diff options
Diffstat (limited to 'krebs/2configs')
| -rw-r--r-- | krebs/2configs/shack/prometheus/node.nix | 27 | ||||
| -rw-r--r-- | krebs/2configs/shack/prometheus/server.nix | 195 | ||||
| -rw-r--r-- | krebs/2configs/shack/prometheus/unifi.nix | 10 |
3 files changed, 232 insertions, 0 deletions
diff --git a/krebs/2configs/shack/prometheus/node.nix b/krebs/2configs/shack/prometheus/node.nix new file mode 100644 index 000000000..5462464d5 --- /dev/null +++ b/krebs/2configs/shack/prometheus/node.nix @@ -0,0 +1,27 @@ +{ config, lib, pkgs, ... }: +{ + networking.firewall.allowedTCPPorts = [ 9100 ]; + + services.prometheus.exporters.node = { + enable = true; + enabledCollectors = [ + "conntrack" + "diskstats" + "entropy" + "filefd" + "filesystem" + "loadavg" + "mdadm" + "meminfo" + "netdev" + "netstat" + "stat" + "time" + "vmstat" + "systemd" + "logind" + "interrupts" + "ksmd" + ]; + }; +} diff --git a/krebs/2configs/shack/prometheus/server.nix b/krebs/2configs/shack/prometheus/server.nix new file mode 100644 index 000000000..c936f2531 --- /dev/null +++ b/krebs/2configs/shack/prometheus/server.nix @@ -0,0 +1,195 @@ +{ pkgs, lib, config, ... }: +# from https://gist.github.com/globin/02496fd10a96a36f092a8e7ea0e6c7dd +{ + networking = { + firewall.allowedTCPPorts = [ + 3000 # grafana + 9090 # prometheus + 9093 # alertmanager + ]; + useDHCP = true; + }; + + services = { + prometheus = { + enable = true; + extraFlags = [ + "-storage.local.retention 8760h" + "-storage.local.series-file-shrink-ratio 0.3" + "-storage.local.memory-chunks 2097152" + "-storage.local.max-chunks-to-persist 1048576" + "-storage.local.index-cache-size.fingerprint-to-metric 2097152" + "-storage.local.index-cache-size.fingerprint-to-timerange 1048576" + "-storage.local.index-cache-size.label-name-to-label-values 2097152" + "-storage.local.index-cache-size.label-pair-to-fingerprints 41943040" + ]; + alertmanagerURL = [ "http://localhost:9093" ]; + rules = [ + '' + ALERT node_down + IF up == 0 + FOR 5m + LABELS { + severity="page" + } + ANNOTATIONS { + summary = "{{$labels.alias}}: Node is down.", + description = "{{$labels.alias}} has been down for more than 5 minutes." + } + ALERT node_systemd_service_failed + IF node_systemd_unit_state{state="failed"} == 1 + FOR 4m + LABELS { + severity="page" + } + ANNOTATIONS { + summary = "{{$labels.alias}}: Service {{$labels.name}} failed to start.", + description = "{{$labels.alias}} failed to (re)start service {{$labels.name}}." + } + ALERT node_filesystem_full_90percent + IF sort(node_filesystem_free{device!="ramfs"} < node_filesystem_size{device!="ramfs"} * 0.1) / 1024^3 + FOR 5m + LABELS { + severity="page" + } + ANNOTATIONS { + summary = "{{$labels.alias}}: Filesystem is running out of space soon.", + description = "{{$labels.alias}} device {{$labels.device}} on {{$labels.mountpoint}} got less than 10% space left on its filesystem." + } + ALERT node_filesystem_full_in_4h + IF predict_linear(node_filesystem_free{device!="ramfs"}[1h], 4*3600) <= 0 + FOR 5m + LABELS { + severity="page" + } + ANNOTATIONS { + summary = "{{$labels.alias}}: Filesystem is running out of space in 4 hours.", + description = "{{$labels.alias}} device {{$labels.device}} on {{$labels.mountpoint}} is running out of space of in approx. 4 hours" + } + ALERT node_filedescriptors_full_in_3h + IF predict_linear(node_filefd_allocated[1h], 3*3600) >= node_filefd_maximum + FOR 20m + LABELS { + severity="page" + } + ANNOTATIONS { + 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" + } + ALERT node_load1_90percent + IF node_load1 / on(alias) count(node_cpu{mode="system"}) by (alias) >= 0.9 + FOR 1h + LABELS { + severity="page" + } + ANNOTATIONS { + summary = "{{$labels.alias}}: Running on high load.", + description = "{{$labels.alias}} is running with > 90% total load for at least 1h." + } + ALERT node_cpu_util_90percent + IF 100 - (avg by (alias) (irate(node_cpu{mode="idle"}[5m])) * 100) >= 90 + FOR 1h + LABELS { + severity="page" + } + ANNOTATIONS { + summary = "{{$labels.alias}}: High CPU utilization.", + description = "{{$labels.alias}} has total CPU utilization over 90% for at least 1h." + } + ALERT node_ram_using_90percent + IF node_memory_MemFree + node_memory_Buffers + node_memory_Cached < node_memory_MemTotal * 0.1 + FOR 30m + LABELS { + severity="page" + } + ANNOTATIONS { + summary="{{$labels.alias}}: Using lots of RAM.", + description="{{$labels.alias}} is using at least 90% of its RAM for at least 30 minutes now.", + } + '' + ]; + scrapeConfigs = [ + { + job_name = "node"; + scrape_interval = "10s"; + static_configs = [ + { + targets = [ + "localhost:9100" + ]; + labels = { + alias = "wolf.shack"; + }; + } + { + targets = [ + "localhost:9130" + ]; + labels = { + alias = "unifi.shack"; + }; + } + { + targets = [ + "10.42.22.184:9100" # puyak.shack + ]; + labels = { + alias = "puyak.shack"; + }; + } + { + targets = [ + "phenylbutazon.shack:9100" + ]; + labels = { + alias = "phenylbutazon.shack"; + }; + } + { + targets = [ + "ibuprofen.shack:9100" + ]; + labels = { + alias = "ibuprofen.shack"; + }; + } + ]; + } + ]; + alertmanager = { + enable = true; + listenAddress = "0.0.0.0"; + configuration = { + "global" = { + "smtp_smarthost" = "smtp.example.com:587"; + "smtp_from" = "alertmanager@example.com"; + }; + "route" = { + "group_by" = [ "alertname" "alias" ]; + "group_wait" = "30s"; + "group_interval" = "2m"; + "repeat_interval" = "4h"; + "receiver" = "team-admins"; + }; + "receivers" = [ + { + "name" = "team-admins"; + "email_configs" = [ + { + "to" = "devnull@example.com"; + "send_resolved" = true; + } + ]; + "webhook_configs" = [ + { + "url" = "https://example.com/prometheus-alerts"; + "send_resolved" = true; + } + ]; + } + ]; + }; + }; + }; + }; +} diff --git a/krebs/2configs/shack/prometheus/unifi.nix b/krebs/2configs/shack/prometheus/unifi.nix new file mode 100644 index 000000000..401ecb024 --- /dev/null +++ b/krebs/2configs/shack/prometheus/unifi.nix @@ -0,0 +1,10 @@ +{lib, ... }: +{ + services.prometheus.exporters.unifi = { + enable = true; + unifiAddress = "https://unifi.shack:8443/"; + unifiInsecure = true; + unifiUsername = "prometheus"; # needed manual login after setup to confirm the password + unifiPassword = lib.replaceChars ["\n"] [""] (builtins.readFile <secrets/shack/unifi-prometheus-pw>); + }; +} |