Tag: DEVOPS
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When Automation Becomes the Enemy: Lessons from AWS’s October 2025 DynamoDB Outage
The AWS post-mortem reveals a significant service disruption from October 19-20, caused by a race condition within their DNS management. This incident underscores the complexity of automation and the necessity of manual override procedures. It highlights the cascading failures from a single issue and the importance of mapping service dependencies and preparing for unexpected incidents.
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Cloud vs Open-Source: Comparing AWS, Azure, GCP Services
Modern enterprises must choose between cloud-native services from providers like AWS, Azure, and Google Cloud, and open-source tools that offer more control. This guide discusses key domains including Machine Learning, Data Engineering, DevOps, and Business Intelligence, comparing strengths, weaknesses, and use cases for each solution to help inform decisions.
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Ansible Command Cheat Sheet
📦 Core Commands Command Description Example ansible Run ad-hoc commands with modules ansible all -i inventory.yaml -m ping ansible-playbook Execute a playbook ansible-playbook -i inventory.yaml site.yaml ansible-doc View module or plugin documentation ansible-doc copy ansible-config Display current configuration ansible-config list ansible-inventory Inspect or validate your inventory ansible-inventory -i inventory.yaml –list ansible-vault Encrypt/decrypt sensitive files ansible-vault…
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A Fast Start with Ansible: Managing Your Servers Like a Pro
Ansible provides an agentless method to manage infrastructure, including cloud and physical servers. This guide covers project setup, secure password management with Vault, and execution of playbooks. It emphasizes the importance of inventory structure, common CLI commands, and troubleshooting tips, enabling users to automate their environments effectively.
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How to Fix SSH “Client_loop: send disconnect: Broken pipe” Error
The Client_loop: send disconnect: Broken pipe error in SSH occurs due to inactivity, leading to connection loss. To resolve it, configure SSH to send keep-alive messages by modifying the server’s SSH daemon settings or using client command-line options. These changes help maintain uninterrupted SSH access and enhance productivity.
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Practical Guide: Debugging Kubernetes Nodes and Managing Docker in Custom Setups
This guide addresses troubleshooting Kubernetes Node NotReady issues, configuring SSH and hostnames, fixing kubectl connection errors, and setting up a private Docker registry. It also covers accessing NodePort services and suggests advanced practices like using TLS for Docker registries. Additional learning resources are recommended for skill enhancement.
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Running Local Docker Images in Minikube: A Quick Guide
Minikube allows you to run a single-node Kubernetes cluster locally, making it ideal for testing and development. However, Kubernetes typically pulls images from remote registries, which can be cumbersome when working with local Docker images. This guide explores two efficient methods to use your local Docker images within a Minikube cluster. Method 1: Load Local…
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Updating Deprecated Commands in “Kubernetes in Action”
The post reviews the book “Kubernetes in Action” by Marko Luksa, highlighting deprecated commands in Kubernetes as it evolves. It updates commands for managing ReplicaSets instead of ReplicationControllers, emphasizes using deployments for scaling and updates, and suggests using declarative management for better resource management in Kubernetes.
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Troubleshooting Kubernetes Service Exposure with Minikube
This blog post outlines troubleshooting steps for exposing a service in Kubernetes while addressing deprecated commands. Initially, the author updated the command for deployment. After encountering LoadBalancer issues in Minikube, a switch to NodePort was made. Following further connectivity issues, port forwarding and Minikube tunnel were used to access the service successfully.
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A Comprehensive Guide to Kubernetes Toolchains for Microservices
Kubernetes is essential for managing containerized applications and microservices, enabling automation, scaling, and management. A guide discusses crucial tools categorized for command-line, cluster management, development, deployment, and monitoring. These tools, like kubectl and Helm, enhance workflows, facilitate smoother deployment, and assist in performance monitoring, optimizing the Kubernetes experience.
Johngai’s Tech Forge 