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foundationdb/fdbclient/BackupContainer.actor.cpp

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/*
* BackupContainer.actor.cpp
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cstdlib>
#include <ostream>
// FIXME: Trim this down
#include "flow/Platform.actor.h"
#include "fdbclient/AsyncTaskThread.h"
#include "fdbclient/BackupContainer.h"
#include "fdbclient/BackupAgent.actor.h"
#include "fdbclient/FDBTypes.h"
#include "fdbclient/JsonBuilder.h"
#include "flow/Arena.h"
#include "flow/Trace.h"
#include "flow/UnitTest.h"
#include "flow/Hash3.h"
#include "fdbrpc/AsyncFileReadAhead.actor.h"
#include "fdbrpc/simulator.h"
#include "flow/Platform.h"
#include "fdbclient/AsyncFileS3BlobStore.actor.h"
#include "fdbclient/BackupContainerAzureBlobStore.h"
#include "fdbclient/BackupContainerFileSystem.h"
#include "fdbclient/BackupContainerLocalDirectory.h"
#include "fdbclient/BackupContainerS3BlobStore.h"
#include "fdbclient/Status.h"
#include "fdbclient/SystemData.h"
#include "fdbclient/ReadYourWrites.h"
#include "fdbclient/KeyBackedTypes.h"
#include "fdbclient/RunTransaction.actor.h"
#include <algorithm>
#include <cinttypes>
#include <time.h>
#include "flow/actorcompiler.h" // has to be last include
namespace IBackupFile_impl {
ACTOR Future<Void> appendStringRefWithLen(Reference<IBackupFile> file, Standalone<StringRef> s) {
state uint32_t lenBuf = bigEndian32((uint32_t)s.size());
wait(file->append(&lenBuf, sizeof(lenBuf)));
wait(file->append(s.begin(), s.size()));
return Void();
}
} // namespace IBackupFile_impl
Future<Void> IBackupFile::appendStringRefWithLen(Standalone<StringRef> s) {
return IBackupFile_impl::appendStringRefWithLen(Reference<IBackupFile>::addRef(this), s);
}
std::string IBackupContainer::ExpireProgress::toString() const {
std::string s = step + "...";
if(total > 0) {
s += format("%d/%d (%.2f%%)", done, total, double(done) / total * 100);
}
return s;
}
void BackupFileList::toStream(FILE *fout) const {
for(const RangeFile &f : ranges) {
fprintf(fout, "range %" PRId64 " %s\n", f.fileSize, f.fileName.c_str());
}
for(const LogFile &f : logs) {
fprintf(fout, "log %" PRId64 " %s\n", f.fileSize, f.fileName.c_str());
}
for(const KeyspaceSnapshotFile &f : snapshots) {
fprintf(fout, "snapshotManifest %" PRId64 " %s\n", f.totalSize, f.fileName.c_str());
}
}
Future<Void> fetchTimes(Reference<ReadYourWritesTransaction> tr, std::map<Version, int64_t> *pVersionTimeMap) {
std::vector<Future<Void>> futures;
// Resolve each version in the map,
for(auto &p : *pVersionTimeMap) {
futures.push_back(map(timeKeeperEpochsFromVersion(p.first, tr), [=](Optional<int64_t> t) {
if(t.present())
pVersionTimeMap->at(p.first) = t.get();
else
pVersionTimeMap->erase(p.first);
return Void();
}));
}
return waitForAll(futures);
}
Future<Void> BackupDescription::resolveVersionTimes(Database cx) {
// Populate map with versions needed
versionTimeMap.clear();
for(const KeyspaceSnapshotFile &m : snapshots) {
versionTimeMap[m.beginVersion];
versionTimeMap[m.endVersion];
}
if(minLogBegin.present())
versionTimeMap[minLogBegin.get()];
if(maxLogEnd.present())
versionTimeMap[maxLogEnd.get()];
if(contiguousLogEnd.present())
versionTimeMap[contiguousLogEnd.get()];
if(minRestorableVersion.present())
versionTimeMap[minRestorableVersion.get()];
if(maxRestorableVersion.present())
versionTimeMap[maxRestorableVersion.get()];
return runRYWTransaction(cx, [=](Reference<ReadYourWritesTransaction> tr) { return fetchTimes(tr, &versionTimeMap); });
};
std::string BackupDescription::toString() const {
std::string info;
