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construct/matrix/homeserver_bootstrap.cc

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// The Construct
//
// Copyright (C) The Construct Developers, Authors & Contributors
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
namespace ircd::m
{
static void bootstrap_event_vector(homeserver &);
}
void
ircd::m::homeserver::bootstrap()
try
{
assert(opts);
assert(dbs::events);
if(opts->bootstrap_vector_path)
return bootstrap_event_vector(*this);
assert(db::sequence(*dbs::events) == 0);
assert(this->self);
const m::user::id &my_id
{
this->self
};
const m::user me
{
my_id
};
const m::node my_node
{
origin(*this)
};
const m::node::room node_room
{
my_node
};
const m::room::id::buf my_room_id
{
"ircd", origin(*this)
};
const m::room my_room
{
my_room_id
};
const m::room::id::buf conf_room_id
{
"conf", origin(*this)
};
const m::room conf_room
{
conf_room_id
};
const m::room::id::buf tokens_room_id
{
"tokens", origin(*this)
};
const m::room tokens_room
{
tokens_room_id
};
const m::room::id::buf public_room_id
{
"public", origin(*this)
};
const m::room public_room
{
public_room_id
};
const m::room::id::buf alias_room_id
{
"alias", origin(*this)
};
const m::room alias_room
{
alias_room_id
};
const m::room::id::buf control_room_id
{
"control", origin(*this)
};
const m::room control_room
{
control_room_id
};
if(my_id.hostname() == "localhost")
log::warning
{
"The server's name is configured to localhost. This is probably not what you want."
};
assert(key);
assert(!key->verify_keys.empty());
m::keys::cache::set(key->verify_keys);
create(me);
mutable_cast(me).activate();
create(my_room, me);
create(conf_room, me);
create(tokens_room, me);
create(public_room, me);
create(alias_room, me);
create(control_room, me);
send(my_room, me, "m.room.name", "", json::members
{
{ "name", "IRCd's Room" }
});
send(my_room, me, "m.room.topic", "", json::members
{
{ "topic", "The daemon's den." }
});
send(conf_room, me, "m.room.name", "", json::members
{
{ "name", "Server Configuration" }
});
send(tokens_room, me, "m.room.name", "", json::members
{
{ "name", "User Tokens" }
});
send(control_room, me, "m.room.name", "", json::members
{
{ "name", "Control Room" }
});
log::info
{
log, "Bootstrap event generation completed nominally."
};
}
catch(const std::exception &e)
{
log::logf
{
log, log::level::CRITICAL,
"Failed to bootstrap server '%s' on network '%s' :%s",
server_name(*this),
origin(*this),
e.what()
};
throw ircd::panic
{
"bootstrap %s error :%s",
server_name(*this),
e.what()
};
}
void
ircd::m::bootstrap_event_vector(homeserver &homeserver)
try
{
assert(homeserver.opts);
const auto &hs_opts
{
*homeserver.opts
};
const string_view &path
{
hs_opts.bootstrap_vector_path
};
const bool validate_json_only
{
has(string_view(ircd::diagnostic), "valid-json")
};
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const fs::fd::opts file_opts
{
.mode = std::ios::in,
.sequential = true,
};
const fs::fd file
{
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path, file_opts
};
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fs::map::opts map_opts{file_opts};
map_opts.huge2mb = true;
const fs::map map
{
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file, map_opts
};
// This array is backed by the mmap
const json::array events
{
const_buffer{map}
};
char pbuf[4][48];
log::notice
{
log, "Bootstrapping database from events @ `%s' %s",
path,
pretty(pbuf[0], iec(size(map))),
};
auto &current(ctx::cur());
const run::changed handle_quit
{
run::level::QUIT, [&current]
{
ctx::interrupt(current);
}
};
// Options for eval. This eval disables all phases except a select few.
// These may change based on assumptions about the input.
vm::opts vmopts;
vmopts.phase.reset();
// Primary interest is to perform the INDEX and WRITE phase which create
// a database transaction and commit it respectively.
vmopts.phase.set(vm::phase::INDEX, true);
vmopts.phase.set(vm::phase::WRITE, true);
// Perform prefetches over the whole batch;
vmopts.mprefetch_refs = true;
//XXX Consider enable for large batch size.
