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scylladb/main.cc
Avi Kivity 576e33149f Merge seastar upstream 
* seastar 0083ee8...85ca12d (1):
  > Merge "Run-time logging configuration" from Jesse

Includes patch from Jesse:

"Switch to Seastar for logging option handling

In addition to updating the abstraction layer for Seastar logging in `log.hh`,
the configuration system (`db/config.{hh,cc}`) has been updated in two ways:

- The string-map type for Boost.program_options is now defined in Seastar.

- A configuration value can be marked as `UsedFromSeastar`. This is like `Used`,
  except the option is expected to be defined in the Boost.Program_options
  description for Seastar. If the option is not defined in Seastar, or it is
  defined with a different type, then a run-time exception is thrown early in
  Scylla's initialization. This is necessary because logging options which are
  now defined in Seastar were previously defined in Scylla and support for these
  options in the YAML file cannot be dropped. In order to be able to verify that
  options marked `UsedFromSeastar` are actually defined in Seastar, the
  interface for adding options to `db::config` has changed from taking a
  `boost::program_options::options_description_easy_init` (which is handle into
  a `boost::program_options::options_description` which only allows adding
  options) to taking a `boost::program_options::options_description`
  directly (which also allows querying existing options).

Scylla also fully defers to Seastar's support for run-time logging
configuration."

Signed-off-by: Jesse Haber-Kucharsky <jhaberku@scylladb.com>
Message-Id: <ef26cffb91bef1ae95d508187a6dd861a6c4fc84.1503344007.git.jhaberku@scylladb.com>
2017-08-27 13:11:33 +03:00

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/*
* Copyright (C) 2014 ScyllaDB
*/
/*
* This file is part of Scylla.
*
* Scylla is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Scylla is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
*/
#include "supervisor.hh"
#include "database.hh"
#include "core/app-template.hh"
#include "core/distributed.hh"
#include "thrift/server.hh"
#include "transport/server.hh"
#include "http/httpd.hh"
#include "api/api_init.hh"
#include "db/config.hh"
#include "db/legacy_schema_migrator.hh"
#include "service/storage_service.hh"
#include "service/migration_manager.hh"
#include "service/load_broadcaster.hh"
#include "streaming/stream_session.hh"
#include "db/system_keyspace.hh"
#include "db/batchlog_manager.hh"
#include "db/commitlog/commitlog.hh"
#include "db/commitlog/commitlog_replayer.hh"
#include "utils/runtime.hh"
#include "utils/file_lock.hh"
#include "log.hh"
#include "debug.hh"
#include "init.hh"
#include "release.hh"
#include "repair/repair.hh"
#include <cstdio>
#include <core/file.hh>
#include <sys/time.h>
#include <sys/resource.h>
#include "disk-error-handler.hh"
#include "tracing/tracing.hh"
#include "core/prometheus.hh"
#include "message/messaging_service.hh"
#include <seastar/net/dns.hh>
#include <seastar/core/memory.hh>
#include <seastar/util/log-cli.hh>
#include "service/cache_hitrate_calculator.hh"
thread_local disk_error_signal_type commit_error;
thread_local disk_error_signal_type general_disk_error;
seastar::metrics::metric_groups app_metrics;
using namespace std::chrono_literals;
namespace bpo = boost::program_options;
static boost::filesystem::path relative_conf_dir(boost::filesystem::path path) {
static auto conf_dir = db::config::get_conf_dir(); // this is not gonna change in our life time
return conf_dir / path;
}
static future<>
read_config(bpo::variables_map& opts, db::config& cfg) {
using namespace boost::filesystem;
sstring file;
cfg.apply_seastar_options(opts);
if (opts.count("options-file") > 0) {
file = opts["options-file"].as<sstring>();
} else {
file = relative_conf_dir("scylla.yaml").string();
}
return check_direct_io_support(file).then([file, &cfg] {
return cfg.read_from_file(file);
}).handle_exception([file](auto ep) {
startlog.error("Could not read configuration file {}: {}", file, ep);
return make_exception_future<>(ep);
});
}
static future<> disk_sanity(sstring path, bool developer_mode) {
