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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "idealstatemanager.h"
#include "statecheckers.h"
#include "top_level_distributor.h"
#include "idealstatemetricsset.h"
#include "distributor_bucket_space_repo.h"
#include "distributor_bucket_space.h"
#include <vespa/vespalib/stllike/asciistream.h>
#include <vespa/storageapi/message/persistence.h>
#include <vespa/document/bucket/fixed_bucket_spaces.h>
#include <vespa/vespalib/util/assert.h>
#include <vespa/log/log.h>
LOG_SETUP(".distributor.idealstatemanager");
using document::BucketSpace;
using storage::lib::Node;
using storage::lib::NodeType;
namespace storage::distributor {
IdealStateManager::IdealStateManager(const DistributorNodeContext& node_ctx,
DistributorStripeOperationContext& op_ctx,
IdealStateMetricSet& metrics)
: _metrics(metrics),
_stateCheckers(),
_splitBucketStateChecker(nullptr),
_node_ctx(node_ctx),
_op_ctx(op_ctx),
_has_logged_phantom_replica_warning(false)
{
_stateCheckers.emplace_back(std::make_shared<BucketStateStateChecker>());
_stateCheckers.emplace_back(std::make_shared<SplitBucketStateChecker>());
_splitBucketStateChecker = dynamic_cast<SplitBucketStateChecker *>(_stateCheckers.back().get());
_stateCheckers.emplace_back(std::make_shared<SplitInconsistentStateChecker>());
_stateCheckers.emplace_back(std::make_shared<SynchronizeAndMoveStateChecker>());
_stateCheckers.emplace_back(std::make_shared<JoinBucketsStateChecker>());
_stateCheckers.emplace_back(std::make_shared<DeleteExtraCopiesStateChecker>());
_stateCheckers.emplace_back(std::make_shared<GarbageCollectionStateChecker>());
}
IdealStateManager::~IdealStateManager() = default;
void
IdealStateManager::print(std::ostream& out, bool verbose, const std::string& indent)
{
(void) verbose; (void) indent;
out << "IdealStateManager";
}
namespace {
/*
* Since state checkers are in prioritized order, don't allow
* overwriting if already explicitly set.
*/
bool
canOverwriteResult(const StateChecker::Result& existing, const StateChecker::Result& candidate)
{
return (!existing.getPriority().requiresMaintenance()
&& candidate.getPriority().requiresMaintenance());
}
}
StateChecker::Result
IdealStateManager::runStateCheckers(const StateChecker::Context& c) const
{
auto highestPri = StateChecker::Result::noMaintenanceNeeded();
// We go through _all_ active state checkers so that statistics can be
// collected across all checkers, not just the ones that are highest pri.
for (const auto & checker : _stateCheckers) {
if (!operation_context().distributor_config().stateCheckerIsActive(checker->getName())) {
LOG(spam, "Skipping state checker %s", checker->getName());
continue;
}
auto result = checker->check(c);
if (canOverwriteResult(highestPri, result)) {
highestPri = std::move(result);
}
}
return highestPri;
}
void
IdealStateManager::verify_only_live_nodes_in_context(const StateChecker::Context& c) const {
if (_has_logged_phantom_replica_warning) {
return;
}
for (const auto& n : c.entry()->getRawNodes()) {
const uint16_t index = n.getNode();
const auto& state = c.systemState.getNodeState(lib::Node(lib::NodeType::STORAGE, index));
// Only nodes in Up, Initializing or Retired should ever be present in the DB.
