Add dashboard for Loki metrics

Change-Id: I220d90d33be3ed292402f3adb7386953cad7b0de
diff --git a/dashboards/loki-overview.json b/dashboards/loki-overview.json
new file mode 100644
index 0000000..050e59a
--- /dev/null
+++ b/dashboards/loki-overview.json
@@ -0,0 +1,1903 @@
+{
+  "annotations": {
+    "list": [
+      {
+        "$$hashKey": "object:386",
+        "builtIn": 1,
+        "datasource": "-- Grafana --",
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "description": "Loki metrics.",
+  "editable": true,
+  "gnetId": 10880,
+  "graphTooltip": 0,
+  "links": [],
+  "panels": [
+    {
+      "collapsed": false,
+      "datasource": null,
+      "gridPos": {
+        "h": 1,
+        "w": 24,
+        "x": 0,
+        "y": 0
+      },
+      "id": 30,
+      "panels": [],
+      "title": "",
+      "type": "row"
+    },
+    {
+      "cacheTimeout": null,
+      "columns": [],
+      "datasource": "Prometheus",
+      "fontSize": "100%",
+      "gridPos": {
+        "h": 5,
+        "w": 24,
+        "x": 0,
+        "y": 1
+      },
+      "id": 10,
+      "links": [],
+      "pageSize": null,
+      "scroll": true,
+      "showHeader": true,
+      "sort": {
+        "col": 3,
+        "desc": false
+      },
+      "styles": [
+        {
+          "$$hashKey": "object:832",
+          "alias": "",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "mappingType": 1,
+          "pattern": "Time",
+          "thresholds": [],
+          "type": "hidden",
+          "unit": "short"
+        },
+        {
+          "$$hashKey": "object:833",
+          "alias": "Loki instance",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "link": false,
+          "linkTargetBlank": true,
+          "linkTooltip": "Link to the prometheus instance",
+          "linkUrl": "${__cell:raw}/graph",
+          "mappingType": 1,
+          "pattern": "instance",
+          "thresholds": [],
+          "type": "string",
+          "unit": "short"
+        },
+        {
+          "$$hashKey": "object:834",
+          "alias": "Uptime",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "mappingType": 1,
+          "pattern": "Value #A",
+          "thresholds": [],
+          "type": "number",
+          "unit": "s"
+        },
+        {
+          "$$hashKey": "object:835",
+          "alias": "",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "link": false,
+          "mappingType": 1,
+          "pattern": "__name__",
+          "thresholds": [],
+          "type": "hidden",
+          "unit": "short"
+        },
+        {
+          "$$hashKey": "object:836",
+          "alias": "Build  git branch",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "link": true,
+          "linkTargetBlank": true,
+          "linkTooltip": "Link to git branch of a build",
+          "linkUrl": "https://github.com/grafana/loki/tree/${__cell}",
+          "mappingType": 1,
+          "pattern": "branch",
+          "thresholds": [],
+          "type": "string",
+          "unit": "short"
+        },
+        {
+          "$$hashKey": "object:837",
+          "alias": "",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "mappingType": 1,
+          "pattern": "Value #B",
+          "thresholds": [],
+          "type": "hidden",
+          "unit": "short"
+        },
+        {
+          "$$hashKey": "object:838",
+          "alias": "Loki version",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "link": true,
+          "linkTargetBlank": true,
+          "linkTooltip": "Loki release page",
+          "linkUrl": "https://github.com/grafana/loki/releases/tag/${__cell}",
+          "mappingType": 1,
+          "pattern": "version",
+          "thresholds": [],
+          "type": "string",
+          "unit": "short"
+        },
+        {
+          "$$hashKey": "object:839",
+          "alias": "Go version",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "link": true,
+          "linkTargetBlank": true,
+          "linkTooltip": "Go release page",
+          "linkUrl": "https://github.com/golang/go/releases/tag/${__cell}",
+          "mappingType": 1,
+          "pattern": "goversion",
+          "thresholds": [],
+          "type": "string",
+          "unit": "short"
+        },
+        {
+          "$$hashKey": "object:840",
+          "alias": "Build  git revision",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "link": true,
+          "linkTargetBlank": true,
+          "linkTooltip": "Link to git commit of a build",
+          "linkUrl": "https://github.com/grafana/loki/commit/${__cell}",
+          "mappingType": 1,
+          "pattern": "revision",
+          "thresholds": [],
+          "type": "string",
+          "unit": "short"
+        },
+        {
+          "$$hashKey": "object:841",
+          "alias": "",
+          "align": "auto",
+          "colorMode": null,
+          "colors": [
+            "rgba(245, 54, 54, 0.9)",
+            "rgba(237, 129, 40, 0.89)",
+            "rgba(50, 172, 45, 0.97)"
+          ],
+          "dateFormat": "YYYY-MM-DD HH:mm:ss",
+          "decimals": 2,
+          "mappingType": 1,
+          "pattern": "job",
+          "thresholds": [],
+          "type": "hidden",
+          "unit": "short"
+        }
+      ],
+      "targets": [
+        {
+          "expr": "max(time() - process_start_time_seconds{job=\"loki\"}) by (instance)",
+          "format": "table",
+          "instant": true,
+          "interval": "",
+          "legendFormat": "",
+          "refId": "A"
+        },
+        {
+          "expr": "max(loki_build_info{job=\"loki\"}) by (instance, branch, goversion, version, revision)",
+          "format": "table",
+          "instant": true,
+          "interval": "",
+          "legendFormat": "",
+          "refId": "B"
+        }
+      ],
+      "title": "Build, uptime and runtime instance info",
+      "transform": "table",
+      "type": "table"
+    },
+    {
+      "aliasColors": {},
+      "bars": true,
+      "dashLength": 10,
+      "dashes": false,
+      "datasource": null,
+      "fill": 1,
+      "fillGradient": 0,
+      "gridPos": {
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+        "w": 24,
+        "x": 0,
+        "y": 6
+      },
+      "hiddenSeries": false,
+      "id": 12,
+      "legend": {
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+        "current": false,
+        "max": false,
+        "min": false,
+        "show": false,
+        "total": false,
