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RabbitMQ Monitoring for Zenoss

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README.markdown

ZenPacks.zenoss.RabbitMQ

This project is a Zenoss extension (ZenPack) that allows for monitoring of RabbitMQ. See the Usage section for details on what is monitored. You can watch the Monitoring RabbitMQ video for a quick introduction that covers most of the details below.

Requirements & Dependencies

This ZenPack is known to be compatible with Zenoss versions 3.2 through 4.0. There's a high likelihood that it is also compatible with any Zenoss 3.0 and 3.1 also, but these have not yet been tested.

Installation

You must first have, or install, Zenoss 3.2.0 or later. Core and Enterprise versions are supported. You can download the free Core version of Zenoss from http://community.zenoss.org/community/download.

Normal Installation (packaged egg)

Depending on what version of Zenoss you're running you will need a different package. Download the appropriate package for your Zenoss version from the list below.

Then copy it to your Zenoss server and run the following commands as the zenoss user.

zenpack --install <package.egg>
zenoss restart

Developer Installation (link mode)

If you wish to further develop and possibly contribute back to the RabbitMQ ZenPack you should clone the git repository, then install the ZenPack in developer mode using the following commands.

git clone git://github.com/zenoss/ZenPacks.zenoss.RabbitMQ.git
zenpack --link --install ZenPacks.zenoss.RabbitMQ
zenoss restart

Usage

Installing the ZenPack will add the following objects to your Zenoss system.

  • Modeling Plugins
    • zenoss.ssh.RabbitMQ
  • Monitoring Templates
    • RabbitMQNode in /Devices
    • RabbitMQQueue in /Devices
  • Event Classes
    • /Status/RabbitMQ
    • /Perf/RabbitMQ
  • Command Parsers
    • ZenPacks.zenoss.RabbitMQ.parsers.RabbitMQCTL

These monitoring templates should not be bound directly to any devices in the system.

To start monitoring your RabbitMQ server you will need to setup SSH access so that your Zenoss collector server will be able to SSH into your RabbitMQ server(s) as a user who has permission to run the rabbitmqctl command. To do this you need to set the following zProperties for the RabbitMQ devices or their device class in Zenoss.

  • zCommandUsername
  • zCommandPassword
  • zKeyPath

The zCommandUsername property must be set. To use public key authentication you must verify that the public portion of the key referenced in zKeyPath is installed in the ~/.ssh/authorized_keys file for the appropriate user on the RabbitMQ server. If this key has a passphrase you should set it in the zCommandPassword property. If you'd rather use password authentication than setup keys, simply put the user's password in the zCommandPassword property.

You should then add the zenoss.ssh.RabbitMQ modeler plugin to the device, or device class containing your RabbitMQ servers and remodel the device(s). This will automatically find the node, vhosts, exchanges and queues and begin monitoring them immediately for the following metrics.

  • Node Values
    • Status - Running or not? Generates event on failure.
    • Open Connections & Channels
    • Sent & Received Bytes Rate
    • Sent & Received Messages Rate
    • Depth of Send Queue
    • Consumers
    • Unacknowledged & Uncommitted Messages
  • Queue Values
    • Ready, Unacknowledged & Total Messages
    • Memory Usage
    • Consumers

There is a default threshold of 1,000,000 messages per queue. This is almost certainly an absurdly high threshold that shouldn't trip in normal systems. However, by clicking into the details of any individual queue you can set the per-queue threshold to a more reasonable value that makes sense for a given queue.

Related ZenPacks

There already exist at least two community Zenpacks that provide monitoring for RabbitMQ.

  • ZenPacks.dnalley.AMQPEventMonitor by David Nalley: Very different functionality than what's provided by this ZenPack. It allows you to pull messages from a defined queue and automatically turn them into Zenoss events.
  • ZenPacks.community.RabbitMQ by Greg Guthe: More similar to this ZenPack in its functionality. Global metrics for queued messages and rates. It appears to require that the HTTP management API plugin be installed into your RabbitMQ instances, and that a Net-SNMP extension also written by Greg Guthe be installed.

The major differences between the ZenPacks.community.RabbitMQ and this pack are that this pack simply runs various rabbitmqctl commands over SSH both to model the node, vhosts, exchanges and queues; as well as to monitor connection, channel and per-queue metrics. So you don't need to install anything extra on your RabbitMQ server, and you get more granularity on the monitoring.

In the future this pack might be extended to also support RabbitMQ's HTTP management API plugin in addition to the SSH method.

Screenshots

ComponentsNodesNode ThroughputNode ChannelsVHostsExchangesQueuesQueue Metrics

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