Grafana dashboard: Tarantool Data Grid dashboard
Description: Dashboard for Tarantool Data Grid ver. 2 application monitoring, based on grafonnet library.

# About project
This dashboard is based on [grafonnet](https://github.com/grafana/grafonnet-lib) library. Sources are available in project's [GitHub page](https://github.com/tarantool/grafana-dashboard).

# Configuration
The dashboard is designed to work with *TDG* + *Telegraf* + *InfluxDB* + *Grafana* cluster.

## TDG configuration
The dashboard is designed to work with [Tarantool Data Grid (ver. 2)](https://www.tarantool.io/en/datagrid/) cluster.

TDG must be configured to have a *json* metrics endpoint for Telegraf (refer to _cartridge.roles.metrics_ role [page](https://www.tarantool.io/en/doc/latest/book/monitoring/getting_started/#cartridge-role) for instructions).

## Telegraf configuration

Telegraf must be configured to have `data_format` set as *"json"* and `fieldpass` list set as *["value"]*; `tag_keys` list must contain *"metric_name"*, *"label_pairs_alias"*, *"label_pairs_quantile"*, *"label_pairs_path"*, *"label_pairs_method"*, *"label_pairs_status"*, *"label_pairs_operation"*, *"label_pairs_level"*, *"label_pairs_id"*, *"label_pairs_engine"*, *"label_pairs_name"*, *"label_pairs_index_name"*, *"label_pairs_delta"*, *"label_pairs_stream"*, *"label_pairs_type"*, *"label_pairs_connector_name"*,  *"label_pairs_broker_name"*, *"label_pairs_topic"*, *"label_pairs_request"*, *"label_pairs_kind"*, *"label_pairs_thread_name"*, *"label_pairs_type_name"*, *"label_pairs_operation_name"*, *"label_pairs_schema"*, *"label_pairs_entity"*, *"label_pairs_status_code"* values. You can also check out example config on [GitHub](https://github.com/tarantool/grafana-dashboard/blob/master/example_cluster/telegraf/telegraf.tfg.conf).

# Dashboard
Metrics used in dashboard are based on Tarantool [metrics](https://github.com/tarantool/metrics) module and TDG metrics.
Time series are grouped by *alias* parameter, so you can use this dashboard to monitor a cluster of Tarantool instances.

Dashboard contains the following sections:
* Cluster overview
* Replication overview
* Tarantool network activity
* Tarantool memtx allocation overview
* Tarantool MVCC overview
* Tarantool vinyl statistics
* Tarantool CPU statistics
* Tarantool runtime overview
* Tarantool LuaJit statistics
* Tarantool operations statistics
* TDG Kafka common statistics
* TDG Kafka brokers statistics
* TDG Kafka topics statistics
* TDG Kafka consumer statistics
* TDG Kafka producer statistics
* TDG expirationd statistics
* TDG tuples statistics
* TDG file connectors statistics
* TDG GraphQL requests
* TDG IProto requests
* TDG REST API requests
* TDG tasks statistics

## Cluster overview
Contains panels on [Cartridge issues](https://www.tarantool.io/en/doc/latest/book/cartridge/cartridge_api/modules/cartridge.issues/) count, read only status and switchover triggers, election info.

## Replication overview
Contains info about replication lag and status, clock delta and synchronous queue statistics.

## Tarantool network activity
Overview of instances network activity. Displays input and output data load, as well as network connections, detailed requests stats and memory consumption.

## Tarantool memtx allocation overview
Overview of Tarantool memtx memory allocation (tuples and indexes). Contains short instruction on memory allocation monitoring. You can read more about *slab* [here](https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_slab/#lua-function.box.slab.info).

## Tarantool MVCC overview
Contains statistics of Tarantool memtx engine transactions manager.

## Tarantool vinyl statistics
Overview of Tarantool vinyl memory and disk allocation, vinyl scheduler process and transaction statistics. You can read more about *vinyl engine* [here](https://www.tarantool.io/en/doc/latest/reference/reference_lua/box_slab/#lua-function.box.slab.info).

## Tarantool CPU statistics
Contains CPU process time statistics for each instance and separate thread load.

## Tarantool runtime overview
Metrics related to runtime. Contains Lua and transaction memory panels, fiber statistics panels and event loop panel.

## Tarantool LuaJit statistics
Detailed Lua runtime overview. Contains panels about objects allocation and garbage collect, memory consumption and LuaJit traces info.

## Tarantool operations statistics
Overview of operations on Tarantool spaces (select, update, etc.) aggregated over all Tarantool spaces, as well as other operations activity (eval, call, auth, errors and SQL calls).

## TDG Kafka common statistics
TDG Kafka connector common statistics. See [librdkafka "top-level" statistics section](https://github.com/edenhill/librdkafka/blob/2aadc45974d32b7c7ff91805588be3fc9951f4ad/STATISTICS.md#top-level) for details.

## TDG Kafka brokers statistics
TDG Kafka connector brokers statistics. See [librdkafka "brokers" statistics section](https://github.com/edenhill/librdkafka/blob/2aadc45974d32b7c7ff91805588be3fc9951f4ad/STATISTICS.md#brokers) for details.

## TDG Kafka topics statistics
TDG Kafka connector topics statistics. See [librdkafka "topics" statistics section](https://github.com/edenhill/librdkafka/blob/2aadc45974d32b7c7ff91805588be3fc9951f4ad/STATISTICS.md#topics) for details.

