How to Migrate From ingress-nginx to Gateway API: Step-by-Step (2026)
A tested, step-by-step ingress-nginx to Gateway API migration: inventory annotations, install Gateway API v1.6.3 and Envoy Gateway v1.9.2, convert with ingress2gateway v1.2.0, handle TLS, rewrites and canaries, read route status conditions, cut over with DNS and roll back.
13 minOct 20, 2026How to Run LLM Evals in CI with GitHub Actions (promptfoo, 2026)
Step-by-step: gate prompt and model changes with LLM evals in GitHub Actions using promptfoo 0.124 or DeepEval 4.3, with deterministic and LLM-as-judge assertions, pass-rate thresholds, caching, cost limits, PR comments and fixes for flaky evals.
14 minOct 20, 2026LiteLLM Proxy Setup: Docker, Virtual Keys, Budgets (2026)
Set up LiteLLM proxy v1.106 with Docker Compose or Helm: config.yaml, fallbacks, virtual keys with budgets and rate limits, plus fixes for common errors.
13 minOct 20, 2026How to Troubleshoot Linux Performance in 60 Seconds (2026 Checklist)
A step-by-step Linux performance troubleshooting guide for 2026: Brendan Gregg's 60-second checklist (uptime, dmesg, vmstat, mpstat, pidstat, iostat, free, sar, top), how to read each output, PSI, the USE method, then bpftrace 0.27 and BCC one-liners.
13 minOct 20, 2026How to Add Human-in-the-Loop Approval to a LangGraph Agent (2026)
Step-by-step LangGraph 1.2 guide: build a tool-calling agent with interrupt() approval before risky tools, persist it with the Postgres checkpointer, resume with Command, stream updates, deploy, and fix the common errors.
11 minOct 20, 2026How to Enforce Pod Security Standards with Kyverno 1.19 (2026)
Step-by-step: enforce Kubernetes Pod Security Standards with Pod Security Admission namespace labels and Kyverno 1.19 CEL policies. Helm install, audit then enforce, policy reports, mutate and generate policies, PolicyExceptions, and fixes for Kyverno webhook failures.
13 minOct 20, 2026How to Fix Kubernetes Pods Stuck in Pending: Causes and Commands (2026)
Pods stuck in Pending? Read the FailedScheduling event, then fix the cause: insufficient cpu or memory, untolerated taints, node affinity, unbound PVCs and volume zones, topology spread, quotas, scheduling gates, or Karpenter and Cluster Autoscaler not scaling.
12 minOct 20, 2026Fix Kubernetes OOMKilled and Exit Code 137: Step-by-Step Guide (2026)
How to fix OOMKilled and exit code 137 in Kubernetes: confirm the kill with lastState, tell a cgroup limit OOM from node OOM and eviction, read working set vs RSS, size JVM, Node.js, Go and Python memory to the limit, find leaks, and right-size with VPA and in-place resize.
12 minOct 20, 2026How to Write Kubernetes NetworkPolicies: Default Deny to Egress (2026)
Step-by-step Kubernetes NetworkPolicy guide for 2026: default deny, allowing DNS, namespace and pod selectors, egress control, Cilium and Calico support, ClusterNetworkPolicy v1alpha2, testing with netshoot, and a troubleshooting table for blocked traffic.
14 minOct 20, 2026How to Fix ImagePullBackOff and ErrImagePull in Kubernetes (2026)
Fix Kubernetes ImagePullBackOff and ErrImagePull step by step: read the real event message, then fix wrong tags, moved Bitnami images, imagePullSecrets, ECR and Artifact Registry node permissions, Docker Hub 429 rate limits and arm64/amd64 mismatches.
13 minOct 20, 2026How to Troubleshoot Kubernetes DNS and CoreDNS: Step by Step (2026)
A step-by-step guide to fixing Kubernetes DNS: test from a dnsutils pod, read resolv.conf and ndots:5, check CoreDNS pods, endpoints, logs and metrics, fix NXDOMAIN, SERVFAIL and i/o timeout errors, the 5-second conntrack race, and install NodeLocal DNSCache.
13 minOct 20, 2026How to Set Up Grafana Loki on Kubernetes with Alloy (2026)
Step-by-step Grafana Loki 3.7 setup on Kubernetes: the new grafana-community Helm chart, deployment modes, S3 storage, Grafana Alloy replacing end-of-life Promtail, labels vs structured metadata, LogQL, retention, and fixes for 429 and too many outstanding requests.
12 minOct 20, 2026How to Speed Up GitHub Actions CI: Caching, Sharding, Docker (2026)
A step-by-step guide to faster GitHub Actions in 2026: measure job timings, cancel stale runs, use setup-node, setup-python and setup-go caching, actions/cache v6, buildx type=gha layer caching, matrix test sharding and larger runners, plus a cache-miss troubleshooting table.
13 minOct 20, 2026How to Use GitHub Actions OIDC With AWS, GCP and Azure (2026)
Step-by-step GitHub Actions OIDC setup for AWS, Google Cloud and Azure with no stored secrets: trust policies pinned to sub claims, immutable subjects, environments, pinned actions, and fixes for sts:AssumeRoleWithWebIdentity, audience and AADSTS700213 errors.
14 minOct 20, 2026How to Fix Kubernetes CrashLoopBackOff: Causes and Commands (2026)
Fix Kubernetes CrashLoopBackOff step by step: what the state means, the 10s to 5 minute backoff and the new per-node max in 1.35+, kubectl describe and logs --previous, exit codes 1, 127, 137 and 143, probe and OOM causes, and kubectl debug for crashing containers.
13 min