no42

... it's better to have good questions

Pimp my Mail Notifications

2016-03-07 2 min read OpenNMS Events Ronny Trommer
Notifications are important if you do monitoring. I never liked mail notifications from monitoring systems where all the information is hidden in non-sense text. Otherwise notifications never look the same, so I’m always forced to read all that useless crap again and again. This is an approach to improve the usability of monitoring notifications using more a table pattern which helps me to recognize useful information much quicker. Probably a lot of E-Mail guys will hate me for the reason I’m using HTML in mails. Continue reading

Material Workshop OpenNMS im Büro 2.0

2015-03-31 1 min read Events OpenNMS Ronny Trommer

Am 30.03.2015 haben wir im Büro 2.0 in Berlin einen Workshop mit OpenNMS durchgeführt. Die Zielgruppe waren NeueinsteigerInnen und alle die Interesse an Monitoring mit freier Software haben. Es wurden Installationszenarien, das Provisioning und beispielhaft diverse Monitore für Anwendungen und Dienste eingerichtet.

Die Slides sind unter einer freien CC-BY 3.0 lizenziert und stehen auf GitHub zur Verfügung.

Conferences OUCE 2015 and 31c3

2014-12-27 1 min read OpenNMS Events Ronny Trommer
I spent some time with preparing the OUCE 2015 and we use the free an open source software frab as conference management system. I do most of my server automation with Chef and my playground is running with Vagrant. For this reason I decided to spend some time an built a Vagrant / Chef environment and contributed it back to the frab project. This guys do a really good job and IMHO it is the best free conference management system you can get. Continue reading

Open Source Experience

2014-11-22 3 min read technology Open-Source Ronny Trommer
I spend a lot of time in the OpenNMS project and I love to work in free software and the workflows around it. We moved with our project from SourceForge to GitHub a few years ago and I think it was the right decision. There are now some established workflows in this ecosystem and they tear down borders between different open source projects and here is an example of it. Continue reading

OpenNMS and Documentation

2014-07-15 3 min read OpenNMS technology Ronny Trommer
To help the OpenNMS project I spent a year together with Alexander Finger and Klaus Thielking-Riechert writing an OpenNMS book. We started with a development version of for 1.8 and tried to find a mixture between consistent slow changing and new concepts in 1.8. It was kind a complicated thing and from my point of view not perfectly done. Nevertheless I’ve thought about something like: “It’s about time writing a second edition covering the topics in coming 1. Continue reading

OpenNMS Dev-Jam 2014

2014-06-04 1 min read Events OpenNMS Ronny Trommer
We are right in the middle of our 5th season of the year – DevJam. It is always a lot of fun spending one week with people from all over the world on the campus of the University of Minnesota. I’ve put on my personal agenda for this week, spending time with the folks working on the way how we want to document our project. I try also to gather the project ideas and where they contribute the code to the project. Continue reading

OUCE 2014 Review

2014-04-22 2 min read OpenNMS Events Ronny Trommer
We have finished our 6th OpenNMS User Conference Europe. It was the first time we made a conference outside of Germany. We started with the first conference in 2009 when I worked at NETHINKS and begun with OpenNMS professional services. For the 3rd and 4th conference we decided to move the venue closer to the people organizing the conference and the IT center in Fulda was a really good place. In 2013 NETHINKS and the OpenNMS Foundation Europe worked together to move the organization of the conference to the community at the University of Applied Science in Fulda. Continue reading

RRDtool graph improvement

2014-03-18 1 min read Ronny Trommer
If you have OpenNMS with RRDtool running, you can improve the whole rendering a little bit just by replacing the command.prefix in the following files: snmp-graph.properties snmp-adhoc-graph.properties response-graph.properties response-adhoc-graph.properties command.prefix=/usr/bin/rrdtool graph - --imgformat PNG --font DEFAULT:7 --font TITLE:10 --start {startTime} --end {endTime} -E --width=1000 --height=180 I don’t like the stamp size graphs in OpenNMS, so I changed it for all. It could be problematic if you have grouped graph report (KSC report). Continue reading

OUCE 2013 Lab Setup

2013-03-15 3 min read Ronny Trommer
System Ubuntu 12.10 Language: English Keyboard Layout: English Login: opennms Pass: ouce2013 Admins toolbox sudo -s apt-get install openssh-server apt-get install vim tcpdump git-core htop joe nmap iftop apt-get install snmp snmpd snmp-mibs-downloader Maven2 and Oracle Java 1.6 apt-get install maven2 wget http://files.opennms-edu.net/jdk-6u41-linux-x64.bin chmod +x jdk-6u41-linux-x64.bin ./jdk-6u41-linux-x64.bin mv jdk1.6.0_41 /opt update-alternatives --install "/usr/bin/java" "java" "/opt/jdk1.6.0_41/bin/java" 1 update-alternatives --install "/usr/bin/javac" "javac" "/opt/jdk1.6.0_41/bin/javac" 1 update-alternatives --install "/usr/bin/javaws" "javaws" "/opt/jdk1.6.0_41/bin/javaws" 1 update-alternatives --install "/usr/bin/jar" "jar" "/opt/jdk1. Continue reading
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