Recently one of my vCenter Server Appliance (vCSA) 5.5 installations was unable to proceed logins anymore. After having a look at the storage consumption I saw that two partitions were filled up: 1# df -h /storage/{core,db} 2Filesystem Size Used Avail Use% Mounted on 3/dev/sdb1 20G 20G 0 100% /storage/core 4/dev/sdb3 …

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One of the rumors regarding VMware vSphere 6 was that a kind of slim vSphere Web Client will be part of ESXi to replace the outdated vSphere Client (legacy client). ESX offered a web-based administration utility, that has been completely removed in ESXi. Since then, the web interface of ESXi is only capable of browsing …

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If you are using drivers and libraries that need access to Oracle databases (e.g. perl-DBD-Oracle), you will need the Oracle Instantclient. Oracle offers this software for free after registration. Unfortunately creating correct provides tags was missed when creating the RPM packages. Even though Instantclient is …

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GitLab is a very popular alternative to GitHub that is available as free Community Edition for interested hobbyists and smaller companies. For installing the software, there is a script for downloading and installing the particular software packages. If you have a look at the source code of this script, you will see …

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Some of you might have recognized that it has been surprisingly quiet on my blog in the last couple of weeks. The reason for this was not that I have not been keen for blogging - rather I was working on something bigger that I'd love to present you today. 🙂 It is nothing less than a book about VMware vSphere named …

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After a couple of months or years plenty of storage is wasted on Windows systems and sometime it is not possible anymore to free space by using the well-known procedures. Recently I had this issue on a 5 year old system - the following steps did not help anymore: Executuing the Disk Cleanup utility Manual cleaning …

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Recently I stumbled upon the following error message while creating a DRBD volume on CentOS 7: 1# drbdadm create-md r0 2initializing activity log 3NOT initializing bitmap 4Writing meta data... 5lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory 6New drbd meta data block successfully …

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While configuring kdump on a system I recently stumbled upon the following error: 1Please reserve memory by passing "crashkernel=X@Y" parameter to the kernel However, the parameter crashkernel was mentioned in the GRUB configuration file and kernel commandline: 1$ grep crashkernel /proc/cmdline 2ro …

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If the Linux kernel crashes it is possible to create a memory image (also called vmcore) using a mechanism called kdump. Especially, this is useful if you plan to engage support to fix the reason for the issue. By default, the vmcore is stored under /var/crash. But if the kernel is not able to access the storage …

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After Red Hat Satellite 5.7 was released 3 months ago Spacewalk version 2.3 was published on 14th of april 2015 after 9 months of development. Like the commercial spin-off the recent management suite also offers a more modern web-interface. With version 2.2 this interface's user experience was overhauled by HTML5, …

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