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-rw-r--r--krebs/2configs/shack/prometheus/alert-rules.nix135
-rw-r--r--krebs/2configs/shack/prometheus/server.nix9
2 files changed, 43 insertions, 101 deletions
diff --git a/krebs/2configs/shack/prometheus/alert-rules.nix b/krebs/2configs/shack/prometheus/alert-rules.nix
index afef5b8a4..730921bee 100644
--- a/krebs/2configs/shack/prometheus/alert-rules.nix
+++ b/krebs/2configs/shack/prometheus/alert-rules.nix
@@ -1,97 +1,42 @@
-{ lib }:
-with lib;
-
+{ lib,... }:
let
- deviceFilter = ''device!="ramfs",device!="rpc_pipefs",device!="lxcfs",device!="nsfs",device!="borgfs"'';
-in mapAttrsToList (name: opts: {
- alert = name;
- expr = opts.condition;
- for = opts.time or "2m";
- labels = if (opts.page or true) then { severity = "page"; } else {};
- annotations = {
- summary = opts.summary;
- description = opts.description;
- };
-}) {
- node_down = {
- condition = ''up{job="node"} == 0'';
- summary = "{{$labels.alias}}: Node is down.";
- description = "{{$labels.alias}} has been down for more than 2 minutes.";
- };
- node_systemd_service_failed = {
- condition = ''node_systemd_unit_state{state="failed"} == 1'';
- summary = "{{$labels.alias}}: Service {{$labels.name}} failed to start.";
- description = "{{$labels.alias}} failed to (re)start service {{$labels.name}}.";
- };
- node_filesystem_full_80percent = {
- condition = ''sort(node_filesystem_free_bytes{${deviceFilter}} < node_filesystem_size_bytes{${deviceFilter}} * 0.2) / 1024^3'';
- time = "10m";
- summary = "{{$labels.alias}}: Filesystem is running out of space soon.";
- description = "{{$labels.alias}} device {{$labels.device}} on {{$labels.mountpoint}} got less than 20% space left on its filesystem.";
- };
- node_filesystem_full_in_7d = {
- condition = ''predict_linear(node_filesystem_free_bytes{${deviceFilter}}[2d], 7*24*3600) <= 0'';
- time = "1h";
- summary = "{{$labels.alias}}: Filesystem is running out of space in 7 days.";
- description = "{{$labels.alias}} device {{$labels.device}} on {{$labels.mountpoint}} is running out of space of in approx. 7 days";
- };
- node_filesystem_full_in_30d = {
- condition = ''predict_linear(node_filesystem_free_bytes{${deviceFilter}}[30d], 30*24*3600) <= 0'';
- time = "1h";
- summary = "{{$labels.alias}}: Filesystem is running out of space in 30 days.";
- description = "{{$labels.alias}} device {{$labels.device}} on {{$labels.mountpoint}} is running out of space of in approx. 30 days";
- };
- node_filedescriptors_full_in_3h = {
- condition = ''predict_linear(node_filefd_allocated[3h], 3*3600) >= node_filefd_maximum'';
- time = "20m";
- summary = "{{$labels.alias}} is running out of available file descriptors in 3 hours.";
- description = "{{$labels.alias}} is running out of available file descriptors in approx. 3 hours";
- };
- node_filedescriptors_full_in_7d = {
- condition = ''predict_linear(node_filefd_allocated[7d], 7*24*3600) >= node_filefd_maximum'';
- time = "1h";
- summary = "{{$labels.alias}} is running out of available file descriptors in 7 days.";
- description = "{{$labels.alias}} is running out of available file descriptors in approx. 7 days";
- };
- node_load15 = {
- condition = ''node_load15 / on(alias) count(node_cpu_seconds_total{mode="system"}) by (alias) >= 1.0'';
- time = "10m";
- summary = "{{$labels.alias}}: Running on high load: {{$value}}";
- description = "{{$labels.alias}} is running with load15 > 1 for at least 5 minutes: {{$value}}";
- };
- node_ram_using_90percent = {
- condition = "node_memory_MemFree_bytes + node_memory_Buffers_bytes + node_memory_Cached_bytes < node_memory_MemTotal_bytes * 0.1";
- time = "1h";
- summary = "{{$labels.alias}}: Using lots of RAM.";
- description = "{{$labels.alias}} is using at least 90% of its RAM for at least 1 hour.";
- };
- node_swap_using_30percent = {
- condition = "node_memory_SwapTotal_bytes - (node_memory_SwapFree_bytes + node_memory_SwapCached_bytes) > node_memory_SwapTotal_bytes * 0.3";
- time = "30m";
- summary = "{{$labels.alias}}: Using more than 30% of its swap.";
- description = "{{$labels.alias}} is using 30% of its swap space for at least 30 minutes.";
- };
- node_hwmon_temp = {
- condition = "node_hwmon_temp_celsius > node_hwmon_temp_crit_celsius*0.9 OR node_hwmon_temp_celsius > node_hwmon_temp_max_celsius*0.95";
- time = "5m";
