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 …

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 …

After my last Spacewalk 2.7 installation I had the problem that synchronising repositories using the web interface failed with the following error:

<img
  loading="lazy"
  decoding="async"
  alt="Reposync error in Spacewalk 2.7 web …</picture></figure></p>

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 …

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 …

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 …

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

After a system crash I recently had the problem that Foreman had several orphaned tasks that could not be stopped from the web interface:

<img
  loading="lazy"
  decoding="async"
  alt="Hängende Aufgabe" …</picture></figure></p>