Plant monitoring v0.1

IMPORTANT: This article will be updated, last change: 11.10.2020 13:42 Today I describe a new project to monitor plants: How it looks when it is integrated into Nagios GitHub Repository: nagios_check_plant_sensor Nagios configuration Mind the “local-service-plantsensor”, it’s important to reduce the calls to safe the plantsensor battery define service { name local-service-plantsensor use local-service max_check_attempts 1 check_interval 360 notification_interval 360 register 0 } define service{ use local-service-plantsensor,graphed-service host_name plantsensor service_description …

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oVirt: DataAccessResourceFailureException

From one day to another the oVirt Management Webinterface broke with the Exception: org.springframework.dao.DataAccessResourceFailureException:Error retrieving database metadata; nested exception is Error while extracting DatabaseMetaData; nested exception is org.postgresql.util.PSQLException: This connection has been closed. After investigating the log file I found in “/var/log/ovirt-engine-dwh/ovirt-engine-dwhd.log” the following error: org.postgresql.util.PSQLException: ERROR: right sibling’s left-link doesn’t match: block 2 links to 1 instead of expected 4 in index “idx_vm_device_history_vm_id_type” Solution Thanks to Strahil N., …

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oVirt 4.* add HA for HostedEngine

Today I describe how to enable the high available feature in oVirt with two hosts. Normally this should be enabled during adding one host but it can also be enabled afterwards as well. Shut down or migrate all VMs for the given host Put the host into maintenance Reinstall oVirt Set Hosted Engine to “deploy” Now you should see a crown beside the hostname You can migrate the HostedEngine to …

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Synchronize multiple Smart Light Bulbs

Today I describe how to synchronize multiple Smart Light Bulbs with one main bulb. You can set the color temperature and brightness for one main lamp, in this example the kitchen, based on this lamp other lamps are synchronized. It is not necessary that the lamps are online during changing the color temperature or brightness. Lights which are offline will get the new configuration after they are turned on. Environment …

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GPG high CPU usage

Today I had a very high CPU usage while using GPG. I found the answer inside the following ticket The high CPU usage was caused by a process like this /usr/bin/gpg –charset utf-8 –display-charset utf-8 –no-auto-check-trustdb –batch –no-tty –status-fd 2 –with-fingerprint –fixed-list-mode –with-colons –list-secret-keys ***** The reason is a huge key in ~/.gnupg/pubring.gpg. Mine was 37MB!!! Thanks to “dkg” who publish the following awk script: < ${GNUPGHOME:-~/.gnupg}/pubring.gpg gpg –list-packets …

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Nautilus stopped mounting USB disk

Weeks ago Nautilus stopped mounting USB devices/disks when they are plugged in. Here you find the solutions 🙂 Environment: Arch Linux (8.2.2019) Gnome (3.30.2) Nautilus (3.30.5) Solution: Open dconf and navigate to “” Set ‘x-content/unix-software’ for “autorun-x-content-start-app” or set as default value

Print Poster on multiple A4 Papers

Today we created a draft for our new Photowall with multiple A4 Papers. We used the tool pdfposter pdfposter -p 7x7a4 Fototapete.pdf Fototapete_A4.pdf Here you see the result

Matomo und die DSGVO

Folgende Einstellungen müssen bei Matomo ehemals Piwik angepasst werden um DSGVO-konform zu sein. 1. IP Adressen anonymisieren Als Administrator anmelden In den Einstellungen den Punkt “Daten anonymisieren” auswählen Einstellungen wie im Screenshot ersichtlich anpassen WICHTIG: Alte Daten müssen anonymisiert werden. Das benötigte Tool ist auf der gleichen Seite etwas unterhalb zu finden 2. Auf den jeweiligen Seiten muss der Datenschutz iFrame eingebettet werden Als Administrator anmelden In den Einstellungen den …

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Gnome 3: Missing ownCloud-client tray icon

If you use Gnome 3 under Arch Linux with ownCloud client you will see no tray icon by default. Here are the steps to get to the tray icon like you see in the screenshot Install gnome-Tweaks yaourt gnome-tweaks Install the Appindicator extension yaourt gnome-shell-extension-appindicator Open gnome tweaks and enable the extension Restart ownCloud-client or login and logout

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