diff --git a/nixos/modules/monitoring/server/grafana-config/resources-overview.json b/nixos/modules/monitoring/server/grafana-config/resources-overview.json
new file mode 100644
index 0000000000000000000000000000000000000000..70519e5bf77c9a3dc5973e1a88ca62c7030f6018
--- /dev/null
+++ b/nixos/modules/monitoring/server/grafana-config/resources-overview.json
@@ -0,0 +1,1294 @@
+{
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+ "list": [
+ {
+ "builtIn": 1,
+ "datasource": "-- Grafana --",
+ "enable": true,
+ "hide": true,
+ "iconColor": "rgba(0, 211, 255, 1)",
+ "name": "Annotations & Alerts",
+ "type": "dashboard"
+ }
+ ]
+ },
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+ "x": 0,
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+ "panels": [],
+ "title": "CPU & Memory",
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+ },
+ {
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+ "bars": false,
+ "dashLength": 10,
+ "dashes": false,
+ "datasource": null,
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+ "refId": "A"
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+ "timeRegions": [],
+ "timeShift": null,
+ "title": "Max CPU % per core per node",
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+ "sort": 0,
+ "value_type": "individual"
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+ "type": "graph",
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+ "targets": [
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+ "show": true,
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+ "show": true
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+ "dashes": false,
+ "datasource": null,
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+ },
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+ "renderer": "flot",
+ "seriesOverrides": [],
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+ "stack": false,
+ "steppedLine": false,
+ "targets": [
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+ "intervalFactor": 4,
+ "legendFormat": "{{instance}}",
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+ "thresholds": [
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+ }
+ ],
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+ },
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+ "show": true,
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+ "renderer": "flot",
+ "seriesOverrides": [],
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+ "stack": false,
+ "steppedLine": false,
+ "targets": [
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+ "intervalFactor": 4,
+ "legendFormat": "{{instance}} out",
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+ "tooltip": {
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+ "transformations": [],
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+ }
+ },
+ {
+ "aliasColors": {},
+ "bars": false,
+ "dashLength": 10,
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+ "datasource": null,
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+ "legendFormat": "{{instance}} {{device}}",
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+ "thresholds": [
+ {
+ "colorMode": "critical",
+ "fill": true,
+ "line": true,
+ "op": "gt",
+ "value": 0.8
+ }
+ ],
+ "timeFrom": null,
+ "timeRegions": [],
+ "timeShift": null,
+ "title": "Storage usage %",
+ "tooltip": {
+ "shared": true,
+ "sort": 0,
+ "value_type": "individual"
+ },
+ "transformations": [],
+ "type": "graph",
+ "xaxis": {
+ "buckets": null,
+ "mode": "time",
+ "name": null,
+ "show": true,
+ "values": []
+ },
+ "yaxes": [
+ {
+ "$$hashKey": "object:165",
+ "format": "percentunit",
+ "label": null,
+ "logBase": 1,
+ "max": "1",
+ "min": "0",
+ "show": true
+ },
+ {
+ "$$hashKey": "object:166",
+ "format": "short",
+ "label": null,
+ "logBase": 1,
+ "max": null,
+ "min": null,
+ "show": true
+ }
+ ],
+ "yaxis": {
+ "align": false,
+ "alignLevel": null
+ }