return check_direct_io_support(path).then([] {
return make_ready_future<>();
}).handle_exception([path](auto ep) {
startlog.error("Could not access {}: {}", path, ep);
return make_exception_future<>(ep);
});
};
class directories {
public:
future<> touch_and_lock(sstring path) {
return io_check(recursive_touch_directory, path).then_wrapped([this, path] (future<> f) {
try {
f.get();
return utils::file_lock::acquire(path + "/.lock").then([this](utils::file_lock lock) {
_locks.emplace_back(std::move(lock));
}).handle_exception([path](auto ep) {
// only do this because "normal" unhandled exception exit in seastar
// _drops_ system_error message ("what()") and thus does not quite deliver
// the relevant info to the user
try {
std::rethrow_exception(ep);
} catch (std::exception& e) {
startlog.error("Could not initialize {}: {}", path, e.what());
throw;
} catch (...) {
throw;
}
});
} catch (...) {
startlog.error("Directory '{}' cannot be initialized. Tried to do it but failed with: {}", path, std::current_exception());
throw;
}
});
}
template<typename _Iter>
future<> touch_and_lock(_Iter i, _Iter e) {
return parallel_for_each(i, e, [this](sstring path) {
return touch_and_lock(std::move(path));
});
}
template<typename _Range>
future<> touch_and_lock(_Range&& r) {
return touch_and_lock(std::begin(r), std::end(r));
}
private:
std::vector<utils::file_lock>
_locks;
};
static
void
verify_rlimit(bool developer_mode) {
struct rlimit lim;
int r = getrlimit(RLIMIT_NOFILE, &lim);
if (r == -1) {
throw std::system_error(errno, std::system_category());
}
auto recommended = 200'000U;
auto min = 10'000U;
if (lim.rlim_cur < min) {
if (developer_mode) {
startlog.warn("NOFILE rlimit too low (recommended setting {}, minimum setting {};"
" you may run out of file descriptors.", recommended, min);
} else {
startlog.error("NOFILE rlimit too low (recommended setting {}, minimum setting {};"
" refusing to start.", recommended, min);
throw std::runtime_error("NOFILE rlimit too low");
}
}
}
static bool cpu_sanity() {
if (!__builtin_cpu_supports("sse4.2")) {
std::cerr << "Scylla requires a processor with SSE 4.2 support\n";
return false;
}
return true;
}
static void tcp_syncookies_sanity() {
try {
auto f = file_desc::open("/proc/sys/net/ipv4/tcp_syncookies", O_RDONLY | O_CLOEXEC);
char buf[128] = {};
f.read(buf, 128);
if (sstring(buf) == "0\n") {
startlog.warn("sysctl entry net.ipv4.tcp_syncookies is set to 0.\n"
"For better performance, set following parameter on sysctl is strongly recommended:\n"
"net.ipv4.tcp_syncookies=1");
}
} catch (const std::system_error& e) {
startlog.warn("Unable to check if net.ipv4.tcp_syncookies is set {}", e);
}
}
static future<>
verify_seastar_io_scheduler(bool has_max_io_requests, bool developer_mode) {
auto note_bad_conf = [developer_mode] (sstring cause) {
sstring msg = "I/O Scheduler is not properly configured! This is a non-supported setup, and performance is expected to be unpredictably bad.\n Reason found: "
+ cause + "\n"
+ "To properly configure the I/O Scheduler, run the scylla_io_setup utility shipped with Scylla.\n";
sstring devmode_msg = msg + "To ignore this, see the developer_mode configuration option.";
if (developer_mode) {
startlog.warn(msg.c_str());
} else {
startlog.error(devmode_msg.c_str());
throw std::runtime_error("Bad I/O Scheduler configuration");
}
};
if (!has_max_io_requests) {
note_bad_conf("--max-io-requests is not set.");
}
return smp::invoke_on_all([developer_mode, note_bad_conf] {
auto capacity = engine().get_io_queue().capacity();
if (capacity < 4) {
auto cause = sprint("I/O Queue capacity for this shard is too low (%ld, minimum 4 expected).", capacity);
note_bad_conf(cause);
}
});
}
static
void
verify_adequate_memory_per_shard(bool developer_mode) {
auto shard_mem = memory::stats().total_memory();
if (shard_mem >= (1 << 30)) {
return;
}
if (developer_mode) {
startlog.warn("Only {} MiB per shard; this is below the recommended minimum of 1 GiB/shard;"
" continuing since running in developer mode", shard_mem >> 20);
} else {
startlog.error("Only {} MiB per shard; this is below the recommended minimum of 1 GiB/shard; terminating."
