My Personal Blog
Technical stuff. Everything is my own.
In a containerized environment, you need persistent volumes . With HyperFlex 4.5, iSCSI thisis possible. What are the difference between using iSCSI or CSI in a container. Information about Kubernetes Persistent Volumes can be found HERE. iSCSI can only do: ReadWriteOnce and ReadOnlyMany. HX-CSI can do both AND also ReadWriteMany. (Block) There is a very … Read more
For the HyperFlex Container Storage Interface (HX-CSI) you will need a Kubernetes cluster. Here is the start of an image that have the right software on it and which you can clone before configuring Kubernetes. Start with a normal Ubuntu 18.04 installation. I just want to have certain versions of software and that is why … Read more
To make some awesome videos, I’m using my GoPro Hero8 with 2K7 (2704×1520) resolution. This is because I’m using a green screen and although the end videos are in FullHD, with this resolution I can easily crop, resize parts of the video without losing any quality. Cutting MP4 into smaller files would make life easier. … Read more
It was already impossible to login with root in HyperFlex Connect, but you still could login with SSH or locally with a root account. In HXDP 4.5 there is the Restricted Shell or Admin Shell. What is the Restricted Shell? In the restricted shell there is a limited number of commands that you can perform. … Read more
The latest HyperFlex Data Platform 4.5 can be found at: cisco.com/go/software and one of the new feature is iSCSI. With iSCSI you can have raw block storage device to your server over the network. I’ve already created a blog where I explained iSCSI in a nutshell and there is more! The playlist of all the … 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
HyperFlex is a fast hyperconverged solution with Hybrid, All Flash and even All NVMe solutions. It is possible to get even more performance out of your HyperFlex cluster with the HyperFlex Boost Mode. Official documentation can be found HERE. If this solution will give the HyperFlex cluster extra performance, why isn’t it enabled by default? … 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
When I started with my CCIE Journey, I had some 2511 to make sure I had remote console access. For my current lab I had to configure a NM-16A in an ISR router. How to set it up? Of course there is good documentation to Configure a Terminal but not everything was in that post. … Read more
A question which I hear on a regular basis is: What are the best practices for HyperFlex? On cisco.com there is a document with a lot of best practices for HyperFlex [LINK] What are best practices and why do you want to have them? When there is a guidance to the right direction, this will … Read more