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Snap collector plugin - OpenVswitch

This Snap plugin collects metrics from the OpenVswitch software switch.

It's used in the Snap framework.

  1. Getting Started
  1. Documentation
  1. Community Support
  2. Contributing
  3. License

Getting Started

System Requirements

  • python 2.7+

  • pyenv 1.0.10+

  • acbuild 0.4.0+ The acbuild tool will be downloaded automatically while building ACI package, but it is recommended to install it manually in your system to speed up build process. For Ubuntu, you can do it just by:

    sudo apt-get install acbuild

For testing:

  • tox (install using pip install tox)

Operating systems

The plugin should work on any platform with Python2.7. The plugin has been tested on Linux and FreeBSD.


Python module

The preferred way to run Python based plugins is to leverage the python package index. This means that the Snap daemon, snapteld, will need to be run in an environment where the python module snap-plugin-collector-openvswitch was installed. If you install the plugin (pip install snap-plugin-collector-openvswitch) into the system's Python environment that should be enough. If you use a virtualenv be sure to activate it before starting snapteld since it will need access to the plugin and its dependencies.

To install the plugin run:

  • pip install snap-plugin-collector-openvswitch

The plugin includes a command line entry point also called snap-plugin-collector-openvswitch which should be in your path after installation.

Find the plugin's command line script:

  • which snap-plugin-collector-openvswitch
which snap-plugin-collector-openvswitch
> /home/mspoczy/.pyenv/versions/py2712/bin/snap-plugin-collector-openvswitch

The entry point script, snap-plugin-collector-openvswitch, is what we will be load into snapteld with the following command.

snaptel plugin load `which snap-plugin-collector-openvswitch`

Plugin package

An alternative installation method for Linux X86_64 is to use the binary package. The package includes a Python 2.7 distribution with the plugin already installed.

You can get the pre-built plugin package under releases page.

Known issues:

  • Longer plugin load times
  • A package is only available for Linux X86_64

Since the current default timeout may be exceeded start snapteld with the flag --plugin-load-timeout 30 (e.g. snapteld -t 0 -1 --plugin-load-timeout 30). Lastly, when you load the plugin you will also want to increase the clients timeout using the flag --timeout 30s (e.g. snaptel --timeout 30s plugin load snap-plugin-collector-openvswitch).

Configuration and Usage

  • Start snapteld
    • See the Snap readme for getting started details
    • Start snap: snapteld -t 0 -l 1
  • Ensure that openvswitch is installed and enabled


Collected Metrics

This plugin will identify all the interfaces and bridges connected to the OpenVswitch.

Below is an example of the metrics being gathered from OpenVswitch 2.6

Namespace Data Type Description (optional)
/intel/ovs/$deviceName/rx_over_err int
/intel/ovs/$deviceName/tx_dropped int
/intel/ovs/$deviceName/rx_packets int
/intel/ovs/$deviceName/rx_frame_err int
/intel/ovs/$deviceName/rx_bytes int
/intel/ovs/$deviceName/tx_errors int
/intel/ovs/$deviceName/rx_crc_err int
/intel/ovs/$deviceName/collisions int
/intel/ovs/$deviceName/rx_errors int
/intel/ovs/$deviceName/tx_bytes int
/intel/ovs/$deviceName/rx_dropped int
/intel/ovs/$deviceName/tx_packets int


In this example we will collect data from OpenVswitch and publish it to a file. It is assumed that you are using the latest Snap binary and plugins.

The example is run from a directory which includes snaptel, snapteld, along with the plugins and task file.

21 Start the Snap daemon:

  • Run:
$ snapteld -l 1 -t 0

The option "-l 1" is for setting the debugging log level and "-t 0" is for disabling plugin signing.