//vmopts.phase.set(vm::phase::PREINDEX, true);
// Optimize the bootstrap by disabling WAL journaling.
vmopts.wopts.sopts.journal = false;
// Optimize the bootstrap by not updating room heads at every step.
vmopts.wopts.appendix.set(dbs::appendix::ROOM_HEAD, false);
vmopts.wopts.appendix.set(dbs::appendix::ROOM_HEAD_RESOLVE, false);
// Perform normal static-conformity checks; there's no reason to accept
// inputs that wouldn't normally be accepted. While inputs are supposed
// to be trusted and authentic, their correctness should still be checked;
// attempting to recover from a catastrophic failure might be the reason
// for the rebuild.
vmopts.phase.set(vm::phase::CONFORM, true);
//TODO: XXX
// This workaround is required for internal rooms to work, for now.
vmopts.non_conform.set(event::conforms::MISMATCH_ORIGIN_SENDER);
// Indicates the input JSON is canonical (to optimize eval).
//vmopts.json_source = true;
vmopts.non_conform.set(event::conforms::MISMATCH_HASHES);
// Optimize eval if we assume there's only one copy of each event in the
// input array.
vmopts.unique = false;
// Optimize eval if we guarantee there's only one copy of each event
// in the input. This assumption is made when bootstrapping fresh DB.
vmopts.replays = sequence(*dbs::events) == 0;
// Error control
//vmopts.nothrows = -1UL;
// Outputs to infolog for each event; may be noisy;
vmopts.infolog_accept = false;
static const size_t batch_max {64};
std::vector<m::event> vec(batch_max);
size_t count {0}, ebytes[3] {0, 1, 0}, accept {0};
vm::eval eval
{
vmopts
};
util::timer stopwatch;
auto it(begin(events));
while(it != end(events)) try
{
// page in the JSON
size_t i(0);
for(; i < vec.size() && it != end(events); ++i, ++it)
{
// Account for the bytes of the value plus one `,` separator
const string_view &elem(*it);
ebytes[1] += elem.size() + 1;
// In validate mode there's no need to load up the event tuple
if(validate_json_only)
continue;
vec[i] = json::object{elem};
}
const vector_view<const m::event> batch
{
vec.data(), vec.data() + i
};
// process the event batch; make the batch size 0 for validate
if(likely(!validate_json_only))
execute(eval, batch);
count += i;
const size_t incore
{
ebytes[1] > ebytes[0]?
ebytes[1] - ebytes[0]:
0UL
};
// advise dontneed
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if(likely(!validate_json_only))
{
const fs::opts opts
{
.offset = off_t(ebytes[0]),
};
ebytes[0] += evict(map, incore, opts);
}
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if(count % (batch_max * 256) != 0)
continue;
const auto db_bytes
{
db::ticker(*dbs::events, "rocksdb.bytes.written")
};
const auto elapsed
{
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stopwatch.at<milliseconds>().count()
};
log::info
{
log, "Bootstrap %3.2lf%% %s in %s | seq:%zu accept:%zu fault:%zu | %zu event/s; input %s/s; output %s/s",
(ebytes[1] / double(size(string_view(events)))) * 100.0,
pretty(pbuf[0], iec(ebytes[1])),
stopwatch.pretty(pbuf[1]),
vm::sequence::retired,
eval.accepted,
eval.faulted,
size_t(count / double(std::max(elapsed / 1000L, 1000L))),
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pretty(pbuf[2], iec((ebytes[1] / std::max(elapsed, 1L)) * 1000), 1),
pretty(pbuf[3], iec((db_bytes / std::max(elapsed, 1L)) * 1000), 1),
};
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if(likely(!validate_json_only))
ctx::yield();
ctx::interruption_point();
}
catch(const json::parse_error &e)
{
log::critical
{
log, "Bootstrap retired:%zu count:%zu accept:%zu offset:%zu :%s",
vm::sequence::retired,
count,
accept,
std::distance(begin(events).start, it.start),
e.what(),
};
break;
}
// Manual flush of the memtables is required in case the user disabled the
// WAL. If this isn't run several thousand keys in memory will be dropped
// inconsistently between database columns. If WAL is enabled then it
// tidies the DB up just as well.
if(likely(sequence(*dbs::events) > 0))
{
const bool blocking(true), allow_stall(true);
db::sort(*dbs::events, blocking, allow_stall);
}
log::notice
{
log, "Bootstrapped count:%zu retired:%zu in %s from `%s' in %s",
count,
vm::sequence::retired,
pretty(pbuf[0], iec(size(string_view(events)))),
path,
stopwatch.pretty(pbuf[1]),
};
}
catch(const std::exception &e)
{
throw ircd::error
{
"bootstrap %s :terminated without completion :%s",
server_name(homeserver),
e.what(),
};
}
catch(const ctx::terminated &)
{
log::critical
{
log, "bootstrap %s :terminated without completion.",
server_name(homeserver),
};
throw;
}