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https://github.com/scylladb/scylladb.git
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369895b80f
After adding a new node to the cluster, Scylla sends a NEW_NODE event to CQL clients. Some clients immediately try to connect to the new node, however it fails as the node has not yet started listening to CQL requests. In contrast, Apache Cassandra waits for the new node to start its CQL server before sending NEW_NODE event. In practice this means that NEW_NODE and UP events will be sent "jointly" after new node is UP. This change is implemented in the same manner as in Apache Cassandra code. Fixes #7301. Closes #7306
317 lines
16 KiB
C++
317 lines
16 KiB
C++
/*
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* Copyright (C) 2015 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "auth/service.hh"
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#include <seastar/core/seastar.hh>
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#include "service/endpoint_lifecycle_subscriber.hh"
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#include "service/migration_listener.hh"
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#include "service/storage_proxy.hh"
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#include "cql3/query_processor.hh"
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#include "cql3/values.hh"
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#include "auth/authenticator.hh"
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#include <seastar/core/distributed.hh>
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#include "timeout_config.hh"
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#include <seastar/core/semaphore.hh>
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#include <memory>
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#include <boost/intrusive/list.hpp>
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#include <seastar/net/tls.hh>
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#include <seastar/core/metrics_registration.hh>
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#include "utils/fragmented_temporary_buffer.hh"
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#include "service_permit.hh"
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#include <seastar/core/sharded.hh>
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#include "utils/updateable_value.hh"
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namespace scollectd {
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class registrations;
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}
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class database;
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struct client_data;
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namespace cql_transport {
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class request_reader;
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class response;
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enum class cql_compression {
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none,
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lz4,
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snappy,
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};
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enum cql_frame_flags {
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compression = 0x01,
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tracing = 0x02,
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warning = 0x08,
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};
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struct [[gnu::packed]] cql_binary_frame_v1 {
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uint8_t version;
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uint8_t flags;
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uint8_t stream;
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uint8_t opcode;
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net::packed<uint32_t> length;
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template <typename Adjuster>
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void adjust_endianness(Adjuster a) {
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return a(length);
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}
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};
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struct [[gnu::packed]] cql_binary_frame_v3 {
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uint8_t version;
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uint8_t flags;
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net::packed<uint16_t> stream;
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uint8_t opcode;
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net::packed<uint32_t> length;
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template <typename Adjuster>
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void adjust_endianness(Adjuster a) {
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return a(stream, length);
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}
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};
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struct cql_query_state {
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service::query_state query_state;
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std::unique_ptr<cql3::query_options> options;
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cql_query_state(service::client_state& client_state, tracing::trace_state_ptr trace_state_ptr, service_permit permit)
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: query_state(client_state, std::move(trace_state_ptr), std::move(permit))
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{ }
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};
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struct cql_server_config {
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::timeout_config timeout_config;
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size_t max_request_size;
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std::function<utils::updateable_value<uint32_t> ()> get_max_concurrent_requests_updateable_value;
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std::function<semaphore& ()> get_service_memory_limiter_semaphore;
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sstring partitioner_name;
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unsigned sharding_ignore_msb;
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std::optional<uint16_t> shard_aware_transport_port;
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std::optional<uint16_t> shard_aware_transport_port_ssl;
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bool allow_shard_aware_drivers = true;
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smp_service_group bounce_request_smp_service_group = default_smp_service_group();
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};
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class cql_server : public seastar::peering_sharded_service<cql_server> {
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private:
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class event_notifier;
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static constexpr cql_protocol_version_type current_version = cql_serialization_format::latest_version;
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std::vector<server_socket> _listeners;
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distributed<cql3::query_processor>& _query_processor;
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cql_server_config _config;
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size_t _max_request_size;
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utils::updateable_value<uint32_t> _max_concurrent_requests;
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semaphore& _memory_available;
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seastar::metrics::metric_groups _metrics;
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std::unique_ptr<event_notifier> _notifier;
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private:
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uint64_t _connects = 0;
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uint64_t _connections = 0;
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uint64_t _requests_served = 0;
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uint32_t _requests_serving = 0;
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uint64_t _requests_blocked_memory = 0;
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uint64_t _requests_shed = 0;
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auth::service& _auth_service;
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public:
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cql_server(distributed<cql3::query_processor>& qp, auth::service&,
