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Build OpenNMS with Docker

2018-07-14 Ronny Trommer
Being able to compiling an Open Source project is important. You can change the code, so you should also able to build it. Why is there a dedicated Docker image for the build environment? The dependencies running a pre-build OpenNMS Horizon distribution and compiling from source are different. To build OpenNMS Horizon you need Apache Maven and to compile JICMP, JRRD you need a C compiler environment. This is nothing you want to carry when you just want to run OpenNMS Horizon. Continue reading

Centralized Logging with Graylog2

2017-11-17 Ronny Trommer
How many times do you connect with SSH to your remote server and cat, grep, tail and awk through your logs? It probably works for 3 servers and running a handful services, but if you have more, you should definitely spend some time to centralize your logs. I personally prefer Graylog2 which can deal very well with different log formats like GELF, Syslog RFC’s. Just start some listener with the format and forward them to your Graylog2 instance. Continue reading