Tutorials
Seamless Deployment: Blue/Green vs Canary Trade-off Analysis
This post provides a technical deep dive into Blue/Green and Canary seamless deployment strategies, examining their trade-offs and real-world applications.
#infrastructure
31 posts found.
Technology
Why is VLAN Segmentation Overhyped in Small Networks?
I share my experiences on the administrative burden, performance losses, and practical alternatives of VLAN segmentation in small-scale networks.
Technology
Self-Hosted Runner vs SaaS: Which is More Cost-Effective?
Does using self-hosted runners in CI/CD processes truly save money? I compared hidden costs, hardware resources, and operational overhead.
Career
GitOps vs Push-Based CI/CD: Which One for Consulting?
Based on my hands-on field experience, I compare GitOps and push-based CI/CD approaches. Which one should we choose for different scenarios?
Technology
VLAN Segmentation: Balancing Security and Performance
I explain how I strike a balance between performance and security when moving from a flat network to VLAN segmentation, sharing technical details from my field.
Tutorials
The Load Balancer's Silent Betrayal: Misrouted Traffic
A deep look at how load balancer (Load Balancer) misconfigurations affect system performance and the issues that cause traffic to get misrouted.
Technology
Operational Crises I Have Faced Running GitOps for Cloud…
The operational crises I keep running into when I manage cloud infrastructure with GitOps — and the patterns that have helped me avoid the worst of them.
Technology
BMC (iDRAC/iLO/IPMI) Hardening and Management Segmentation
An operating model for the BMC (iDRAC/iLO/IPMI) attack surface using segmentation, identity, audit, and break-glass to keep it secure and auditable.
Technology
Path Selection and Incident Triage with SLA Probes in SD-WAN
Choosing the right path for application classes via active probes that measure latency/jitter/loss; rapid diagnosis during degradation and a controlled…
Tutorials
Kubernetes Control Plane Certificate Expiry: A Runbook
When API Server access suddenly breaks with x509 errors; certificate renewal and safe recovery steps for kubeadm-based clusters.
Tutorials
Golden Image Pipeline with Packer: CIS Baseline and Patch Strategy
A golden image approach that hardens and tests the server image at build-time, accelerating patch, drift and emergency CVE workflows.
Tutorials
Terraform CI Guardrails: Plan/Apply, Drift, and Policy Check
Balancing safety and speed in IaC: a guide to managing prod changes through plan/apply separation, drift detection, policy-as-code, and approval flows.
Tutorials
vSphere/ESXi Host Patch: Maintenance Wave and Rollback Runbook
Manage the ESXi host patch process with ring-based maintenance waves, control capacity/HA risk, and establish safe remediation and rollback discipline.
Technology
Object Storage with Ceph: Failure Domain and Recovery Design
Beyond installing Ceph: an architectural approach to failure domain, capacity, and recovery behavior so the cluster can actually heal during a fault.
Technology
Time Synchronization in Critical Systems: NTP, PTP and Observability
An architectural, security-focused, and operational view of NTP/PTP for distributed systems where TLS, log correlation, and consistency depend on accurate time.
Technology
Kernel Live Patching and a Maintenance Model on Enterprise Linux
Managing kernel security patches without reboot pressure: a live-patch approach, the risks, a ring strategy, and operational discipline.
Tutorials
An NTS and NTP Hardening Runbook with chrony
A practical chrony runbook for enterprise servers covering secure NTP (NTS), access restrictions, verification commands, and alarm thresholds.
Tutorials
A Maintenance-Wave Runbook for Firmware Upgrades on Enterprise…
A runbook that turns firmware upgrade work into a repeatable maintenance rhythm with inventory, ring/wave approach, validation metrics, and a rollback…
Tutorials
A WORM Backup Layer Runbook with S3 Object Lock
Practical steps for building a WORM (Write Once Read Many) layer against ransomware and accidental deletion using S3 Object Lock, retention policies, and…
Technology
Enterprise Edge Resolver Architecture with Anycast DNS
An approach for placing the in-house DNS resolver tier near the POP/branch using Anycast — cutting latency while improving operability.
Technology
Secure Boot + TPM: A Root of Trust for Server Infrastructure
A practical model for making the trust chain from firmware to kernel measurable, without locking operations down in the process.
Tutorials
Enterprise NTP Architecture with Chrony, and Drift Alerting
Chrony settings, firewall recommendations, and drift/loss alarms to design a hierarchical and secure time synchronization.
Tutorials
High Availability and Split-Brain Runbook with Redis Sentinel
A field-ready runbook for operationally managing quorum, failover, and split-brain risk in a Redis Sentinel-based HA setup.
Tutorials
Policy-Based Routing and Backup Link Design with Netplan
Set up a policy-based routing layout on Linux servers with Netplan that separates primary and secondary uplinks based on source network.
Tutorials
Regional DNS Cache and Forwarder Separation with Unbound
A clean guide for separating resolution traffic across enterprise segments by configuring cache, forwarder, and access control with Unbound.
Technology
Secret Key Distribution Plane in ERP Infrastructures
A central secret key distribution architecture that reduces the burden of secret handling across ERP integrations and batch flows.
Technology
Migration Strategy to an L3 Clos Fabric in Enterprise Networks
An architectural roadmap for moving from layered bottleneck designs to an L3 Clos fabric in growing data center networks.
Technology
Active-Passive Disaster Recovery for ERP Infrastructure
The fundamentals of building a realistic active-passive recovery model for ERP systems, covering data consistency, network routing, and operational roles.
Technology
DNS-Based Service Routing in Enterprise Networks
A framework for treating the DNS layer as a service routing and resilience control point, not just a name resolution service.
Tutorials
IPAM and Inventory Automation with NetBox
A NetBox approach for moving the network address plan and data center inventory out of ticket spreadsheets and into an automation-friendly model.
Tutorials
Privileged Access with Short-Lived Certificates
A guide to managing privileged access safely by using short-lived certificates instead of permanent SSH keys.