## TDG Kafka consumer statistics
TDG Kafka connector consumer statistics. See [librdkafka "cgrp" statistics section](https://github.com/edenhill/librdkafka/blob/2aadc45974d32b7c7ff91805588be3fc9951f4ad/STATISTICS.md#cgrp) for details.

## TDG Kafka producer statistics
TDG Kafka connector producer statistics. See [librdkafka "eos" statistics section](https://github.com/edenhill/librdkafka/blob/2aadc45974d32b7c7ff91805588be3fc9951f4ad/STATISTICS.md#eos) for details.

## TDG expirationd statistics
TDG [expirationd](https://github.com/tarantool/expirationd) module statistics.

## TDG tuples statistics
Tuple find operations statistics.

## TDG file connectors statistics
File connectors overall and current process statistics.

## TDG GraphQL requests
TDG API GraphQL requests statistics.

## TDG IProto requests
TDG API IProto net.box calls statistics.

## TDG REST API requests
TDG REST API requests statistics.

## TDG tasks statistics
TDG tasks, jobs and system tasks statistics.

# Contributing
Project is open-sourced, so you can freely file an issue with suggestion or bug report to our [GitHub page](https://github.com/tarantool/grafana-dashboard).

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              "query": "SELECT mean(\"tdg_system_tasks_execution_time_sum\") / mean(\"tdg_system_tasks_execution_time_count\")\nas \"average\" FROM\n(SELECT \"value\" as \"tdg_system_tasks_execution_time_sum\" FROM \"$policy\".\"$measurement\"\nWHERE (\"metric_name\" = 'tdg_system_tasks_execution_time_sum' AND \"label_pairs_alias\" =~ /^$alias$/)\nAND $timeFilter),\n(SELECT \"value\" as \"tdg_system_tasks_execution_time_count\" FROM \"$policy\".\"$measurement\"\nWHERE (\"metric_name\" = 'tdg_system_tasks_execution_time_count' AND \"label_pairs_alias\" =~ /^$alias$/)\nAND $timeFilter)\nGROUP BY time($__interval), \"label_pairs_alias\", \"label_pairs_name\",\n\"label_pairs_kind\" fill(null)\n",
              "rawQuery": true,
              "refId": "A",
              "resultFormat": "time_series",
              "select": [],
              "tags": []
            }
          ],
          "thresholds": [],
          "timeFrom": null,
          "timeShift": null,
          "title": "Tasks execution time",
          "tooltip": {
            "shared": true,
            "sort": 2,
            "value_type": "individual"
          },
          "type": "graph",
          "xaxis": {
            "buckets": null,
            "mode": "time",
            "name": null,
            "show": true,
            "values": []
          },
          "yaxes": [
            {
              "format": "s",
              "label": "average",
              "logBase": 1,
              "max": null,
              "min": null,
              "show": true
            },
            {
              "format": "s",
              "label": null,
              "logBase": 1,
              "max": null,
              "min": null,
              "show": true
            }
          ]
        }
      ],
      "repeat": null,
      "repeatIteration": null,
      "repeatRowId": null,
      "showTitle": true,
      "title": "TDG tasks statistics",
      "titleSize": "h6",
      "type": "row"
    }
  ],
  "refresh": "30s",
  "rows": [],
  "schemaVersion": 21,
  "style": "dark",
  "tags": [
    "tarantool",
    "TDG"
  ],
  "templating": {
    "list": [
      {
        "current": {},
        "hide": 0,
        "label": "Datasource",
        "name": "influxdb",
        "options": [],
        "query": "influxdb",
        "refresh": 1,
        "regex": "",
        "type": "datasource"
      },
      {
        "allValue": null,
        "current": {},
        "datasource": "$influxdb",
        "hide": 0,
        "includeAll": false,
        "label": "Retention policy",
        "multi": false,
        "name": "policy",
        "options": [],
        "query": "SHOW RETENTION POLICIES",
        "refresh": 1,
        "regex": "",
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      },
      {
        "allValue": null,
        "current": {},
        "datasource": "$influxdb",
        "hide": 0,
        "includeAll": false,
        "label": "Measurement",
        "multi": false,
        "name": "measurement",
        "options": [],
        "query": "SHOW MEASUREMENTS WHERE \"metric_name\"='tnt_info_uptime'",
        "refresh": 1,
        "regex": "",
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      },
      {
        "allValue": null,
        "current": {
          "text": "all",
          "value": "$__all"
        },
        "datasource": "$influxdb",
        "hide": 0,
        "includeAll": true,
        "label": "Instances",
        "multi": true,
        "name": "alias",
        "options": [],
        "query": "SHOW TAG VALUES FROM \"$policy\".\"$measurement\" WITH KEY=\"label_pairs_alias\"",
        "refresh": 2,
        "regex": "",
        "sort": 0,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      }
    ]
  },
  "time": {
    "from": "now-3h",
    "to": "now"
  },
  "timepicker": {
    "refresh_intervals": [
      "5s",
      "10s",
      "30s",
      "1m",
      "5m",
      "15m",
      "30m",
      "1h",
      "2h",
      "1d"
    ],
    "time_options": [
      "5m",
      "15m",
      "1h",
      "6h",
      "12h",
      "24h",
      "2d",
      "7d",
      "30d"
    ]
  },
  "timezone": "browser",
  "title": "Tarantool Data Grid dashboard",
  "version": 0
}