"Configure more memory (--memory option) or decrease shard count (--smp option).", shard_mem >> 20);
throw std::runtime_error("configuration (memory per shard too low)");
}
}
class memory_threshold_guard {
seastar::memory::scoped_large_allocation_warning_threshold _slawt;
public:
explicit memory_threshold_guard(size_t threshold) : _slawt(threshold) {}
future<> stop() { return make_ready_future<>(); }
};
int main(int ac, char** av) {
int return_value = 0;
try {
// early check to avoid triggering
if (!cpu_sanity()) {
_exit(71);
}
runtime::init_uptime();
std::setvbuf(stdout, nullptr, _IOLBF, 1000);
app_template::config app_cfg;
app_cfg.name = "Scylla";
app_cfg.default_task_quota = 500us;
app_template app(std::move(app_cfg));
auto cfg = make_lw_shared<db::config>();
bool help_version = false;
cfg->add_options(app.get_options_description())
// TODO : default, always read?
("options-file", bpo::value<sstring>(), "configuration file (i.e. <SCYLLA_HOME>/conf/scylla.yaml)")
("version", bpo::bool_switch(&help_version), "print version number and exit")
;
distributed<database> db;
seastar::sharded<service::cache_hitrate_calculator> cf_cache_hitrate_calculator;
debug::db = &db;
auto& qp = cql3::get_query_processor();
auto& proxy = service::get_storage_proxy();
auto& mm = service::get_migration_manager();
api::http_context ctx(db, proxy);
httpd::http_server_control prometheus_server;
prometheus::config pctx;
directories dirs;
return app.run_deprecated(ac, av, [&] {
if (help_version) {
print("%s\n", scylla_version());
engine().exit(0);
return make_ready_future<>();
}
print("Scylla version %s starting ...\n", scylla_version());
auto&& opts = app.configuration();
namespace sm = seastar::metrics;
app_metrics.add_group("scylladb", {
sm::make_gauge("current_version", sm::description("Current ScyllaDB version."), { sm::label_instance("version", scylla_version()), sm::shard_label("") }, [] { return 0; })
});
// Check developer mode before even reading the config file, because we may not be
// able to read it if we need to disable strict dma mode.
// We'll redo this later and apply it to all reactors.
if (opts.count("developer-mode")) {
engine().set_strict_dma(false);
}
tcp_syncookies_sanity();
return seastar::async([cfg, &db, &qp, &proxy, &mm, &ctx, &opts, &dirs, &pctx, &prometheus_server, &return_value, &cf_cache_hitrate_calculator] {
read_config(opts, *cfg).get();
{
std::unordered_map<sstring, logging::log_level> logger_levels;
log_cli::parse_logger_levels(cfg->logger_log_level(), std::inserter(logger_levels, logger_levels.end()));
logging::apply_settings(logging::settings{
std::move(logger_levels),
log_cli::parse_log_level(cfg->default_log_level()),
cfg->log_to_stdout(),
cfg->log_to_syslog()});
}
verify_rlimit(cfg->developer_mode());
verify_adequate_memory_per_shard(cfg->developer_mode());
if (cfg->partitioner() != "org.apache.cassandra.dht.Murmur3Partitioner") {
if (cfg->enable_deprecated_partitioners()) {
startlog.warn("The partitioner {} is deprecated and will be removed in a future version."
