diff options
| -rwxr-xr-x | host/Spacebar-monitoring/configuration.nix | 223 | ||||
| -rwxr-xr-x | host/Spacebar-nginx/hosts/spacebar.chat/grafana.nix | 14 |
2 files changed, 237 insertions, 0 deletions
diff --git a/host/Spacebar-monitoring/configuration.nix b/host/Spacebar-monitoring/configuration.nix new file mode 100755 index 0000000..c73b94f --- /dev/null +++ b/host/Spacebar-monitoring/configuration.nix @@ -0,0 +1,223 @@ +{ config, pkgs, lib, ... }: + +{ + imports = + [ + ../../modules/base.nix + ]; + + networking = { + hostName = "Spacebar-monitoring"; + interfaces.ens18.ipv4.addresses = [ { + address = "192.168.1.99"; + prefixLength = 24; + } ]; + interfaces.ens19.ipv4.addresses = [ { + address = "10.10.11.99"; + prefixLength = 16; + } ]; + }; + + services = { + prometheus = { + enable = true; + stateDir = "prometheus"; + 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.", + } + ALERT node_swap_using_80percent + IF node_memory_SwapTotal - (node_memory_SwapFree + node_memory_SwapCached) > node_memory_SwapTotal * 0.8 + FOR 10m + LABELS { + severity="page" + } + ANNOTATIONS { + summary="{{$labels.alias}}: Running out of swap soon.", + description="{{$labels.alias}} is using 80% of its swap space for at least 10 minutes now." + } + '' + ]; + scrapeConfigs = [ + { + job_name = "node"; + scrape_interval = "5s"; + static_configs = [ + { + targets = [ + "localhost:9100" + ]; + labels = { + alias = "monitoring"; + }; + } + { + targets = [ + "192.168.1.2:9100" + ]; + labels = { + alias = "nginx"; + }; + } + { + targets = [ + "192.168.1.3:9100" + ]; + labels = { + alias = "email"; + }; + } + { + targets = [ + "192.168.1.4:9100" + ]; + labels = { + alias = "postgres"; + }; + } + # { + # targets = [ + # "192.168.1.5:9100" + # ]; + # labels = { + # alias = "synapse"; + # }; + # } + ]; + } + ]; + alertmanager = { + enable = false; + 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; + } + ]; + } + ]; + }; + }; + }; + grafana = { + enable = true; + addr = "0.0.0.0"; + domain = "grafana.spacebar.chat"; + rootUrl = "https://grafana.spacebar.chat/"; + }; + }; + + system.stateVersion = "22.11"; # DO NOT EDIT! +} + diff --git a/host/Spacebar-nginx/hosts/spacebar.chat/grafana.nix b/host/Spacebar-nginx/hosts/spacebar.chat/grafana.nix new file mode 100755 index 0000000..9aad5f5 --- /dev/null +++ b/host/Spacebar-nginx/hosts/spacebar.chat/grafana.nix @@ -0,0 +1,14 @@ +{ + enableACME = true; + forceSSL = true; + locations = { + "/" = { + proxyPass = "http://192.168.99:3000"; + proxyWebsockets = true; + extraConfig = + "proxy_ssl_server_name on;" + + "proxy_pass_header Authorization;" + ; + }; + }; +} |