@
               description: 'File descriptors limit at {{ $labels.instance }} is currently at {{ printf "%.2f" $value }}%.',
             },
           },
+          {
+            alert: 'NodeCPUHighUsage',
+            expr: |||
+              sum without(mode) (avg without (cpu) (rate(node_cpu_seconds_total{%(nodeExporterSelector)s, mode!="idle"}[2m]))) > 0.8
+            ||| % $._config,
+            'for': '15m',
+            labels: {
+              severity: 'warning',
+            },
+            annotations: {
+              summary: 'High CPU usage.',
+              description: 'CPU usage on {{ $labels.instance }} has been above 80% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
+            },
+          },
+          {
+            alert: 'NodeMemoryHighUtilization',
+            expr: |||
+              100 - node_memory_MemAvailable_bytes{%(nodeExporterSelector)s} / node_memory_MemTotal_bytes{%(nodeExporterSelector)s} * 100 < 10
+            ||| % $._config,
+            'for': '15m',
+            labels: {
+              severity: 'warning',
+            },
+            annotations: {
+              summary: 'Host is running out of memory',
+              description: 'Memory is filling up on {{ $labels.instance }}, has been above 90% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
+            },
+          },
         ],
       },
     ],

From 74794182a7a9cb736afd5b3e41dcb96258ab51f1 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <zhuravlev.vitaly@gmail.com>
Date: Tue, 28 Mar 2023 03:35:41 +0800
Subject: [PATCH 04/19] Add failed systemd service alert

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 4f732058..c1f98c9c 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -337,6 +337,20 @@
               description: 'Memory is filling up on {{ $labels.instance }}, has been above 90% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
             },
           },
+          {
+            alert: 'NodeSystemdServiceFailed',
+            expr: |||
+              node_systemd_unit_state{%(nodeExporterSelector)s, state="failed"} == 1
+            ||| % $._config,
+            'for': '5m',
+            labels: {
+              severity: 'critical',
+            },
+            annotations: {
+              summary: 'Systemd service has entered failed state.',
+              description: 'Systemd service {{ $labels.name }} has entered failed state on {{ $labels.instance }}',
+            },
+          },
         ],
       },
     ],

From 3d8075da7dc86b4b5d1dd43ff886b13c1d4006ab Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <zhuravlev.vitaly@gmail.com>
Date: Tue, 28 Mar 2023 04:22:14 +0800
Subject: [PATCH 05/19] Decrease NodeNetwork*Errs pending period

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index c1f98c9c..03eebc33 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -161,7 +161,7 @@
             expr: |||
               rate(node_network_receive_errs_total[2m]) / rate(node_network_receive_packets_total[2m]) > 0.01
             ||| % $._config,
-            'for': '1h',
+            'for': '15m',
             labels: {
               severity: 'warning',
             },
@@ -175,7 +175,7 @@
             expr: |||
               rate(node_network_transmit_errs_total[2m]) / rate(node_network_transmit_packets_total[2m]) > 0.01
             ||| % $._config,
-            'for': '1h',
+            'for': '15m',
             labels: {
               severity: 'warning',
             },

From 614030bb8027e9cbe7e39aec4bf7e1db3290b1fe Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <zhuravlev.vitaly@gmail.com>
Date: Tue, 28 Mar 2023 04:25:10 +0800
Subject: [PATCH 06/19] Set 'at' everywhere as preposition for instance