" Contact scylladb-users@googlegroups.com if you are using it in production", cfg->partitioner());
} else {
startlog.error("The partitioner {} is deprecated and will be removed in a future version."
" To enable it, add \"enable_deprecated_partitioners: true\" to scylla.yaml"
" Contact scylladb-users@googlegroups.com if you are using it in production", cfg->partitioner());
throw bad_configuration_error();
}
}
dht::set_global_partitioner(cfg->partitioner(), cfg->murmur3_partitioner_ignore_msb_bits());
auto start_thrift = cfg->start_rpc();
uint16_t api_port = cfg->api_port();
ctx.api_dir = cfg->api_ui_dir();
ctx.api_doc = cfg->api_doc_dir();
sstring listen_address = cfg->listen_address();
sstring rpc_address = cfg->rpc_address();
sstring api_address = cfg->api_address() != "" ? cfg->api_address() : rpc_address;
sstring broadcast_address = cfg->broadcast_address();
sstring broadcast_rpc_address = cfg->broadcast_rpc_address();
auto prom_addr = seastar::net::dns::get_host_by_name(cfg->prometheus_address()).get0();
supervisor::notify("starting prometheus API server");
uint16_t pport = cfg->prometheus_port();
if (pport) {
pctx.metric_help = "Scylla server statistics";
pctx.prefix = cfg->prometheus_prefix();
prometheus_server.start("prometheus").get();
prometheus::start(prometheus_server, pctx);
prometheus_server.listen(ipv4_addr{prom_addr.addr_list.front(), pport}).handle_exception([pport, &cfg] (auto ep) {
startlog.error("Could not start Prometheus API server on {}:{}: {}", cfg->prometheus_address(), pport, ep);
return make_exception_future<>(ep);
}).get();
}
if (!broadcast_address.empty()) {
try {
utils::fb_utilities::set_broadcast_address(gms::inet_address::lookup(broadcast_address).get0());
} catch (...) {
startlog.error("Bad configuration: invalid 'broadcast_address': {}: {}", broadcast_address, std::current_exception());
throw bad_configuration_error();
}
} else if (!listen_address.empty()) {
try {
utils::fb_utilities::set_broadcast_address(gms::inet_address::lookup(listen_address).get0());
} catch (...) {
startlog.error("Bad configuration: invalid 'listen_address': {}: {}", listen_address, std::current_exception());
throw bad_configuration_error();
}
} else {
startlog.error("Bad configuration: neither listen_address nor broadcast_address are defined\n");
throw bad_configuration_error();
}
if (!broadcast_rpc_address.empty()) {
utils::fb_utilities::set_broadcast_rpc_address(gms::inet_address::lookup(broadcast_rpc_address).get0());
} else {
if (rpc_address == "0.0.0.0") {
startlog.error("If rpc_address is set to a wildcard address {}, then you must set broadcast_rpc_address to a value other than {}", rpc_address, rpc_address);
throw bad_configuration_error();
}
utils::fb_utilities::set_broadcast_rpc_address(gms::inet_address::lookup(rpc_address).get0());
}
// TODO: lib.
