How 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 minOct 20, 2026How 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.
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