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 03eebc33..6c0ef5b4 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -231,7 +231,7 @@
             },
             annotations: {
               summary: 'Clock skew detected.',
-              description: 'Clock on {{ $labels.instance }} is out of sync by more than 0.05s. Ensure NTP is configured correctly on this host.',
+              description: 'Clock at {{ $labels.instance }} is out of sync by more than 0.05s. Ensure NTP is configured correctly on this host.',
             },
           },
           {
@@ -247,7 +247,7 @@
             },
             annotations: {
               summary: 'Clock not synchronising.',
-              description: 'Clock on {{ $labels.instance }} is not synchronising. Ensure NTP is configured on this host.',
+              description: 'Clock at {{ $labels.instance }} is not synchronising. Ensure NTP is configured on this host.',
             },
           },
           {
@@ -261,7 +261,7 @@
             },
             annotations: {
               summary: 'RAID Array is degraded',
-              description: "RAID array '{{ $labels.device }}' on {{ $labels.instance }} is in degraded state due to one or more disks failures. Number of spare drives is insufficient to fix issue automatically.",
+              description: "RAID array '{{ $labels.device }}' at {{ $labels.instance }} is in degraded state due to one or more disks failures. Number of spare drives is insufficient to fix issue automatically.",
             },
           },
           {
@@ -274,7 +274,7 @@
             },
             annotations: {
               summary: 'Failed device in RAID array',
-              description: "At least one device in RAID array on {{ $labels.instance }} failed. Array '{{ $labels.device }}' needs attention and possibly a disk swap.",
+              description: "At least one device in RAID array at {{ $labels.instance }} failed. Array '{{ $labels.device }}' needs attention and possibly a disk swap.",
             },
           },
           {
@@ -320,7 +320,7 @@
             },
             annotations: {
               summary: 'High CPU usage.',
-              description: 'CPU usage on {{ $labels.instance }} has been above 80% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
+              description: 'CPU usage at {{ $labels.instance }} has been above 80% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
             },
           },
           {
@@ -334,7 +334,7 @@
             },
             annotations: {
               summary: 'Host is running out of memory',
-              description: 'Memory is filling up on {{ $labels.instance }}, has been above 90% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
+              description: 'Memory is filling up at {{ $labels.instance }}, has been above 90% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
             },
           },
           {
@@ -348,7 +348,7 @@
             },
             annotations: {
               summary: 'Systemd service has entered failed state.',
-              description: 'Systemd service {{ $labels.name }} has entered failed state on {{ $labels.instance }}',
+              description: 'Systemd service {{ $labels.name }} has entered failed state at {{ $labels.instance }}',
             },
           },
         ],

From 94fc82e4183630050523535ff1683ab090349d53 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Tue, 28 Mar 2023 05:26:30 +0800
Subject: [PATCH 07/19] Add NodeDiskIOSaturation alert

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 6c0ef5b4..bcd955f1 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -333,10 +333,27 @@
               severity: 'warning',
             },
             annotations: {
-              summary: 'Host is running out of memory',
+              summary: 'Host is running out of memory.',
               description: 'Memory is filling up at {{ $labels.instance }}, has been above 90% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
             },
           },
+          {
+            alert: 'NodeDiskIOSaturation',
+            expr: |||
+              rate(node_disk_io_time_weighted_seconds_total{%(nodeExporterSelector)s}[5m]) > 10
+            ||| % $._config,
+            'for': '30m',
+            labels: {
+              severity: 'warning',
+            },
+            annotations: {
+              summary: 'Disk IO queue is high.',
+              description: |||
+                Disk IO queue (aqu-sq) is high on {{ $labels.device }} at {{ $labels.instance }}, has been above 10 for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.
+                This symptom might indicate disk saturation.,
+              |||,
+            },
+          },
           {
             alert: 'NodeSystemdServiceFailed',
             expr: |||

From 962de6c92119049918fd4290342d79b799838813 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Tue, 28 Mar 2023 05:27:04 +0800
Subject: [PATCH 08/19] Add %(nodeExporterSelector)s to Network and conntrack
 alerts

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index bcd955f1..52f3baaf 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -159,7 +159,7 @@
           {
             alert: 'NodeNetworkReceiveErrs',
             expr: |||
-              rate(node_network_receive_errs_total[2m]) / rate(node_network_receive_packets_total[2m]) > 0.01
+              rate(node_network_receive_errs_total{%(nodeExporterSelector)s}[2m]) / rate(node_network_receive_packets_total{%(nodeExporterSelector)s}[2m]) > 0.01
             ||| % $._config,
             'for': '15m',
             labels: {
@@ -173,7 +173,7 @@
           {
             alert: 'NodeNetworkTransmitErrs',
             expr: |||
-              rate(node_network_transmit_errs_total[2m]) / rate(node_network_transmit_packets_total[2m]) > 0.01
+              rate(node_network_transmit_errs_total{%(nodeExporterSelector)s}[2m]) / rate(node_network_transmit_packets_total{%(nodeExporterSelector)s}[2m]) > 0.01
             ||| % $._config,
             'for': '15m',
             labels: {
@@ -187,7 +187,7 @@
           {
             alert: 'NodeHighNumberConntrackEntriesUsed',
             expr: |||
-              (node_nf_conntrack_entries / node_nf_conntrack_entries_limit) > 0.75
+              (node_nf_conntrack_entries{%(nodeExporterSelector)s} / node_nf_conntrack_entries_limit) > 0.75
             ||| % $._config,
             annotations: {
               summary: 'Number of conntrack are getting close to the limit.',

