In the world of modern DevOps, continuous integration and delivery (CI/CD) have become essential practices for ensuring fast, reliable, and scalable software deployment. GitLab has emerged as a powerful platform that offers built-in CI/CD capabilities, making it an attractive choice for teams looking to streamline their development pipelines — especially when deploying to production environments. […]
Setting up an configuring Kubernetes cluster on Ubuntu server
There are various ready-made implementations of Kubernetes (K8S) cluster, for example: Using one of the ready-made implementations is a quick and reliable way to deploy the Docker container orchestration system. However, we will consider manually creating a Kubernetes cluster of 3 nodes – one master (for management) and two worker nodes (for running containers). To […]
How to populate devices in Netbox with Python.
Hi there! If you’re looking to automate the process of adding devices to Netbox, using Python and the Netbox API is a great way to do it. In this post, I’ll walk you through the steps of adding a single device to Netbox using the pynetbox module. To start, you’ll need to install the pynetbox […]
How to extend the root partition with LVM and extend EXT4 file system.
In Linux, Logical Volume Manager (LVM) is a useful tool that allows you to manage your disk partitions in a more flexible way. With LVM, you can create logical volumes that span multiple physical disks and dynamically resize them without the need to reboot your system. If you need to extend the root partition of […]
How to extend the root partition with LVM and extend XFS file system.
If you need to increase the storage capacity of your root partition, you can do so by extending the Logical Volume Manager (LVM) and the XFS file system. Here’s a step-by-step guide on how to do this on a CentOS 7 system: After running these commands, your root partition will have been extended, and your […]
How to Install Gitlab CI on docker-compose
In this tutorial, we’ll look at how to quickly set up your GitLab server on Docker containers behind an NGINX reverse proxy. It is assumed that you already have the Docker and Compose application containerization engine installed, as well as the NGINX reverse proxy server. The GitLab server will be available at gitlab.automationtools.me. Also, do […]
Setting up CI / CD in GitLab to synchronize the project with web servers
Runner in GitLab allows you to automate routine tasks when updating projects in a repository. In our example, we will consider a situation where we use a GitLab server to store a project and 5 web servers where changes should go after a git push. We will set up our CI/CD to sync files with […]
Installing GitLab CI on Ubuntu
Server preparation: Let’s first update the list of packages in the repositories, set the correct time and open ports in the firewall. Update package lists: Set the timezone: To automatically synchronize the time, install the package: And enable autostart of the service: Firewall settings: By default, Ubuntu’s firewall is set to accept any packets. But […]
TCPdump – completely guide. How to use tcpdump.
Listing network interfaces in tcpdump: In order to show a list of network interfaces used in the system, you must specify the -D parameter Capturing packets from a specific network interface By default, Tcpdump listens on the lowest numbered network interface in the list. to listen on a specific network interface, you must use the […]