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xiaomage
6eb200022e
Adds a fault-tolerance suite that verifies read/write behavior under drive and node loss against the erasure-coding contract and snapshots health-endpoint responses at every degradation tier. Scenarios are derived from product source (default_parity_count, erasure set sizing): - A: single-node 4 drives (EC:2, read quorum 2): hide 1/2/3 drives - B: multi-node 4x1 (one set of 4, EC:2): stop 1/2/3 nodes - C: multi-node 4x4 (one set of 16, EC:4, read quorum 12): 1 node down lands exactly on the read-quorum boundary; 2 nodes down breaks it - C2: multi-node 4x4 with RUSTFS_STORAGE_CLASS_STANDARD=EC:8 (read quorum 8, write quorum 9, lock majority 9): 2 nodes down puts reads inside the reported divergence window (read quorum met while the lock majority is broken) By default a reads-refused-despite-met-read-quorum observation is reported as known-divergence without failing the suite; the strict input escalates it. Chain order becomes: upgrade -> s3 -> kms -> tier -> storage -> heal -> pool -> security -> replication -> fault-tolerance -> performance. Covers the findings of the 2026-09 external degradation report (reads at read quorum, health-endpoint readiness truthfulness, degradedReasons capture) as automated regression probes.