From c3ec6e8af12efe28e3d9f6087a6f4e7d0b58ee24 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Tue, 28 Mar 2023 06:44:02 +0800
Subject: [PATCH 09/19] Add diskDevice selector

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 52f3baaf..15f5db8f 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -340,7 +340,7 @@
           {
             alert: 'NodeDiskIOSaturation',
             expr: |||
-              rate(node_disk_io_time_weighted_seconds_total{%(nodeExporterSelector)s}[5m]) > 10
+              rate(node_disk_io_time_weighted_seconds_total{%(nodeExporterSelector)s, %(diskDeviceSelector)s}[5m]) > 10
             ||| % $._config,
             'for': '30m',
             labels: {
@@ -349,7 +349,7 @@
             annotations: {
               summary: 'Disk IO queue is high.',
               description: |||
-                Disk IO queue (aqu-sq) is high on {{ $labels.device }} at {{ $labels.instance }}, has been above 10 for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.
+                Disk IO queue (aqu-sq) is high on {{ $labels.device }} at {{ $labels.instance }}, has been above 10 for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
                 This symptom might indicate disk saturation.,
               |||,
             },

From e15e7d6a7b9e674d00357d471ff8fa332704231f Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Tue, 28 Mar 2023 06:44:50 +0800
Subject: [PATCH 10/19] Fix NodeMemoryHighUtilization alert

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 15f5db8f..2ea61ba1 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -326,7 +326,7 @@
           {
             alert: 'NodeMemoryHighUtilization',
             expr: |||
-              100 - node_memory_MemAvailable_bytes{%(nodeExporterSelector)s} / node_memory_MemTotal_bytes{%(nodeExporterSelector)s} * 100 < 10
+              100 - (node_memory_MemAvailable_bytes{%(nodeExporterSelector)s} / node_memory_MemTotal_bytes{%(nodeExporterSelector)s} * 100) > 90
             ||| % $._config,
             'for': '15m',
             labels: {
@@ -334,7 +334,9 @@
             },
             annotations: {
               summary: 'Host is running out of memory.',
-              description: 'Memory is filling up at {{ $labels.instance }}, has been above 90% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
+              description: |||
+                Memory is filling up at {{ $labels.instance }}, has been above 90% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.
+              |||,
             },
           },
           {

From 580c497261dd03026a83266d2a383d7546fbbfd8 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Tue, 28 Mar 2023 06:58:17 +0800
Subject: [PATCH 11/19] Add NodeSystemSaturation and NodeMemoryMajorPagesFaults

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 37 ++++++++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 2ea61ba1..071cfd8d 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -323,6 +323,41 @@
               description: 'CPU usage at {{ $labels.instance }} has been above 80% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
             },
           },
+          {
+            alert: 'NodeSystemSaturation',
+            expr: |||
+              node_load1{%(nodeExporterSelector)s}
+              / count without (cpu, mode) (node_cpu_seconds_total{%(nodeExporterSelector)s, mode="idle"}) > 2
+            ||| % $._config,
+            'for': '15m',
+            labels: {
+              severity: 'critical',
+            },
+            annotations: {
+              summary: 'System saturated, load per core is very high.',
+              description: |||
+                System load per core at {{ $labels.instance }} has been above 2 for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
+                This might indicate this instance resources saturation and can cause it becoming unresponsive.
+              |||,
+            },
+          },
+          {
+            alert: 'NodeMemoryMajorPagesFaults',
+            expr: |||
+              rate(node_vmstat_pgmajfault{%(nodeExporterSelector)s}[5m]) > 500
+            ||| % $._config,
+            'for': '15m',
+            labels: {
+              severity: 'warning',
+            },
+            annotations: {
+              summary: 'Memory major page faults are occurring at very high rate.',
+              description: |||
+                Memory major pages are occurring at very high rate at {{ $labels.instance }}, 500 major page faults per second for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
+                Please check that there is enough memory available at this instance.
+              |||,
+            },
+          },
           {
             alert: 'NodeMemoryHighUtilization',
             expr: |||
@@ -352,7 +387,7 @@
               summary: 'Disk IO queue is high.',
               description: |||
                 Disk IO queue (aqu-sq) is high on {{ $labels.device }} at {{ $labels.instance }}, has been above 10 for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
-                This symptom might indicate disk saturation.,
+                This symptom might indicate disk saturation.
               |||,
             },
           },