info.append(format("URL: %s\n", url.c_str()));
info.append(format("Restorable: %s\n", maxRestorableVersion.present() ? "true" : "false"));
info.append(format("Partitioned logs: %s\n", partitioned ? "true" : "false"));
auto formatVersion = [&](Version v) {
std::string s;
if(!versionTimeMap.empty()) {
auto i = versionTimeMap.find(v);
if(i != versionTimeMap.end())
s = format("%lld (%s)", v, BackupAgentBase::formatTime(i->second).c_str());
else
s = format("%lld (unknown)", v);
}
else if(maxLogEnd.present()) {
double days = double(maxLogEnd.get() - v) / (CLIENT_KNOBS->CORE_VERSIONSPERSECOND * 24 * 60 * 60);
s = format("%lld (maxLogEnd %s%.2f days)", v, days < 0 ? "+" : "-", days);
}
else {
s = format("%lld", v);
}
return s;
};
for(const KeyspaceSnapshotFile &m : snapshots) {
info.append(format("Snapshot: startVersion=%s endVersion=%s totalBytes=%lld restorable=%s expiredPct=%.2f\n",
formatVersion(m.beginVersion).c_str(), formatVersion(m.endVersion).c_str(), m.totalSize, m.restorable.orDefault(false) ? "true" : "false", m.expiredPct(expiredEndVersion)));
}
info.append(format("SnapshotBytes: %lld\n", snapshotBytes));
if(expiredEndVersion.present())
info.append(format("ExpiredEndVersion: %s\n", formatVersion(expiredEndVersion.get()).c_str()));
if(unreliableEndVersion.present())
info.append(format("UnreliableEndVersion: %s\n", formatVersion(unreliableEndVersion.get()).c_str()));
if(minLogBegin.present())
info.append(format("MinLogBeginVersion: %s\n", formatVersion(minLogBegin.get()).c_str()));
if(contiguousLogEnd.present())
info.append(format("ContiguousLogEndVersion: %s\n", formatVersion(contiguousLogEnd.get()).c_str()));
if(maxLogEnd.present())
info.append(format("MaxLogEndVersion: %s\n", formatVersion(maxLogEnd.get()).c_str()));
if(minRestorableVersion.present())
info.append(format("MinRestorableVersion: %s\n", formatVersion(minRestorableVersion.get()).c_str()));
if(maxRestorableVersion.present())
info.append(format("MaxRestorableVersion: %s\n", formatVersion(maxRestorableVersion.get()).c_str()));
if(!extendedDetail.empty())
info.append("ExtendedDetail: ").append(extendedDetail);
return info;
}
std::string BackupDescription::toJSON() const {
JsonBuilderObject doc;
doc.setKey("SchemaVersion", "1.0.0");
doc.setKey("URL", url.c_str());
doc.setKey("Restorable", maxRestorableVersion.present());
doc.setKey("Partitioned", partitioned);
auto formatVersion = [&](Version v) {
JsonBuilderObject doc;
doc.setKey("Version", v);
if(!versionTimeMap.empty()) {
auto i = versionTimeMap.find(v);
if(i != versionTimeMap.end()) {
doc.setKey("Timestamp", BackupAgentBase::formatTime(i->second));
doc.setKey("EpochSeconds", i->second);
}
}
else if(maxLogEnd.present()) {
double days = double(v - maxLogEnd.get()) / (CLIENT_KNOBS->CORE_VERSIONSPERSECOND * 24 * 60 * 60);
doc.setKey("RelativeDays", days);
}
return doc;
};
JsonBuilderArray snapshotsArray;
for(const KeyspaceSnapshotFile &m : snapshots) {
JsonBuilderObject snapshotDoc;
snapshotDoc.setKey("Start", formatVersion(m.beginVersion));
snapshotDoc.setKey("End", formatVersion(m.endVersion));
snapshotDoc.setKey("Restorable", m.restorable.orDefault(false));
snapshotDoc.setKey("TotalBytes", m.totalSize);
snapshotDoc.setKey("PercentageExpired", m.expiredPct(expiredEndVersion));
snapshotsArray.push_back(snapshotDoc);
}
doc.setKey("Snapshots", snapshotsArray);
doc.setKey("TotalSnapshotBytes", snapshotBytes);
if(expiredEndVersion.present())
doc.setKey("ExpiredEnd", formatVersion(expiredEndVersion.get()));
if(unreliableEndVersion.present())
doc.setKey("UnreliableEnd", formatVersion(unreliableEndVersion.get()));
if(minLogBegin.present())
