a8ee4d543a
Add a new variant of the reply to the direct_fd_ping which specifies whether the local group0 is alive or not, and start actively using it. There is no need to introduce a cluster feature. Due to how our serialization framework works, nodes which do not recognize the new variant will treat it as the existing std::monostate. The std::monostate means "the node and group0 is alive"; nodes before the changes in this commit would send a std::monostate anyway, so this is completely transparent for the old nodes.
135 lines
4.1 KiB
C++
135 lines
4.1 KiB
C++
/*
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* Copyright 2020-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#include "raft/raft.hh"
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#include "idl/raft_storage.idl.hh"
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namespace raft {
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struct snapshot_descriptor {
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raft::index_t idx;
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raft::term_t term;
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raft::configuration config;
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raft::snapshot_id id;
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};
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struct vote_request {
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raft::term_t current_term;
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raft::index_t last_log_idx;
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raft::term_t last_log_term;
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bool is_prevote;
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bool force;
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};
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struct vote_reply {
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raft::term_t current_term;
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bool vote_granted;
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bool is_prevote;
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};
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struct install_snapshot {
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raft::term_t current_term;
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raft::snapshot_descriptor snp;
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};
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struct snapshot_reply {
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raft::term_t current_term;
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bool success;
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};
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struct append_reply {
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struct rejected {
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raft::index_t non_matching_idx;
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raft::index_t last_idx;
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};
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struct accepted {
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raft::index_t last_new_idx;
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};
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raft::term_t current_term;
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raft::index_t commit_idx;
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std::variant<raft::append_reply::rejected, raft::append_reply::accepted> result;
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};
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struct append_request {
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raft::term_t current_term;
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raft::index_t prev_log_idx;
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raft::term_t prev_log_term;
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raft::index_t leader_commit_idx;
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std::vector<lw_shared_ptr<const raft::log_entry>> entries;
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};
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struct timeout_now {
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raft::term_t current_term;
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};
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struct read_quorum {
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raft::term_t current_term;
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raft::index_t leader_commit_idx;
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raft::read_id id;
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};
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struct read_quorum_reply {
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raft::term_t current_term;
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raft::index_t commit_idx;
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raft::read_id id;
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};
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struct not_a_leader {
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raft::server_id leader;
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};
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struct not_a_member {
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sstring message();
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};
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struct transient_error {
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sstring message();
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raft::server_id leader;
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};
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struct commit_status_unknown {
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};
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struct entry_id {
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raft::term_t term;
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raft::index_t idx;
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};
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verb [[with_client_info, with_timeout]] raft_send_snapshot (raft::group_id, raft::server_id from_id, raft::server_id dst_id, raft::install_snapshot snap [[ref]]) -> raft::snapshot_reply;
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verb [[with_client_info, with_timeout, one_way]] raft_append_entries (raft::group_id, raft::server_id from_id, raft::server_id dst_id, raft::append_request req [[ref]]);
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verb [[with_client_info, with_timeout, one_way]] raft_append_entries_reply (raft::group_id, raft::server_id from_id, raft::server_id dst_id, raft::append_reply);
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verb [[with_client_info, with_timeout, one_way]] raft_vote_request (raft::group_id, raft::server_id from_id, raft::server_id dst_id, raft::vote_request);
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verb [[with_client_info, with_timeout, one_way]] raft_vote_reply (raft::group_id, raft::server_id from_id, raft::server_id dst_id, raft::vote_reply);
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verb [[with_client_info, with_timeout, one_way]] raft_timeout_now (raft::group_id, raft::server_id from_id, raft::server_id dst_id, raft::timeout_now);
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verb [[with_client_info, with_timeout, one_way]] raft_read_quorum (raft::group_id, raft::server_id from_id, raft::server_id dst_id, raft::read_quorum);
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verb [[with_client_info, with_timeout, one_way]] raft_read_quorum_reply (raft::group_id, raft::server_id from_id, raft::server_id dst_id, raft::read_quorum_reply);
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verb [[with_client_info, with_timeout]] raft_execute_read_barrier_on_leader (raft::group_id, raft::server_id from_id, raft::server_id dst_id) -> raft::read_barrier_reply;
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verb [[with_client_info, with_timeout]] raft_add_entry (raft::group_id, raft::server_id from_id, raft::server_id dst_id, raft::command cmd [[ref]]) -> raft::add_entry_reply;
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verb [[with_client_info, with_timeout]] raft_modify_config (raft::group_id gid, raft::server_id from_id, raft::server_id dst_id, std::vector<raft::config_member> add [[ref]], std::vector<raft::server_id> del [[ref]]) -> raft::add_entry_reply;
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} // namespace raft
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namespace service {
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struct wrong_destination {
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raft::server_id reached_id;
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};
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struct group_liveness_info {
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bool group0_alive;
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};
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struct direct_fd_ping_reply {
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std::variant<std::monostate, service::wrong_destination, service::group_liveness_info> result;
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};
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verb [[with_client_info, cancellable]] direct_fd_ping (raft::server_id dst_id) -> service::direct_fd_ping_reply;
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} // namespace service
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