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HTTPD

Plugin: go.d.plugin Module: apache

Overview

This collector monitors the activity and performance of Apache servers, and collects metrics such as the number of connections, workers, requests and more.

It sends HTTP requests to the Apache location server-status, which is a built-in location that provides metrics about the Apache server.

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

By default, it detects Apache instances running on localhost that are listening on port 80. On startup, it tries to collect metrics from:

  • http://localhost/server-status?auto
  • http://127.0.0.1/server-status?auto

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

Prerequisites

Enable Apache status support

Configuration

File

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

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/apache.conf

Options

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

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
url Server URL. http://127.0.0.1/server-status?auto yes
timeout HTTP request timeout. 1 no
username Username for basic HTTP authentication. no
password Password for basic HTTP authentication. no
proxy_url Proxy URL. no
proxy_username Username for proxy basic HTTP authentication. no
proxy_password Password for proxy basic HTTP authentication. no
method HTTP request method. GET no
body HTTP request body. no
headers HTTP request headers. no
not_follow_redirects Redirect handling policy. Controls whether the client follows redirects. no no
tls_skip_verify Server certificate chain and hostname validation policy. Controls whether the client performs this check. no no
tls_ca Certification authority that the client uses when verifying the server’s certificates. no
tls_cert Client TLS certificate. no
tls_key Client TLS key. no

Examples

Basic

A basic example configuration.

jobs:
  - name: local
    url: http://127.0.0.1/server-status?auto
HTTP authentication

Basic HTTP authentication.

jobs:
  - name: local
    url: http://127.0.0.1/server-status?auto
    username: username
    password: password
HTTPS with self-signed certificate

Apache with enabled HTTPS and self-signed certificate.

jobs:
  - name: local
    url: https://127.0.0.1/server-status?auto
    tls_skip_verify: yes
Multi-instance

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

Collecting metrics from local and remote instances.

jobs:
  - name: local
    url: http://127.0.0.1/server-status?auto

  - name: remote
    url: http://192.0.2.1/server-status?auto

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.

All metrics available only if ExtendedStatus is on.

Per Apache instance

These metrics refer to the entire monitored application.

This scope has no labels.

Metrics:

Metric Dimensions Unit Basic Extended
apache.connections connections connections • •
apache.conns_async keepalive, closing, writing connections • •
apache.workers idle, busy workers • •
apache.scoreboard waiting, starting, reading, sending, keepalive, dns_lookup, closing, logging, finishing, idle_cleanup, open connections • •
apache.requests requests requests/s •
apache.net sent kilobit/s •
apache.reqpersec requests requests/s •
apache.bytespersec served KiB/s •
apache.bytesperreq size KiB •
apache.uptime uptime seconds •

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 apache 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 apache

Getting Logs

If you’re encountering problems with the apache 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 apache

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 apache /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 apache

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