+ },
+ {
+ "aliasColors": {},
+ "bars": false,
+ "dashLength": 10,
+ "dashes": false,
+ "datasource": null,
+ "description": "Input Output Operations per second",
+ "fieldConfig": {
+ "defaults": {
+ "custom": {}
+ },
+ "overrides": []
+ },
+ "fill": 0,
+ "fillGradient": 0,
+ "gridPos": {
+ "h": 7,
+ "w": 8,
+ "x": 8,
+ "y": 17
+ },
+ "hiddenSeries": false,
+ "id": 14,
+ "legend": {
+ "avg": false,
+ "current": false,
+ "max": false,
+ "min": false,
+ "show": true,
+ "total": false,
+ "values": false
+ },
+ "lines": true,
+ "linewidth": 1,
+ "nullPointMode": "null",
+ "options": {
+ "alertThreshold": true
+ },
+ "percentage": false,
+ "pluginVersion": "7.3.5",
+ "pointradius": 2,
+ "points": false,
+ "renderer": "flot",
+ "seriesOverrides": [],
+ "spaceLength": 10,
+ "stack": false,
+ "steppedLine": false,
+ "targets": [
+ {
+ "expr": "rate(node_disk_reads_completed_total[5m]) > 0",
+ "interval": "",
+ "intervalFactor": 4,
+ "legendFormat": "{{instance}} R {{device}}",
+ "refId": "A"
+ },
+ {
+ "expr": "- (rate(node_disk_writes_completed_total[5m]) > 0)",
+ "interval": "",
+ "intervalFactor": 4,
+ "legendFormat": "{{instance}} W {{device}}",
+ "refId": "B"
+ }
+ ],
+ "thresholds": [],
+ "timeFrom": null,
+ "timeRegions": [],
+ "timeShift": null,
+ "title": "IOPS",
+ "tooltip": {
+ "shared": true,
+ "sort": 0,
+ "value_type": "individual"
+ },
+ "type": "graph",
+ "xaxis": {
+ "buckets": null,
+ "mode": "time",
+ "name": null,
+ "show": true,
+ "values": []
+ },
+ "yaxes": [
+ {
+ "$$hashKey": "object:471",
+ "format": "short",
+ "label": null,
+ "logBase": 1,
+ "max": null,
+ "min": null,
+ "show": true
+ },
+ {
+ "$$hashKey": "object:472",
+ "format": "short",
+ "label": null,
+ "logBase": 1,
+ "max": null,
+ "min": null,
+ "show": true
+ }
+ ],
+ "yaxis": {
+ "align": false,
+ "alignLevel": null
+ }
+ },
+ {
+ "aliasColors": {},
+ "bars": false,
+ "dashLength": 10,
+ "dashes": false,
+ "datasource": null,
+ "description": "Max average storage latency per node.",
+ "fieldConfig": {
+ "defaults": {
+ "custom": {}
+ },
+ "overrides": []
+ },
+ "fill": 0,
+ "fillGradient": 0,
+ "gridPos": {
+ "h": 7,
+ "w": 8,
+ "x": 16,
+ "y": 17
+ },
+ "hiddenSeries": false,
+ "id": 16,
+ "legend": {
+ "avg": false,
+ "current": false,
+ "max": false,
+ "min": false,
+ "show": true,
+ "total": false,
+ "values": false
+ },
+ "lines": true,
+ "linewidth": 1,
+ "nullPointMode": "null",
+ "options": {
+ "alertThreshold": true
+ },
+ "percentage": false,
+ "pluginVersion": "7.3.5",
+ "pointradius": 2,
+ "points": false,
+ "renderer": "flot",
+ "seriesOverrides": [],
+ "spaceLength": 10,
+ "stack": false,
+ "steppedLine": false,
+ "targets": [
+ {
+ "expr": "max by (instance, device) (rate(node_disk_read_time_seconds_total[5m]) / rate(node_disk_reads_completed_total[5m])) > 0",
+ "interval": "",
+ "intervalFactor": 4,
+ "legendFormat": "{{instance}} R {{device}}",
+ "refId": "A"
+ },
+ {
+ "expr": "- max by (instance, device) (rate(node_disk_write_time_seconds_total[5m]) / rate(node_disk_writes_completed_total[5m])) < 0",
+ "interval": "",
+ "intervalFactor": 4,
+ "legendFormat": "{{instance}} W {{device}}",
+ "refId": "B"
+ }
+ ],
+ "thresholds": [],
+ "timeFrom": null,
+ "timeRegions": [],
+ "timeShift": null,
+ "title": "Storage latency",
+ "tooltip": {
+ "shared": true,
+ "sort": 0,
+ "value_type": "individual"
+ },
+ "type": "graph",
+ "xaxis": {
+ "buckets": null,
+ "mode": "time",
+ "name": null,
+ "show": true,
+ "values": []
+ },
+ "yaxes": [
+ {
+ "$$hashKey": "object:211",
+ "format": "s",
+ "label": null,
+ "logBase": 1,
+ "max": null,
+ "min": null,
+ "show": true
+ },
+ {
+ "$$hashKey": "object:212",
+ "format": "short",
+ "label": null,
+ "logBase": 1,
+ "max": null,
+ "min": null,
+ "show": true
+ }
+ ],
+ "yaxis": {
+ "align": false,
+ "alignLevel": null
+ }
+ }
+ ],
+ "refresh": "30s",
+ "schemaVersion": 26,
+ "style": "dark",
+ "tags": [],
