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Zenoss Core Network and System Monitoring: A step-by-step guide to configuring, using, and adapting this free Open Source network monitoring system - with. Zenoss Core 3.x Network and System Monitoring Oracle Spatial And Graph Topology Data Model And Network Data Model Graph Developers Guide. Chapter 1: Network and System Monitoring with Zenoss Core Autodiscover devices. Our device inventory: A job well done. Reviewing device creation job.
He lives in north central Pennsylvania United States on a small farm and has recently taken to raising pastured chickens, honeybees, and pigs. Michael is searching for a way to integrate Zenoss Core into the hen house so that he can receive an alert each time an egg is laid. For more information, visit There are so many people to thank, starting with my family. They tolerate my late nights and weekend work. My team at Packt deserves a nod for finally helping me get this revision done.
We can define the organizers to be as specific as we need them to be, and not all organizers are required. In other words, no one will care if you do not define any groups. The information that we do specify can be used to establish monitoring rules, event handling, and alerting rules. Let's start by adding a location.
Locations Zenoss Core does not include any location organizers by default. To add a location, click on the Infrastructure menu. A list of organizers displays in the left sidebar of the page, as seen in the following screenshot: Potential location names are floors, buildings, wings, room numbers, or office locations. Use something that's meaningful to you. Select Locations from the sidebar of organizers. Enter the Name of the location, a Description, and an Address. For example, phone extension, driving directions, or site contacts may be practical items to include in the description.
The real-world address may be something you want to record about a location, especially if you have multiple locations. Zenoss Core provides a separate Address field for each location name that ties into the Google Maps portlet. The Google Maps portlet displays your locations on a map and connects them for some nice dashboard eye candy. If a marketer happens to come by, be sure to show them the Google Maps portlet.
You may make a friend. To add a sub-location, click on the name of the location from the list and click on the Add a child to the selected organizer button. Systems and Groups Groups are closely related to Systems and how you use them is an exercise of your imagination or operational needs. As an example, you might use groups to define nodes on the org chart while the Systems describe the devices in terms of function.
In my monitoring environment, I group websites by project manager, so my groups are names of people. I don't define any "systems" organizers, but you can.
There's no wrong answer. Systems and Groups are displayed in the same spot as the locations, by clicking on the Infrastructure menu. Adding either a system or a group works the same way, too. Click on either System or Group, and then click the Add a child to the selected organizer button.
Enter the Name and Description, as shown in the following screenshot: Adding a system is the same as adding a group, except that you select the Systems organizer in the sidebar first.
Organizer details Before we look at classes, let's take a quick look at how we can work with Locations, Groups, and Systems in the Zenoss Core interface.
You will notice that as you click on an organizer, the device list filters to include all the devices assigned to an organizer. We haven't assigned any devices to an organizer yet, so the device list is empty. However the following screenshot shows an established Zenoss Core installation: [ 54 ] 9 Chapter 3 If you click on the Details button, the sidebar changes to display the following items: Devices, Events, Administration, Map, and Modifications.
As we move through the book, we will cover each of these items in more detail, so I'll only provide a brief overview now. If you click on the Events link, you see all the events associated with that organizer.
We cover events in Chapter 6, Core Event Management. Click on the Administration link to display a list of commands, maintenance windows, and device administrators. We cover administration in Chapter 8, Settings and Administration. The Map page displays a map of the location based on the address information you entered for the organizer.
To see a list of changes for the device, click on the Modifications link. To exit the Details page, click on the See All button.
You can find the Edit option by clicking on the Actions menu button which looks like a sprocket at the bottom of the Infrastructure sidebar. See the following screenshot: Moving organizers You can nest organizers by dragging and dropping one organizer into another one to create a hierarchy.
You can only nest similar organizers, which means that you cannot move a system into a group or a group into a location. Classes Classes provide one of the most important organizers in Zenoss Core because we can use the classes to establish monitoring properties for groups of devices.
Each device inherits the properties of its parent class. Using classes, we can define specific monitoring rules and settings via zproperties.
