Cornucopia of Ideas GNU/Linux, Networking, Security and more ...

Creating a VM on GCE via gcloud cli

How to Create VM on GCE via gcloud CLI Google Compute Engine(GCE) is the IaaS component of Google Cloud Platform (GCP) which runs virtual machines on demand. GCE allows users to use standard or custom OS images. It also allows user to define startup scripts to be run on boot. GCP allows you to create your vm over the web interface called console. But in this post it will used gcloud utility for the sake of non-interactive vm deployment, which is faster and better provisioning method for mass provisionings.

Configure NVIDIA GPU on ESXi to be used by VMs

How NVIDIA vGPU Software is Used ? NVIDIA vGPU software can be used several way. 1. NVIDIA vGPU NVIDIA Virtual GPU (vGPU) enables multiple virtual machines (VMs) to have simultaneous, direct access to a single physical GPU, using the same NVIDIA graphics drivers that are deployed on non-virtualized operating systems. By doing this, NVIDIA vGPU provides VMs with unparalleled graphics performance, compute performance, and application compatibility, together with the cost-effectiveness and scalability brought about by sharing a GPU among multiple workloads.

Kubernetes MetalLB Loadbalancer with BGP mode

In this post, MetalLB will be used on-premise as a Load Balancer with BGP to expose services on Kubernetes to outsideworld. As you know, if you have applications run on Kubernetes which is on your on-premise, that needs to be exposed to the outsideworld, should use LoadBalancer which is a bit tricky. it is quite easy if your applications in cloud environment such as AWS, Azure, or Google Cloud. Otherwise, you have to do similar in your on-premise network, with MetalLB or HAproxy.

Creating Bridges and VLANs with Netplan

In this post, It will be demonstrated how to create Bridges and VLANs to be used on KVM. In my other post, I already implemented VLANs using Openvswitch. Physical host that I used on this lab is Linux Mint 20 (Ulyana). Netplan is a utility for easily configuring networking on a GNU/Linux systems. You can easily create network configuration with YAML syntax. Netplan reads network configuration from /etc/netplan/*.yaml which are written by administrators, installers, cloud image instantiations, or other OS deployments.

Finding Server IMM IP by IPv6 Multicast Address

Sometimes you may have a situation that IMM does not have a L3 connection that you need to go to Data-center and connect from your laptop to server IMM interface via Ethernet cable. Imagine a situation that your organization infrastructure was not documented very well that you do not know the IPv4 address of IMM interface to login. If server IMM interface enabled with IPv6, then you are lucky – By using below methods you can easily figure out the IPv6 address of IMM interface and use it to connect to login IMM.

Highly available Load-balancer for Kubernetes Cluster On-Premise - II

In the first post of this series, haproxy and keepalived installed, configured and tested. In this post, two stateless Kubernetes web application will be deployed and domain names will be registered to DNS for these two web applications to test if Load-balancer is working as expected. Note: For my home-lab, I am using the domain nordic.io. For the Kubernetes cluster, I am assuming that, nginx Ingress controller deployed as DaemonSet and listening on port 80 and port 443 on each worker node.