From da32f8de1763ab42fc17f6b767561c4d6c22bb13 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Wed, 29 Mar 2023 19:29:58 +0800
Subject: [PATCH 12/19] Decrease NodeSystemdServiceFailed severity to warning

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 071cfd8d..5e82ff29 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -398,7 +398,7 @@
             ||| % $._config,
             'for': '5m',
             labels: {
-              severity: 'critical',
+              severity: 'warning',
             },
             annotations: {
               summary: 'Systemd service has entered failed state.',

From e48e7909f4c66f19350464da1b1f9f1eb164d3a2 Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Wed, 5 Apr 2023 23:47:10 +0800
Subject: [PATCH 13/19] Extend alert description

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 5e82ff29..3f8586d5 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -204,7 +204,7 @@
             ||| % $._config,
             annotations: {
               summary: 'Node Exporter text file collector failed to scrape.',
-              description: 'Node Exporter text file collector failed to scrape.',
+              description: 'Node Exporter text file collector on {{ $labels.instance }} failed to scrape.',
             },
             labels: {
               severity: 'warning',
@@ -260,7 +260,7 @@
               severity: 'critical',
             },
             annotations: {
-              summary: 'RAID Array is degraded',
+              summary: 'RAID Array is degraded.',
               description: "RAID array '{{ $labels.device }}' at {{ $labels.instance }} is in degraded state due to one or more disks failures. Number of spare drives is insufficient to fix issue automatically.",
             },
           },
@@ -273,7 +273,7 @@
               severity: 'warning',
             },
             annotations: {
-              summary: 'Failed device in RAID array',
+              summary: 'Failed device in RAID array.',
               description: "At least one device in RAID array at {{ $labels.instance }} failed. Array '{{ $labels.device }}' needs attention and possibly a disk swap.",
             },
           },

From 2111e70ac7f391bcd6945601da0c6a86a63b852f Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Wed, 5 Apr 2023 23:53:10 +0800
Subject: [PATCH 14/19] Add comma after 'mounted on'

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 3f8586d5..81ad3c64 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -21,7 +21,7 @@
             },
             annotations: {
               summary: 'Filesystem is predicted to run out of space within the next 24 hours.',
-              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left and is filling up.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }}, at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left and is filling up.',
             },
           },
           {
@@ -41,7 +41,7 @@
             },
             annotations: {
               summary: 'Filesystem is predicted to run out of space within the next 4 hours.',
-              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left and is filling up fast.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }}, at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left and is filling up fast.',
             },
           },
           {
@@ -59,7 +59,7 @@
             },
             annotations: {
               summary: 'Filesystem has less than %(fsSpaceAvailableWarningThreshold)d%% space left.' % $._config,
-              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }}, at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left.',
             },
           },
           {
@@ -77,7 +77,7 @@
             },
             annotations: {
               summary: 'Filesystem has less than %(fsSpaceAvailableCriticalThreshold)d%% space left.' % $._config,
-              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }}, at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left.',
             },
           },
           {
@@ -97,7 +97,7 @@
             },
             annotations: {
               summary: 'Filesystem is predicted to run out of inodes within the next 24 hours.',
-              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left and is filling up.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }}, at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left and is filling up.',
             },
           },
           {
@@ -117,7 +117,7 @@
             },
             annotations: {
               summary: 'Filesystem is predicted to run out of inodes within the next 4 hours.',
-              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left and is filling up fast.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }}, at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left and is filling up fast.',
             },
           },
           {
@@ -135,7 +135,7 @@
             },
             annotations: {
               summary: 'Filesystem has less than 5% inodes left.',
-              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }}, at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left.',
             },
           },
           {
@@ -153,7 +153,7 @@
             },
             annotations: {
               summary: 'Filesystem has less than 3% inodes left.',
-              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left.',
+              description: 'Filesystem on {{ $labels.device }}, mounted on {{ $labels.mountpoint }}, at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available inodes left.',
             },
           },
           {