All devices in a class share the same zproperties. Classes also define what types of information Zenoss Core collects about a device by assigning a set of collector plugins. Like the zproperties, each class contains a set of collector plugins that can change from one class to another. The Zenoss Plugins that we install on remote Unix servers are not the same as the collector plugins we configure for our devices.
Several classes exist to organize devices, events, services, and processes based on common groupings, but we'll stick to talking about devices right now. Zenoss Core includes a default hierarchy of classes; for now, we'll work within those default classes.
Next to each class is a number within parenthesis that indicates the number of devices that are associated with the class, including the sub-classes. The icon to the left shows the highest severity event for each class. Click on the class name to display all the devices assigned to that class. A devices can only be assigned to one class. A hierarchical list of the default device classes in Zenoss Core follows. However you can add as many classes as you want. There's no long term value in that.
To assign devices to a class: 1. Click on the Infrastructure menu to display a list of all devices. Select one or more devices.
Drag and drop the selected devices onto the appropriate device class. Click OK when prompted to confirm the move.
Notice that the interface is giving you some feedback.
You can only assign a device to one class, so the selected class is highlighted. The tool tip box in the screenshot is showing 1 selected row, which corresponds to the number of devices you're adding to the class.
After you classify the devices, it's time to model them.
Modeling devices Let's get our devices in shape to be modeled. When we talk about Zenoss Core, two related terms often come up, monitoring and modeling. Monitoring refers to the availability of the device and answers the question, "Is the device accessible?
Modeling defines relationships between devices and identifies the components available on a device, such as services, interfaces, and file systems. It then collects varying amounts of data about each component. Each class has a default set of collector plugins that tells Zenoss how to model the devices assigned to the class. Now is the time to put that work to use. Feel free to go back and review that section now. As we model our servers, routers, and other network devices, we'll be interested in setting the collector plugins and zproperties for each device.
Modeler plugins gather device information Each modeler plugin queries the device for a specific set of information that it will store in Zenoss Core's device database. What we collect depends on multiple factors, such as the capabilities of the device and the modeler plugins assigned to the device.
In general, we can expect to collect information about the operating system, file systems, interfaces, routes, processes, IP services, CPU, and memory. Modeler plugins can be assigned at the class level. However, we can configure exceptions from the class properties at the device level. Let's examine these modeler plugins I've been talking about. From the Infrastructure menu, select Devices. Click on the Details button to display a list of settings.
Find and click the Modeler Plugins link to display a sortable list of plugins. To see a list of unassigned plugins click on the Add Fields link. The plugin names are intuitive in that the name suggests the type of information we expect to collect. For example, zenoss. The Dell-specific plugins retrieve more detailed information from Dell devices using OpenManage, and the HP plugins provide more information about devices using Insight Management agents.
The plugins follow a three part naming convention. The first part identifies the author for example, zenoss. The final part identifies the specific information collected by the plugin for example, IpServiceMap, CpuMap, uname. Actually, the command plugins, identified by the "cmd" in the name, have an optional field to specify system architecture. For example, cmd. To remove a plugin from the assigned plugin list, click on the x next to the plugin name.
To assign a plugin, drag the plugin name from the available list to the assigned list. If we have one-off changes, we should make the changes at the device level. Assigning modeler plugins Take the time now to review the devices in your inventory and set the appropriate collector plugins. If you're not sure where to start, consider the following questions as a starting point: Will you monitor with WMI? If not, remove the zenoss. Does the device support SNMP?
If not, remove the snmp plugins. Is the server a Dell or HP? If so, add the zenoss. Plan to rely on port scan? Then use the port scan plugin.
Obviously, we can't cover every possible scenario; however that should get you started. Troubleshooting data collection Wouldn't it be nice if everything just worked? Unfortunately, we can expect to make a mistake or two. Not all network devices support SNMP. MyBB, download zenoss core network and system monitoring a step by step guide to configuring using and adapting the; MyBB Group.
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