Ceph

Plugin: python.d.plugin Module: ceph

Overview

This collector monitors Ceph metrics about Cluster statistics, OSD usage, latency and Pool statistics.

Uses the rados python module to connect to a Ceph cluster.

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

This integration doesn't support auto-detection.

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 Ceph instance

These metrics refer to the entire monitored application.

This scope has no labels.

Metrics:

Metric	Dimensions	Unit
ceph.general_usage	avail, used	KiB
ceph.general_objects	cluster	objects
ceph.general_bytes	read, write	KiB/s
ceph.general_operations	read, write	operations
ceph.general_latency	apply, commit	milliseconds
ceph.pool_usage	a dimension per Ceph Pool	KiB
ceph.pool_objects	a dimension per Ceph Pool	objects
ceph.pool_read_bytes	a dimension per Ceph Pool	KiB/s
ceph.pool_write_bytes	a dimension per Ceph Pool	KiB/s
ceph.pool_read_operations	a dimension per Ceph Pool	operations
ceph.pool_write_operations	a dimension per Ceph Pool	operations
ceph.osd_usage	a dimension per Ceph OSD	KiB
ceph.osd_size	a dimension per Ceph OSD	KiB
ceph.apply_latency	a dimension per Ceph OSD	milliseconds
ceph.commit_latency	a dimension per Ceph OSD	milliseconds

Alerts

The following alerts are available:

Alert name	On metric	Description
ceph_cluster_space_usage	ceph.general_usage	cluster disk space utilization

Setup

Prerequisites

rados python module

Make sure the rados python module is installed

Granting read permissions to ceph group from keyring file

Execute: chmod 640 /etc/ceph/ceph.client.admin.keyring

Create a specific rados_id

You can optionally create a rados_id to use instead of admin

Configuration

File

The configuration file name for this integration is python.d/ceph.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 python.d/ceph.conf

Options

There are 2 sections:

• Global variables
• One or more JOBS that can define multiple different instances to monitor.

The following options can be defined globally: priority, penalty, autodetection_retry, update_every, but can also be defined per JOB to override the global values.

Additionally, the following collapsed table contains all the options that can be configured inside a JOB definition.

Every configuration JOB starts with a job_name value which will appear in the dashboard, unless a name parameter is specified.

Config options

Name	Description	Default	Required
update_every	Sets the default data collection frequency.	5	no
priority	Controls the order of charts at the netdata dashboard.	60000	no
autodetection_retry	Sets the job re-check interval in seconds.	0	no
penalty	Indicates whether to apply penalty to update_every in case of failures.	yes	no
name	Job name. This value will overwrite the job_name value. JOBS with the same name are mutually exclusive. Only one of them will be allowed running at any time. This allows autodetection to try several alternatives and pick the one that works.		no
config_file	Ceph config file		yes
keyring_file	Ceph keyring file. netdata user must be added into ceph group and keyring file must be read group permission.		yes
rados_id	A rados user id to use for connecting to the Ceph cluster.	admin	no

Examples

Basic local Ceph cluster

A basic configuration to connect to a local Ceph cluster.

local:
 config_file: '/etc/ceph/ceph.conf'
 keyring_file: '/etc/ceph/ceph.client.admin.keyring'

Troubleshooting

Debug Mode

To troubleshoot issues with the ceph collector, run the python.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 python.d.plugin to debug the collector:

  ./python.d.plugin ceph debug trace