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!! UPDATE THIS DOC !!

This file should contain documentation that is specific to what your ZenPack does. It should give example screenshots, explain how to install it, amongst other topics. Please see http://community.zenoss.org/docs/DOC-8495#README for details.

This file was automatically pulled from https://raw.github.com/zenoss/ZenPackTemplate/master/README.markdown It contains general comments, not specific to this ZenPack

ZenPack Template

This README describes the structure of the ZenPack template that gets automatically created by Zenoss when you add a ZenPack through the web interface.

Files

At the top-level a ZenPack must have a setup.py. Almost always a MANIFEST.in file should exist, and in cases where external dependencies must be built for inclusion in the ZenPack, a GNUmakefile. Examples of these files with inline comments are included in this template.

Also included in the ZenPackTemplate is a configure.zcml. As more of Zenoss' extensibility moves to using ZCA (Zope Component Architecture) this file becomes crucial to hooking into various aspects of Zenoss.

Files and Subdirectories

The following sections describe the purpose and use for each of the default subdirectories. Note that if the described functionality is not of use in your ZenPack it is safe to remove any of the default directories.

src/

The src/ top-level directory in ZenPacks is the conventional place to add third-party dependencies to your ZenPack. It should only be used as a staging area to do any build work necessary for the dependency.

See GNUmakefile (or GNUmakefile.example) for examples of how to have your third-party dependencies automatically compiled and installed at the right time and into the right location.

ZenPacks/NAMESPACE/PACKNAME/

The following sections describe the directories contained within the namespaced ZenPacks/NAMESPACE/PACKNAME/ subdirectories.

bin/

Any general tools delivered by your ZenPack that would be used by the Zenoss administrator at the command line should go into this directory by convention. When the ZenPack is installed all files in this directory will be made executable.

browser/

The browser subdirectory should contain all code and configuration that's specific to the Zenoss web interface. The provided configure.zcml will automatically load the example browser/configure.zcml and register the browser/resources/ subdirectory to serve static web content.

daemons/

All files in the daemons/ subdirectory get special handling. Upon installing the ZenPack, the following actions will occur.

1. The file will be made executable (chmod 0755)
2. A symlink to the file will be created in $ZENHOME/bin/
3. An configuration file will be generated at $ZENHOME/etc/DAEMON_NAME.conf

Assuming that you don't have a $ZENHOME/etc/DAEMONS_TXT_ONLY file this daemon will also become part of the normal zenoss start and stop processes.

You can find an example daemon control script in daemons/zenexample. For most purposes this file can be renamed to the name of the daemon you want to create and modified to change the DAEMON_NAME. No other modifications are typically needed. Note that this example control script does expect to launch the real daemon code which should be located at ../DAEMON_NAME.py.

datasources/

Any new datasource types you want to add must be added as classes into the datasources/ subdirectory. When Zenoss is building the list of available datasources it will scan the datasources/ subdirectory for all installed ZenPacks.

An example datasource at datasources/ExampleDataSource.py.example.

lib/

The lib/ directory should be the installation target for any third-party libraries that are built by the GNUmakefile. It can also be used as the conventional location to drop Python-only libraries that don't require any compilation or special installation.

libexec/

Any scripts executed by COMMAND datasources in your ZenPack go in this directory by convention. When the ZenPack is installed all files in this directory will be made executable.

migrate/

ZenPacks can include migrate scripts that allow you to run custom code to handle any tasks that are needed to upgrade your ZenPack from one version to another. All .py files in this migrate/ subdirectory will be evaluated when the ZenPack is installed.

You can find an example migrate script at migrate/ExampleMigration.py.

modeler/

Any modeler plugins distributed with your ZenPack must be located under the plugins/ subdirectory. The directory structure and filenames under plugins/ map directly to the plugins' name in the user interface. For example, if you wanted to create a modeler plugin called "community.snmp.ExampleMap" you would create the following directory structure.

It is recommended that the first portion of the namespace be a short lowercase form of your name, or organization's name. Alternatively you can choose to use "community" if you plan to publish the ZenPack and are open to outside contributions. Zenoss, Inc. will always use "zenoss." The second portion of the namespace can be the protocol that is used to collect the data. If you are not using a common protocol it is acceptable to skip the second portion of the namespace and have something like "community.MongoDB" instead.

plugins/
    __init__.py
    community/
        __init__.py
        snmp/
            __init__.py
            ExampleMap.py

Note that the __init__.py files must exist and should be empty files. Otherwise your modeler plugins won't be imported and usable within Zenoss.

objects/

All .xml files in this objects/ directory will be loaded into the object database when the ZenPack installs. All of the objects defined in the XML files will be automatically associated with the ZenPack.

When you export the ZenPack from the user interface all objects associated with the ZenPack will be exported into a file called "objects.xml" specifically. For this reason it is recommended to let Zenoss manage the objects.xml file and to never manually create or modify any .xml files in this directory unless you know what you're doing.

When a ZenPack is removed, any objects associated with the ZenPack will be recursively removed from Zenoss. For example, if you associated the /Server device class with your ZenPack and removed the ZenPack, the /Server device class, and all devices within it would also be deleted.

When a ZenPack is upgraded, or re-installed on top of itself, all objects in the XML files are overlaid on the existing object database. This results in a merge of the existing objects and what are defined in the XML files with the XML file properties and relationships winning any conflicts.

reports/

Custom reports will be loaded from this directory when the ZenPack is installed. Subdirectories (with the exception of plugins/) will be mapped directly to the report folders in the web interface. So if you add a .rpt file into a subdirectory named "Performance Reports" you will find your report in the Performance Reports folder in the web interface after installing the ZenPack.

The plugins/ subdirectory should include any Python plugins your custom reports call. So if your .rpt file contains a line such as the following..

objects python:here.ReportServer.plugin('myplugin', tableState);

There should be a corresponding myplugin.py file in the plugins/ subdirectory.

You can find an example report at Example Reports/Example Report.rpt.example that uses a plugin which can be found at plugins/example_plugin.py.

services/

ZenHub services will be loaded from the services/ directory. These services run inside the zenhub daemon and are responsible from all interaction with collector daemons.

You can find an example service at services/ExampleConfigService.py.

tests/

All unit tests for your ZenPack should live in this directory. You can find an example test suite at tests/testExample.py.

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