From 77ae769179acf92cee40fa5d27aa41d817496a7a Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Thu, 6 Apr 2023 00:21:50 +0800
Subject: [PATCH 15/19] Add thresholds for memory alerts

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 10 +++++-----
 docs/node-mixin/config.libsonnet        |  8 ++++++++
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 81ad3c64..a51e6f2c 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -344,7 +344,7 @@
           {
             alert: 'NodeMemoryMajorPagesFaults',
             expr: |||
-              rate(node_vmstat_pgmajfault{%(nodeExporterSelector)s}[5m]) > 500
+              rate(node_vmstat_pgmajfault{%(nodeExporterSelector)s}[5m]) > %(memoryMajorPagesFaultsWarningThreshold)s
             ||| % $._config,
             'for': '15m',
             labels: {
@@ -353,15 +353,15 @@
             annotations: {
               summary: 'Memory major page faults are occurring at very high rate.',
               description: |||
-                Memory major pages are occurring at very high rate at {{ $labels.instance }}, 500 major page faults per second for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
+                Memory major pages are occurring at very high rate at {{ $labels.instance }}, %(memoryMajorPagesFaultsWarningThreshold)s major page faults per second for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
                 Please check that there is enough memory available at this instance.
-              |||,
+              ||| % $._config,
             },
           },
           {
             alert: 'NodeMemoryHighUtilization',
             expr: |||
-              100 - (node_memory_MemAvailable_bytes{%(nodeExporterSelector)s} / node_memory_MemTotal_bytes{%(nodeExporterSelector)s} * 100) > 90
+              100 - (node_memory_MemAvailable_bytes{%(nodeExporterSelector)s} / node_memory_MemTotal_bytes{%(nodeExporterSelector)s} * 100) > %(memoryHighUtilizationThreshold)s
             ||| % $._config,
             'for': '15m',
             labels: {
@@ -370,7 +370,7 @@
             annotations: {
               summary: 'Host is running out of memory.',
               description: |||
-                Memory is filling up at {{ $labels.instance }}, has been above 90% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.
+                Memory is filling up at {{ $labels.instance }}, has been above %(memoryHighUtilizationThreshold)s% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.
               |||,
             },
           },
diff --git a/docs/node-mixin/config.libsonnet b/docs/node-mixin/config.libsonnet
index 86179c8f..0e32ac15 100644
--- a/docs/node-mixin/config.libsonnet
+++ b/docs/node-mixin/config.libsonnet
@@ -60,6 +60,14 @@
     fsSpaceAvailableWarningThreshold: 5,
     fsSpaceAvailableCriticalThreshold: 3,
 
+    // Memory utilzation (%) level on which to trigger the
+    // 'NodeMemoryHighUtilization' alert.
+    memoryHighUtilizationThreshold: 90,
+
+    // Threshold for the rate of memory major page faults to trigger
+    // 'NodeMemoryMajorPagesFaults' alert.
+    memoryMajorPagesFaultsWarningThreshold: 500,
+
     rateInterval: '5m',
     // Opt-in for multi-cluster support.
     showMultiCluster: false,

From 6bdc1d9c98f237b6c165b5365c96a200fe3c667a Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Thu, 6 Apr 2023 00:56:00 +0800
Subject: [PATCH 16/19] Add thresholds for memory, disk and system alerts