auto is_true = [](sstring val) {
std::transform(val.begin(), val.end(), val.begin(), ::tolower);
return val == "true" || val == "1";
};
// The start_native_transport method is invoked by API as well, and uses the config object
// (through db) directly. Lets fixup default valued right here instead then, so it in turn can be
// kept simple
// TODO: make intrinsic part of config defaults instead
auto& ceo = cfg->client_encryption_options();
if (is_true(get_or_default(ceo, "enabled", "false"))) {
ceo["enabled"] = "true";
ceo["certificate"] = get_or_default(ceo, "certificate", relative_conf_dir("scylla.crt").string());
ceo["keyfile"] = get_or_default(ceo, "keyfile", relative_conf_dir("scylla.key").string());
ceo["require_client_auth"] = is_true(get_or_default(ceo, "require_client_auth", "false")) ? "true" : "false";
} else {
ceo["enabled"] = "false";
}
using namespace locator;
// Re-apply strict-dma after we've read the config file, this time
// to all reactors
if (opts.count("developer-mode")) {
smp::invoke_on_all([] { engine().set_strict_dma(false); }).get();
}
supervisor::notify("creating tracing");
tracing::tracing::create_tracing("trace_keyspace_helper").get();
supervisor::notify("creating snitch");
i_endpoint_snitch::create_snitch(cfg->endpoint_snitch()).get();
// #293 - do not stop anything
// engine().at_exit([] { return i_endpoint_snitch::stop_snitch(); });
supervisor::notify("determining DNS name");
auto e = seastar::net::dns::get_host_by_name(api_address).get0();
supervisor::notify("starting API server");
auto ip = e.addr_list.front();
ctx.http_server.start("API").get();
api::set_server_init(ctx).get();
ctx.http_server.listen(ipv4_addr{ip, api_port}).get();
startlog.info("Scylla API server listening on {}:{} ...", api_address, api_port);
supervisor::notify("initializing storage service");
init_storage_service(db);
supervisor::notify("starting per-shard database core");
// Note: changed from using a move here, because we want the config object intact.
db.start(std::ref(*cfg)).get();
engine().at_exit([&db, &return_value] {
// A shared sstable must be compacted by all shards before it can be deleted.
// Since we're stoping, that's not going to happen. Cancel those pending
// deletions to let anyone waiting on them to continue.
sstables::cancel_atomic_deletions();
// #293 - do not stop anything - not even db (for real)
//return db.stop();
// call stop on each db instance, but leave the shareded<database> pointers alive.
return db.invoke_on_all([](auto& db) {
return db.stop();
}).then([] {
return sstables::await_background_jobs_on_all_shards();
}).then([&return_value] {
::_exit(return_value);
});
});
verify_seastar_io_scheduler(opts.count("max-io-requests"), db.local().get_config().developer_mode()).get();
supervisor::notify("creating data directories");
dirs.touch_and_lock(db.local().get_config().data_file_directories()).get();
supervisor::notify("creating commitlog directory");
dirs.touch_and_lock(db.local().get_config().commitlog_directory()).get();
supervisor::notify("verifying data and commitlog directories");
std::unordered_set<sstring> directories;
directories.insert(db.local().get_config().data_file_directories().cbegin(),
db.local().get_config().data_file_directories().cend());
directories.insert(db.local().get_config().commitlog_directory());
parallel_for_each(directories, [&db] (sstring pathname) {
return disk_sanity(pathname, db.local().get_config().developer_mode());
}).get();
// Initialization of a keyspace is done by shard 0 only. For system
// keyspace, the procedure will go through the hardcoded column
// families, and in each of them, it will load the sstables for all
// shards using distributed database object.
// Iteration through column family directory for sstable loading is
// done only by shard 0, so we'll no longer face race conditions as
// described here: https://github.com/scylladb/scylla/issues/1014
distributed_loader::init_system_keyspace(db).get();
supervisor::notify("starting gossip");
// Moved local parameters here, esp since with the
// ssl stuff it gets to be a lot.
