261 lines
10 KiB
Nix
261 lines
10 KiB
Nix
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{ lib }:
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let
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# docker's filesystems disappear quickly, leading to false positives
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deviceFilter = ''path!~"^(/var/lib/docker|/nix/store).*"'';
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in
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lib.mapAttrsToList
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(name: opts: {
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alert = name;
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expr = opts.condition;
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for = opts.time or "2m";
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labels = { };
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annotations.description = opts.description;
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})
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({
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# prometheus_too_many_restarts = {
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# condition = ''changes(process_start_time_seconds{job=~"prometheus|alertmanager"}[15m]) > 2'';
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# description = "Prometheus has restarted more than twice in the last 15 minutes. It might be crashlooping.";
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# };
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# alert_manager_config_not_synced = {
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# condition = ''count(count_values("config_hash", alertmanager_config_hash)) > 1'';
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# description = "Configurations of AlertManager cluster instances are out of sync.";
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# };
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#alert_manager_e2e_dead_man_switch = {
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# condition = "vector(1)";
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# description = "Prometheus DeadManSwitch is an always-firing alert. It's used as an end-to-end test of Prometheus through the Alertmanager.";
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#};
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# prometheus_not_connected_to_alertmanager = {
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# condition = "prometheus_notifications_alertmanagers_discovered < 1";
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# description = "Prometheus cannot connect the alertmanager\n VALUE = {{ $value }}\n LABELS = {{ $labels }}";
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# };
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# prometheus_rule_evaluation_failures = {
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# condition = "increase(prometheus_rule_evaluation_failures_total[3m]) > 0";
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# description = "Prometheus encountered {{ $value }} rule evaluation failures, leading to potentially ignored alerts.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}";
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# };
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# prometheus_template_expansion_failures = {
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# condition = "increase(prometheus_template_text_expansion_failures_total[3m]) > 0";
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# time = "0m";
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# description = "Prometheus encountered {{ $value }} template text expansion failures\n VALUE = {{ $value }}\n LABELS = {{ $labels }}";
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# };
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# promtail_file_lagging = {
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# condition = ''abs(promtail_file_bytes_total - promtail_read_bytes_total) > 1e6'';
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# time = "15m";
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# description = ''{{ $labels.instance }} {{ $labels.job }} {{ $labels.path }} has been lagging by more than 1MB for more than 15m.'';
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# };
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filesystem_full_80percent = {
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condition = ''
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100 - ((node_filesystem_avail_bytes{fstype!="rootfs",mountpoint="/"} * 100) / node_filesystem_size_bytes{fstype!="rootfs",mountpoint="/"}) > 80'';
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time = "10m";
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description =
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"{{$labels.instance}} device {{$labels.device}} on {{$labels.mountpoint}} got less than 20% space left on its filesystem.";
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};
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# filesystem_inodes_full = {
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# condition = ''disk_inodes_free / disk_inodes_total < 0.10'';
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# time = "10m";
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# description = "{{$labels.instance}} device {{$labels.device}} on {{$labels.mountpoint}} got less than 10% inodes left on its filesystem.";
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# };
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# daily_task_not_run = {
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# # give 6 hours grace period
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# condition = ''time() - task_last_run{state="ok",frequency="daily"} > (24 + 6) * 60 * 60'';
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# description = "{{$labels.instance}}: {{$labels.name}} was not run in the last 24h";
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# };
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# daily_task_failed = {
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# condition = ''task_last_run{state="fail"}'';
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# description = "{{$labels.instance}}: {{$labels.name}} failed to run";
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# };
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# } // (lib.genAttrs [
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# "borgbackup-turingmachine"
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# "borgbackup-eve"
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# "borgbackup-datastore"
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# ]
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# (name: {
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# condition = ''absent_over_time(task_last_run{name="${name}"}[1d])'';
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# description = "status of ${name} is unknown: no data for a day";
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# }))
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# // {
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# borgbackup_matchbox_not_run = {
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# # give 6 hours grace period
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# condition = ''time() - task_last_run{state="ok",frequency="daily",name="borgbackup-matchbox"} > 7 * 24 * 60 * 60'';
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# description = "{{$labels.instance}}: {{$labels.name}} was not run in the last week";
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# };
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# borgbackup_matchbox = {
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# condition = ''absent_over_time(task_last_run{name="borgbackup-matchbox"}[7d])'';
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# description = "status of borgbackup-matchbox is unknown: no data for a week";
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# };
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# homeassistant = {
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# condition = ''
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# homeassistant_entity_available{domain="persistent_notification", entity!="persistent_notification.http_login"} >= 0'';
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# description =
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# "homeassistant notification {{$labels.entity}} ({{$labels.friendly_name}}): {{$value}}";
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# };
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swap_using_20percent = {
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condition =
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"node_memory_SwapTotal_bytes - (node_memory_SwapCached_bytes + node_memory_SwapFree_bytes) > node_memory_SwapTotal_bytes * 0.2";
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time = "30m";
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description =
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"{{$labels.instance}} is using 20% of its swap space for at least 30 minutes.";
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};
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systemd_service_failed = {
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condition = ''node_systemd_unit_state{state="failed"} == 1'';
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description =
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"{{$labels.instance}} failed to (re)start service {{$labels.name}}.";
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};
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restic_backup_too_old = {
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condition = ''(time() - restic_snapshots_latest_time)/(60*60) > 24'';
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description = "{{$labels.instance}} not backed up for more than 24 hours. ({{$value}})";
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};
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host_down = {
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condition = ''up{job="node-stats", instance!~"ahorn.wireguard:9100|kartoffel.wireguard:9100|mega.wireguard:9100"} == 0'';