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 22 +++++++++++-----------
 docs/node-mixin/config.libsonnet        | 11 ++++++++++-
 2 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index a51e6f2c..68455e44 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -327,7 +327,7 @@
             alert: 'NodeSystemSaturation',
             expr: |||
               node_load1{%(nodeExporterSelector)s}
-              / count without (cpu, mode) (node_cpu_seconds_total{%(nodeExporterSelector)s, mode="idle"}) > 2
+              / count without (cpu, mode) (node_cpu_seconds_total{%(nodeExporterSelector)s, mode="idle"}) > %(systemSaturationPerCoreThreshold)d
             ||| % $._config,
             'for': '15m',
             labels: {
@@ -336,15 +336,15 @@
             annotations: {
               summary: 'System saturated, load per core is very high.',
               description: |||
-                System load per core at {{ $labels.instance }} has been above 2 for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
+                System load per core at {{ $labels.instance }} has been above %(systemSaturationPerCoreThreshold)d for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
                 This might indicate this instance resources saturation and can cause it becoming unresponsive.
-              |||,
+              ||| % $._config,
             },
           },
           {
             alert: 'NodeMemoryMajorPagesFaults',
             expr: |||
-              rate(node_vmstat_pgmajfault{%(nodeExporterSelector)s}[5m]) > %(memoryMajorPagesFaultsWarningThreshold)s
+              rate(node_vmstat_pgmajfault{%(nodeExporterSelector)s}[5m]) > %(memoryMajorPagesFaultsThreshold)d
             ||| % $._config,
             'for': '15m',
             labels: {
@@ -353,7 +353,7 @@
             annotations: {
               summary: 'Memory major page faults are occurring at very high rate.',
               description: |||
-                Memory major pages are occurring at very high rate at {{ $labels.instance }}, %(memoryMajorPagesFaultsWarningThreshold)s major page faults per second for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
+                Memory major pages are occurring at very high rate at {{ $labels.instance }}, %(memoryMajorPagesFaultsThreshold)d major page faults per second for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
                 Please check that there is enough memory available at this instance.
               ||| % $._config,
             },
@@ -361,7 +361,7 @@
           {
             alert: 'NodeMemoryHighUtilization',
             expr: |||
-              100 - (node_memory_MemAvailable_bytes{%(nodeExporterSelector)s} / node_memory_MemTotal_bytes{%(nodeExporterSelector)s} * 100) > %(memoryHighUtilizationThreshold)s
+              100 - (node_memory_MemAvailable_bytes{%(nodeExporterSelector)s} / node_memory_MemTotal_bytes{%(nodeExporterSelector)s} * 100) > %(memoryHighUtilizationThreshold)d
             ||| % $._config,
             'for': '15m',
             labels: {
@@ -370,14 +370,14 @@
             annotations: {
               summary: 'Host is running out of memory.',
               description: |||
-                Memory is filling up at {{ $labels.instance }}, has been above %(memoryHighUtilizationThreshold)s% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.
-              |||,
+                Memory is filling up at {{ $labels.instance }}, has been above %(memoryHighUtilizationThreshold)d%% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.
+              ||| % $._config,
             },
           },
           {
             alert: 'NodeDiskIOSaturation',
             expr: |||
-              rate(node_disk_io_time_weighted_seconds_total{%(nodeExporterSelector)s, %(diskDeviceSelector)s}[5m]) > 10
+              rate(node_disk_io_time_weighted_seconds_total{%(nodeExporterSelector)s, %(diskDeviceSelector)s}[5m]) > %(diskIOSaturationThreshold)d
             ||| % $._config,
             'for': '30m',
             labels: {
@@ -386,9 +386,9 @@
             annotations: {
               summary: 'Disk IO queue is high.',
               description: |||
-                Disk IO queue (aqu-sq) is high on {{ $labels.device }} at {{ $labels.instance }}, has been above 10 for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
+                Disk IO queue (aqu-sq) is high on {{ $labels.device }} at {{ $labels.instance }}, has been above %(diskIOSaturationThreshold)d for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
                 This symptom might indicate disk saturation.
-              |||,
+              ||| % $._config,
             },
           },
           {
diff --git a/docs/node-mixin/config.libsonnet b/docs/node-mixin/config.libsonnet
index 0e32ac15..49ca6ff8 100644
--- a/docs/node-mixin/config.libsonnet
+++ b/docs/node-mixin/config.libsonnet
@@ -43,6 +43,11 @@
     // just a warning for K8s nodes.
     nodeCriticalSeverity: 'critical',
 
