backlog(B-0774 + B-0775): etcd-less options (kine adapter family) + HA-k8s-that-scales-beyond-etcd (CockroachDB / NATS super-cluster / Karmada / cell-based)#5061
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AceHack merged 1 commit intoMay 26, 2026
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… + HA k8s that scales beyond etcd (CockroachDB / NATS super-cluster / Karmada / Cluster API / cell-based) Aaron 2026-05-25 mid-iter-3-CI-wait, two questions in sequence: B-0774 'are there etcdless': yes — microk8s+Dqlite (native etcd-replacement); k3s+kine+(SQLite/Postgres/MySQL/NATS); kine is the load-bearing standard interface (per B-0765 ServiceTitan route — operator chooses backend; kine abstracts etcd v3 API). NATS JetStream backend particularly composes with B-0772 Rx fabric + B-0289 Reticulum mesh + B-0773 digital twin. B-0775 'ha installs of kubernets that scales better': scale ceiling depends on ARCHITECTURE choice not just BACKEND choice. Per-tier recommendation: 1-5 nodes (etcd or kine+SQLite); 5-50 (kine+NATS); 50-500 (kine+CockroachDB); 500-5000 (NATS super- cluster OR Karmada); 5000+ (cell-based + Karmada). Multi-region + edge + multi-tenant covered too. Zeta-native cell-based control plane = B-0766 wave 4+ endgame. Both sharpen B-0756 HA control-plane (which assumed etcd as the default HA path). B-0756 stays the simple-default; B-0774 adds backend-swap options; B-0775 adds architecture-scale options. Composes with B-0763 vendor-swap interface principle + B-0772/B-0773 fabric/twin. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Two related questions from Aaron mid-iter-3-wait, bundled into one PR (both backlog rows; no code):
B-0774 ('are there etcdless'): kine is the load-bearing standard interface; operator chooses backend (Dqlite via microk8s; SQLite / Postgres / MySQL / NATS via k3s+kine; Zeta-native DBSP+Raft via B-0766 wave 4). NATS JetStream backend particularly composes with B-0772 Rx fabric + B-0289 Reticulum + B-0773 digital twin.
B-0775 ('ha installs of kubernets that scales better'): scale ceiling depends on ARCHITECTURE not just BACKEND. Per-tier recommendation table covering 1-5 / 5-50 / 50-500 / 500-5000 / 5000+ / multi-region / edge / multi-tenant. Options include kine+CockroachDB, NATS super-cluster, Karmada (CNCF graduated), KubeStellar, vCluster, Cluster API, cell-based custom, Zeta-native cell-based (B-0766 wave 4+ endgame).
Both sharpen B-0756 HA control-plane. Compose with B-0289 / B-0763 / B-0764 / B-0765 / B-0772 / B-0773.