Clustering Raspberry Pi Zeros with GPIO Ethernet is feasible but requires careful attention to hardware limitations, network stability, and OS tuning.
Intermittent ECONNREFUSED errors from an AWS NLB in front of ingress-nginx during scaling are typically caused by health check mismatches, connection draining, or backend misconfigurations.
Use environment-specific pipelines with Azure DevOps variables, resource groups, and Kubernetes namespaces to isolate deployments across dev, QA, UAT, and prod with controlled promotion paths.
Envoy acts as a sidecar proxy in Apigee setups, handling traffic management, observability, and security between services.
Monitor reconciliation latency, API rate limits, and cluster sync frequency to detect GitOps hub bottlenecks early.
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