Short tip: OMD and Python error “TypeError: ‘frozenset’ object is not callable”

When configuring and testing a Python Icinga plugin within an OMD site, I stumbled upon the following error recently: TypeError: ‘frozenset’ object is not callable After some tests on other systems, I found out, that the Python library hashlib shipped with OMD seems to be faulty. Copying the system-wide library into the OMD site did
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vRealize Orchestrator for beginners, part 1: Introduction and installation

With this article, I’m starting a blog series I’m really excited about. It’s all about VMware’s vRealize Orchestrator (vRO) – a very might tool than can simplify a VMware administrator’s workaday life heavily. 🙂 What is vRealize Orchestrator? vRO is a utility for automating IT processes around virtual environments. It integrates seamlessly into the vSphere and vRealize/vCloud
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PHP 5.6 under Enterprise Linux 7 using Software Collections

By default, Enterprise Linux 7 is shipped with Apache 2.4.6 and PHP 5.4. For some current web applications this is way too old as development of PHP 5.4 stalled in fall 2015. During the product life cycle,  Red Hat offers 10 to 13 years (Extended Support) maintenance for all packages being part of the distribution
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Enterprise Linux 7 and Oracle-related kernel parameters

When running Oracle databases under Linux, some additional kernel parameters need to be set. Oracle lists these parameters in the appopriate documentation – e.g. for the most recent version 12c: [click me!] Especially for Enterprise Linux 7 there is a dedicated profile for the tuned service (RPM package tuned-profiles-oracle). This services takes control over various
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Red Hat Enterprise Linux 6.8 released

Yesterday Red Hat released the 8th update of Red Hat Enterprise Linux 6. The changes have been documented in the release and technical notes: Release Notes: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.8_Release_Notes/index.html Technical Notes: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.8_Technical_Notes/index.html As usual, kernel driver updates were included. The following list also shows some of the further enhancements I’d like to mention: Running RHEL as Hyper-V
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Short tip: Changed Owncloud CardDAV/CalDAV URLs

Recently I had issues with configuring CardDAV-Sync and CalDAV-Sync along with Owncloud after a fresh Android installation. Specifying the well-known URLs just produced several error messages inside the app: https://my-server.tld/owncloud/remote.php/caldav/principals/USER/ https://my-server.tld/owncloud/remote.php/carddav/principals/USER/ In the logs I saw a lot of messages about missing sub folders. After searching on the internet, I had a deeper look at the Owncloud web interface and
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Compile Python applications automatically for Windows using GitLab CI

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Some time ago I wrote about GitLab Continuous Integration and explained how code changes can be catched up to create or update software packages on remote systems. In order to communicate with the development systems, GitLab utilizes agents that are availble for plenty of platforms – including Microsoft Windows, we will focus on in this
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vSphere HTML5 Web Client Fling

A couple of days ago, VMware developers announced a new fling called vSphere HTML5 Web Client. Basically, this is a virtual appliance based on SUSE Linux Enterprise Server 12 serving a completely rewritten Web Client. In comparison with the well known Web Client, this client only uses HTML5 and JavaScript – beelzebub Flash isn’t required
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