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description = "{{$labels.instance}} is down!";
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};
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# service_not_running = {
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# condition = ''systemd_units_active_code{name=~"teamspeak3-server.service|tt-rss.service", sub!="running"}'';
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# description = "{{$labels.instance}} should have a running {{$labels.name}}.";
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# };
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ram_using_90percent = {
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condition =
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"node_memory_Buffers_bytes + node_memory_MemFree_bytes + node_memory_Cached_bytes < node_memory_MemTotal_bytes * 0.1";
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time = "1h";
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description =
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"{{$labels.instance}} is using at least 90% of its RAM for at least 1 hour.";
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};
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cpu_using_90percent = {
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condition = ''
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100 - (avg by (instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) >= 90'';
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time = "10m";
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description =
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"{{$labels.instance}} is running with cpu usage > 90% for at least 10 minutes: {{$value}}";
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};
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reboot = {
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condition = "node_boot_time_seconds < 300";
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description = "{{$labels.instance}} just rebooted.";
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};
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uptime = {
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condition = "(time() - node_boot_time_seconds ) / (60*60*24) > 30";
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description =
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"Uptime monster: {{$labels.instance}} has been up for more than 30 days.";
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};
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flake_nixpkgs_outdated = {
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condition = ''
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(time() - flake_input_last_modified{input="nixpkgs"}) / (60*60*24) > 30'';
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description =
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"Nixpkgs outdated: Nixpkgs on {{$labels.instance}} has not been updated in 30 days";
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};
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/* ping = {
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condition = "ping_result_code{type!='mobile'} != 0";
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description = "{{$labels.url}}: ping from {{$labels.instance}} has failed!";
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};
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ping_high_latency = {
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condition = "ping_average_response_ms{type!='mobile'} > 5000";
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description = "{{$labels.instance}}: ping probe from {{$labels.source}} is encountering high latency!";
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};
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*/
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http_status = {
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condition = ''
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probe_http_status_code{instance!~"https://megaclan3000.de"} != 200'';
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description =
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"http request failed from {{$labels.instance}}: {{$labels.result}}!";
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};
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/* http_match_failed = {
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condition = "http_response_response_string_match == 0";
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description = "{{$labels.server}} : http body not as expected; status code: {{$labels.status_code}}!";
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};
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dns_query = {
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condition = "dns_query_result_code != 0";
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description = "{{$labels.domain}} : could retrieve A record {{$labels.instance}} from server {{$labels.server}}: {{$labels.result}}!";
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};
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secure_dns_query = {
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condition = "secure_dns_state != 0";
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description = "{{$labels.domain}} : could retrieve A record {{$labels.instance}} from server {{$labels.server}}: {{$labels.result}} for protocol {{$labels.protocol}}!";
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};
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connection_failed = {
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condition = "net_response_result_code != 0";
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description = "{{$labels.server}}: connection to {{$labels.port}}({{$labels.protocol}}) failed from {{$labels.instance}}";
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};
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healthchecks = {
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condition = "hc_check_up == 0";
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description = "{{$labels.instance}}: healtcheck {{$labels.job}} fails!";
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};
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*/
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cert_expiry = {
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condition = "(probe_ssl_earliest_cert_expiry - time())/(3600*24) < 30";
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description =
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"{{$labels.instance}}: The TLS certificate will expire in less than 30 days: {{$value}}s";
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};
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# ignore devices that disabled S.M.A.R.T (example if attached via USB)
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# smart_errors = {
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# condition = ''smart_device_health_ok{enabled!="Disabled"} != 1'';
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# description =
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# "{{$labels.instance}}: S.M.A.R.T reports: {{$labels.device}} ({{$labels.model}}) has errors.";
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# };
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oom_kills = {
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condition = "increase(node_vmstat_oom_kill[5m]) > 0";
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description = "{{$labels.instance}}: OOM kill detected";
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};
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/* unusual_disk_read_latency = {
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condition =
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"rate(diskio_read_time[1m]) / rate(diskio_reads[1m]) > 0.1 and rate(diskio_reads[1m]) > 0";
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description = ''
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{{$labels.instance}}: Disk latency is growing (read operations > 100ms)
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'';
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};
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unusual_disk_write_latency = {
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condition =
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"rate(diskio_write_time[1m]) / rate(diskio_write[1m]) > 0.1 and rate(diskio_write[1m]) > 0";
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description = ''
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{{$labels.instance}}: Disk latency is growing (write operations > 100ms)
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'';
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};
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*/
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host_memory_under_memory_pressure = {
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condition = "rate(node_vmstat_pgmajfault[1m]) > 1000";
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description =
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"{{$labels.instance}}: The node is under heavy memory pressure. High rate of major page faults: {{$value}}";
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};
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# ext4_errors = {
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# condition = "ext4_errors_value > 0";
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# description =
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# "{{$labels.instance}}: ext4 has reported {{$value}} I/O errors: check /sys/fs/ext4/*/errors_count";
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# };
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# alerts_silences_changed = {
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# condition = ''abs(delta(alertmanager_silences{state="active"}[1h])) >= 1'';
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# description =
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# "alertmanager: number of active silences has changed: {{$value}}";
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# };
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})
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