Having trouble reading this email? Click here.

 

SUMMARY

Hi [First Name],

A quick but important one this month: a bugfix release you should not skip, an upcoming webinar on OpenTelemetry metrics, fresh how-to posts from the blog, and a new home for all Icinga plugins. 

 

Happy reading!

UPCOMING WEBINAR

Join us for a hands-on session on the OTLPMetricsWriter - the new Icinga 2 v2.16 feature that exports check performance data as OpenTelemetry Gauge metrics. We will walk through configuration, integration with Prometheus, Grafana Mimir, VictoriaMetrics, and Datadog, and cover how the writer fits into existing Icinga setups including HA cluster zones. Live Q&A at the end.

Date: June 30, 2026 
Time: 3 PM - 4 PM CEST // Convert your local time

RELEASE OVERVIEW

Icinga 2 v2.16.1 Bugfix Release

Version 2.16 brought a solid set of improvements, but also introduced a regression that we caught shortly after the release. The rework of several performance data writers in 2.16.0 caused issues that in some cases could prevent Icinga 2 from working entirely. Affected writers include ElasticsearchWriter, GraphiteWriter, GelfWriter, InfluxdbWriter, Influxdb2Writer, and OpenTsdbWriter.

We moved quickly to address it: Icinga 2.16.1 reverts those writers to their v2.15.3 state while we continue investigating the root cause. If you are running 2.16.0, upgrading to 2.16.1 is the right move. All details are in the release announcement.

BLOG

Get Valid TLS Certificates for Icinga Web Despite a Firewall

When your Icinga Web instance sits behind a firewall, Let's Encrypt can't reach your web server to validate it. This post walks through using the ACME DNS-01 challenge with BIND 9 and certbot to fully automate certificate renewal while keeping internal services protected.

Tips and Tricks for Handling Secrets in Icinga 2

Icinga 2 has no dedicated secrets management, but there are practical ways to keep credentials out of your config and off the command line - from environment variables and file-based secrets to systemd credentials.

How to Create Your Own Plugins and Check Commands in Icinga 2

The built-in plugins cover a lot of ground, but every infrastructure has gaps. This post explains how to write a custom check plugin and wire it up with a CheckCommand object in Icinga 2 - including argument passing, variable defaults, and reuse across services.

IPL: How to use the ipl-web TermInput

Most form fields collect a single value - but some need a list. If you build Icinga Web modules, the ipl-web TermInput is worth knowing: this post walks through per-term validation, label enrichment, and autocomplete suggestions with a hands-on weekday picker example.

NSClient++ 403 Error

A user in the forum noticed a breaking change in NSClient++ v0.11.6+ causes 403 errors when using Icinga 2 agents on Windows.

x509 Certificate Checks in Director

Community members discussed how to add x509 certificate service checks to existing hosts in Icinga Director without importing new hosts. The answer? A custom Director Basket.

"Service Object Name Too Long" Warnings After Upgrading to 2.16

Unexpected config warnings after upgrading to Icinga 2.16 explained. And how the user fixed them by switching from array to dictionary iteration in apply rules.

Over 1,000 Icinga plugins are now available on a dedicated plugins page with filtering by category and vendor. Previously hosted on the Icinga Exchange, the directory has moved to a new home that makes it easier to find checks for network devices, cloud services, databases, storage, and applications. Browse by what you're monitoring or by who built it.

NEED ANYTHING ELSE?

We are more than a software provider. We understand ourself as your monitoring partner. Connect with our Sales for personalized support, training, and consulting.

You made it to the end of this newsletter!

If you have any questions, feedback or anything you would like us to cover in the next newsletter, don't hesitate to get in touch. 

 

Until next month, 
Angelika and the Icinga Team

How would you rate this month's newsletter?

 

FOLLOW US

 

If this message is not displayed properly, click here please.

Icinga GmbH 
Deutschherrnstr. 15-19 
90429 Nuremberg 
Germany 

+49 911 9288555 
info@icinga.com 
https://icinga.com 
CEO: Julian Hein, Bernd Erk 
Register: Nuremberg 
Tax ID: DE318593083 

If you don't want to receive any more messages (to: [Email]), you can manage your preferences.