docs(adr): leader-priority raft config change basement#437
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Proposes the internal design for a CM-driven leader-priority change API: PG sb as source of truth for CM intent, a new HS_CTRL_SET_LEADER_PRIORITY journal entry to propagate intent to every replica, and an enhanced reconcile_leader as the convergence engine driving NuRaft cluster_config to match PG sb. Includes a defense-in-depth fix for the replace_member PG-sb divergence (on_pg_start_replace_member propagates out's priority to in to preserve leader intent across membership swaps). Status: Proposed Signed-off-by: Xiaoxi Chen <xiaoxchen@ebay.com>
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Proposes the internal design for a CM-driven leader-priority change API: PG sb as source of truth for CM intent, a new HS_CTRL_SET_LEADER_PRIORITY journal entry to propagate intent to every replica, and an enhanced reconcile_leader as the convergence engine driving NuRaft cluster_config to match PG sb. Includes a defense-in-depth fix for the replace_member PG-sb divergence (on_pg_start_replace_member propagates out's priority to in to preserve leader intent across membership swaps).
Status: Proposed