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/**
* Tests the basic functionality of the resharding metrics section in server status.
*
* @tags: [
* requires_fcv_49,
* uses_atclustertime,
* ]
*/
(function() {
'use strict';
load("jstests/libs/discover_topology.js");
load("jstests/sharding/libs/resharding_test_fixture.js");
const kNamespace = "reshardingDb.coll";
function verifyMetrics(metrics, expected) {
for (var key in expected) {
assert(metrics.hasOwnProperty(key), `Missing ${key} in ${tojson(metrics)}`);
const expectedValue = expected[key];
// The contract for this method is to treat `undefined` as an indication for non-important
// or non-deterministic values.
if (expectedValue === undefined)
continue;
assert.eq(metrics[key],
expectedValue,
`Expected the value for ${key} to be ${expectedValue}: ${tojson(metrics)}`);
}
}
function testMetricsArePresent(mongo, expectedMetrics) {
const stats = mongo.getDB('admin').serverStatus({});
assert(stats.hasOwnProperty('shardingStatistics'), stats);
const shardingStats = stats.shardingStatistics;
assert(shardingStats.hasOwnProperty('resharding'),
`Missing resharding section in ${tojson(shardingStats)}`);
const metrics = shardingStats.resharding;
verifyMetrics(metrics, expectedMetrics);
}
function verifyParticipantServerStatusOutput(reshardingTest, inputCollection, expectedMetrics) {
const donorShardNames = reshardingTest.donorShardNames;
const recipientShardNames = reshardingTest.recipientShardNames;
const mongos = inputCollection.getMongo();
const topology = DiscoverTopology.findConnectedNodes(mongos);
testMetricsArePresent(new Mongo(topology.shards[donorShardNames[0]].primary), expectedMetrics);
testMetricsArePresent(new Mongo(topology.shards[donorShardNames[1]].primary), expectedMetrics);
testMetricsArePresent(new Mongo(topology.shards[recipientShardNames[0]].primary),
expectedMetrics);
testMetricsArePresent(new Mongo(topology.shards[recipientShardNames[1]].primary),
expectedMetrics);
}
function verifyCoordinatorServerStatusOutput(inputCollection, expectedMetrics) {
const mongos = inputCollection.getMongo();
const topology = DiscoverTopology.findConnectedNodes(mongos);
testMetricsArePresent(new Mongo(topology.configsvr.primary), expectedMetrics);
}
// Tests the currentOp output for each donor, each recipient, and the coordinator.
function checkCurrentOp(mongo, clusterName, role, expected) {
function getCurrentOpReport(mongo, role) {
return mongo.getDB("admin").currentOp(
{ns: kNamespace, desc: {$regex: 'Resharding' + role + 'Service.*'}});
}
jsTest.log(`Testing currentOp output for ${role}s on ${clusterName}`);
assert.soon(() => {
const report = getCurrentOpReport(mongo, role);
if (report.inprog.length === 1)
return true;
jsTest.log(tojson(report));
return false;
}, () => `: was unable to find resharding ${role} service in currentOp output`);
verifyMetrics(getCurrentOpReport(mongo, role).inprog[0], expected);
}
function verifyCurrentOpOutput(reshardingTest, inputCollection) {
// Wait for the resharding operation and the donor services to start.
