[Tarantool-patches] [PATCH v2 00/10] dRaft

[Vladislav Shpilevoy]

Raft leader election implementation. This version of the patchset passes the
existing tests, since Raft is disabled by default. New tests were not added yet.

Changes in v2:
- Fixed a bug when bootstrap couldn't finish if the first leader restarted
  before quorum of replicas finished bootstrap too;
- Added box.info.raft;
- A lot of new comments, fixed typos, and squashes between the commits.

Branch: http://github.com/tarantool/tarantool/tree/gh-1146-raft
Issue: https://github.com/tarantool/tarantool/issues/1146

Vladislav Shpilevoy (9):
  applier: store instance_id in struct applier
  box: introduce summary RO flag
  wal: don't touch box.cfg.wal_dir more than once
  replication: track registered replica count
  raft: introduce persistent raft state
  raft: introduce box.cfg.raft_* options
  [tosquash] raft: pass source instance_id to raft_process_msg()
  raft: introduce state machine
  raft: introduce box.info.raft

sergepetrenko (1):
  raft: relay status updates to followers

 src/box/CMakeLists.txt          |   1 +
 src/box/applier.cc              |  66 ++-
 src/box/applier.h               |   2 +
 src/box/box.cc                  | 176 ++++++-
 src/box/box.h                   |   9 +
 src/box/iproto_constants.h      |  15 +
 src/box/lua/cfg.cc              |  27 ++
 src/box/lua/info.c              |  17 +
 src/box/lua/load_cfg.lua        |  15 +
 src/box/lua/misc.cc             |   1 +
 src/box/memtx_engine.c          |  36 ++
 src/box/raft.c                  | 830 ++++++++++++++++++++++++++++++++
 src/box/raft.h                  | 253 ++++++++++
 src/box/relay.cc                |  88 +++-
 src/box/relay.h                 |   7 +
 src/box/replication.cc          |   3 +
 src/box/replication.h           |   7 +
 src/box/wal.c                   |   6 +
 src/box/wal.h                   |   7 +
 src/box/xrow.c                  | 113 +++++
 src/box/xrow.h                  |  15 +
 test/app-tap/init_script.result |   3 +
 test/box/admin.result           |   6 +
 test/box/cfg.result             |  12 +
 test/box/info.result            |   1 +
 25 files changed, 1682 insertions(+), 34 deletions(-)
 create mode 100644 src/box/raft.c
 create mode 100644 src/box/raft.h

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