+ "templating": {
+ "list": []
+ },
+ "time": {
+ "from": "now-1h",
+ "to": "now"
+ },
+ "timepicker": {},
+ "timezone": "utc",
+ "title": "Resources overview",
+ "uid": "ResSatUse",
+ "version": 1
+}
\ No newline at end of file
diff --git a/nixos/modules/monitoring/server/grafana.nix b/nixos/modules/monitoring/server/grafana.nix
new file mode 100644
index 0000000000000000000000000000000000000000..3ff096209fddc46ab9a5b9a301cf4fec3ce32646
--- /dev/null
+++ b/nixos/modules/monitoring/server/grafana.nix
@@ -0,0 +1,79 @@
+# Grafana Server
+#
+# Scope: Beautiful plots of time series data retrieved from Prometheus
+# See https://christine.website/blog/prometheus-grafana-loki-nixos-2020-11-20
+
+{ config, lib, ... }:
+
+let
+ cfg = config.services.private-storage.monitoring.grafana;
+
+in {
+ options.services.private-storage.monitoring.grafana = {
+ domain = lib.mkOption
+ { type = lib.types.str;
+ example = lib.literalExample "grafana.grid.private.storage";
+ description = "The FQDN of the Grafana host";
+ };
+ prometheusUrl = lib.mkOption
+ { type = lib.types.str;
+ example = lib.literalExample "http://prometheus:9090/";
+ default = "http://prometheus:9090/";
+ description = "The URL of the Prometheus host to access";
+ };
+ lokiUrl = lib.mkOption
+ { type = lib.types.str;
+ example = lib.literalExample "http://loki:3100/";
+ default = "http://loki:3100/";
+ description = "The URL of the Loki host to access";
+ };
+ };
+
+ config = {
+ networking.firewall.allowedTCPPorts = [ 80 443 ];
+
+ services.grafana = {
+ enable = true;
+ domain = cfg.domain;
+ port = 2342;
+ addr = "127.0.0.1";
+
+ # All three are required to forego the user/pass prompt:
+ auth.anonymous.enable = true;
+ auth.anonymous.org_role = "Admin";
+ auth.anonymous.org_name = "Main Org.";
+ };
+
+ services.grafana.provision = {
+ enable = true;
+ # See https://grafana.com/docs/grafana/latest/administration/provisioning/#datasources
+ datasources = [{
+ name = "Prometheus";
+ type = "prometheus";
+ access = "proxy";
+ url = cfg.prometheusUrl;
+ isDefault = true;
+ } {
+ name = "Loki";
+ type = "loki";
+ access = "proxy";
+ url = cfg.lokiUrl;
+ }];
+ # See https://grafana.com/docs/grafana/latest/administration/provisioning/#dashboards
+ dashboards = [{
+ name = "provisioned";
+ options.path = ./grafana-config;
+ }];
+ };
+
+ # nginx reverse proxy
+ services.nginx.enable = true;
+ services.nginx.virtualHosts.${config.services.grafana.domain} = {
+ locations."/" = {
+ proxyPass = "http://127.0.0.1:${toString config.services.grafana.port}";
+ proxyWebsockets = true;
+ };
+ };
+ };
+}
+
diff --git a/nixos/modules/monitoring/server/loki.nix b/nixos/modules/monitoring/server/loki.nix
new file mode 100644
index 0000000000000000000000000000000000000000..96554523f06d0d86c620db445b2443575a1c3fd3
--- /dev/null
+++ b/nixos/modules/monitoring/server/loki.nix
@@ -0,0 +1,78 @@
+# Loki Server
+#
+# Scope: Log aggregator
+
+{
+ config.networking.firewall.allowedTCPPorts = [ 3100 ];
+
+ config.services.loki = {
+ enable = true;
+
+ configuration =
+ {
+ auth_enabled = false;
+
+ server = {
+ http_listen_port = 3100;
+ };
+
+ ingester = {
+ lifecycler = {
+ address = "0.0.0.0";
+ ring = {
+ kvstore = {
+ store = "inmemory";
+ };
+ replication_factor = 1;
+ };
+ final_sleep = "0s";
+ };
+ chunk_idle_period = "1h"; # Any chunk not receiving new logs in this time will be flushed
+ max_chunk_age = "1h"; # All chunks will be flushed when they hit this age, default is 1h
+ chunk_target_size = 1048576; # Loki will attempt to build chunks up to 1.5MB, flushing first if chunk_idle_period or max_chunk_age is reached first
+ chunk_retain_period = "30s"; # Must be greater than index read cache TTL if using an index cache (Default index read cache TTL is 5m)
+ max_transfer_retries = 0; # Chunk transfers disabled
+ };
+
+ schema_config = {
+ configs = [{
+ from = "2020-10-24"; # TODO: Should this be "today"?
