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Kubernetes HA (kubeadm)
Kubernetes · by Tola Leng
Multi control-plane kubeadm cluster with Calico CNI and metrics-server.
PostgreSQL HA (Patroni + etcd)
Databases · by Tola Leng
3-node PostgreSQL HA cluster managed by Patroni with an embedded etcd v3 DCS. Installs PostgreSQL from PGDG, runs Patroni from a pinned Python venv, and manages everything via systemd. First node is the initial leader; use 3+ nodes for real HA.