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service::migration_notifier& mn,
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cql_server_config config);
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future<> listen(socket_address addr, std::shared_ptr<seastar::tls::credentials_builder> = {}, bool is_shard_aware = false, bool keepalive = false);
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future<> do_accepts(int which, bool keepalive, socket_address server_addr);
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future<> stop();
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public:
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using response = cql_transport::response;
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private:
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class fmt_visitor;
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friend class connection;
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friend std::unique_ptr<cql_server::response> make_result(int16_t stream, messages::result_message& msg,
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const tracing::trace_state_ptr& tr_state, cql_protocol_version_type version, bool skip_metadata);
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class connection : public boost::intrusive::list_base_hook<> {
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cql_server& _server;
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socket_address _server_addr;
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connected_socket _fd;
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input_stream<char> _read_buf;
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output_stream<char> _write_buf;
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fragmented_temporary_buffer::reader _buffer_reader;
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seastar::gate _pending_requests_gate;
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future<> _ready_to_respond = make_ready_future<>();
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cql_protocol_version_type _version = 0;
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cql_compression _compression = cql_compression::none;
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cql_serialization_format _cql_serialization_format = cql_serialization_format::latest();
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service::client_state _client_state;
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std::unordered_map<uint16_t, cql_query_state> _query_states;
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unsigned _request_cpu = 0;
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enum class tracing_request_type : uint8_t {
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not_requested,
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no_write_on_close,
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write_on_close
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};
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private:
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using execution_stage_type = inheriting_concrete_execution_stage<
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future<foreign_ptr<std::unique_ptr<cql_server::response>>>,
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cql_server::connection*,
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fragmented_temporary_buffer::istream,
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uint8_t,
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uint16_t,
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service::client_state&,
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tracing_request_type,
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service_permit>;
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static thread_local execution_stage_type _process_request_stage;
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public:
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connection(cql_server& server, socket_address server_addr, connected_socket&& fd, socket_address addr);
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~connection();
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future<> process();
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future<> process_request();
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future<> shutdown();
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client_data make_client_data() const;
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const service::client_state& get_client_state() const { return _client_state; }
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private:
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const ::timeout_config& timeout_config() const { return _server.timeout_config(); }
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friend class process_request_executor;
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future<foreign_ptr<std::unique_ptr<cql_server::response>>> process_request_one(fragmented_temporary_buffer::istream buf, uint8_t op, uint16_t stream, service::client_state& client_state, tracing_request_type tracing_request, service_permit permit);
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unsigned frame_size() const;
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unsigned pick_request_cpu();
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cql_binary_frame_v3 parse_frame(temporary_buffer<char> buf) const;
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future<fragmented_temporary_buffer> read_and_decompress_frame(size_t length, uint8_t flags);
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future<std::optional<cql_binary_frame_v3>> read_frame();
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future<std::unique_ptr<cql_server::response>> process_startup(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
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future<std::unique_ptr<cql_server::response>> process_auth_response(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
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future<std::unique_ptr<cql_server::response>> process_options(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
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future<foreign_ptr<std::unique_ptr<cql_server::response>>> process_query(uint16_t stream, request_reader in, service::client_state& client_state, service_permit permit, tracing::trace_state_ptr trace_state);
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future<std::unique_ptr<cql_server::response>> process_prepare(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
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future<foreign_ptr<std::unique_ptr<cql_server::response>>> process_execute(uint16_t stream, request_reader in, service::client_state& client_state, service_permit permit, tracing::trace_state_ptr trace_state);
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future<foreign_ptr<std::unique_ptr<cql_server::response>>> process_batch(uint16_t stream, request_reader in, service::client_state& client_state, service_permit permit, tracing::trace_state_ptr trace_state);
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future<std::unique_ptr<cql_server::response>> process_register(uint16_t stream, request_reader in, service::client_state& client_state, tracing::trace_state_ptr trace_state);
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std::unique_ptr<cql_server::response> make_unavailable_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t required, int32_t alive, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_read_timeout_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t received, int32_t blockfor, bool data_present, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_read_failure_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t received, int32_t numfailures, int32_t blockfor, bool data_present, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_mutation_write_timeout_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t received, int32_t blockfor, db::write_type type, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_mutation_write_failure_error(int16_t stream, exceptions::exception_code err, sstring msg, db::consistency_level cl, int32_t received, int32_t numfailures, int32_t blockfor, db::write_type type, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_already_exists_error(int16_t stream, exceptions::exception_code err, sstring msg, sstring ks_name, sstring cf_name, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_unprepared_error(int16_t stream, exceptions::exception_code err, sstring msg, bytes id, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_error(int16_t stream, exceptions::exception_code err, sstring msg, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_ready(int16_t stream, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_supported(int16_t stream, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_topology_change_event(const cql_transport::event::topology_change& event) const;
