How to Fix 502 Bad Gateway and 504 Gateway Timeout Errors (2026)
Fix 502 Bad Gateway and 504 Gateway Timeout step by step: find which hop generated the error, read NGINX upstream errors, fix keepalive and idle timeout mismatches (ALB 60s, GCP 600s), Kubernetes readiness and rollout gaps, Gateway API timeouts and Cloudflare 520 to 526.
15 minOct 20, 2026How to Fine-Tune an LLM with LoRA Using Unsloth or TRL (2026)
Step-by-step LoRA and QLoRA fine-tuning of an open-weight LLM with Unsloth 2026.10 or Hugging Face TRL 1.16: dataset format, hyperparameters, GPU memory, training script, evaluation against the base model, GGUF and vLLM export, and fixes for OOM and loss problems.
14 minOct 20, 2026How to Detect Runtime Threats with Falco on Kubernetes (2026)
Step-by-step Falco 0.45 setup on Kubernetes: Helm chart 9.2.0 with the modern eBPF driver, default and custom rules, Falcosidekick alerts to Slack, tuning noise, Falco Talon response actions, drop metrics, and a troubleshooting table for driver errors.
15 minOct 20, 2026How to Use External Secrets Operator with Vault on Kubernetes (2026)
Step-by-step External Secrets Operator v2.13 setup with HashiCorp Vault, OpenBao or AWS Secrets Manager: Helm install, Kubernetes auth, ClusterSecretStore, ExternalSecret, rotation and reloads, ESO's 2025 release pause, alternatives, and fixes for SecretSyncedError.
14 minOct 20, 2026How to Deploy vLLM on Kubernetes with GPUs: Step-by-Step (2026)
Deploy vLLM v0.32.0 on Kubernetes with NVIDIA GPUs: install GPU Operator v26.7.2, cache model weights on a PVC, serve an OpenAI-compatible API, autoscale on vllm:num_requests_waiting with KEDA, and fix CUDA out of memory and slow startup errors.
15 minOct 20, 2026How to Deploy an ML Model on Kubernetes with KServe 0.21 (2026)
Step-by-step KServe v0.21.0 guide: install in Standard mode with Helm, cert-manager and Gateway API, deploy scikit-learn and Hugging Face/vLLM InferenceServices, add HPA or KEDA autoscaling, canary rollouts, GPUs, and fix InferenceService not ready.
14 minOct 20, 2026How to Scan Container Images with Trivy and Grype (2026)
Step-by-step guide to scanning container images with Trivy v0.76 and Grype v0.121: verified installs after the March 2026 Trivy compromise, image and SBOM scans, CI gates on fixable criticals, .trivyignore, VEX, and fixes for DB download errors.
12 minOct 20, 2026How to Run Chaos Experiments on Kubernetes with Chaos Mesh (2026)
Step-by-step Chaos Mesh 2.8.5 guide: install with Helm on containerd, opt namespaces in, write PodChaos, NetworkChaos and StressChaos YAML, gate experiments on a Prometheus SLO, schedule them, and run the same test with a LitmusChaos promProbe, plus a troubleshooting table.
16 minOct 20, 2026How to Set Up cert-manager with Let's Encrypt and Fix Errors (2026)
Install cert-manager v1.21 with Helm, create Let's Encrypt ClusterIssuers for HTTP-01 (Gateway API or Ingress) and DNS-01, then debug a Certificate stuck not ready by walking CertificateRequest, Order and Challenge, with rate limits, ARI and alerts.
14 minOct 20, 2026How to Do Canary Deployments with Argo Rollouts 1.10 (2026)
Step-by-step Argo Rollouts canary guide for 2026: install v1.10.1 with Helm and the Gateway API plugin v0.17.0, write a Rollout with weighted steps, add a Prometheus AnalysisTemplate, watch automated rollback, and fix the common errors.
14 minOct 20, 2026How to Build an MCP Server in Python and TypeScript (2026)
Build, test and ship an MCP server on the official SDKs: Python mcp 2.3.0 and TypeScript @modelcontextprotocol/server 2.3.1, with tools, resources, prompts, MCP Inspector, Claude Desktop, Claude Code and VS Code config, stateless HTTP, and packaging.
15 minOct 20, 2026How to Build an AI Agent With Tool Calling in Python (2026)
Build an AI agent from scratch in Python with the Anthropic Messages API: tool schemas, an agent loop driven by stop_reason, tool errors with is_error, max iterations, token budgets, JSON logs, and a second provider through an OpenAI-compatible API.
19 minOct 20, 2026How to Write a Blameless Postmortem: Template and Examples (2026)
A step-by-step guide to writing a blameless postmortem: when one is required, building the timeline from evidence, contributing factors instead of one root cause, why the 5 Whys misleads, owned action items, the review meeting, and a copy-paste markdown template.
15 minOct 20, 2026How to Set Up Backstage as an Internal Developer Portal (2026)
Step-by-step Backstage 1.55 setup for 2026: create-app on Node 22 or 24, PostgreSQL, GitHub sign-in, catalog-info.yaml, software templates, TechDocs, a Kubernetes deploy with the official Helm chart, alternatives, and fixes for common errors.
14 minOct 20, 2026How to Reduce AWS Lambda Cold Starts: Init Duration to SnapStart (2026)
Step-by-step guide to measuring and reducing AWS Lambda cold starts in 2026: read Init Duration, price the August 2025 INIT billing change, pick runtime and arm64, bundle and lazy-load, tune memory, enable SnapStart and provisioned concurrency, and fix common errors.
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