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DevOps & observability · #kubernetes
When a Gardener Shoot enters ProvisioningFailed with a credential error, the root cause is usually a missing or malformed Secret in the seed cluster. This guide shows how to verify the Secret, validate keys, test API connectivity, and apply fixes.
Learn how to use Helm umbrella charts and dependencies to manage multi-service Kubernetes deployments, centralize configuration, and ensure version consistency.
Learn how a PodDisruptionBudget limits voluntary pod evictions during node drains, keeping replica counts above a safe threshold while avoiding overly restrictive settings that can block maintenance.
Learn how Argo CD ApplicationSet eliminates repetitive Application manifests by generating one Application per cluster from a single template, with a concrete List‑generator example and guidance on limits.
Learn how to import a running K3s cluster into Rancher using the cluster registration agent, enable monitoring, and deploy Helm charts while preserving the cluster’s original lifecycle.
Step‑by‑step guide to deploy an HPA that scales a sample nginx Deployment based on CPU utilization, with checks and rollback options.
Learn how to use Helm Hooks to manage prerequisite tasks like database migrations, ensuring your Kubernetes resources deploy in the correct order.
Step‑by‑step diagnostic guide for troubleshooting Gardener Shoot API server unavailability, covering etcd quorum, pod resources, network policies, node taints, and cloud load balancer checks.
This guide helps troubleshoot Talos node network failures—diagnose interface status, static IP, firewall, TLS, MTU, DNS, and apply fixes with talosctl. Includes a concrete example and verification checklist.
gardener
helm
argocd
rancher
k3s
talos