Archive | ScienceLogic

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ScienceLogic Global Network Manager

ScienceLogic 7.5 includes many enhancements and new features. One I’m interested in is “Global Manager” which can be used to massively scale out the ScienceLogic architecture. Here’s some more detail on why ScienceLogic introduced this feature, and what it does. Problem: A Single Database I’ve talked before about the ScienceLogic architecture, and noted that the Database […]

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SNMP Counters – Collection Interval Variation

Counter data types are commonly used in SNMP monitoring. They are extremely useful, but there’s a couple of caveats around how to use them. Here’s a couple of issues I’ve come across: What are Counters? From RFC 2578: The Counter32 type represents a non-negative integer which monotonically increases until it reaches a maximum value of […]

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Using Paramiko/Python with FortiMail

Fortinet makes an email security/anti-spam appliance called FortiMail. I wanted to collect spam and virus statistics from it, to integrate with our Network Monitoring Systems. Unfortunately the data is not exposed via SNMP or API, so I had to resort to some ugly code to get it working. Here’s what I did: CLI – ‘diagnose statistics get total’ The only way […]

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Polling XML Values with ScienceLogic

Most Network Management Systems are built to make it easy to poll data via SNMP. But ‘interesting’ data is not always available via SNMP. Sometimes it’s in another format, such as XML. I’m working with ScienceLogic quite a lot recently, and it makes it easy to poll that data, alert on it, and integrate it with all […]

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ScienceLogic Database HA & DR

Previously I’ve looked at the overall ScienceLogic architecture, and HA options for the Collectors and UI. This post looks at DR and HA options for the core Database layer – the heart of the ScienceLogic system. HA vs DR There’s a few different definitions of HA and DR. These definitions are used here: High Availability – […]

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ScienceLogic – Collector and UI HA

Earlier I looked at the basics of ScienceLogic EM7 architecture. I didn’t cover how to achieve HA or DR with ScienceLogic. The architecture offers a few options for doing this, at each of the three layers – Collectors, UI and DB. In this post I’ll cover some HA options for the Collectors and the UI. […]

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ScienceLogic Architecture Overview

This is a basic overview of the ScienceLogic EM7 system architecture, describing the various components, their functions, and how they can be combined or split across multiple systems. I’ve been deploying ScienceLogic systems recently, so this blog acts as my own notes/summary. The ScienceLogic system can be broken down into five functions: Database: Stores all […]

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Network Monitoring Design Choices – Polling Distribution

Network monitoring systems poll devices periodically, and then calculate average rates across the poll interval. Selecting the right polling interval is important – too frequently, and low-end devices can’t keep up. Too long an interval, and we might miss spikes, will lose detail, and will increase our time to detect & respond to incidents. We […]

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ScienceLogic: Manually Running Dynamic Apps

ScienceLogic Dynamic Applications are policies that describe what data should be collected from managed systems, how it should be collected (SNMP, WMI, API, SQL, etc), how it should be presented, and what alerts should be created. Normally these are scheduled to run periodically, but sometimes you need to run them on an ad-hoc basis, particularly […]

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