Short tip: Full vCenter Server Appliance 5.5 database prohibits logins

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: # df -h /storage/{core,db} Filesystem Size Used Avail Use% Mounted on /dev/sdb1 20G 20G 0 100% /storage/core /dev/sdb3 60G 56G 90M 100% /storage/db
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VMware ESXi Embedded Host Client Fling

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of the rumors regarding VMware vSphere 6 was that a kind of slim vSphere Web Client will be part of ESXi to replace the outdated vSphere Client (legacy client).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 datastores and downloading the vSphere client
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Errorenous Oracle Instantclient RPM provides under Enterprise Linux

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 installed, software like perl-DBD-Oracle cannot be installed – because of
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Distribute GitLab Community Edition with Spacewalk

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 that this script uses conventional
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Short tip: DRBD + EL7: /var/lib/drbd/drbd-minor-0.lkbd: No such file or directory

Recently I stumbled upon the following error message while creating a DRBD volume on CentOS 7: # drbdadm create-md r0 initializing activity log NOT initializing bitmap Writing meta data… lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory New drbd meta data block successfully created. lk_bdev_save(/var/lib/drbd/drbd-minor-0.lkbd) failed: No such file or directory Oops! After executing the command
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Short tip: Please reserve memory by passing “crashkernel=X@Y” parameter to the kernel

While configuring kdump on a system I recently stumbled upon the following error: Please 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: $ grep crashkernel /proc/cmdline ro root=/dev/mapper/vg_system-lv_root … crashkernel=auto … rhgb quiet I saw that this setting works for
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Store kernel dumps using kdump on remote machines

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
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Spacewalk 2.3 released

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, jQuery and Bootstrap. Die updated
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