diff options
Diffstat (limited to 'src/crimson/mon/MonClient.cc')
| -rw-r--r-- | src/crimson/mon/MonClient.cc | 606 |
1 files changed, 606 insertions, 0 deletions
diff --git a/src/crimson/mon/MonClient.cc b/src/crimson/mon/MonClient.cc new file mode 100644 index 00000000..4b61270c --- /dev/null +++ b/src/crimson/mon/MonClient.cc @@ -0,0 +1,606 @@ +#include "MonClient.h" + +#include <random> + +#include <seastar/core/future-util.hh> +#include <seastar/core/lowres_clock.hh> +#include <seastar/util/log.hh> + +#include "auth/AuthClientHandler.h" +#include "auth/AuthMethodList.h" +#include "auth/RotatingKeyRing.h" + +#include "common/hostname.h" + +#include "crimson/auth/KeyRing.h" +#include "crimson/common/config_proxy.h" +#include "crimson/common/log.h" +#include "crimson/net/Connection.h" +#include "crimson/net/Errors.h" +#include "crimson/net/Messenger.h" + +#include "messages/MAuth.h" +#include "messages/MAuthReply.h" +#include "messages/MConfig.h" +#include "messages/MLogAck.h" +#include "messages/MMonCommand.h" +#include "messages/MMonCommandAck.h" +#include "messages/MMonGetVersion.h" +#include "messages/MMonGetVersionReply.h" +#include "messages/MMonMap.h" +#include "messages/MMonSubscribe.h" +#include "messages/MMonSubscribeAck.h" + +namespace { + seastar::logger& logger() + { + return ceph::get_logger(ceph_subsys_monc); + } + + template<typename Message, typename... Args> + Ref<Message> make_message(Args&&... args) + { + return {new Message{std::forward<Args>(args)...}, false}; + } +} + +namespace ceph::mon { + + +class Connection { +public: + Connection(ceph::net::ConnectionRef conn, + KeyRing* keyring); + seastar::future<> handle_auth_reply(Ref<MAuthReply> m); + seastar::future<> authenticate(epoch_t epoch, + const EntityName& name, + const AuthMethodList& auth_methods, + uint32_t want_keys); + seastar::future<> close(); + bool is_my_peer(const entity_addr_t& addr) const; + + seastar::future<> renew_tickets(); + ceph::net::ConnectionRef get_conn(); + +private: + seastar::future<> setup_session(epoch_t epoch, + const AuthMethodList& auth_methods, + const EntityName& name); + std::unique_ptr<AuthClientHandler> create_auth(Ref<MAuthReply> m, + const EntityName& name, + uint32_t want_keys); + seastar::future<bool> do_auth(); + +private: + bool closed = false; + seastar::promise<Ref<MAuthReply>> reply; + ceph::net::ConnectionRef conn; + std::unique_ptr<AuthClientHandler> auth; + RotatingKeyRing rotating_keyring; + uint64_t global_id; +}; + +Connection::Connection(ceph::net::ConnectionRef conn, + KeyRing* keyring) + : conn{conn}, + rotating_keyring{nullptr, CEPH_ENTITY_TYPE_OSD, keyring} +{} + +seastar::future<> Connection::handle_auth_reply(Ref<MAuthReply> m) +{ + reply.set_value(m); + return seastar::now(); +} + +seastar::future<> Connection::renew_tickets() +{ + if (auth->need_tickets()) { + return do_auth().then([](bool success) { + if (!success) { + throw std::system_error(make_error_code( + ceph::net::error::negotiation_failure)); + } + }); + } + return seastar::now(); +} + +std::unique_ptr<AuthClientHandler> +Connection::create_auth(Ref<MAuthReply> m, + const EntityName& name, + uint32_t want_keys) +{ + static CephContext cct; + std::unique_ptr<AuthClientHandler> auth; + auth.reset(AuthClientHandler::create(&cct, + m->protocol, + &rotating_keyring)); + if (!auth) { + logger().error("no handler for protocol {}", m->protocol); + throw std::system_error(make_error_code( + ceph::net::error::negotiation_failure)); + } + auth->init(name); + auth->set_want_keys(want_keys); + auth->set_global_id(global_id); + + if (m->global_id != global_id) { + // it's a new session + auth->set_global_id(global_id); + auth->reset(); + } + return auth; +} + +seastar::future<> +Connection::setup_session(epoch_t epoch, + const AuthMethodList& auth_methods, + const EntityName& name) +{ + auto m = make_message<MAuth>(); + m->protocol = 0; + m->monmap_epoch = epoch; + __u8 struct_v = 1; + encode(struct_v, m->auth_payload); + encode(auth_methods.get_supported_set(), m->auth_payload); + encode(name, m->auth_payload); + encode(global_id, m->auth_payload); + return conn->send(m); +} + +seastar::future<bool> Connection::do_auth() +{ + auto m = make_message<MAuth>(); + m->protocol = auth->get_protocol(); + auth->prepare_build_request(); + if (int ret = auth->build_request(m->auth_payload); ret) { + logger().error("missing/bad key for '{}'", + ceph::common::local_conf()->name); + throw std::system_error(make_error_code( + ceph::net::error::negotiation_failure)); + } + logger().info("sending {}", *m); + return conn->send(m).then([this] { + logger().info("waiting"); + return reply.get_future(); + }).then([this] (Ref<MAuthReply> m) { + logger().info("mon {} => {} returns {}: {}", + conn->get_messenger()->get_myaddr(), + conn->get_peer_addr(), *m, m->result); + reply = decltype(reply){}; + auto p = m->result_bl.cbegin(); + auto ret = auth->handle_response(m->result, p, +#warning fix crimson: session_key, connection_secret + nullptr, nullptr); + if (ret != 0 && ret != -EAGAIN) { + throw std::system_error(make_error_code( + ceph::net::error::negotiation_failure)); + } + return seastar::make_ready_future<bool>(ret == 0); + }); +} + +seastar::future<> +Connection::authenticate(epoch_t epoch, + const EntityName& name, + const AuthMethodList& auth_methods, + uint32_t want_keys) +{ + return conn->keepalive().then([epoch, auth_methods, name, this] { + return setup_session(epoch, auth_methods, name); + }).then([this] { + return reply.get_future(); + }).then([name, want_keys, this](Ref<MAuthReply> m) { + reply = decltype(reply){}; + auth = create_auth(m, name, want_keys); + global_id = m->global_id; + switch (auto p = m->result_bl.cbegin(); + auth->handle_response(m->result, p, +#warning fix crimson: session_key, connection_secret + nullptr, nullptr)) { + case 0: + // none + return seastar::now(); + case -EAGAIN: + // cephx + return seastar::repeat([this] { + return do_auth().then([](bool success) { + return seastar::make_ready_future<seastar::stop_iteration>( + success ? + seastar::stop_iteration::yes: + seastar::stop_iteration::no); + }); + }); + default: + ceph_assert_always(0); + } + }); +} + +seastar::future<> Connection::close() +{ + if (conn && !std::exchange(closed, true)) { + return conn->close(); + } else { + return seastar::now(); + } +} + +bool Connection::is_my_peer(const entity_addr_t& addr) const +{ + return conn->get_peer_addr() == addr; +} + +ceph::net::ConnectionRef Connection::get_conn() { + return conn; +} + +namespace { +auto create_auth_methods(uint32_t entity_type) +{ + auto& conf = ceph::common::local_conf(); + std::string method; + const auto auth_supported = conf.get_val<std::string>("auth_supported"); + if (!auth_supported.empty()) { + method = auth_supported; + } else if (entity_type & (CEPH_ENTITY_TYPE_OSD | + CEPH_ENTITY_TYPE_MDS | + CEPH_ENTITY_TYPE_MON | + CEPH_ENTITY_TYPE_MGR)) { + method = conf.get_val<std::string>("auth_cluster_required"); + } else { + method = conf.get_val<std::string>("auth_client_required"); + } + return std::make_unique<AuthMethodList>(nullptr, method); +} +} + +Client::Client(ceph::net::Messenger& messenger) + // currently, crimson is OSD-only + : want_keys{CEPH_ENTITY_TYPE_MON | + CEPH_ENTITY_TYPE_OSD | + CEPH_ENTITY_TYPE_MGR}, + timer{[this] { tick(); }}, + msgr{messenger} +{} + +Client::Client(Client&&) = default; +Client::~Client() = default; + +seastar::future<> Client::start() { + entity_name = ceph::common::local_conf()->name; + // should always be OSD, though + auth_methods = create_auth_methods(entity_name.get_type()); + return load_keyring().then([this] { + return monmap.build_initial(ceph::common::local_conf(), false); + }).then([this] { + return authenticate(); + }); +} + +seastar::future<> Client::load_keyring() +{ + if (!auth_methods->is_supported_auth(CEPH_AUTH_CEPHX)) { + return seastar::now(); + } else { + return ceph::auth::load_from_keyring(&keyring).then([](KeyRing* keyring) { + return ceph::auth::load_from_keyfile(keyring); + }).then([](KeyRing* keyring) { + return ceph::auth::load_from_key(keyring); + }).then([](KeyRing*) { + return seastar::now(); + }); + } +} + +void Client::tick() +{ + seastar::with_gate(tick_gate, [this] { + return active_con->renew_tickets(); + }); +} + +bool Client::is_hunting() const { + return !active_con; +} + +seastar::future<> +Client::ms_dispatch(ceph::net::ConnectionRef conn, MessageRef m) +{ + logger().info("ms_dispatch {}", *m); + // we only care about these message types + switch (m->get_type()) { + case CEPH_MSG_MON_MAP: + return handle_monmap(conn, boost::static_pointer_cast<MMonMap>(m)); + case CEPH_MSG_AUTH_REPLY: + return handle_auth_reply( + conn, boost::static_pointer_cast<MAuthReply>(m)); + case CEPH_MSG_MON_SUBSCRIBE_ACK: + return handle_subscribe_ack( + boost::static_pointer_cast<MMonSubscribeAck>(m)); + case CEPH_MSG_MON_GET_VERSION_REPLY: + return handle_get_version_reply( + boost::static_pointer_cast<MMonGetVersionReply>(m)); + case MSG_MON_COMMAND_ACK: + return handle_mon_command_ack( + boost::static_pointer_cast<MMonCommandAck>(m)); + case MSG_LOGACK: + return handle_log_ack( + boost::static_pointer_cast<MLogAck>(m)); + case MSG_CONFIG: + return handle_config( + boost::static_pointer_cast<MConfig>(m)); + default: + return seastar::now(); + } +} + +seastar::future<> Client::ms_handle_reset(ceph::net::ConnectionRef conn) +{ + auto found = std::find_if(pending_conns.begin(), pending_conns.end(), + [peer_addr = conn->get_peer_addr()](auto& mc) { + return mc.is_my_peer(peer_addr); + }); + if (found != pending_conns.end()) { + logger().warn("pending conn reset by {}", conn->get_peer_addr()); + return found->close(); + } else if (active_con && active_con->is_my_peer(conn->get_peer_addr())) { + logger().warn("active conn reset {}", conn->get_peer_addr()); + active_con.reset(); + return reopen_session(-1); + } else { + logger().error("unknown reset from {}", conn->get_peer_addr()); + return seastar::now(); + } +} + +seastar::future<> Client::handle_monmap(ceph::net::ConnectionRef conn, + Ref<MMonMap> m) +{ + monmap.decode(m->monmapbl); + const auto peer_addr = conn->get_peer_addr(); + auto cur_mon = monmap.get_name(peer_addr); + logger().info("got monmap {}, mon.{}, is now rank {}", + monmap.epoch, cur_mon, monmap.get_rank(cur_mon)); + sub.got("monmap", monmap.get_epoch()); + + if (monmap.get_addr_name(peer_addr, cur_mon)) { + return seastar::now(); + } else { + logger().warn("mon.{} went away", cur_mon); + return reopen_session(-1); + } +} + +seastar::future<> Client::handle_auth_reply(ceph::net::ConnectionRef conn, + Ref<MAuthReply> m) +{ + logger().info("mon {} => {} returns {}: {}", + conn->get_messenger()->get_myaddr(), + conn->get_peer_addr(), *m, m->result); + auto found = std::find_if(pending_conns.begin(), pending_conns.end(), + [peer_addr = conn->get_peer_addr()](auto& mc) { + return mc.is_my_peer(peer_addr); + }); + if (found != pending_conns.end()) { + return found->handle_auth_reply(m); + } else if (active_con) { + return active_con->handle_auth_reply(m); + } else { + logger().error("unknown auth reply from {}", conn->get_peer_addr()); + return seastar::now(); + } +} + +seastar::future<> Client::handle_subscribe_ack(Ref<MMonSubscribeAck> m) +{ + sub.acked(m->interval); + return seastar::now(); +} + +Client::get_version_t Client::get_version(const std::string& map) +{ + auto m = make_message<MMonGetVersion>(); + auto tid = ++last_version_req_id; + m->handle = tid; + m->what = map; + auto& req = version_reqs[tid]; + return active_con->get_conn()->send(m).then([&req] { + return req.get_future(); + }); +} + +seastar::future<> +Client::handle_get_version_reply(Ref<MMonGetVersionReply> m) +{ + if (auto found = version_reqs.find(m->handle); + found != version_reqs.end()) { + auto& result = found->second; + logger().trace("{}: {} returns {}", + __func__, m->handle, m->version); + result.set_value(m->version, m->oldest_version); + version_reqs.erase(found); + } else { + logger().warn("{}: version request with handle {} not found", + __func__, m->handle); + } + return seastar::now(); +} + +seastar::future<> Client::handle_mon_command_ack(Ref<MMonCommandAck> m) +{ + const auto tid = m->get_tid(); + if (auto found = mon_commands.find(tid); + found != mon_commands.end()) { + auto& result = found->second; + logger().trace("{} {}", __func__, tid); + result.set_value(m->r, m->rs, std::move(m->get_data())); + mon_commands.erase(found); + } else { + logger().warn("{} {} not found", __func__, tid); + } + return seastar::now(); +} + +seastar::future<> Client::handle_log_ack(Ref<MLogAck> m) +{ + // XXX + return seastar::now(); +} + +seastar::future<> Client::handle_config(Ref<MConfig> m) +{ + return ceph::common::local_conf().set_mon_vals(m->config); +} + +std::vector<unsigned> Client::get_random_mons(unsigned n) const +{ + uint16_t min_priority = std::numeric_limits<uint16_t>::max(); + for (const auto& m : monmap.mon_info) { + if (m.second.priority < min_priority) { + min_priority = m.second.priority; + } + } + vector<unsigned> ranks; + for (auto [name, info] : monmap.mon_info) { + // TODO: #msgr-v2 + if (info.public_addrs.legacy_addr().is_blank_ip()) { + continue; + } + if (info.priority == min_priority) { + ranks.push_back(monmap.get_rank(name)); + } + } + std::random_device rd; + std::default_random_engine rng{rd()}; + std::shuffle(ranks.begin(), ranks.end(), rng); + if (n == 0 || n > ranks.size()) { + return ranks; + } else { + return {ranks.begin(), ranks.begin() + n}; + } +} + +seastar::future<> Client::authenticate() +{ + return reopen_session(-1); +} + +seastar::future<> Client::stop() +{ + return tick_gate.close().then([this] { + if (active_con) { + return active_con->close(); + } else { + return seastar::now(); + } + }); +} + +seastar::future<> Client::reopen_session(int rank) +{ + vector<unsigned> mons; + if (rank >= 0) { + mons.push_back(rank); + } else { + const auto parallel = + ceph::common::local_conf().get_val<uint64_t>("mon_client_hunt_parallel"); + mons = get_random_mons(parallel); + } + pending_conns.reserve(mons.size()); + return seastar::parallel_for_each(mons, [this](auto rank) { +#warning fixme + auto peer = monmap.get_addrs(rank).legacy_addr(); + logger().info("connecting to mon.{}", rank); + return msgr.connect(peer, CEPH_ENTITY_TYPE_MON) + .then([this] (auto xconn) { + // sharded-messenger compatible mode assumes all connections running + // in one shard. + ceph_assert((*xconn)->shard_id() == seastar::engine().cpu_id()); + ceph::net::ConnectionRef conn = xconn->release(); + auto& mc = pending_conns.emplace_back(conn, &keyring); + return mc.authenticate( + monmap.get_epoch(), entity_name, + *auth_methods, want_keys).handle_exception([conn](auto ep) { + return conn->close().then([ep = std::move(ep)] { + std::rethrow_exception(ep); + }); + }); + }).then([peer, this] { + if (!is_hunting()) { + return seastar::now(); + } + auto found = std::find_if(pending_conns.begin(), pending_conns.end(), + [peer](auto& mc) { + return mc.is_my_peer(peer); + }); + ceph_assert_always(found != pending_conns.end()); + active_con.reset(new Connection{std::move(*found)}); + return seastar::parallel_for_each(pending_conns, [] (auto& conn) { + return conn.close(); + }); + }); + }).then([this] { + pending_conns.clear(); + }); +} + +Client::command_result_t +Client::run_command(const std::vector<std::string>& cmd, + const bufferlist& bl) +{ + auto m = make_message<MMonCommand>(monmap.fsid); + auto tid = ++last_mon_command_id; + m->set_tid(tid); + m->cmd = cmd; + m->set_data(bl); + auto& req = mon_commands[tid]; + return active_con->get_conn()->send(m).then([&req] { + return req.get_future(); + }); +} + +seastar::future<> Client::send_message(MessageRef m) +{ + return active_con->get_conn()->send(m); +} + +bool Client::sub_want(const std::string& what, version_t start, unsigned flags) +{ + return sub.want(what, start, flags); +} + +void Client::sub_got(const std::string& what, version_t have) +{ + sub.got(what, have); +} + +void Client::sub_unwant(const std::string& what) +{ + sub.unwant(what); +} + +bool Client::sub_want_increment(const std::string& what, + version_t start, + unsigned flags) +{ + return sub.inc_want(what, start, flags); +} + +seastar::future<> Client::renew_subs() +{ + if (!sub.have_new()) { + logger().warn("{} - empty", __func__); + return seastar::now(); + } + logger().trace("{}", __func__); + + auto m = make_message<MMonSubscribe>(); + m->what = sub.get_subs(); + m->hostname = ceph_get_short_hostname(); + return active_con->get_conn()->send(m).then([this] { + sub.renewed(); + }); +} + +} // namespace ceph::mon |