Operating systems, infrastructure, emulation, and technical history.
Resolve Terraform provider constraint conflicts using the requirement tree, required_providers, committed lock selections, checksums, and tested upgrades.
Configure Flagger canaries with metric gates, controlled traffic shifts, load tests, and automatic rollback while preserving operational safeguards.
Implement GitOps with Argo CD using pinned installation assets, constrained projects, safe automated sync, drift detection, and tested recovery.
Deploy Kubernetes NetworkPolicies with verified CNI enforcement, default-deny baselines, explicit DNS access, namespace labels, and negative tests.
Configure and test Kubernetes PodDisruptionBudgets for safe drains and upgrades without mistaking eviction limits for an availability guarantee.
Deploy and validate kube-prometheus-stack with persistent storage, secure Grafana access, bounded cardinality, alert routing, and recovery tests.
Build a reusable Helm chart with safe templates, documented values, schema validation, immutable images, release tests, and OCI packaging checks.
Docker donated containerd to the CNCF in 2017, giving the ecosystem a neutral, focused runtime foundation later adopted directly by Kubernetes.
Kubernetes 1.24 removed dockershim after a long deprecation, moving nodes to CRI-native runtimes without invalidating Docker-built OCI images.
Helm began at Deis in 2015, merged ideas with Deployment Manager, removed Tiller in Helm 3, and matured into Kubernetes package management.