In one of my Linux node, I was not able to use curl command if executed by a particular user(“root”). Strange enough, it was working when executed using some other user. If you face similar issue try to follow the following strategy to debug the issue: When executed with non-root User: curl google.com -I HTTP/1.1 …
Curl not working when executed by a particular user Read More »
Guacamole is an open-source and client-less remote desktop solution. By client-less, it means that a user does not need to install any additional client software(like vncviewer, windows RDP) on the local machine to remote login into the remote machine. Instead, Guacamole uses HTML5 to remote login to the remote device on any browser. However, if …
Countless predators are sitting in the wild to spam or attack the network. So sometimes, before trusting a random IP address on the Internet, it’s a good idea to check its reputation. There are multiple methods to check the details and reputation of an IP address, but here we are covering only one via “www.abuseipdb.com.” …
How to check the IP address reputation programmatically Read More »
Like listing the directories and files using the “ls” command, we can list hardware in the system using the “lshw” command. Various filters are available to filter the result of the “lshw” command based on the type of hardware, like disk, processor, etc. Please see the below examples and follow along. Note that to use …
Resources like CPU, Memory, Disk are critical for the performance of the node and the pods(containers) running on it. You can read a detailed post about these resources here. In this post, we will cover the commands for printing the resources in a short and meaningful format. A concise yet meaningful format is helpful for …
Get the Node Resource usage in Kubernetes – no plugin Read More »
This post will discuss Kubernetes Resources, Requests, and Limits. In the Kubernetes cluster, the scheduler chooses the best node to place a pod. To decide the best node, the scheduler makes decisions based on the availability of the resources like CPU, RAM, etc., on all the nodes. Then, the scheduler would place the Pod on …
In this post, we will run a security scan on a Kubernetes cluster using Kubescape. Some time back, NSA has released the Kubernetes cluster hardening guide; this guide provides several DOs and DON’TS. The problem is manually running the guide and testing the cluster for each recommendation is a big task. Here comes the need …
How to run a security scan on a Kubernetes Cluster Read More »
This post will do all the steps required to set up dynamic volume provisioning using NFS. We will be using a fresh Kubernetes cluster with no storage class provisioned. Unlike cloud environments, there are no storage provisioners available in the home environment by default. Sure, you can have it, but you need to configure it …
How to provision Dynamic Volumes(NFS) on a home lab? Read More »
Adding a Node to Kubernetes Cluster using Kubespray Kubespray is a great tool to create a production-ready Kubernetes cluster. However, Kubespray is not limited to spinning the cluster, and you can do many other cluster management operations using kubespray. E.g., scaling the cluster, upgrading the cluster, etc. In this post, we will see an example …
Converting video to GIF is easy and free. In this post, we will create a GIF file from a view on windows pro laptop. We will be using “FFMPEG” for creating GIF files. Note that FFMPEG is a vast tool and has many options to deal with media files. Therefore, we will only see the …
