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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/storage/distributor/bucket_spaces_stats_provider.h>
#include <vespa/storage/distributor/distributor_host_info_reporter.h>
#include <vespa/storage/distributor/min_replica_provider.h>
#include <tests/common/hostreporter/util.h>
#include <vespa/vespalib/data/slime/slime.h>
#include <vespa/vespalib/io/fileutil.h>
#include <vespa/vespalib/stllike/asciistream.h>
#include <vespa/vespalib/gtest/gtest.h>
namespace storage::distributor {
using PerNodeBucketSpacesStats = BucketSpacesStatsProvider::PerNodeBucketSpacesStats;
using End = vespalib::JsonStream::End;
using File = vespalib::File;
using Object = vespalib::JsonStream::Object;
using namespace ::testing;
struct DistributorHostInfoReporterTest : Test {
void verifyBucketSpaceStats(const vespalib::Slime& root,
uint16_t nodeIndex,
const vespalib::string& bucketSpaceName,
size_t bucketsTotal,
size_t bucketsPending);
void verifyBucketSpaceStats(const vespalib::Slime& root,
uint16_t nodeIndex,
const vespalib::string& bucketSpaceName);
};
using ms = std::chrono::milliseconds;
namespace {
// My kingdom for GoogleMock!
struct MockedMinReplicaProvider : MinReplicaProvider
{
std::unordered_map<uint16_t, uint32_t> minReplica;
std::unordered_map<uint16_t, uint32_t> getMinReplica() const override {
return minReplica;
}
};
struct MockedBucketSpacesStatsProvider : public BucketSpacesStatsProvider {
PerNodeBucketSpacesStats stats;
PerNodeBucketSpacesStats getBucketSpacesStats() const override {
return stats;
}
};
const vespalib::slime::Inspector&
getNode(const vespalib::Slime& root, uint16_t nodeIndex)
{
auto& storage_nodes = root.get()["distributor"]["storage-nodes"];
const size_t n = storage_nodes.entries();
for (size_t i = 0; i < n; ++i) {
if (storage_nodes[i]["node-index"].asLong() == nodeIndex) {
return storage_nodes[i];
}
}
throw std::runtime_error("No node found with index "
+ std::to_string(nodeIndex));
}
int
getMinReplica(const vespalib::Slime& root, uint16_t nodeIndex)
{
return getNode(root, nodeIndex)["min-current-replication-factor"].asLong();
}
const vespalib::slime::Inspector&
getBucketSpaceStats(const vespalib::Slime& root, uint16_t nodeIndex, const vespalib::string& bucketSpaceName)
{
const auto& bucketSpaces = getNode(root, nodeIndex)["bucket-spaces"];
for (size_t i = 0; i < bucketSpaces.entries(); ++i) {
if (bucketSpaces[i]["name"].asString().make_stringref() == bucketSpaceName) {
return bucketSpaces[i];
}
}
throw std::runtime_error("No bucket space found with name " + bucketSpaceName);
}
}
void
DistributorHostInfoReporterTest::verifyBucketSpaceStats(const vespalib::Slime& root,
uint16_t nodeIndex,
const vespalib::string& bucketSpaceName,
size_t bucketsTotal,
size_t bucketsPending)
{
const auto &stats = getBucketSpaceStats(root, nodeIndex, bucketSpaceName);
const auto &buckets = stats["buckets"];
EXPECT_EQ(bucketsTotal, static_cast<size_t>(buckets["total"].asLong()));
EXPECT_EQ(bucketsPending, static_cast<size_t>(buckets["pending"].asLong()));
}
void
DistributorHostInfoReporterTest::verifyBucketSpaceStats(const vespalib::Slime& root,
uint16_t nodeIndex,
const vespalib::string& bucketSpaceName)
{
const auto &stats = getBucketSpaceStats(root, nodeIndex, bucketSpaceName);
EXPECT_FALSE(stats["buckets"].valid());
}
struct Fixture {
MockedMinReplicaProvider minReplicaProvider;
MockedBucketSpacesStatsProvider bucketSpacesStatsProvider;
DistributorHostInfoReporter reporter;
Fixture()
: minReplicaProvider(),
bucketSpacesStatsProvider(),
reporter(minReplicaProvider, bucketSpacesStatsProvider)
{}
~Fixture() = default;
};
TEST_F(DistributorHostInfoReporterTest, min_replica_stats_are_reported) {
Fixture f;
std::unordered_map<uint16_t, uint32_t> minReplica;
minReplica[0] = 2;
minReplica[5] = 9;
f.minReplicaProvider.minReplica = minReplica;
vespalib::Slime root;
util::reporterToSlime(f.reporter, root);
EXPECT_EQ(2, getMinReplica(root, 0));
EXPECT_EQ(9, getMinReplica(root, 5));
}
TEST_F(DistributorHostInfoReporterTest, generate_example_json) {
Fixture f;
std::unordered_map<uint16_t, uint32_t> minReplica;
minReplica[0] = 2;
minReplica[5] = 9;
f.minReplicaProvider.minReplica = minReplica;
PerNodeBucketSpacesStats stats;
stats[0]["default"] = BucketSpaceStats(11, 3);
stats[0]["global"] = BucketSpaceStats(13, 5);
stats[5]["default"] = BucketSpaceStats();
f.bucketSpacesStatsProvider.stats = stats;
vespalib::asciistream json;
vespalib::JsonStream stream(json, true);
stream << Object();
f.reporter.report(stream);
stream << End();
stream.finalize();
std::string jsonString = json.str();
std::string path = "../../../../protocols/getnodestate/distributor.json";
std::string goldenString = File::readAll(path);
vespalib::Memory goldenMemory(goldenString);
vespalib::Slime goldenSlime;
vespalib::slime::JsonFormat::decode(goldenMemory, goldenSlime);
vespalib::Memory jsonMemory(jsonString);
vespalib::Slime jsonSlime;
vespalib::slime::JsonFormat::decode(jsonMemory, jsonSlime);
EXPECT_EQ(goldenSlime, jsonSlime);
}
TEST_F(DistributorHostInfoReporterTest, no_report_generated_if_disabled) {
Fixture f;
f.reporter.enableReporting(false);
std::unordered_map<uint16_t, uint32_t> minReplica;
minReplica[0] = 2;
minReplica[5] = 9;
f.minReplicaProvider.minReplica = minReplica;
vespalib::Slime root;
util::reporterToSlime(f.reporter, root);
EXPECT_EQ(0, root.get().children());
}
TEST_F(DistributorHostInfoReporterTest, bucket_spaces_stats_are_reported) {
Fixture f;
PerNodeBucketSpacesStats stats;
stats[1]["default"] = BucketSpaceStats(11, 3);
stats[1]["global"] = BucketSpaceStats(13, 5);
stats[2]["default"] = BucketSpaceStats(17, 7);
stats[2]["global"] = BucketSpaceStats();
stats[3]["default"] = BucketSpaceStats(19, 11);
f.bucketSpacesStatsProvider.stats = stats;
vespalib::Slime root;
util::reporterToSlime(f.reporter, root);
verifyBucketSpaceStats(root, 1, "default", 11, 3);
verifyBucketSpaceStats(root, 1, "global", 13, 5);
verifyBucketSpaceStats(root, 2, "default", 17, 7);
verifyBucketSpaceStats(root, 2, "global");
verifyBucketSpaceStats(root, 3, "default", 19, 11);
try {
verifyBucketSpaceStats(root, 3, "global");
FAIL() << "No exception thrown";
} catch (const std::runtime_error& ex) {
EXPECT_EQ("No bucket space found with name global", vespalib::string(ex.what()));
}
}
}
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