if (!state.getState().oneOf("uir")) {
LOG(error, "%s in bucket DB is on node %u, which is in unavailable state %s. Current cluster state is '%s'",
c.entry().getBucketId().toString().c_str(), index, state.getState().toString().c_str(),
c.systemState.toString().c_str());
ASSERT_ONCE_OR_LOG(false, "Bucket DB contains replicas on unavailable node", 10000);
_has_logged_phantom_replica_warning = true;
}
}
}
StateChecker::Result
IdealStateManager::generateHighestPriority(const document::Bucket& bucket, NodeMaintenanceStatsTracker& statsTracker) const
{
auto& distributorBucketSpace = _op_ctx.bucket_space_repo().get(bucket.getBucketSpace());
StateChecker::Context c(node_context(), operation_context(), distributorBucketSpace, statsTracker, bucket);
c.fillParentAndChildBuckets();
c.fillSiblingBucket();
const BucketDatabase::Entry* e(c.getEntryForPrimaryBucket());
if (!e) {
return StateChecker::Result::noMaintenanceNeeded();
}
LOG(spam, "Checking bucket %s", e->toString().c_str());
c.set_entry(*e);
verify_only_live_nodes_in_context(c);
return runStateCheckers(c);
}
MaintenancePriorityAndType
IdealStateManager::prioritize(const document::Bucket& bucket, NodeMaintenanceStatsTracker& statsTracker) const
{
StateChecker::Result generated(generateHighestPriority(bucket, statsTracker));
MaintenancePriority priority(generated.getPriority());
MaintenanceOperation::Type type(priority.requiresMaintenance()
? generated.getType()
: MaintenanceOperation::OPERATION_COUNT);
return {priority, type};
}
IdealStateOperation::SP
IdealStateManager::generateInterceptingSplit(BucketSpace bucketSpace, const BucketDatabase::Entry& e,
api::StorageMessage::Priority pri)
{
if ( ! e.valid()) return {};
NodeMaintenanceStatsTracker statsTracker;
document::Bucket bucket(bucketSpace, e.getBucketId());
auto& distributorBucketSpace = _op_ctx.bucket_space_repo().get(bucket.getBucketSpace());
StateChecker::Context c(node_context(), operation_context(), distributorBucketSpace, statsTracker, bucket);
c.set_entry(e);
IdealStateOperation::UP operation(_splitBucketStateChecker->check(c).createOperation());
if (operation.get()) {
operation->setPriority(pri);
operation->setIdealStateManager(this);
}
return operation;
}
MaintenanceOperation::SP
IdealStateManager::generate(const document::Bucket& bucket) const
{
NodeMaintenanceStatsTracker statsTracker;
IdealStateOperation::SP op(generateHighestPriority(bucket, statsTracker).createOperation());
if (op.get()) {
op->setIdealStateManager(const_cast<IdealStateManager*>(this));
}
return op;
}
std::vector<MaintenanceOperation::SP>
IdealStateManager::generateAll(const document::Bucket &bucket, NodeMaintenanceStatsTracker& statsTracker) const
{
auto& distributorBucketSpace = _op_ctx.bucket_space_repo().get(bucket.getBucketSpace());
StateChecker::Context c(node_context(), operation_context(), distributorBucketSpace, statsTracker, bucket);
c.fillParentAndChildBuckets();
c.fillSiblingBucket();
const BucketDatabase::Entry* e(c.getEntryForPrimaryBucket());
std::vector<MaintenanceOperation::SP> operations;
if (e) {
c.set_entry(*e);
} else {
return operations;
}
for (const auto & checker : _stateCheckers) {
IdealStateOperation::UP op(checker->check(c).createOperation());
if (op) {
operations.emplace_back(std::move(op));
}
}
return operations;
}
void
IdealStateManager::getBucketStatus(BucketSpace bucketSpace, const BucketDatabase::ConstEntryRef& entry,
NodeMaintenanceStatsTracker& statsTracker, std::ostream& out) const
{
document::Bucket bucket(bucketSpace, entry.getBucketId());
std::vector<MaintenanceOperation::SP> operations(generateAll(bucket, statsTracker));
if (operations.empty()) {
out << entry.getBucketId() << " : ";
} else {
out << "<b>" << entry.getBucketId() << ":</b> <i> : ";
}
for (uint32_t i = 0; i < operations.size(); ++i) {
const MaintenanceOperation& op(*operations[i]);
if (i > 0) {
out << ", ";
}
out << op.getName() << ": " << op.getDetailedReason();
}
if (!operations.empty()) {
out << "</i> ";
}
out << "[" << entry->toString() << "]<br>\n";
}
void
IdealStateManager::dump_bucket_space_db_status(document::BucketSpace bucket_space, std::ostream& out) const {
StatusBucketVisitor proc(*this, bucket_space, out);
auto& distributorBucketSpace = _op_ctx.bucket_space_repo().get(bucket_space);
distributorBucketSpace.getBucketDatabase().for_each_upper_bound(proc);
}
void
IdealStateManager::getBucketStatus(std::ostream& out) const {
LOG(debug, "Dumping bucket database valid at cluster state version %u",
operation_context().cluster_state_bundle().getVersion());
for (auto& space : _op_ctx.bucket_space_repo()) {
out << "<h2>" << document::FixedBucketSpaces::to_string(space.first) << " - " << space.first << "</h2>\n";
dump_bucket_space_db_status(space.first, out);
}
}
} // storage::distributor
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