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std::unique_ptr<cql_server::response> make_status_change_event(const cql_transport::event::status_change& event) const;
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std::unique_ptr<cql_server::response> make_schema_change_event(const cql_transport::event::schema_change& event) const;
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std::unique_ptr<cql_server::response> make_autheticate(int16_t, std::string_view, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_auth_success(int16_t, bytes, const tracing::trace_state_ptr& tr_state) const;
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std::unique_ptr<cql_server::response> make_auth_challenge(int16_t, bytes, const tracing::trace_state_ptr& tr_state) const;
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// Helper functions to encapsulate bounce_to_shard processing for query, execute and batch verbs
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template<typename Process>
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future<foreign_ptr<std::unique_ptr<cql_server::response>>>
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process(uint16_t stream, request_reader in, service::client_state& client_state, service_permit permit, tracing::trace_state_ptr trace_state,
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Process process_fn);
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template<typename Process>
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future<foreign_ptr<std::unique_ptr<cql_server::response>>>
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process_on_shard(unsigned shard, uint16_t stream, fragmented_temporary_buffer::istream is, service::client_state& cs,
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service_permit permit, tracing::trace_state_ptr trace_state, Process process_fn);
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void write_response(foreign_ptr<std::unique_ptr<cql_server::response>>&& response, service_permit permit = empty_service_permit(), cql_compression compression = cql_compression::none);
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void init_cql_serialization_format();
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friend event_notifier;
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};
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friend class type_codec;
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private:
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bool _stopping = false;
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promise<> _all_connections_stopped;
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future<> _stopped = _all_connections_stopped.get_future();
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boost::intrusive::list<connection> _connections_list;
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uint64_t _total_connections = 0;
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uint64_t _current_connections = 0;
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uint64_t _connections_being_accepted = 0;
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private:
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future<> advertise_new_connection(shared_ptr<connection> conn);
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future<> unadvertise_connection(shared_ptr<connection> conn);
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void maybe_idle() {
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if (_stopping && !_connections_being_accepted && !_current_connections) {
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_all_connections_stopped.set_value();
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}
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}
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const ::timeout_config& timeout_config() { return _config.timeout_config; }
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};
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class cql_server::event_notifier : public service::migration_listener,
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public service::endpoint_lifecycle_subscriber
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{
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std::set<cql_server::connection*> _topology_change_listeners;
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std::set<cql_server::connection*> _status_change_listeners;
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std::set<cql_server::connection*> _schema_change_listeners;
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std::unordered_map<gms::inet_address, event::status_change::status_type> _last_status_change;
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service::migration_notifier& _mnotifier;
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bool _stopped = false;
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// We want to delay sending NEW_NODE CQL event to clients until the new node
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// has started listening for CQL requests.
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std::unordered_set<gms::inet_address> _endpoints_pending_joined_notification;
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void send_join_cluster(const gms::inet_address& endpoint);
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public:
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future<> stop();
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event_notifier(service::migration_notifier& mn);
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~event_notifier();
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void register_event(cql_transport::event::event_type et, cql_server::connection* conn);
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void unregister_connection(cql_server::connection* conn);
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virtual void on_create_keyspace(const sstring& ks_name) override;
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virtual void on_create_column_family(const sstring& ks_name, const sstring& cf_name) override;
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virtual void on_create_user_type(const sstring& ks_name, const sstring& type_name) override;
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virtual void on_create_view(const sstring& ks_name, const sstring& view_name) override;
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virtual void on_create_function(const sstring& ks_name, const sstring& function_name) override;
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virtual void on_create_aggregate(const sstring& ks_name, const sstring& aggregate_name) override;
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virtual void on_update_keyspace(const sstring& ks_name) override;
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virtual void on_update_column_family(const sstring& ks_name, const sstring& cf_name, bool columns_changed) override;
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virtual void on_update_user_type(const sstring& ks_name, const sstring& type_name) override;
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virtual void on_update_view(const sstring& ks_name, const sstring& view_name, bool columns_changed) override;
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virtual void on_update_function(const sstring& ks_name, const sstring& function_name) override;
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virtual void on_update_aggregate(const sstring& ks_name, const sstring& aggregate_name) override;
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virtual void on_drop_keyspace(const sstring& ks_name) override;
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virtual void on_drop_column_family(const sstring& ks_name, const sstring& cf_name) override;
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virtual void on_drop_user_type(const sstring& ks_name, const sstring& type_name) override;
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virtual void on_drop_view(const sstring& ks_name, const sstring& view_name) override;
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virtual void on_drop_function(const sstring& ks_name, const sstring& function_name) override;
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virtual void on_drop_aggregate(const sstring& ks_name, const sstring& aggregate_name) override;
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virtual void on_join_cluster(const gms::inet_address& endpoint) override;
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virtual void on_leave_cluster(const gms::inet_address& endpoint) override;
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virtual void on_up(const gms::inet_address& endpoint) override;
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virtual void on_down(const gms::inet_address& endpoint) override;
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};
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}
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