After a system crash I recently had the problem that Foreman had several orphaned tasks that could not be stopped from the web interface: Because I planned a Foreman upgrade this was pretty bad as it prevented the pre-upgrade check: 1# foreman-rake katello:upgrade_check 2... 3Checking upgradeability... 4Checking for …

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I'm currently working on a blog post series about Foreman, Katello and Red Hat Satellite 6. Here's the link collection for beginners: "Introduction and installation" (also published on Pro-Linux [button size="xsmall" color="red"]german[/button]) "Products, Repositories and Content …

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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 …

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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 …

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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 …

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More than a year ago, I upgraded my home lab to get started with vSAN. Back then I decided to go for a small hardware upgrade and already feared that the new resources will lack again very soon. And of course that happened after a short time, when I installed the vSAN cluster. Back then I already heard about the Xeon D …

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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: 1Unable to connect to vCenter Single Sign-On: Failed to connect to SSO; …

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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 …

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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 …

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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: 1# vi /etc/multipath.conf 2... 3ESC ZZ 4 5# service multipathd reload Afterwards, the device was removed …

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