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UCARP and High Availability

2020-02-07 2 min read Technology Open-Source Ronny Trommer
If you have ever played with BSD you probably ran into CARP. It allows you to build a high available service which is provided by two physical servers behind a virtual shared IP address. The CARP nodes define a master and a backup system. A master serves the content and if the master crashes, the backup system takes over automatically the virtual IP (VIP) and the client won’t notice. Disclaimer: You should be aware this setup will not share load and increase your network throughput. 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

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

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