Containers

How to Install Nexus Repository Manager on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Nexus Repository Manager on RHEL 9

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 […]

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How to Set Up ArgoCD for GitOps on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up ArgoCD for GitOps on RHEL 9

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 […]

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How to Install and Use Helm for Kubernetes Package Management on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install and Use Helm for Kubernetes Package Management on RHEL 9

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 […]

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How to Register a GitHub Actions Self-Hosted Runner on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Register a GitHub Actions Self-Hosted Runner on RHEL 9

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 […]

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How to Use Terraform to Provision Infrastructure on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Use Terraform to Provision Infrastructure on RHEL 9

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 […]

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How to Install Terraform on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Terraform on RHEL 9

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 […]

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How to Configure GitLab CI/CD Pipelines on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure GitLab CI/CD Pipelines on RHEL 9

GitLab CI/CD is GitLab’s built-in continuous integration and delivery system that automatically runs pipelines when code is pushed to a repository. Unlike Jenkins (which requires a separate server and complex plugin configuration), GitLab CI/CD is fully integrated with the GitLab platform — pipelines are defined in a .gitlab-ci.yml file in the repository root and run […]

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How to Configure Jenkins Pipelines and Jenkinsfile on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Jenkins Pipelines and Jenkinsfile on RHEL 9

Jenkins Pipeline (formerly Workflow) allows defining the entire CI/CD build, test, and deploy process as code in a Jenkinsfile committed to the source repository alongside the application code. This “Pipeline as Code” approach means the build process is version-controlled, reviewable via pull requests, and reproducible across environments. Jenkins supports two Pipeline syntaxes: Declarative Pipeline (structured, […]

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How to Set Up a Kubernetes Dashboard on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up a Kubernetes Dashboard on RHEL 9

The Kubernetes Dashboard is a general-purpose, web-based UI for Kubernetes clusters that allows users to manage applications, inspect cluster resources, view logs, and troubleshoot issues without using the kubectl CLI. It provides a visual overview of all workloads in the cluster — deployments, pods, services, ingress rules, storage, and RBAC configuration — making it accessible […]

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How to Configure Docker Daemon TLS Encryption on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Docker Daemon TLS Encryption on RHEL 9

By default, the Docker daemon socket (/var/run/docker.sock) is a Unix socket accessible only locally. When the Docker daemon needs to be accessible over the network — for remote Docker management, CI/CD pipelines connecting to a remote build host, or Docker Swarm cluster communication — TLS encryption must be configured to prevent man-in-the-middle attacks and unauthorised […]

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