diff options
Diffstat (limited to 'krebs/2configs/shack/prometheus')
| -rw-r--r-- | krebs/2configs/shack/prometheus/alert-rules.nix | 135 | ||||
| -rw-r--r-- | krebs/2configs/shack/prometheus/server.nix | 9 |
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"; |