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. It just used to increase availabilty and room to do maintenance without bringing your service down.
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Material Workshop OpenNMS im Büro 2.0

2015-03-31 1 min read Events OpenNMS Workshop 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.

Kickstart Workshop OpenNMS im Büro 2.0

2015-03-27 1 min read Events OpenNMS Ronny Trommer

Für diejenigen, die kurzentschlossen sind – hier eine letzte Erinnerung für einen kostenfreien Kickstart workshop zu OpenNMS. Die Registrierung und Anfahrt findet ihr unter:

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. If you want to play with it feel free and give it a try and contribute.

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. Currently i try to get some updates from the progress through the opennms.eu page. We have the following topics on the list:

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.

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/jdk1.6.0_41/bin/jar" 1
update-alternatives --install "/usr/lib/mozilla/plugins/mozilla-javaplugin.so" "mozilla-javaplugin.so" "/opt/jdk1.6.0_41/jre/lib/amd64/libnpjp2.so" 1
update-alternatives --config java

Some privacy and data leak stuff

apt-get remove unity-lens-shopping
System Settings -> Privacy Include Online Search results OFF / Record Activity OFF

Installing OpenNMS

update-alternatives --config java
vi /etc/apt/sources.list.d/opennms.list
deb http://debian.opennms.org stable main
deb-src http://debian.opennms.org stable main
wget -O - http://debian.opennms.org/OPENNMS-GPG-KEY | sudo apt-key add -
apt-get update
apt-get install opennms
echo "export JAVA_HOME=\"/opt/jdk1.6.0_41\"" >> /etc/profile
echo "export OPENNMS_HOME=\"/usr/share/opennms\"" >> /etc/profile
source /etc/profile
/usr/share/opennms/bin/runjava -s
vi /etc/postgresql/9.1/main/pg_hba.conf
file:/etc/postgresql/9.1/main/pg_hba.conf

host    all             all             127.0.0.1/32            trust
service postgresql restart
/usr/share/opennms/bin/install -dis
echo JAVA_HEAP_SIZE=768 >> /etc/opennms/opennms.conf
echo START_TIMEOUT=0 >> /etc/opennms/opennms.conf
service opennms start
apt-get install libwww-perl libxml-twig-perl

iReport installieren

cd ~
wget http://files.opennms-edu.net/iReport-3.7.6.tar.gz
tar xzf iReport-3.7.6.tar.gz
mv iReport-3.7.6 /opt
chown opennms:opennms /opt/iReport-3.7.6 -R
apt-get install --no-install-recommends gnome-panel
gnome-desktop-item-edit /usr/share/applications/ --create-new
Name: iReport 3.7.6
Binary: /opt/iReport-3.7.6/bin/ireport
Icon: gnome-power-statistics.png
Comment: Jasper Reports-Report Designer

Wallpaper

cd ~/Pictures
wget http://files.opennms-edu.net/wallpaper/free-software-ulf.jpg
cd /usr/share/backgrounds
wget http://files.opennms-edu.net/warty-final-ubuntu-ouce.png
sudo -i
xhost +SI:localuser:lightdm
su lightdm -s /bin/bash
gsettings set com.canonical.unity-greeter draw-user-backgrounds 'false'
gsettings set com.canonical.unity-greeter draw-grid 'false'
gsettings set com.canonical.unity-greeter background '/usr/share/backgrounds/warty-final-ubuntu-ouce.png'

RRD-Tool

sudo apt-get install rrdtool

Groovy

sudo -s
cd /root
wget http://files.opennms-edu.net/groovy-binary-2.1.1.zip
mv groovy-2.1.1 /opt
echo "export GROOVY_HOME=\"/opt/groovy-2.1.1\"" >> /etc/profile
source /etc/profile
ln -s /opt/groovy-2.1.1/bin/groovy /usr/local/bin/groovy
ln -s /opt/groovy-2.1.1/bin/groovyc /usr/local/bin/groovyc
ln -s /opt/groovy-2.1.1/bin/groovyConsole /usr/local/bin/groovyConsole
ln -s /opt/groovy-2.1.1/bin/groovysh /usr/local/bin/groovysh

Gradle

wget http://files.opennms-edu.net/gradle-1.4-all.zip
unzip gradle-1.4-all.zip
mv gradle-1.4 /opt
echo "export GRADLE_HOME=\"/opt/gradle-1.4\"" >> /etc/profile
ln -s /opt/gradle-1.4/bin/gradle /usr/local/bin/gradle

Workshop: Rule based event processing

cd ~
git clone http://www.github.com/m-schneider/ouce2013
cd ouce2013/groovy
. ./setenv.sh
cd ./non-gradle
./change-rules.sh

Output should look like: