Linux Tips, Hacks, Tricks, and Tutorials
In Red Hat Virtualization earlier than version 4.4 SP1, all certificates followed a 398 day lifetime. Starting in Red Hat Virtualization version 4.4 SP1, the self-signed internal certificates between hypervisors and the Manager follow a five year lifetime. Certificates visible to web browsers still follow the standard 398 day lifetime and must be renewed once […]
Environment: Red Hat Virtualization 4.4 Issue: All the hosted-engine hosts vdsm certificates are expired. The hosted-engine VM is down and it’s unable to start it using hosted-engine –vm-start because of expired certificates. Resolution: Since CA of the RHV environment is the RHV manager which is down, we have to get the CA certificates and keys to the host […]
In the world of modern cloud-native applications, Kubernetes has become the go-to platform for container orchestration. Its ability to manage large-scale deployments, automate operations, and optimize resources is unmatched. However, the true power of Kubernetes lies in its redundancy mechanisms, which ensure that applications remain highly available, even in the face of failures. In this […]
Updating third-party SSL certificates on GitLab involves replacing the existing certificate files with the new ones and reconfiguring GitLab. Here’s how to do it 1. Obtain New SSL Certificates You can use my CSR Generator to generate a CSR and acquire the SSL certificate. – Acquire the updated SSL certificate and private key from your […]
To enable Let’s Encrypt SSL for GitLab, follow these steps. Ensure that GitLab is configured properly and you have root access to your GitLab instance. The steps apply to GitLab’s Omnibus installation. 1. Ensure Prerequisites A publicly accessible domain name pointing to your GitLab server. Port 80 (HTTP) and port 443 (HTTPS) open on your […]
You will need to do the following: SSH into your Droplet where GitLab is installed. ssh [your-user]@[your-droplet-ip-address] Open the GitLab Rails console. If you installed GitLab via the Omnibus package, you can open the Rails console with: sudo gitlab-rails console Locate the root user and change the password. Once in the console, enter the following commands: user = […]
Git is a powerful version control system that every developer should know. Whether you’re collaborating with others or managing your own projects, these 25 Git commands will help you navigate and control your codebase efficiently. 1. git init Initializes a new Git repository in your project directory. git init 2. git clone Clones an existing […]
Step 1 – Allocate Public IP for Ingress The following command will allocate Public IP : az network public-ip create –resource-group [resource-group] –name [name for public IP] –sku Standard –allocation-method static –query publicIp.ipAddress -o tsv Step 2 – Install NGINX Ingress Controller using Helm An ingress controller, because it is a core component of Kubernetes, […]
Pre Setup Once you’ve gained access to your terminal it might be wise to spend ~1 minute to setup your environment. You could set these: alias k=kubectl # will already be pre-configured export do=”–dry-run=client -o yaml” # k create deploy nginx –image=nginx $do export now=”–force –grace-period 0″ # k delete pod x $now Vim The […]
Setting Up Kubectl Autocomplete in Your Shell Environment Setting up kubectl autocomplete depends on the shell you’re using. Here are the options for the most common shells. Remember to replace kubectl with your chosen alias if you’re using one. For instance, if you’ve aliased kubectl as k, replace kubectl with k in the scripts below. […]