RethinkDB

Plugin: go.d.plugin Module: rethinkdb

Overview

It collects cluster-wide metrics such as server status, client connections, active clients, query rate, and document read/write rates. For each server, it offers similar metrics.

The data is gathered by querying the stats table in RethinkDB, which stores real-time statistics related to the cluster and its individual servers.

This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.

Default Behavior

Auto-Detection

If no configuration is given, collector will attempt to connect to RethinkDB instance on 127.0.0.1:28015 address.

Limits

The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.

Metrics

Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

Per RethinkDB instance

These metrics refer to the entire monitored application.

This scope has no labels.

Metrics:

Metric	Dimensions	Unit
rethinkdb.cluster_servers_stats_request	success, timeout	servers
rethinkdb.cluster_client_connections	connections	connections
rethinkdb.cluster_active_clients	active	clients
rethinkdb.cluster_queries	queries	queries/s
rethinkdb.cluster_documents	read, written	documents/s

Per server

These metrics refer to the server (cluster member).

Labels:

Label	Description
server_uuid	Server UUID.
server_name	Server name.

Metrics:

Metric	Dimensions	Unit
rethinkdb.server_stats_request_status	success, timeout	status
rethinkdb.server_client_connections	connections	connections
rethinkdb.server_active_clients	active	clients
rethinkdb.server_queries	queries	queries/s
rethinkdb.server_documents	read, written	documents/s

Alerts

There are no alerts configured by default for this integration.

Setup

Prerequisites

No action required.

Configuration

File

The configuration file name for this integration is go.d/rethinkdb.conf.

The file format is YAML. Generally, the structure is:

update_every: 1
autodetection_retry: 0
jobs:
  - name: some_name1
  - name: some_name1

You can edit the configuration file using the edit-config script from the Netdata config directory.

cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config go.d/rethinkdb.conf

Options

The following options can be defined globally: update_every, autodetection_retry.

Config options

Name	Description	Default	Required
update_every	Data collection frequency.	1	no
autodetection_retry	Recheck interval in seconds. Zero means no recheck will be scheduled.	0	no
address	The IP address and port where the RethinkDB service listens for connections.	127.0.0.1:28015	yes
timeout	Connection, read, and write timeout duration in seconds. The timeout includes name resolution.	1	no
username	Username used for authentication.		no
password	Password used for authentication.		no

Examples

Basic

A basic example configuration.

Config

jobs:
  - name: local
    address: 127.0.0.1:28015

With authentication

An example configuration with authentication.

Config

jobs:
  - name: local
    address: 127.0.0.1:28015
    username: name
    password: pass

Multi-instance

Note: When you define multiple jobs, their names must be unique.

Collecting metrics from local and remote instances.

Config

jobs:
  - name: local
    address: 127.0.0.1:28015

  - name: remote
    address: 203.0.113.0:28015

Troubleshooting

Debug Mode

Important: Debug mode is not supported for data collection jobs created via the UI using the Dyncfg feature.

To troubleshoot issues with the rethinkdb collector, run the go.d.plugin with the debug option enabled. The output should give you clues as to why the collector isn't working.

• Navigate to the plugins.d directory, usually at /usr/libexec/netdata/plugins.d/. If that's not the case on your system, open netdata.conf and look for the plugins setting under [directories].

  cd /usr/libexec/netdata/plugins.d/

• Switch to the netdata user.

  sudo -u netdata -s

• Run the go.d.plugin to debug the collector:

  ./go.d.plugin -d -m rethinkdb

  To debug a specific job:

  ./go.d.plugin -d -m rethinkdb -j jobName

Getting Logs

If you're encountering problems with the rethinkdb collector, follow these steps to retrieve logs and identify potential issues:

• Run the command specific to your system (systemd, non-systemd, or Docker container).
• Examine the output for any warnings or error messages that might indicate issues. These messages should provide clues about the root cause of the problem.

System with systemd

Use the following command to view logs generated since the last Netdata service restart:

journalctl _SYSTEMD_INVOCATION_ID="$(systemctl show --value --property=InvocationID netdata)" --namespace=netdata --grep rethinkdb

System without systemd

Locate the collector log file, typically at /var/log/netdata/collector.log, and use grep to filter for collector's name:

grep rethinkdb /var/log/netdata/collector.log

Note: This method shows logs from all restarts. Focus on the latest entries for troubleshooting current issues.

Docker Container

If your Netdata runs in a Docker container named "netdata" (replace if different), use this command:

docker logs netdata 2>&1 | grep rethinkdb