My Personal Blog
After the installation of HyperFlex, you will have an evaluation period. During this time you have to register the cluster with a valid license. There are features that won’t be running anymore after the evaluation period is over. How to register your HyperFlex cluster? In HyperFlex Connect there is information about the license of the … Read more
Specialized applications can need to read/write directly to a block device. The main use case are databases. A filesystem is more “human-readable” and it adds extra overhead. Instead of the filesystem, block devices are chosen more often. More information about Kubernetes can be found HERE. After the installation of Kubernetes and the HyperFlex Container Storage … Read more
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
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
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
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
VDBench is a nice tool to see what the performance is of storage. To make life easier HXBench was created. You can see what the performance of your HyperFlex cluster is. And you can also use this tool to fill up your cluster with capacity! There are different methods to do it. [See This Post] … Read more
Via Intersight it is possible to install HyperFlex and HyperFlex Edge clusters very easy. Now you can also upgrade the ESXi Hypervisor of the HyperFlex cluster via Intersight. Upgrade Hypervisor Go to Intersight.com and select HyperFlex Clusters. You will see your HX Clusters and on the right you will see 3 dots. When you click … Read more