mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2026-08-28 20:06:14 +00:00
Chris LuandGitHub
173adbc291
* master: never re-seed a raft cluster over committed state -raftBootstrap deleted logs.dat, stable.dat and snapshots on every start and then bootstrapped a fresh cluster. Since hashicorp raft only snapshots after 8192 log entries, the TopologyId lives in the log, not in a snapshot, so the pre-wipe snapshot recovery found nothing and each restart minted a new cluster identity. A master that came up while it could not reach its peers seeded a rival cluster; when the two logs met, SetTopologyId's split-brain guard fatally stopped every master holding the other id, and the master layer crash-looped with no quorum. Bootstrapping is genesis. Drop the wipe and the inline bootstrap. The first master in -peers already mints a cluster once it has confirmed no peer has a leader, so the flag has nothing left to do and is now ignored; keeping that one master the sole bootstrap authority is what stops a partition from minting two clusters, so the flag must not widen it either. A master with state rejoins its peers, and one whose data dir was reset is admitted by the sitting leader instead of forking again. * test: cover -raftBootstrap restarts in the multi-master suite Three masters start with -raftBootstrap, the way the helm chart renders it on every master on every roll, and the cluster has to hold one TopologyId after they all restart. /dir/status is proxied to the leader, so each master's own view of the identity is read out of its log, which is where a fork shows up. Before the fix the hashicorp case minted a new id on each restart.