My Personal Blog
Cisco Data Center related stuff.
VMware has two different storage architectures:OSA or Original Storage Architecture is the current name for the “old” VMware vSAN published in March 2014. (vSAN 5.5). ESA or Express Storage Architecture is the “new” vSAN, available since vSAN 8. This version has an entirely different foundation and significant advantages than the OSA. There are still some … Read more
Because I am doing a lot of testing it can be rewarding to do a complete re-installation of a Kubernetes cluster. As a result the only thing I disliked was the manual process of the Ubuntu installation.Here is a procedure to automate a complete Ubuntu installation and customize it. Requirements Before you can start, make … Read more
An UCS server can be in stand-alone mode. In this case it is not connected to any Fabric Interconnect and you can control it via CIMC. If you want to connect it to a Fabric Interconnect after being in stand-alone mode, you must reset the CIMC to factory reset. An official document can be found … Read more
In the blog of Vijay and in the podcast of Ronnie Chan a new feature of HyperFlex is mentioned: iSCSI. In this blog I will describe what iSCSI is. I already made a blog about iSCSI Target and Initiator Configuration and even a config of iSCSI QoS Nexus (2014 post, so things can be changed.) … Read more
How do you know when there is a new release of software or you are waiting for a bug fix… It’s possible with the Cisco subscription ! Get Email Notifications of Updates Just create a subscription at : https://cway.cisco.com/mynotifications When you login with your CCO account you will see : You can select End … Read more
To be honest, I never worked with iSCSI. After some questions, I had a closer look about the protocol. If you don’t have anything to do during a evening, you can read RFC 3720 and RFC 3721. The first thing you will need if you want to have some hands-on with the protocol is to … Read more
I already created some post where I showed how easy it is to upgrade HyperFlex and how to upgrade ESXi. Wouldn’t it be nice if upgrading HyperFlex, ESXi and UCS Manager in one procedure.. With no bootstrap etc. If you are on a version prior HXDP 3.5, you will have to do the bootstrap process … Read more
HyperFlex is getting easier and easier to install, configure and upgrade. In the following post I am going to show you how easy a HyperFlex upgrade is. But first you will have to do some manual things in the UCS Manager. Here you will see my starting point. UCS Manager and we’re going to upgrade … Read more
InterSight.com is a cloud monitoring and configuration manager for UCS and HyperFlex products. You can not only monitor HyperFlex, but also do a complete installation of HyperFlex via InterSight. When you have a lot of servers, you want to search in an easy way to find the right server or HyperFlex Cluster. How to do … Read more
For the Cisco Live US 2019 HyperFlex Data Protection Deep Dive breakout, I needed a HyperFlex 4.0 Stretched cluster to show some failures that can be beaten. In this post I will show the steps to install a stretched cluster (or synchronous replication cluster) What is a Stretched Cluster ? If you want to have … Read more