- summary = "{{$labels.alias}}: Sensor {{$labels.sensor}}/{{$labels.chip}} temp is high: {{$value}} ";
- description = "{{$labels.alias}} reports hwmon sensor {{$labels.sensor}}/{{$labels.chip}} temperature value is nearly critical: {{$value}}";
- };
- node_conntrack_limit = {
- condition = "node_nf_conntrack_entries_limit - node_nf_conntrack_entries < 1000";
- time = "5m";
- summary = "{{$labels.alias}}: Number of tracked connections high";
- description = "{{$labels.alias}} has only {{$value}} free slots for connection tracking available.";
- };
- node_reboot = {
- condition = "time() - node_boot_time_seconds < 300";
- summary = "{{$labels.alias}}: Reboot";
- description = "{{$labels.alias}} just rebooted.";
- };
- node_uptime = {
- condition = "time() - node_boot_time_seconds > 2592000";
- page = false;
- summary = "{{$labels.alias}}: Uptime monster";
- description = "{{$labels.alias}} has been up for more than 30 days.";
- };
+ disk_free_threshold = "10"; # at least this much free disk percentage
+in {
+ services.prometheus.rules = [(builtins.toJSON
+ {
+ groups = [
+ { name = "shack-env";
+ rules = [
+ {
+ alert = "RootPartitionFull";
+ for = "30m";
+ expr = ''(node_filesystem_avail_bytes{alias="wolf",mountpoint="/"} * 100) / node_filesystem_size_bytes{alias="wolf",mountpoint="/"} < ${disk_free_threshold}'';
+ labels.severity = "warning";
+ annotations.summary = "{{ $labels.alias }} root disk full";
+ annotations.url = "http://grafana.shack/";
+ annotations.description = ''The root disk of {{ $labels.alias }} has {{ $value | printf "%.2f" }}% free disk space (Threshold at ${disk_free_threshold}%).A vast number of shackspace services will stop working. CI for deploying new configuration will also seize working. Log in to the system and run `nix-collect-garbage -d` and clean up the shack share folder in `/home/share` .If this does not help you can check `du -hs /var/ | sort -h`, run `docker system prune` or if you are really desperate run `du -hs / | sort -h` and go through the folders recursively until you've found something to delete'';
+ }
+ {
+ alert = "RootPartitionFull";
+ for = "30m";
+ expr = ''(node_filesystem_avail_bytes{alias="puyak",mountpoint="/"} * 100) / node_filesystem_size_bytes{alias="puyak",mountpoint="/"} < ${disk_free_threshold}'';
+ labels.severity = "warning";
+ annotations.summary = "{{ $labels.alias }} root disk full";
+ annotations.url = "http://grafana.shack/";
+ annotations.description = ''The root disk of {{ $labels.alias }} has {{ $value | printf "%.2f" }}% free disk space (Threshold at ${disk_free_threshold}%).Prometheus will not be able to create new alerts and CI for deploying new configuration will also seize working. Log in to the system and run `nix-collect-garbage -d` and if this does not help you can check `du -hs /var/ | sort -h`, run `docker system prune` or if you are really desperate run `du -hs / | sort -h` and go through the folders recursively until you've found something to delete'';
+ }
+ {
+ alert = "HostDown";
+ expr = ''up{alias="wolf"} == 0'';
+ for = "5m";
+ labels.severity = "page";
+ annotations.summary = "Instance {{ $labels.alias }} down for 5 minutes";
+ annotations.url = "http://grafana.shack/";
+ annotations.description = ''Host {{ $labels.alias }} went down and has not been reconnected after 5 minutes. This is probably bad news, try to restart the host via naproxen ( http://naproxen.shack:8006 ). Wolf being down means that CI,glados automation, light management and a couple of other services will not work anymore.'';
+ }
+ ];
+ }
+ ];
+ }
+ )];
}
diff --git a/krebs/2configs/shack/prometheus/server.nix b/krebs/2configs/shack/prometheus/server.nix
index a10a43af7..9e4b4d1a7 100644
--- a/krebs/2configs/shack/prometheus/server.nix
+++ b/krebs/2configs/shack/prometheus/server.nix
@@ -1,6 +1,9 @@
{ pkgs, lib, config, ... }:
# from https://gist.github.com/globin/02496fd10a96a36f092a8e7ea0e6c7dd
{
+ imports = [
+ ./alert-rules.nix
+ ];
networking = {
firewall.allowedTCPPorts = [
9090 # prometheus
@@ -18,12 +21,6 @@
};
prometheus = {
enable = true;
- ruleFiles = lib.singleton (pkgs.writeText "prometheus-rules.yml" (builtins.toJSON {
- groups = lib.singleton {
- name = "mf-alerting-rules";
- rules = import ./alert-rules.nix { inherit lib; };
- };
- }));
scrapeConfigs = [
{
job_name = "node";
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 18:38:58 +0000