Deploy OVA/OVF templates using OVF Tool

Recently I had massive problems with deploying some VMware appliances under vSphere 6.5. Independently of the frontend (Host Client, HTML 5 Client, Web Client, C# Client) I was unable to deploy templates in a clean way at all – mostly aborts and “generic system failures” occured. Mark Brookfield gave me the tip to use OVF Tool instead
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Simple REST application with Python and Flask

Currently I’m spending a lot of time on automating complex application scenarios; during training I also starting learning about creating customized REST applications. The result was a tutorial which covers all stages of developing a small “RESTful” application: Concept/Definition Development Tests and documentation But, let’s start with the basics first… Crash course: REST in Peace REST
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vRealize Orchestrator Configuration Elements in a nutshell

When using an older vRO workflows (vRealize Orchestrator) I stumbled upon the problem that too many information needed to be entered manually. In this case it is easy to enter information incorrectly so I was looking for a possibility to avoid unnecessary inputs. During my researches I stumbled upon Configuration Elements. Reading two blog posts
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VMUG UserCon 2017 Germany

Last Wednesday (14.06.2017) this year’s german VMUG UserCon event was taking place in Frankfurt (KAP Europa, congress building of Messe Frankfurt). These conferences are taking place once in a year and complement regional VMUG conferences – it’s really worth a visit! Beside plenty of exhibitors, about 40 interesting talks were part of the program. Some of them
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Short tip: vCenter Server 6.5 UI installer: Failed to connect to SSO

When deploying vCenter Server 6.5 recently, I stumbled upon an issue that I was able to reproduce for the versions 6.5c and 6.5d. When deploying the appliance using the vCSA UI installer, the second stage always crashed with an error like this: Unable to connect to vCenter Single Sign-On: Failed to connect to SSO; uri:https://st-vcsa03.stankowic.loc/sso-adminserver/sdk/vsphere.local When
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System management with Foreman/Katello – Part 1: Introduction and installation

The last couple of years I spent a lot of time in managing Linux systems with Spacewalk and Red Hat Satellite 5. Because the application was superseded by the vendor, I investigated on migrations to the successor. Back in 2008, Spacewalk was published as upstream project to Red Hat Network Satellite. Since then, a lot of development happened thanks to the numerous
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Report VMware vSphere RHEL guests to RHSM using Red Hat Satellite 6.2

If you’re utilizing Red Hat Satellite 6 for managing virtual Red Hat Enterprise Linux instances, you will need to leverage Red Hat Subscription Management (RHSM) for maintaining licenses. In comparison with the former Red Hat Network Classic licensing, signed manifest certificates are used. For bigger system landscapes it is easier to list required and needed licenses as RHSM can integrate seamlessly into
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Short tip: Removing orphaned SAN multipath devices under Enterprise Linux

Recently, I had to remove a SAN LUN on a physical Enterprise Linux system. The first step was to alter the multipath service configuration file (/etc/multipath.conf) and make the daemon reload its configuration: # vi /etc/multipath.conf … ESC ZZ # service multipathd reload Afterwards, the device was removed from the multipath topology: # multipath -l
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Monitoring Foreman, Katello and Red Hat Satellite 6

Foreman, Katello and Red Hat Satellite 6 users have multiple possibilities to monitor infrastructure health. Beside the Foreman host, also managed systems and defined software content are worth monitoring. Foreman dashboard Foreman/Katello and Red Hat Satellite offer a dashboard with some widgets that can be used for monitoring hosts and products. The widgets can be ordered and removed.
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