We share professional insights on cloud-native, DevOps & operations, Kubernetes, observability & monitoring, and Linux systems.
This article introduces OpenStack as an open‑source cloud computing platform, outlines its ten core services such as Nova, Swift, and Keystone, highlights key characteristics like openness and modularity, and discusses typical public, private, and hybrid cloud deployment scenarios.
This article introduces Karma, a Docker‑deployed Prometheus alert dashboard that aggregates multiple Alertmanager instances, explains its installation requirements, and details key features such as visual alert aggregation, tag‑based grouping, and silence management, positioning it as a valuable operations tool.
This article introduces Elasticsearch, an open‑source distributed search and analytics engine, explaining its architecture, core concepts such as clusters, nodes, shards, replicas, indices, inverted indexes, documents and fields, and how these components enable fast, scalable searching and data analysis.
This article introduces four leading open‑source container platforms—Docker, Podman, Containerd, and CRI‑O—detailing their core features, architecture, and use‑case advantages, helping readers understand each product’s strengths and suitability for modern cloud‑native and micro‑service deployments.
Google Cloud mistakenly deleted data and backups for Australian pension fund UniSuper, causing over 600,000 members to lose access for more than a week, and the incident highlights the risks of single‑provider reliance, the importance of robust backup strategies, and the growing relevance of hybrid and multi‑cloud architectures.
Prometheus, a leading monitoring system, can achieve high availability through several common architectures—including dual-node with external storage, federated mode with external storage, and multi-node clusters combined with Thanos and object storage—each offering data persistence and load distribution to enhance system stability and performance.
This article explains what Kernel-based Virtual Machine (KVM) is, outlines its key benefits such as high performance, security, stability, cost‑effectiveness and flexibility, and describes how it operates on Linux systems using kernel modules and supporting packages.
The article outlines essential DevOps and agile practices—including Scrum, Kanban, continuous integration, continuous delivery, monitoring, micro‑services, automation, and security—to improve collaboration, increase release frequency, and deliver higher‑quality software faster.
This article demonstrates how to set up Prometheus alerting rules to monitor Kubernetes Pod phases, explains the different Pod states, provides example alert expressions, and discusses practical solutions to avoid false alarms during deployments.
This article explains how to use Docker's image management commands—including search, pull, list, inspect, remove, prune, save, and load—to efficiently handle container images, filter results, and clean up unused resources.
