Grafana dashboard

After enabling and configuring metrics, you can visualise them using Tarantool Grafana dashboards. These dashboards are available as part of Grafana official & community-built dashboards:

Tarantool 3	Prometheus, InfluxDB
Tarantool Cartridge and Tarantool 1.10—2.x	Prometheus, InfluxDB
Tarantool Data Grid 2	Prometheus, InfluxDB

The Tarantool Grafana dashboard is a ready for import template with basic memory, space operations, and HTTP load panels, based on default metrics package functionality.

../../../../_images/Prometheus_dashboard_1.png

../../../../_images/Prometheus_dashboard_2.png

../../../../_images/Prometheus_dashboard_3.png

Prepare a monitoring stack

Since there are Prometheus and InfluxDB data source Grafana dashboards, you can use one of the following:

Telegraf as a server agent for collecting metrics, InfluxDB as a time series database for storing metrics, and Grafana as a visualization platform.
Prometheus as both a server agent for collecting metrics and a time series database for storing metrics, and Grafana as a visualization platform.

For issues related to setting up Prometheus, Telegraf, InfluxDB, or Grafana instances, refer to the corresponding project’s documentation.

Collect metrics with server agents

Prometheus

To collect metrics for Prometheus, first set up metrics output with prometheus format. You can use the roles.metrics-export configuration or set up the Prometheus plugin manually. To start collecting metrics, add a job to Prometheus configuration with each Tarantool instance URI as a target and metrics path as it was configured on Tarantool instances:

global:
  scrape_interval:     5s
  evaluation_interval: 5s

scrape_configs:
  - job_name: prometheus
    static_configs:
      - targets:
          - 127.0.0.1:8081
          - 127.0.0.1:8082
          - 127.0.0.1:8083
          - 127.0.0.1:8084
          - 127.0.0.1:8085
    metrics_path: "/metrics/prometheus"

InfluxDB

To collect metrics for InfluxDB, use the Telegraf agent. First off, configure Tarantool metrics output in json format with roles.metrics-export configuration or corresponding JSON plugin. To start collecting metrics, add http input to Telegraf configuration including each Tarantool instance metrics URL:

[[inputs.http]]
    urls = [
        "http://example_project:8081/metrics/json",
        "http://example_project:8082/metrics/json",
        "http://example_project:8083/metrics/json",
        "http://example_project:8084/metrics/json",
        "http://example_project:8085/metrics/json"
    ]
    timeout = "30s"
    tag_keys = [
        "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_thread",
        "label_pairs_kind"
    ]
    insecure_skip_verify = true
    interval = "10s"
    data_format = "json"
    name_prefix = "tarantool_"
    fieldpass = ["value"]

Be sure to include each label key as label_pairs_<key> to extract it with the plugin. For example, if you use { state = 'ready' } labels somewhere in metric collectors, add label_pairs_state tag key.

Import the dashboard

Open Grafana import menu.

To import a specific dashboard, choose one of the following options:

paste the dashboard id (21474 for Prometheus dashboard, 21484 for InfluxDB dashboard)
paste a link to the dashboard (https://grafana.com/grafana/dashboards/21474 for Prometheus dashboard, https://grafana.com/grafana/dashboards/21484 for InfluxDB dashboard)
paste the dashboard JSON file contents
upload the dashboard JSON file

Set dashboard name, folder and uid (if needed).

../../../../_images/grafana_import_setup.png

You can choose the data source and data source variables after import.

../../../../_images/grafana_variables_setup.png

Troubleshooting

If there are no data on the graphs, make sure that you picked datasource and job/measurement correctly.
If there are no data on the graphs, make sure that you have info group of Tarantool metrics (in particular, tnt_info_uptime).
If some Prometheus graphs show no data because of parse error: missing unit character in duration, ensure that you use Grafana 7.2 or newer.
If some Prometheus graphs display parse error: bad duration syntax "1m0" or similar error, you need to update your Prometheus version. See grafana/grafana#44542 for more details.