  1. Load the plugin:
  • Run (in a different terminal):
$ snaptel plugin load `which snap-plugin-collector-openvswitch`
Plugin loaded
Name: openvswitchcollectorplugin-py
Version: 1
Type: collector
Signed: false
Loaded Time: Fri, 19 Jan 2018 16:57:35 PDT
Load from ACI package:

If using ACI package, you don't need to pass any environment variables, just start Snap daemon with root permissions:

$ sudo snapteld -l 1 -t 0

Then load openvswitch plugin from ACI package:

$ snaptel plugin load dist/snap-plugin-collector-openvswitch/linux/x86_64/snap-plugin-collector-openvswitch-linux-x86_64.aci
Plugin loaded
Name: openvswitchcollectorplugin-py
Version: 1
Type: collector
Signed: false
Loaded Time: Fri, 19 Jan 2018 11:20:05 PDT
  • List the metric catalog by running:
$ snaptel metric list
/intel/ovs/*/rx_over_err   1
/intel/ovs/*/tx_dropped   1
/intel/ovs/*/rx_packets   1
/intel/ovs/*/rx_frame_err   1
/intel/ovs/*/rx_bytes   1
/intel/ovs/*/tx_errors   1
/intel/ovs/*/rx_crc_err   1
/intel/ovs/*/collisions   1
/intel/ovs/*/rx_errors   1
/intel/ovs/*/tx_bytes   1
/intel/ovs/*/rx_dropped   1
/intel/ovs/*/tx_packets   1

See available metrics for your system. Note the * in the metric list. It indicates a dynamic metric which will be update depending on the device names and attribute available on the system being monitored.

  1. Download the file publisher plugin and load it
  • Get the latest file publisher plugin by running:
$ wget
  • Load the file publisher plugin by running:
$ snaptel plugin load snap-plugin-publisher-file
Plugin loaded
Name: file
Version: 2
Type: publisher
Signed: false
Loaded Time: Fri, 19 Jan 2018 14:47:59 PDT
  • Create a task file by running:
cat <<EOF>ovs-file.yaml
  version: 1
    type: "simple"
    interval: "1s"
        /intel/ovs/*/rx_over_err: {}
        /intel/ovs/*/tx_dropped: {}
        /intel/ovs/*/rx_packets: {}
        /intel/ovs/*/rx_frame_err: {}
        /intel/ovs/*/rx_bytes: {}
        /intel/ovs/*/tx_errors: {}
        /intel/ovs/*/rx_crc_err: {}
        /intel/ovs/*/collisions: {}
        /intel/ovs/*/rx_errors: {}
        /intel/ovs/*/tx_bytes: {}
        /intel/ovs/*/rx_dropped: {}
        /intel/ovs/*/tx_packets: {}
          plugin_name: file
            file: /tmp/published_ovs.out

Example (JSON) task manifest

  1. Start task by running:
$ snaptel task create -t ovs-file.yaml
Using task manifest to create task
Task created
ID: c6d095a6-733d-40cf-a986-9c82aa64b4e2
Name: Task-c6d095a6-733d-40cf-a986-9c82aa64b4e2
State: Running
  • List the task by running:
$ snaptel task list
c6d095a6-733d-40cf-a986-9c82aa64b4e2 	 Task-c6d095a6-733d-40cf-a986-9c82aa64b4e2 	 Running 	 9 	 0 	 0 	 10:39AM 2-23-2017
  • Watch the task by running:
$ snaptel task watch c6d095a6-733d-40cf-a986-9c82aa64b4e2
  • Stop the task by running:
$ snaptel task stop c6d095a6-733d-40cf-a986-9c82aa64b4e2
Task stopped:
ID: c6d095a6-733d-40cf-a986-9c82aa64b4e2


There isn't a current roadmap for this plugin, but it is in active development. As we launch this plugin, we do not have any outstanding requirements for the next release. If you have a feature request, please add it as an issue and/or submit a pull request.

Community Support

This repository is one of many plugins in Snap, a powerful telemetry framework. See the full project at To reach out to other users, head to the main framework


We love contributions!

There's more than one way to give back, from examples to blogs to code updates. See our recommended process in


Snap, along with this plugin, is an Open Source software released under the Apache 2.0 License.

This software has been contributed by MIKELANGELO, a Horizon 2020 project co-funded by the European Union.

Thank You

And thank you! Your contribution, through code and participation, is incredibly important to us.


OpenVswitch collector for Snap Framework




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