uint16_t storage_port = cfg->storage_port();
uint16_t ssl_storage_port = cfg->ssl_storage_port();
double phi = cfg->phi_convict_threshold();
auto seed_provider= cfg->seed_provider();
sstring cluster_name = cfg->cluster_name();
const auto& ssl_opts = cfg->server_encryption_options();
auto tcp_nodelay_inter_dc = cfg->inter_dc_tcp_nodelay();
auto encrypt_what = get_or_default(ssl_opts, "internode_encryption", "none");
auto trust_store = get_or_default(ssl_opts, "truststore");
auto cert = get_or_default(ssl_opts, "certificate", relative_conf_dir("scylla.crt").string());
auto key = get_or_default(ssl_opts, "keyfile", relative_conf_dir("scylla.key").string());
auto prio = get_or_default(ssl_opts, "priority_string", sstring());
auto clauth = is_true(get_or_default(ssl_opts, "require_client_auth", "false"));
if (cluster_name.empty()) {
cluster_name = "ScyllaDB Cluster";
startlog.warn("Using default cluster name is not recommended. Using a unique cluster name will reduce the chance of adding nodes to the wrong cluster by mistake");
}
init_ms_fd_gossiper(listen_address
, storage_port
, ssl_storage_port
, tcp_nodelay_inter_dc
, encrypt_what
, trust_store
, cert
, key
, prio
, clauth
, cfg->internode_compression()
, seed_provider
, cluster_name
, phi
, cfg->listen_on_broadcast_address());
supervisor::notify("starting messaging service");
supervisor::notify("starting storage proxy");
proxy.start(std::ref(db)).get();
// #293 - do not stop anything
// engine().at_exit([&proxy] { return proxy.stop(); });
supervisor::notify("starting migration manager");
mm.start().get();
// #293 - do not stop anything
// engine().at_exit([&mm] { return mm.stop(); });
supervisor::notify("starting query processor");
qp.start(std::ref(proxy), std::ref(db)).get();
// #293 - do not stop anything
// engine().at_exit([&qp] { return qp.stop(); });
supervisor::notify("initializing batchlog manager");
db::get_batchlog_manager().start(std::ref(qp)).get();
// #293 - do not stop anything
// engine().at_exit([] { return db::get_batchlog_manager().stop(); });
sstables::init_metrics().get();
db::system_keyspace::minimal_setup(db, qp);
// schema migration, if needed, is also done on shard 0
db::legacy_schema_migrator::migrate(proxy, qp.local()).get();
supervisor::notify("loading sstables");
distributed_loader::ensure_system_table_directories(db).get();
supervisor::notify("loading sstables");
distributed_loader::init_non_system_keyspaces(db, proxy).get();
// register connection drop notification to update cf's cache hit rate data
db.invoke_on_all([] (database& db) {
db.register_connection_drop_notifier(netw::get_local_messaging_service());
}).get();
supervisor::notify("setting up system keyspace");
db::system_keyspace::setup(db, qp).get();
supervisor::notify("starting commit log");
auto cl = db.local().commitlog();
if (cl != nullptr) {
auto paths = cl->get_segments_to_replay();
if (!paths.empty()) {
supervisor::notify("replaying commit log");
auto rp = db::commitlog_replayer::create_replayer(qp).get0();
rp.recover(paths).get();
supervisor::notify("replaying commit log - flushing memtables");
db.invoke_on_all([] (database& db) {
return db.flush_all_memtables();
}).get();
supervisor::notify("replaying commit log - removing old commitlog segments");
for (auto& path : paths) {
::unlink(path.c_str());
}
}
}
// If the same sstable is shared by several shards, it cannot be
// deleted until all shards decide to compact it. So we want to
// start thse compactions now. Note we start compacting only after
// all sstables in this CF were loaded on all shards - otherwise
// we will have races between the compaction and loading processes
// We also want to trigger regular compaction on boot.
