Recently I had some issues with a Linux cluster running Corosync, Pacemaker and Apache. I was unable to run the redskin as ressource - starting always failed with "invalid parameter": 1# crm resource start apache 2# crm status 3... 42 nodes configured 55 resources configured 6 7Online: [ deb9-node2 deb9-node1 …

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Last Tuesday, one of the SUSE Linux Expert Days 2018 events was taking place in Frankfurt. Every year, SUSE arranges plenty of those events in order to update customers with talks and demonstrations about new products and updates. Instead of less events with bigger audience, 80 regional events are arranged to keep …

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A fresh Spacewalk installation usually defines user accounts in a local manner - including permissions. Especially for bigger system landscapes with requirements such as Single Sign-on, this is not a practical solution. Fortunately, Spacewalk and Red Hat Satellite 5 support authentication using FreeIPA and Red Hat …

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After my last Spacewalk 2.7 installation I had the problem that synchronising repositories using the web interface failed with the following error: The system protocol (/var/log/messages) included the following finding: 1Jan 24 21:02:13 st-spacewalk03 server: Caused by: java.lang.RuntimeException: File not found: …

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When installing Spacewalk 2.7 under CentOS 7.4 along with PostgreSQL 9.2.23, I recently stumbled upon the following error: 1# spacewalk-setup 2* Setting up SELinux.. 3** Database: Setting up database connection for PostgreSQL backend. 4** Database: Installing the database: 5** Database: This is a long process that is …

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Every Linux user knows the following scenario: a running process should be moved to another terminal. An example: an application update takes longer than expected and the status should be monitored on the go in GNU Screen. It's just nasty, if you forgot to prepare this prior to that. Happily, there are plenty tools for …

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When reinstalling one of my homelab vSphere cluster nodes I noticed again, that the Intel driver ixgbe is not part of the ESXi base image. This driver is needed for my Supermicro mainboard X10SDV-TP8F in order to enable 10G networking. On the VMware download section there is an appropriate download for ESXi 6.0. …

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The last post of this series introduced the software projects Foreman and Katello. If you followed the instructions, you were able to login to a fresh Foreman installation. In this part, the new installation is filled with live: first software contents are added to deploy and manage systems later. If you already had a …

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I have been blogging in multiple languages for couple of years: in my mother tongue german and - because of international visitors - also in english. In the beginning I decided to go for the qTranslate plugin. Unfortunately, development stalled at some time and I had to find an alternative. Luckily there were some …

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To find out the WWN port name of a HBA under Linux, reading the port_name file is sufficient - e.g. for all HBAs: 1$ cat /sys/class/scsi_host/host*/device/fc_host/host*/port_name 20x2002f6dc44b8e2b6 30x2001f6dc44b8e2b6

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