+
+    // Load average 1m (per core) on which to trigger the
+    // 'NodeSystemSaturation' alert.
+    systemSaturationPerCoreThreshold: 2,
+
     // Available disk space (%) thresholds on which to trigger the
     // 'NodeFilesystemSpaceFillingUp' alerts. These alerts fire if the disk
     // usage grows in a way that it is predicted to run out in 4h or 1d
@@ -66,7 +71,11 @@
 
     // Threshold for the rate of memory major page faults to trigger
     // 'NodeMemoryMajorPagesFaults' alert.
-    memoryMajorPagesFaultsWarningThreshold: 500,
+    memoryMajorPagesFaultsThreshold: 500,
+
+    // Disk IO queue level above which to trigger
+    // 'NodeDiskIOSaturation' alert.
+    diskIOSaturationThreshold: 10,
 
     rateInterval: '5m',
     // Opt-in for multi-cluster support.

From b7dfb32bfc1e20bf8c7493427ac085d550589c7e Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Thu, 6 Apr 2023 02:30:53 +0800
Subject: [PATCH 17/19] Set severity to NodeCPUHighUsage to info

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 16 +++++++++-------
 docs/node-mixin/config.libsonnet        |  4 +++-
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 68455e44..65794219 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -312,15 +312,17 @@
           {
             alert: 'NodeCPUHighUsage',
             expr: |||
-              sum without(mode) (avg without (cpu) (rate(node_cpu_seconds_total{%(nodeExporterSelector)s, mode!="idle"}[2m]))) > 0.8
+              sum without(mode) (avg without (cpu) (rate(node_cpu_seconds_total{%(nodeExporterSelector)s, mode!="idle"}[2m]))) * 100 > %(cpuHighUsageThreshold)d
             ||| % $._config,
             'for': '15m',
             labels: {
-              severity: 'warning',
+              severity: 'info',
             },
             annotations: {
               summary: 'High CPU usage.',
-              description: 'CPU usage at {{ $labels.instance }} has been above 80% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.',
+              description: |||
+                CPU usage at {{ $labels.instance }} has been above %(cpuHighUsageThreshold)d%% for the last 15 minutes, is currently at {{ printf "%%.2f" $value }}%%.
+              ||| % $._config,
             },
           },
           {
@@ -336,7 +338,7 @@
             annotations: {
               summary: 'System saturated, load per core is very high.',
               description: |||
-                System load per core at {{ $labels.instance }} has been above %(systemSaturationPerCoreThreshold)d for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
+                System load per core at {{ $labels.instance }} has been above %(systemSaturationPerCoreThreshold)d for the last 15 minutes, is currently at {{ printf "%%.2f" $value }}.
                 This might indicate this instance resources saturation and can cause it becoming unresponsive.
               ||| % $._config,
             },
@@ -353,7 +355,7 @@
             annotations: {
               summary: 'Memory major page faults are occurring at very high rate.',
               description: |||
-                Memory major pages are occurring at very high rate at {{ $labels.instance }}, %(memoryMajorPagesFaultsThreshold)d major page faults per second for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
+                Memory major pages are occurring at very high rate at {{ $labels.instance }}, %(memoryMajorPagesFaultsThreshold)d major page faults per second for the last 15 minutes, is currently at {{ printf "%%.2f" $value }}.
                 Please check that there is enough memory available at this instance.
               ||| % $._config,
             },
@@ -370,7 +372,7 @@
             annotations: {
               summary: 'Host is running out of memory.',
               description: |||
-                Memory is filling up at {{ $labels.instance }}, has been above %(memoryHighUtilizationThreshold)d%% for the last 15 minutes, is currently at {{ printf "%.2f" $value }}%.
+                Memory is filling up at {{ $labels.instance }}, has been above %(memoryHighUtilizationThreshold)d%% for the last 15 minutes, is currently at {{ printf "%%.2f" $value }}%%.
               ||| % $._config,
             },
           },
@@ -386,7 +388,7 @@
             annotations: {
               summary: 'Disk IO queue is high.',
               description: |||
-                Disk IO queue (aqu-sq) is high on {{ $labels.device }} at {{ $labels.instance }}, has been above %(diskIOSaturationThreshold)d for the last 15 minutes, is currently at {{ printf "%.2f" $value }}.
+                Disk IO queue (aqu-sq) is high on {{ $labels.device }} at {{ $labels.instance }}, has been above %(diskIOSaturationThreshold)d for the last 15 minutes, is currently at {{ printf "%%.2f" $value }}.
                 This symptom might indicate disk saturation.
               ||| % $._config,
             },
diff --git a/docs/node-mixin/config.libsonnet b/docs/node-mixin/config.libsonnet
index 49ca6ff8..4427b59d 100644
--- a/docs/node-mixin/config.libsonnet
+++ b/docs/node-mixin/config.libsonnet
@@ -43,7 +43,9 @@
     // just a warning for K8s nodes.
     nodeCriticalSeverity: 'critical',
 
