ZenPacks

Memcached ZenPack

Monitoring for memcached.

Support

This is an Open Source ZenPack developed by Zenoss, Inc. Enterprise support for this ZenPack is available to commercial customers with an active subscription.

Releases

Version 1.0.0- Download
Released on 2012/02/07
Compatible with Zenoss Core 2.5.x, Zenoss Core 3.1.x, Zenoss Core 3.2.x, Zenoss Core 4.2.x, Zenoss Resource Manager 4.1.x, Zenoss Resource Manager 4.2.x, Zenoss Resource Manager 5.x

Background

This ZenPack allows for monitoring of memcached. See the Usage section for details on what is monitored. This ZenPack previously existed as a commercial-only extension to Zenoss called ZenPacks.zenoss.MemcachedMonitor. Upon being released as open source its name was changed to better match today's standards.

There already exists a very good community ZenPack for memcached by braudel. As far as I can see there is no compelling reason to use this version over that. Ultimately I'd like to see the ZenPacks come together to reduce confusion. At the time that this ZenPack was originally written, the community version didn't exist.

Usage

Installing the ZenPack will add a sample monitoring template called "memcached" in the root of your device class tree. This makes it available to be bound to any device in the system.

Assuming that you're running memcached on the standard port (11211/tcp), you only need to go to the device class containing your memcached servers, or to the individual device and bind the memcached template.

If you run memcached on a different port, you will either want to edit the command template in the datasource within the memcached monitoring template to change the port number.

The following graphs and their included metrics will be monitored on each device the template is bound to.
  • memcached - CPU Utilization (rusage_system, rusage_user)
  • memcached - Memory Utilization (bytes, limit_maxbytes)
  • memcached - Cache Efficiency (get_hits, get_misses)
  • memcached - Requests (cmd_get, cmd_set, evictions)
  • memcached - Items Cached (curr_items, total_items)
  • memcached - Connections (curr_connections, total_connections, connection_structures)
  • memcached - Throughput (bytes_read, bytes_written)

Installation

Normal Installation (packaged egg)

  1. Download the appropriate egg file for the version of Zenoss you are running.
  2. Ensure you are logged in as the zenoss user:
    $ sudo su - zenoss
  3. Install the ZenPack:
    $ zenpack --install ZenPacks.zenoss.Memcached-*.egg
  4. Restart these services:
    $ zenoss restart

Developer Mode Installation

In order to do a development mode installation you will want to clone the existing git repository, and then use the --link flag with the zenpack command:

  1. Ensure you are logged in as the zenoss user:
    $ sudo su - zenoss
  2. Start by cloning the upstream repository:
    $ git clone https://github.com/zenoss/ZenPacks.zenoss.Memcached.git
  3. Next, perform the installation:
    $ zenpack --link --install ZenPacks.zenoss.Memcached
  4. Finally, restart these serivices:
    $ zenoss restart

Open Source

This ZenPack is developed and supported by Zenoss Inc. Contact Zenoss to request more information regarding this or any other ZenPacks. Click here to view all available Zenoss Open Source ZenPacks.

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