Latest Blogs
Tutorials, guides, and insights on DevOps, SRE, and Cloud technologies.
CloudWatch — Logs, Metrics, Alarms, and Dashboards That Save You at 3 AM
Master AWS CloudWatch with real examples. Learn custom metrics, CloudWatch Alarms, Logs Insights queries, dashboards, the CloudWatch Agent, and cost optimization strategies for logging.
Azure Monitor — Logs, Metrics, Alerts, and Application Insights
Set up full-stack observability with Azure Monitor — collect metrics and logs, write KQL queries, configure alert rules and action groups, instrument apps with Application Insights, and manage monitoring costs.
Configuration Management — Ansible, Chef, and Puppet Compared
Compare configuration management tools — Ansible, Chef, and Puppet — with practical examples, architecture differences, and guidance on choosing the right tool.
Docker Environment Variables — .env Files, Secrets, and Config Management
Master Docker environment variables — ENV vs ARG, .env files, Compose variable substitution, secrets management, and multi-environment configuration following the 12-factor app methodology.
Kubernetes Networking — CNI, Pod-to-Pod, and DNS Deep Dive
Understand the Kubernetes networking model from the ground up. Covers CNI plugins (Calico, Cilium, Flannel), pod-to-pod communication, kube-proxy modes, CoreDNS service discovery, NetworkPolicy microsegmentation, and network troubleshooting techniques.
Linux Firewalls — iptables, nftables, and UFW Explained
Secure your Linux servers with hands-on firewall configuration using iptables, nftables, and UFW. Practical rules for SSH access, blocking IPs, rate limiting, and NAT.
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