+        "values": false
+      },
+      "lines": false,
+      "linewidth": 1,
+      "nullPointMode": "null",
+      "options": {
+        "dataLinks": []
+      },
+      "percentage": false,
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [
+        {
+          "$$hashKey": "object:1640",
+          "alias": "Number of errors",
+          "color": "#C4162A"
+        }
+      ],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "expr": "increase(log_messages_total{level=\"error\"}[5m])",
+          "interval": "",
+          "legendFormat": "Number of errors",
+          "refId": "A"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Number of Loki errors per 5m",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
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+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
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+          "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,
+      "fill": 1,
+      "fillGradient": 0,
+      "gridPos": {
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+      },
+      "hiddenSeries": false,
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+      "interval": "",
+      "legend": {
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+        "current": false,
+        "max": false,
+        "min": false,
+        "show": false,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 1,
+      "nullPointMode": "null",
+      "options": {
+        "dataLinks": []
+      },
+      "percentage": false,
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "expr": "avg_over_time(loki_ingester_chunk_entries_count[5m])",
+          "refId": "A"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Loki's stored chunk entries",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
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+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
+          "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,
+      "fill": 1,
+      "fillGradient": 0,
+      "gridPos": {
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+        "w": 8,
+        "x": 8,
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+      },
+      "hiddenSeries": false,
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+      "legend": {
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+        "current": false,
+        "max": false,
+        "min": false,
+        "show": false,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 1,
+      "nullPointMode": "null",
+      "options": {
+        "dataLinks": []
+      },
+      "percentage": false,
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "expr": "rate(loki_distributor_lines_received_total{job=\"loki\"}[5m])",
+          "interval": "",
+          "legendFormat": "lines/sec",
+          "refId": "A"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Log lines per second",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
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+          "$$hashKey": "object:2387",
+          "format": "cps",
+          "label": "lines/sec",
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
+          "$$hashKey": "object:2388",
+          "format": "KBs",
+          "label": "",
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": false
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+      ],
+      "yaxis": {
+        "align": false,
+        "alignLevel": null
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+    {
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+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "expr": "rate(loki_distributor_bytes_received_total{job=\"loki\"}[5m]) / 1024",
+          "interval": "",
+          "legendFormat": "kb/sec",
+          "refId": "A"
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+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Log line data per second",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
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+      "type": "graph",
+      "xaxis": {
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+        "mode": "time",
+        "name": null,
+        "show": true,
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+          "logBase": 1,
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+      "lines": true,
+      "linewidth": 1,
+      "nullPointMode": "null",
+      "options": {
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+      "percentage": false,
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [
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+          "alias": "4xx",
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+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
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+          "interval": "",
+          "legendFormat": "{{status}}",
+          "refId": "A"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Pushes per second",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
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+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
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+          "format": "reqps",
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+          "logBase": 1,
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+          "min": null,
+          "show": true
+        },
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+          "format": "short",
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+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
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+      ],
+      "yaxis": {
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+        "alignLevel": null
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+    {
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+      "points": false,
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+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
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+          "expr": "sum by (status) (label_replace(label_replace(rate(loki_request_duration_seconds_count{job=\"loki\", route=~\"api_prom_query|api_prom_label|api_prom_label_name_values|loki_api_v1_query|loki_api_v1_query_range|loki_api_v1_label|loki_api_v1_label_name_values\"}[5m]), \"status\", \"${1}xx\", \"status_code\", \"([0-9])..\"),\"status\", \"${1}\", \"status_code\", \"([a-z]+)\"))",
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