vSphere 6.7 – operation failed for an undetermined reason.

Posted on Leave a commentPosted in ESXi, System Administration, Virtualisation, vSphere

Recently I’ve upgraded a test vcenter appliance to 6.7 update 1 and found that a long standing issue is, well, an even longer standing issue. I was attempting to deploy an OVA file via the vCenter HTML5 (and subsequently the Flex) client and was confronted with the following warning; The operation failed for an undetermined […]

Ever wondered how many “raw” devices you can create on a Linux server?

Posted on Leave a commentPosted in CentOS 7, Fedora, Linux, Misc, RHEL 7, Storage, System Administration

I have to admit this isn’t a question that crops up all that often, but given what I have been through over recent months, I thought I’d share with the world. Lets start from the beginning… What are raw devices? Raw devices, are used when there is a need to present underlying storage devices as […]

Upgrading Fedora 25 to Fedora 26

Posted on Leave a commentPosted in dnf/yum, Fedora, Linux, RPM

Normally, I perform my OS upgrades by way of a clean install.  This time round though, I thought I’d give the upgrade process a try, given Fedora are pushing it quite a lot this time round. The actually process took about 30-35 minutes on my machine, and that’s including the time required to download the […]

Red Hat Satellite Server – Fatal error in Python code occurred [[6]]

Posted on Leave a commentPosted in Deployment, Linux, Python, Red Hat Satelitte Server, RHEL 7, Spacewalk, System Administration, Systems Management

I have embraced Red Hat Satellite server in a big way over the past year and try to use it wherever possible though not for everything. One of the features I started using to simply life whilst I look at other configuration management systems, was Configuration Channels.  These allow you to provide a central repository […]

iSCSI and Jumbo Frames

Posted on 2 CommentsPosted in Arista, CentOS 7, Cisco, Fedora, GNS3, iSCSI, Juniper, Linux, Microsoft, Networking, Networks, NFS, Pure Storage, RHEL 6, RHEL 7, Storage, System Administration, Windows 2008 R2

I’ve recently been working on a project to deploy a couple of Pure Storage Flash Array //M10‘s, and rather than using Fiber Channel we opted for the 10Gb Ethernet (admittedly for reasons of cost) and using iSCSI as the transport mechanism. Whenever you read up on iSCSI (and NFS for that matter) there inevitably ends […]

A step-by-Step Guide to Installing Spacewalk on CentOS 7

Posted on 10 CommentsPosted in CentOS 7, Deployment, dnf/yum, Fedora, Linux, RHEL 6, RHEL 7, RPM, Security, Spacewalk, Systems Management

It would appear that during an upgrade of my blog at some point over the past year, I have managed to wipe out the original how to guide to installing Spacewalk on CentOS 7, so here we go again. A step-by-step guide to installing Spacewalk on CentOS 7.  Just in case you weren’t aware Spacewalk […]