for (auto& x : db.local().get_column_families()) {
column_family& cf = *(x.second);
distributed_loader::reshard(db, cf.schema()->ks_name(), cf.schema()->cf_name());
}
db.invoke_on_all([&proxy] (database& db) {
for (auto& x : db.get_column_families()) {
column_family& cf = *(x.second);
cf.trigger_compaction();
}
}).get();
api::set_server_storage_service(ctx).get();
api::set_server_gossip(ctx).get();
api::set_server_snitch(ctx).get();
api::set_server_storage_proxy(ctx).get();
api::set_server_load_sstable(ctx).get();
static seastar::sharded<memory_threshold_guard> mtg;
mtg.start(cfg->large_memory_allocation_warning_threshold());
supervisor::notify("initializing migration manager RPC verbs");
service::get_migration_manager().invoke_on_all([] (auto& mm) {
mm.init_messaging_service();
}).get();
supervisor::notify("initializing storage proxy RPC verbs");
proxy.invoke_on_all([] (service::storage_proxy& p) {
p.init_messaging_service();
}).get();
supervisor::notify("starting streaming service");
streaming::stream_session::init_streaming_service(db).get();
api::set_server_stream_manager(ctx).get();
// Start handling REPAIR_CHECKSUM_RANGE messages
netw::get_messaging_service().invoke_on_all([&db] (auto& ms) {
ms.register_repair_checksum_range([&db] (sstring keyspace, sstring cf, dht::token_range range, rpc::optional<repair_checksum> hash_version) {
auto hv = hash_version ? *hash_version : repair_checksum::legacy;
return do_with(std::move(keyspace), std::move(cf), std::move(range),
[&db, hv] (auto& keyspace, auto& cf, auto& range) {
return checksum_range(db, keyspace, cf, range, hv);
});
});
}).get();
supervisor::notify("starting storage service", true);
auto& ss = service::get_local_storage_service();
ss.init_server().get();
api::set_server_messaging_service(ctx).get();
api::set_server_storage_service(ctx).get();
supervisor::notify("starting batchlog manager");
db::get_batchlog_manager().invoke_on_all([] (db::batchlog_manager& b) {
return b.start();
}).get();
supervisor::notify("starting load broadcaster");
// should be unique_ptr, but then lambda passed to at_exit will be non copieable and
// casting to std::function<> will fail to compile
auto lb = make_shared<service::load_broadcaster>(db, gms::get_local_gossiper());
lb->start_broadcasting();
service::get_local_storage_service().set_load_broadcaster(lb);
engine().at_exit([lb = std::move(lb)] () mutable { return lb->stop_broadcasting(); });
supervisor::notify("starting cf cache hit rate calculator");
cf_cache_hitrate_calculator.start(std::ref(db), std::ref(cf_cache_hitrate_calculator)).get();
engine().at_exit([&cf_cache_hitrate_calculator] { return cf_cache_hitrate_calculator.stop(); });
cf_cache_hitrate_calculator.local().run_on(engine().cpu_id());
gms::get_local_gossiper().wait_for_gossip_to_settle().get();
api::set_server_gossip_settle(ctx).get();
supervisor::notify("starting native transport");
service::get_local_storage_service().start_native_transport().get();
if (start_thrift) {
service::get_local_storage_service().start_rpc_server().get();
}
if (cfg->defragment_memory_on_idle()) {
smp::invoke_on_all([] () {
engine().set_idle_cpu_handler([] (reactor::work_waiting_on_reactor check_for_work) {
return logalloc::shard_tracker().compact_on_idle(check_for_work);
});
}).get();
}
smp::invoke_on_all([&cfg] () {
return logalloc::shard_tracker().set_reclamation_step(cfg->lsa_reclamation_step());
}).get();
if (cfg->abort_on_lsa_bad_alloc()) {
smp::invoke_on_all([&cfg]() {
return logalloc::shard_tracker().enable_abort_on_bad_alloc();
}).get();
}
api::set_server_done(ctx).get();
supervisor::notify("serving");
// Register at_exit last, so that storage_service::drain_on_shutdown will be called first
engine().at_exit([] {
return repair_shutdown(service::get_local_storage_service().db());
});
engine().at_exit([] {
return service::get_local_storage_service().drain_on_shutdown();
});
engine().at_exit([&db] {
return db.invoke_on_all([](auto& db) {
return db.get_compaction_manager().stop();
});
});
}).then_wrapped([&return_value] (auto && f) {
try {
f.get();
} catch (...) {
return_value = 1;
engine_exit(std::current_exception());
}
});
});
} catch (...) {
// reactor may not have been initialized, so can't use logger
fprint(std::cerr, "FATAL: Exception during startup, aborting: %s\n", std::current_exception());
return 7; // 1 has a special meaning for upstart
}
}
namespace debug {
seastar::sharded<database>* db;
}
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