-
+    // CPU utilization (%) on which to trigger the
+    // 'NodeCPUHighUsage' alert.
+    cpuHighUsageThreshold: 90,
     // Load average 1m (per core) on which to trigger the
     // 'NodeSystemSaturation' alert.
     systemSaturationPerCoreThreshold: 2,

From 3e250a95a028ad4ed8c778148aac6d9ab89536ea Mon Sep 17 00:00:00 2001
From: Vitaly <v-zhuravlev@users.noreply.github.com>
Date: Wed, 26 Apr 2023 22:52:40 +0800
Subject: [PATCH 18/19] Update NodeSystemSaturation severity

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index 65794219..df4a3d14 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -333,7 +333,7 @@
             ||| % $._config,
             'for': '15m',
             labels: {
-              severity: 'critical',
+              severity: 'warning',
             },
             annotations: {
               summary: 'System saturated, load per core is very high.',

From e8d7f4e8b3ced919a16e3afb7056564833ba05ed Mon Sep 17 00:00:00 2001
From: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
Date: Thu, 29 Jun 2023 23:24:03 +0800
Subject: [PATCH 19/19] Revert alerts pending durtions

Signed-off-by: Vitaly Zhuravlev <v-zhuravlev@users.noreply.github.com>
---
 docs/node-mixin/alerts/alerts.libsonnet | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/docs/node-mixin/alerts/alerts.libsonnet b/docs/node-mixin/alerts/alerts.libsonnet
index df4a3d14..1eaedd3d 100644
--- a/docs/node-mixin/alerts/alerts.libsonnet
+++ b/docs/node-mixin/alerts/alerts.libsonnet
@@ -53,7 +53,7 @@
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
-            'for': '15m',
+            'for': '30m',
             labels: {
               severity: 'warning',
             },
@@ -71,7 +71,7 @@
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
-            'for': '15m',
+            'for': '30m',
             labels: {
               severity: '%(nodeCriticalSeverity)s' % $._config,
             },
@@ -129,7 +129,7 @@
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
-            'for': '15m',
+            'for': '1h',
             labels: {
               severity: 'warning',
             },
@@ -147,7 +147,7 @@
                 node_filesystem_readonly{%(nodeExporterSelector)s,%(fsSelector)s,%(fsMountpointSelector)s} == 0
               )
             ||| % $._config,
-            'for': '15m',
+            'for': '1h',
             labels: {
               severity: '%(nodeCriticalSeverity)s' % $._config,
             },
@@ -161,7 +161,7 @@
             expr: |||
               rate(node_network_receive_errs_total{%(nodeExporterSelector)s}[2m]) / rate(node_network_receive_packets_total{%(nodeExporterSelector)s}[2m]) > 0.01
             ||| % $._config,
-            'for': '15m',
+            'for': '1h',
             labels: {
               severity: 'warning',
             },
@@ -175,7 +175,7 @@
             expr: |||
               rate(node_network_transmit_errs_total{%(nodeExporterSelector)s}[2m]) / rate(node_network_transmit_packets_total{%(nodeExporterSelector)s}[2m]) > 0.01
             ||| % $._config,
-            'for': '15m',
+            'for': '1h',
             labels: {
               severity: 'warning',
             },