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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab ft=cpp
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2020 Red Hat, Inc.
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <fmt/format.h>
#include "common/errno.h"
#include "rgw_sync_checkpoint.h"
#include "rgw_sal_rados.h"
#include "rgw_bucket_sync.h"
#include "rgw_data_sync.h"
#include "rgw_http_errors.h"
#include "cls/rgw/cls_rgw_client.h"
#include "services/svc_sys_obj.h"
#include "services/svc_zone.h"
#include "rgw_zone.h"
#define dout_subsys ceph_subsys_rgw
namespace {
std::string incremental_marker(const rgw_bucket_shard_sync_info& info)
{
if (info.state != rgw_bucket_shard_sync_info::StateIncrementalSync) {
return "";
}
return BucketIndexShardsManager::get_shard_marker(info.inc_marker.position);
}
bool operator<(const std::vector<rgw_bucket_shard_sync_info>& lhs,
const BucketIndexShardsManager& rhs)
{
for (size_t i = 0; i < lhs.size(); ++i) {
const auto& l = incremental_marker(lhs[i]);
const auto& r = rhs.get(i, "");
if (l < r) {
return true;
}
}
return false;
}
bool empty(const BucketIndexShardsManager& markers, int size)
{
for (int i = 0; i < size; ++i) {
const auto& m = markers.get(i, "");
if (!m.empty()) {
return false;
}
}
return true;
}
std::ostream& operator<<(std::ostream& out, const std::vector<rgw_bucket_shard_sync_info>& rhs)
{
const char* separator = ""; // first entry has no comma
out << '[';
for (auto& i : rhs) {
out << std::exchange(separator, ", ") << incremental_marker(i);
}
return out << ']';
}
std::ostream& operator<<(std::ostream& out, const BucketIndexShardsManager& rhs)
{
out << '[';
const char* separator = ""; // first entry has no comma
for (auto& [i, marker] : rhs.get()) {
out << std::exchange(separator, ", ") << marker;
}
return out << ']';
}
int bucket_source_sync_checkpoint(const DoutPrefixProvider* dpp,
rgw::sal::RGWRadosStore *store,
const RGWBucketInfo& bucket_info,
const RGWBucketInfo& source_bucket_info,
const rgw_sync_bucket_pipe& pipe,
const BucketIndexShardsManager& remote_markers,
ceph::timespan retry_delay,
ceph::coarse_mono_time timeout_at)
{
const auto num_shards = source_bucket_info.layout.current_index.layout.normal.num_shards;
if (empty(remote_markers, num_shards)) {
ldpp_dout(dpp, 1) << "bucket sync caught up with empty source" << dendl;
return 0;
}
std::vector<rgw_bucket_shard_sync_info> status;
status.resize(std::max<size_t>(1, num_shards));
int r = rgw_bucket_sync_status(dpp, store, pipe, bucket_info,
&source_bucket_info, &status);
if (r < 0) {
return r;
}
while (status < remote_markers) {
auto delay_until = ceph::coarse_mono_clock::now() + retry_delay;
if (delay_until > timeout_at) {
ldpp_dout(dpp, 0) << "bucket checkpoint timed out waiting for incremental sync to catch up" << dendl;
return -ETIMEDOUT;
}
ldpp_dout(dpp, 1) << "waiting for incremental sync to catch up:\n"
<< " local status: " << status << '\n'
<< " remote markers: " << remote_markers << dendl;
std::this_thread::sleep_until(delay_until);
r = rgw_bucket_sync_status(dpp, store, pipe, bucket_info, &source_bucket_info, &status);
if (r < 0) {
return r;
}
}
ldpp_dout(dpp, 1) << "bucket sync caught up with source:\n"
<< " local status: " << status << '\n'
<< " remote markers: " << remote_markers << dendl;
return 0;
}
int source_bilog_markers(const DoutPrefixProvider *dpp,
RGWSI_Zone* zone_svc,
const rgw_sync_bucket_pipe& pipe,
BucketIndexShardsManager& remote_markers,
optional_yield y)
{
ceph_assert(pipe.source.zone);
auto& zone_conn_map = zone_svc->get_zone_conn_map();
auto conn = zone_conn_map.find(pipe.source.zone->id);
if (conn == zone_conn_map.end()) {
return -EINVAL;
}
return rgw_read_remote_bilog_info(dpp, conn->second, *pipe.source.bucket,
remote_markers, y);
}
} // anonymous namespace
int rgw_bucket_sync_checkpoint(const DoutPrefixProvider* dpp,
rgw::sal::RGWRadosStore *store,
const RGWBucketSyncPolicyHandler& policy,
const RGWBucketInfo& info,
std::optional<rgw_zone_id> opt_source_zone,
std::optional<rgw_bucket> opt_source_bucket,
ceph::timespan retry_delay,
ceph::coarse_mono_time timeout_at)
{
struct sync_source_entry {
rgw_sync_bucket_pipe pipe;
BucketIndexShardsManager remote_markers;
RGWBucketInfo source_bucket_info;
};
std::list<sync_source_entry> sources;
// fetch remote markers and bucket info in parallel
boost::asio::io_context ioctx;
for (const auto& [source_zone_id, pipe] : policy.get_all_sources()) {
// filter by source zone/bucket
if (opt_source_zone && *opt_source_zone != *pipe.source.zone) {
continue;
}
if (opt_source_bucket && !opt_source_bucket->match(*pipe.source.bucket)) {
continue;
}
auto& entry = sources.emplace_back();
entry.pipe = pipe;
// fetch remote markers
spawn::spawn(ioctx, [&] (yield_context yield) {
auto y = optional_yield{ioctx, yield};
int r = source_bilog_markers(dpp, store->svc()->zone, entry.pipe,
entry.remote_markers, y);
if (r < 0) {
ldpp_dout(dpp, 0) << "failed to fetch remote bilog markers: "
<< cpp_strerror(r) << dendl;
throw std::system_error(-r, std::system_category());
}
});
// fetch source bucket info
spawn::spawn(ioctx, [&] (yield_context yield) {
auto y = optional_yield{ioctx, yield};
auto obj_ctx = store->svc()->sysobj->init_obj_ctx();
int r = store->getRados()->get_bucket_instance_info(
obj_ctx, *entry.pipe.source.bucket, entry.source_bucket_info,
nullptr, nullptr, y, dpp);
if (r < 0) {
ldpp_dout(dpp, 0) << "failed to read source bucket info: "
<< cpp_strerror(r) << dendl;
throw std::system_error(-r, std::system_category());
}
});
}
try {
ioctx.run();
} catch (const std::system_error& e) {
return -e.code().value();
}
// checkpoint each source sequentially
for (const auto& [pipe, remote_markers, source_bucket_info] : sources) {
int r = bucket_source_sync_checkpoint(dpp, store, info, source_bucket_info,
pipe, remote_markers,
retry_delay, timeout_at);
if (r < 0) {
ldpp_dout(dpp, 0) << "bucket sync checkpoint failed: " << cpp_strerror(r) << dendl;
return r;
}
}
ldpp_dout(dpp, 0) << "bucket checkpoint complete" << dendl;
return 0;
}
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