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feat(ha-prevote): rewire failover triggers through PreVote, defer destructive step (task 4.2)

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ha_on_primary_ctrl_fd_rdhup + liveness_poll_fn now begin a PreVote round via
ha_begin_failover -> ha_start_prevote_async instead of electing directly; WAL
truncate + CTRL_ELECTING deferred to PreVote WON (ha_enter_real_election).
Connection teardown + config-less voter guard preserved at the trigger.
ha_on_heartbeat_received cancels an in-progress round and re-attaches as standby
with no term change. Single-node immediate-WON synchronously enters the real
election. PreVote now live; full controller suite 563 pass / 0 fail; bug-339/340
preserved.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Rongsong Shen 2026-06-16 06:29:18 +00:00
parent 7e19bf6110
commit b765fc4705
6 changed files with 492 additions and 124 deletions
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2
src/controller/testsuite/controller_test.c
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@ -50,6 +50,7 @@ extern void test_ha_connection_reuse(void);
extern void test_ha_rdhup_integration(void);
extern void test_ha_liveness(void);
extern void test_ha_prevote(void);
extern void test_ha_failover_prevote(void);
extern void test_commit_engine(void);
extern void test_commit_barrier_rollout(void);
extern void test_commit_barrier_reply(void);
@ -176,6 +177,7 @@ int main(int argc, char* argv[])
TEST(test_ha_rdhup_integration);
TEST(test_ha_liveness);
TEST(test_ha_prevote);
TEST(test_ha_failover_prevote);
TEST(test_commit_engine);
TEST(test_commit_barrier_rollout);
TEST(test_commit_barrier_reply);