Vagrant is a command-line tool for creating and managing reproducible local development environments backed by virtual machines. Combined with VirtualBox as a hypervisor, it lets developers spin up a fresh Linux VM with a single command, configure it through a version-controlled Vagrantfile, and destroy it just as easily. This eliminates the “works on my machine” […]
Sonatype Nexus Repository Manager is a universal binary repository that centralizes storage and distribution of build artifacts across your organization. It supports Maven JARs, npm packages, Docker images, Python packages, RubyGems, and more — acting as both a proxy for upstream registries and a private hosted repository. In large teams and CI/CD pipelines, Nexus reduces […]
SonarQube is an open-source static code analysis platform that continuously inspects source code for bugs, security vulnerabilities, code smells, and technical debt across 30+ programming languages. It integrates with CI/CD pipelines (Jenkins, GitLab CI, GitHub Actions) to provide automatic quality gates — blocking merges or deployments when code quality metrics fall below defined thresholds. SonarQube […]
ArgoCD’s GitOps model for Kubernetes delivery moves beyond traditional push-based CI/CD (where a pipeline runs kubectl apply) to a pull-based reconciliation loop where ArgoCD continuously monitors Git repositories and automatically brings the cluster state into alignment with the declared desired state. For production organisations, ArgoCD’s most powerful features are: ApplicationSets (templated applications that generate multiple […]
Helm is the standard Kubernetes package manager — a single helm install command deploys a complete application stack by rendering and applying a collection of templated Kubernetes manifests called a chart. Beyond basic installation, Helm provides powerful package management workflows: multiple simultaneous releases of the same chart with different configurations, chart dependencies (a parent chart […]
GitHub Actions self-hosted runners allow running GitHub Actions CI/CD workflows on your own infrastructure instead of GitHub’s shared runners. This is essential when workflows need to: access private network resources (internal databases, Docker registries, Kubernetes clusters), use specialised hardware (GPUs, large memory), comply with data residency requirements, or reduce GitHub Actions billing costs for high-volume […]
Terraform’s power lies in its ability to provision real cloud infrastructure — virtual machines, networks, databases, DNS records, load balancers, and Kubernetes clusters — using declarative configuration. A Terraform configuration describes the desired end state, and Terraform calculates and executes the actions needed to reach that state. Key concepts in practice are: resources (infrastructure objects […]
Terraform is HashiCorp’s open-source Infrastructure as Code (IaC) tool that allows provisioning and managing cloud infrastructure (VMs, databases, networks, DNS records, Kubernetes clusters) using declarative configuration files. Unlike Ansible (which is primarily a configuration management tool that executes tasks imperatively), Terraform maintains a state file that tracks the real-world infrastructure it manages — allowing it […]
Ansible playbooks are YAML files that describe the desired state of a set of managed servers using a series of tasks. Advanced playbook authoring goes beyond simple task lists to include: roles (reusable, shareable task bundles with a standard directory structure), handlers (tasks triggered only when a change occurs, such as restarting Nginx only when […]
Ansible is an open-source IT automation tool developed by Red Hat that allows managing server configuration, application deployment, and task automation using human-readable YAML playbooks. Unlike Chef or Puppet (which require agents installed on managed nodes), Ansible is agentless — it connects to managed servers via SSH and executes tasks using Python, with no permanent […]
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