doc.setKey("MinLogBegin", formatVersion(minLogBegin.get()));
if(contiguousLogEnd.present())
doc.setKey("ContiguousLogEnd", formatVersion(contiguousLogEnd.get()));
if(maxLogEnd.present())
doc.setKey("MaxLogEnd", formatVersion(maxLogEnd.get()));
if(minRestorableVersion.present())
doc.setKey("MinRestorablePoint", formatVersion(minRestorableVersion.get()));
if(maxRestorableVersion.present())
doc.setKey("MaxRestorablePoint", formatVersion(maxRestorableVersion.get()));
if(!extendedDetail.empty())
doc.setKey("ExtendedDetail", extendedDetail);
return doc.getJson();
}
std::string IBackupContainer::lastOpenError;
std::vector<std::string> IBackupContainer::getURLFormats() {
return {
#ifdef BUILD_AZURE_BACKUP
BackupContainerAzureBlobStore::getURLFormat(),
#endif
BackupContainerLocalDirectory::getURLFormat(),
BackupContainerS3BlobStore::getURLFormat(),
};
}
// Get an IBackupContainer based on a container URL string
Reference<IBackupContainer> IBackupContainer::openContainer(const std::string& url) {
static std::map<std::string, Reference<IBackupContainer>> m_cache;
Reference<IBackupContainer>& r = m_cache[url];
if (r) return r;
try {
StringRef u(url);
if (u.startsWith(LiteralStringRef("file://"))) {
r = Reference<IBackupContainer>(new BackupContainerLocalDirectory(url));
} else if (u.startsWith(LiteralStringRef("blobstore://"))) {
std::string resource;
// The URL parameters contain blobstore endpoint tunables as well as possible backup-specific options.
S3BlobStoreEndpoint::ParametersT backupParams;
Reference<S3BlobStoreEndpoint> bstore =
S3BlobStoreEndpoint::fromString(url, &resource, &lastOpenError, &backupParams);
if (resource.empty()) throw backup_invalid_url();
for (auto c : resource)
if (!isalnum(c) && c != '_' && c != '-' && c != '.' && c != '/') throw backup_invalid_url();
r = Reference<IBackupContainer>(new BackupContainerS3BlobStore(bstore, resource, backupParams));
}
#ifdef BUILD_AZURE_BACKUP
else if (u.startsWith(LiteralStringRef("azure://"))) {
u.eat(LiteralStringRef("azure://"));
auto address = NetworkAddress::parse(u.eat(LiteralStringRef("/")).toString());
auto containerName = u.eat(LiteralStringRef("/")).toString();
auto accountName = u.eat(LiteralStringRef("/")).toString();
r = Reference<IBackupContainer>(new BackupContainerAzureBlobStore(address, containerName, accountName));
}
#endif
else {
lastOpenError = "invalid URL prefix";
throw backup_invalid_url();
}
r->URL = url;
return r;
} catch (Error& e) {
if (e.code() == error_code_actor_cancelled) throw;
TraceEvent m(SevWarn, "BackupContainer");
m.detail("Description", "Invalid container specification. See help.");
m.detail("URL", url);
m.error(e);
if (e.code() == error_code_backup_invalid_url) m.detail("LastOpenError", lastOpenError);
throw;
}
}
// Get a list of URLS to backup containers based on some a shorter URL. This function knows about some set of supported
// URL types which support this sort of backup discovery.
ACTOR Future<std::vector<std::string>> listContainers_impl(std::string baseURL) {
try {
StringRef u(baseURL);
if (u.startsWith(LiteralStringRef("file://"))) {
std::vector<std::string> results = wait(BackupContainerLocalDirectory::listURLs(baseURL));
return results;
} else if (u.startsWith(LiteralStringRef("blobstore://"))) {
std::string resource;
S3BlobStoreEndpoint::ParametersT backupParams;
Reference<S3BlobStoreEndpoint> bstore =
S3BlobStoreEndpoint::fromString(baseURL, &resource, &IBackupContainer::lastOpenError, &backupParams);
if (!resource.empty()) {
TraceEvent(SevWarn, "BackupContainer")
.detail("Description", "Invalid backup container base URL, resource aka path should be blank.")