+ store = "boltdb-shipper";
+ object_store = "filesystem";
+ schema = "v11";
+ index = {
+ prefix = "index_";
+ period = "24h";
+ };
+ }];
+ };
+
+ storage_config = {
+ boltdb_shipper = {
+ active_index_directory = "/var/lib/loki/boltdb-shipper-active";
+ cache_location = "/var/lib/loki/boltdb-shipper-cache";
+ cache_ttl = "24h"; # Can be increased for faster performance over longer query periods, uses more disk space
+ shared_store = "filesystem";
+ };
+ filesystem = {
+ directory = "/var/lib/loki/chunks";
+ };
+ };
+
+ limits_config = {
+ reject_old_samples = true;
+ reject_old_samples_max_age = "168h";
+ };
+
+ chunk_store_config = {
+ max_look_back_period = "336h";
+ };
+
+ table_manager = {
+ retention_deletes_enabled = true;
+ retention_period = "336h";
+ };
+ };
+ };
+}
+
diff --git a/nixos/modules/monitoring/server/prometheus.nix b/nixos/modules/monitoring/server/prometheus.nix
new file mode 100644
index 0000000000000000000000000000000000000000..cffb126ddd3a80a715799bee6037f709adf97fc2
--- /dev/null
+++ b/nixos/modules/monitoring/server/prometheus.nix
@@ -0,0 +1,49 @@
+# Prometheus server
+#
+# Scope: Pull data from our cluster machines into TSDB
+# See https://christine.website/blog/prometheus-grafana-loki-nixos-2020-11-20
+
+{ config, lib, ... }:
+let
+
+ exportersCfg = config.services.prometheus.exporters;
+ cfg = config.services.private-storage.monitoring.prometheus;
+
+in {
+ options.services.private-storage.monitoring.prometheus = {
+ nodeExporterTargets = lib.mkOption {
+ type = with lib.types; listOf str;
+ example = lib.literalExample "[ node1 node2 ]";
+ description = "List of nodes (hostnames or IPs) to scrape.";
+ };
+ nginxExporterTargets = lib.mkOption {
+ type = with lib.types; listOf str;
+ example = lib.literalExample "[ node1 node2 ]";
+ description = "List of nodes (hostnames or IPs) to scrape.";
+ };
+ };
+
+ config = rec {
+ networking.firewall.allowedTCPPorts = [ services.prometheus.port ];
+
+ services.prometheus = {
+ enable = true;
+ port = 9090; # Option only in recent (20.09?) nixpkgs, 9090 default
+ scrapeConfigs = [
+ {
+ job_name = "node-exporters";
+ static_configs = [{
+ targets = map (x: x + ":" + (toString exportersCfg.node.port)) cfg.nodeExporterTargets;
+ }];
+ }
+ {
+ job_name = "nginx-exporters";
+ static_configs = [{
+ targets = map (x: x + ":" + (toString exportersCfg.nginx.port)) cfg.nginxExporterTargets;
+ }];
+ }
+ ];
+ };
+ };
+}
+