daf9c53bb8
Whether a server can vote in a Raft configuration is not part of the address. `server_address` was used in many context where `can_vote` is irrelevant. Split the struct: `server_address` now contains only `id` and `server_info` as it did before `can_vote` was introduced. Instead we have a `config_member` struct that contains a `server_address` and the `can_vote` field. Also remove an "unsafe" constructor from `server_address` where `id` was provided but `server_info` was not. The constructor was used for tests where `server_info` is irrelevant, but it's important not to forget about the info in production code. The constructor was used for two purposes: - Invoking set operations such as `contains`. To solve this we use C++20 transparent hash and comparator functions, which allow invoking `contains` and similar functions by providing a different key type (in this case `raft::server_id` in set of addresses, for example). - constructing addresses without `info`s in tests. For this we provide helper functions in the test helpers module and use them.
93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
/*
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* Copyright (C) 2021-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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#undef SEASTAR_TESTING_MAIN
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#include "replication.hh"
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seastar::logger tlogger("test");
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seastar::semaphore snapshot_sync(0);
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// application of a snaphot with that id will be delayed until snapshot_sync is signaled
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raft::snapshot_id delay_apply_snapshot{utils::UUID(0, 0xdeadbeaf)};
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// sending of a snaphot with that id will be delayed until snapshot_sync is signaled
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raft::snapshot_id delay_send_snapshot{utils::UUID(0xdeadbeaf, 0)};
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std::vector<raft::server_id> to_raft_id_vec(std::vector<node_id> nodes) noexcept {
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std::vector<raft::server_id> ret;
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for (auto node: nodes) {
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ret.push_back(raft::server_id{to_raft_uuid(node.id)});
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}
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return ret;
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}
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raft::server_address_set address_set(std::vector<node_id> nodes) noexcept {
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return address_set(to_raft_id_vec(nodes));
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}
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raft::config_member_set config_set(std::vector<node_id> nodes) noexcept {
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return config_set(to_raft_id_vec(nodes));
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}
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size_t test_case::get_first_val() {
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// Count existing leader snap index and entries, if present
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size_t first_val = 0;
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if (initial_leader < initial_states.size()) {
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first_val += initial_states[initial_leader].le.size();
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}
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if (initial_leader < initial_snapshots.size()) {
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first_val = initial_snapshots[initial_leader].snap.idx;
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}
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return first_val;
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}
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std::mt19937 random_generator() noexcept {
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auto& gen = seastar::testing::local_random_engine;
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return std::mt19937(gen());
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}
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int rand() noexcept {
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static thread_local std::uniform_int_distribution<int> dist(0, std::numeric_limits<uint8_t>::max());
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static thread_local auto gen = random_generator();
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return dist(gen);
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}
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size_t apply_changes(raft::server_id id, const std::vector<raft::command_cref>& commands,
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lw_shared_ptr<hasher_int> hasher) {
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size_t entries = 0;
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tlogger.debug("sm::apply_changes[{}] got {} entries", id, commands.size());
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for (auto&& d : commands) {
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auto is = ser::as_input_stream(d);
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int n = ser::deserialize(is, boost::type<int>());
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if (n != dummy_command) {
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entries++;
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hasher->update(n); // running hash (values and snapshots)
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tlogger.debug("{}: apply_changes {}", id, n);
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}
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}
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return entries;
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}
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std::vector<raft::log_entry> create_log(std::vector<log_entry> list, unsigned start_idx) {
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std::vector<raft::log_entry> log;
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unsigned i = start_idx;
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for (auto e : list) {
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if (std::holds_alternative<int>(e.data)) {
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log.push_back(raft::log_entry{raft::term_t(e.term), raft::index_t(i++),
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create_command(std::get<int>(e.data))});
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} else {
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log.push_back(raft::log_entry{raft::term_t(e.term), raft::index_t(i++),
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std::get<raft::configuration>(e.data)});
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}
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}
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return log;
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}
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