.detail("URL", baseURL);
throw backup_invalid_url();
}
// Create a dummy container to parse the backup-specific parameters from the URL and get a final bucket name
BackupContainerS3BlobStore dummy(bstore, "dummy", backupParams);
std::vector<std::string> results = wait(BackupContainerS3BlobStore::listURLs(bstore, dummy.getBucket()));
return results;
}
// TODO: Enable this when Azure backups are ready
/*
else if (u.startsWith(LiteralStringRef("azure://"))) {
std::vector<std::string> results = wait(BackupContainerAzureBlobStore::listURLs(baseURL));
return results;
}
*/
else {
IBackupContainer::lastOpenError = "invalid URL prefix";
throw backup_invalid_url();
}
} catch (Error& e) {
if (e.code() == error_code_actor_cancelled) throw;
TraceEvent m(SevWarn, "BackupContainer");
m.detail("Description", "Invalid backup container URL prefix. See help.");
m.detail("URL", baseURL);
m.error(e);
if (e.code() == error_code_backup_invalid_url) m.detail("LastOpenError", IBackupContainer::lastOpenError);
throw;
}
}
Future<std::vector<std::string>> IBackupContainer::listContainers(const std::string& baseURL) {
return listContainers_impl(baseURL);
}
ACTOR Future<Version> timeKeeperVersionFromDatetime(std::string datetime, Database db) {
state KeyBackedMap<int64_t, Version> versionMap(timeKeeperPrefixRange.begin);
state Reference<ReadYourWritesTransaction> tr =
Reference<ReadYourWritesTransaction>(new ReadYourWritesTransaction(db));
state int64_t time = BackupAgentBase::parseTime(datetime);
if (time < 0) {
fprintf(stderr, "ERROR: Incorrect date/time or format. Format is %s.\n",
BackupAgentBase::timeFormat().c_str());
throw backup_error();
}
loop {
try {
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
state std::vector<std::pair<int64_t, Version>> results =
wait(versionMap.getRange(tr, 0, time, 1, false, true));
if (results.size() != 1) {
// No key less than time was found in the database
// Look for a key >= time.
wait(store(results, versionMap.getRange(tr, time, std::numeric_limits<int64_t>::max(), 1)));
if (results.size() != 1) {
fprintf(stderr, "ERROR: Unable to calculate a version for given date/time.\n");
throw backup_error();
}
}
// Adjust version found by the delta between time and the time found and min with 0.
auto& result = results[0];
return std::max<Version>(0, result.second + (time - result.first) * CLIENT_KNOBS->CORE_VERSIONSPERSECOND);
} catch (Error& e) {
wait(tr->onError(e));
}
}
}
ACTOR Future<Optional<int64_t>> timeKeeperEpochsFromVersion(Version v, Reference<ReadYourWritesTransaction> tr) {
state KeyBackedMap<int64_t, Version> versionMap(timeKeeperPrefixRange.begin);
// Binary search to find the closest date with a version <= v
state int64_t min = 0;
state int64_t max = (int64_t)now();
state int64_t mid;
state std::pair<int64_t, Version> found;
tr->setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr->setOption(FDBTransactionOptions::LOCK_AWARE);
loop {
mid = (min + max + 1) / 2; // ceiling
// Find the highest time < mid
state std::vector<std::pair<int64_t, Version>> results =
wait(versionMap.getRange(tr, min, mid, 1, false, true));
if (results.size() != 1) {
if (mid == min) {
// There aren't any records having a version < v, so just look for any record having a time < now
// and base a result on it
wait(store(results, versionMap.getRange(tr, 0, (int64_t)now(), 1)));
if (results.size() != 1) {
// There aren't any timekeeper records to base a result on so return nothing
return Optional<int64_t>();
}
found = results[0];
break;
}
min = mid;
continue;
}
found = results[0];
if (v < found.second) {
max = found.first;
} else {
if (found.first == min) {
break;
}
min = found.first;
}
}
return found.first + (v - found.second) / CLIENT_KNOBS->CORE_VERSIONSPERSECOND;
}
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