Posts in 2019
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What is Service Mesh and do I need one?
Thursday, July 04, 2019 in Virtualization and Private Cloud
Let’s start with this - what problem does Istio solve? Or… are we just using it cause it’s the next cool thing? To be honest - there’s a bit of both, from what I’m seeing with most of my customers. To illustrate the …
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Kubernetes Proxy: Envoy vs NGINX vs HA Proxy
Tuesday, February 26, 2019 in Virtualization and Private Cloud
Having spent quite some time with Linux and Kubernetes admins, I’ve come to realize that networking isn’t one of their strong sides. Being a network guy myself, I feel obliged to share my views on topics as important as this one. So, …
Posts in 2018
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Migrate HyperFlex Cluster to a new vCenter
Wednesday, August 29, 2018 in Virtualization and Private Cloud
Get ready to have your mind blown. One of the easiest procedures I’ve encountered. You just need to follow these 3 steps, to migrate the entire HyperFlex vSphere Cluster with all its hosts from vCenter 1 to vCenter 2. Before you start: - Your …
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Install PowerCLI on Mac, start using PowerNSX
Friday, June 08, 2018 in Virtualization and Private Cloud
This is something I’ve been wanting to publish for a while, and finally my Mac got formatted (no questions will be taken at this point…) and I had to re-install it all, and I just couldn’t find the instructions on how to do it …
Posts in 2017
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OpenStack Networking, Explanation for Humans
Wednesday, December 13, 2017 in Virtualization and Private Cloud
Long time ago I published an OpenStack Networking principles, you can find it here: - OpenStack Neutron and OVS (Open Virtual Switch) translated to the Network Engineers language - Open Virtual Switch (OVS) Deep Dive: How L2 Agent “wires” …
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What are Cisco Cloud Center (CliQr) and UCS Director, how to choose/integrate?
Friday, June 02, 2017 in Virtualization and Private Cloud
Before we get into the details about each technology, and how you should choose which one best fits in your environment, I would strongly advise you to sit down and think about what exactly you need, what would be your ideal target environment. While …
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What is NFVi or Cisco NFV Infrastructure, and where exactly does it "fit"?
Tuesday, April 11, 2017 in Virtualization and Private Cloud
Follow @SnarchsCOM First let’s establish the difference between the NFV and the VNF: VNF (Virtualized Network Function) refers to the implementation of a network function using software that is decoupled from the underlying hardware. It simply …
Posts in 2016
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Cisco ACI and OpenStack Integration: RedHat vs Mirantis
Thursday, April 21, 2016 in Virtualization and Private Cloud
Note: This post requires basic knowledge of Cisco ACI architecture and ACI logical elements, as well as understanding of what OpenStack is, what the OpenStack elements (Projects) do, and the principles of what OVS and Neutron are and how they work. …
Posts in 2015
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Can OpenStack Neutron really control the Physical Network?
Monday, December 07, 2015 in Virtualization and Private Cloud
This is a question I´ve been hearing a lot when we present the OpenStack to a new client, mostly from the guys who control the Networking infrastructure. So, can the OpenStack Neutron module really control and configure the Physical Network? The …
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Open Virtual Switch (OVS) Deep Dive: How L2 Agent "wires" a new VM
Tuesday, November 17, 2015 in Virtualization and Private Cloud
The basics of the OVS (Open Virtual Switch) and OpenStack Neutron module were described in my previous post. Time to get a bit deeper into the OVS. A Virtual Machine (VM), a part from the CPU and Memory, needs the Connectivity. L2 Agent (OVS in this …