HP OneView[1] is an infrastructure management application that provides a rich HTTP/JSON RESTful API and a State Change Message Bus (SCMB) implemented using AMQP/RabbitMQ. This provides the opportunity to integrate OneView with other systems. Slack[2] is a group messaging system that is increasingly used by IT infrastructure teams. Slack provides many integration points that allow messages to be published into chat channels from other applications.

This example Python application listens on the OneView SCMB for messages relating power status changes in the servers OneView is managing and publishes them into a Slack channel.

As described below there is some SSL setup required. This uses the python-hpOneView[3] library which has a minimum requirement of Python 3.4. The main application only requires the AMQP library, so should run on earlier versions of Python (not tested).

The SCMB is encrypted using SSL so it is necessary to generate (if not done previously) and download the relevant certificates and keys. To make this simpler there is a small application called keys.py to generate and download the certificates and keys. Running the command:

keys.py -s <oneview server> -u <username> -p <password>

will download the client certificate, key, and CA root bundle to the current working directory. Options to place the files in a particular directory and to generate keys are available - run keys.py with the -h flag for full help.

The application uses a single configuration file to define the following parameters. In the [slack] section:

• webhook is the URL of the incoming web hook that you configure within the Slack web interface.
• channel is the name of the Slack channel that you want to send messages to. I think this needs to be prefixed with a #.
• botname is the name of the bot that will be associated with the published messages. You could set this to the name of you OneView server if you were running multiple instances.

In the [oneview] section:

• server is the name or IP address of your OneView server.
• username is the username that the application will use to authenticate to OneView.
• password is the password that the application will use to authenticate to OneView.
• certfile is the path to the certificate file you downloaded with keys.py.
• keyfile is the path to the key file you downloaded with keys.py.
• caroot is the path to the CA root file you downloaded with keys.py.

Once you have created the configuration, running the application is as simple as:

server.py -f /path/to/your/configuration/file

If you power off one of your servers using the OneView GUI you should see two messages published in your Slack channel: one stating that the server is powering off and second once the server has completed the power off. A similar pattern will occur if you power on a server.

[1] http://www.hp.com/go/oneview [2] https://slack.com [3] https://github.com/HewlettPackard/python-hpOneView