Troubleshooting Guides

The GitLab CI error "dial tcp lookup docker no such host" means the docker:dind service alias never resolved. Here is the fast fix and the real causes.

The GitLab CI error Cannot connect to the Docker daemon at unix:///var/run/docker.sock means DOCKER_HOST is unset. Here is the fast fix.

A Flux SOPS MAC mismatch means an encrypted file was changed outside sops. Diagnose it and re-encrypt cleanly so kustomize-controller can decrypt again.

vLLM crashing with torch.cuda.OutOfMemoryError on Kubernetes? Tune gpu_memory_utilization, tensor_parallel_size, max_num_seqs, and max_model_len to fix it fast.

Your GitHub Actions job fails with 'Resource not accessible by integration' because GITHUB_TOKEN is read-only by default. Grant the exact scope it needs.

OpenTofu throws "Ephemeral value used in non-ephemeral context" when a temporary value leaks toward state. Here is what triggers it and the exact fix.

Detect, block, and patch CVE-2026-20245 critical RCE in Cisco SD-WAN Manager with firewall rules, iptables workaround, and official upgrade steps. Verify fix.

Learn how to fix the 'Not authorized to perform sts:AssumeRoleWithWebIdentity' error in EKS by aligning IAM role trust policies with OIDC provider settings.

Diagnose and fix ArgoCD OutOfSync errors with empty diffs caused by finalizers, aggregated RBAC, mutating webhooks, and metadata drift using CLI commands and...

Resolve 'Client.Timeout exceeded' errors in OpenTofu by increasing the HTTP timeout to 120s, enabling plugin cache, or using a registry mirror. Quick fixes for...

Fix the 'Cannot connect to the Docker daemon at' error in GitLab CI. Learn to add docker:dind service, set DOCKER_HOST, and enable privileged mode for reliable...

Diagnose and fix the Flux SOPS 'illegal base64 data at input byte 0' error caused by incorrect base64 encoding. Step-by-step solutions for encrypted secrets and a...