Dovecot icon

Dovecot

Dovecot

Plugin: go.d.plugin Module: dovecot

Overview

This collector monitors Dovecot metrics about sessions, logins, commands, page faults and more.

It reads the server’s response to the EXPORT\tglobal\n command.

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

Automatically discovers and collects Dovecot statistics from the following default locations:

  • localhost:24242
  • unix:///var/run/dovecot/old-stats

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.

Setup

You can configure the dovecot collector in two ways:

Method Best for How to
UI Fast setup without editing files Go to Nodes → Configure this node → Collectors → Jobs, search for dovecot, then click + to add a job.
File If you prefer configuring via file, or need to automate deployments (e.g., with Ansible) Edit go.d/dovecot.conf and add a job.

:::important

UI configuration requires paid Netdata Cloud plan.

:::

Prerequisites

Enable old_stats plugin

To enable old_stats plugin, see Old Statistics.

Configuration

Options

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

Group Option Description Default Required
Collection update_every Data collection interval (seconds). 1 no
autodetection_retry Autodetection retry interval (seconds). Set 0 to disable. 0 no
Target address Dovecot socket address (Unix or TCP). Used by the old_stats plugin. 127.0.0.1:24242 yes
timeout Connection, read, write, and name resolution timeout (seconds). 1 no
Virtual Node vnode Associates this data collection job with a Virtual Node. no

via UI

Configure the dovecot collector from the Netdata web interface:

  1. Go to Nodes.
  2. Select the node where you want the dovecot data-collection job to run and click the :gear: (Configure this node). That node will run the data collection.
  3. The Collectors → Jobs view opens by default.
  4. In the Search box, type dovecot (or scroll the list) to locate the dovecot collector.
  5. Click the + next to the dovecot collector to add a new job.
  6. Fill in the job fields, then click Test to verify the configuration and Submit to save.
    • Test runs the job with the provided settings and shows whether data can be collected.
    • If it fails, an error message appears with details (for example, connection refused, timeout, or command execution errors), so you can adjust and retest.

via File

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

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

update_every: 1
autodetection_retry: 0
jobs:
  - name: some_name1
  - name: some_name2

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/dovecot.conf
Examples
Basic (TCP)

A basic example configuration.

jobs:
  - name: local
    address: 127.0.0.1:24242
Basic (UNIX)

A basic example configuration using a UNIX socket.

jobs:
  - name: local
    address: unix:///var/run/dovecot/old-stats
Multi-instance

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

Collecting metrics from local and remote instances.

jobs:
  - name: local
    address: 127.0.0.1:24242

  - name: remote
    address: 203.0.113.0:24242

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 Dovecot instance

These metrics refer to the entire monitored application.

This scope has no labels.

Metrics:

Metric Dimensions Unit
dovecot.session active sessions
dovecot.logins logins logins
dovecot.auth ok, failed attempts/s
dovecot.commands commands commands
dovecot.context_switches voluntary, voluntary switches/s
dovecot.io read, write KiB/s
dovecot.net read, write kilobits/s
dovecot.syscalls read, write syscalls/s
dovecot.lookup path, attr lookups/s
dovecot.cache hits hits/s
dovecot.auth_cache hits, misses requests/s

Alerts

There are no alerts configured by default for this integration.

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 dovecot 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 dovecot

    To debug a specific job:

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

Getting Logs

If you’re encountering problems with the dovecot 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 dovecot

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 dovecot /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 dovecot

The observability platform companies need to succeed

Sign up for free

Want a personalised demo of Netdata for your use case?

Book a Demo