const mongos = inputCollection.getMongo();
assert.soon(() => {
const coordinatorDoc = mongos.getCollection("config.reshardingOperations").findOne({
ns: inputCollection.getFullName()
});
return coordinatorDoc !== null && coordinatorDoc.cloneTimestamp !== undefined;
});
const topology = DiscoverTopology.findConnectedNodes(mongos);
reshardingTest.donorShardNames.forEach(function(shardName) {
checkCurrentOp(new Mongo(topology.shards[shardName].primary), shardName, "Donor", {
"type": "op",
"op": "command",
"ns": kNamespace,
"originatingCommand": undefined,
"totalOperationTimeElapsedSecs": undefined,
"countWritesDuringCriticalSection": 0,
"totalCriticalSectionTimeElapsedSecs": undefined,
"donorState": undefined,
"opStatus": "running",
});
});
reshardingTest.recipientShardNames.forEach(function(shardName) {
checkCurrentOp(new Mongo(topology.shards[shardName].primary), shardName, "Recipient", {
"type": "op",
"op": "command",
"ns": kNamespace,
"originatingCommand": undefined,
"totalOperationTimeElapsedSecs": undefined,
"remainingOperationTimeEstimatedSecs": undefined,
"approxDocumentsToCopy": undefined,
"approxBytesToCopy": undefined,
"documentsCopied": undefined,
"bytesCopied": undefined,
"totalCopyTimeElapsedSecs": undefined,
"oplogEntriesFetched": undefined,
"oplogEntriesApplied": undefined,
"totalApplyTimeElapsedSecs": undefined,
"recipientState": undefined,
"opStatus": "running",
});
});
checkCurrentOp(new Mongo(topology.configsvr.nodes[0]), "configsvr", "Coordinator", {
"type": "op",
"op": "command",
"ns": kNamespace,
"originatingCommand": undefined,
"totalOperationTimeElapsedSecs": undefined,
"coordinatorState": undefined,
"opStatus": "running",
});
}
const reshardingTest = new ReshardingTest({numDonors: 2, numRecipients: 2, reshardInPlace: true});
reshardingTest.setup();
const donorShardNames = reshardingTest.donorShardNames;
const inputCollection = reshardingTest.createShardedCollection({
ns: kNamespace,
shardKeyPattern: {oldKey: 1},
chunks: [
{min: {oldKey: MinKey}, max: {oldKey: 0}, shard: donorShardNames[0]},
{min: {oldKey: 0}, max: {oldKey: MaxKey}, shard: donorShardNames[1]},
],
});
var initialServerStatusMetrics = {
"countReshardingOperations": 0,
"countReshardingSuccessful": 0,
"countReshardingFailures": 0,
"countReshardingCanceled": 0,
"documentsCopied": 0,
"bytesCopied": 0,
"oplogEntriesApplied": 0,
"countWritesDuringCriticalSection": 0,
"lastOpEndingChunkImbalance": 0,
};
verifyParticipantServerStatusOutput(reshardingTest, inputCollection, initialServerStatusMetrics);
verifyCoordinatorServerStatusOutput(inputCollection, {lastOpEndingChunkImbalance: 0});
var documentsInserted = [
{_id: "stays on shard0", oldKey: -10, newKey: -10},
{_id: "moves to shard0", oldKey: 10, newKey: -10},
{_id: "moves to shard1", oldKey: -10, newKey: 10},
{_id: "stays on shard1", oldKey: 10, newKey: 10},
];
assert.commandWorked(inputCollection.insert(documentsInserted));
const recipientShardNames = reshardingTest.recipientShardNames;
reshardingTest.withReshardingInBackground( //
{
newShardKeyPattern: {newKey: 1},
newChunks: [
{min: {newKey: MinKey}, max: {newKey: 0}, shard: recipientShardNames[0]},
{min: {newKey: 0}, max: {newKey: 10}, shard: recipientShardNames[1]},
{min: {newKey: 10}, max: {newKey: 20}, shard: recipientShardNames[1]},
{min: {newKey: 20}, max: {newKey: 30}, shard: recipientShardNames[1]},
{min: {newKey: 30}, max: {newKey: MaxKey}, shard: recipientShardNames[1]},
],
},
(tempNs) => {
verifyCurrentOpOutput(reshardingTest, inputCollection);
});
var finalServerStatusMetrics = {
"countReshardingOperations": 1,
"countReshardingSuccessful": 1,
"countReshardingFailures": 0,
"countReshardingCanceled": 0,
"documentsCopied": 2,
"bytesCopied": Object.bsonsize(documentsInserted[1]) + Object.bsonsize(documentsInserted[2]),
"oplogEntriesApplied": 2,
"countWritesDuringCriticalSection": 0,
"lastOpEndingChunkImbalance": 0,
};
verifyParticipantServerStatusOutput(reshardingTest, inputCollection, finalServerStatusMetrics);
verifyCoordinatorServerStatusOutput(inputCollection, {lastOpEndingChunkImbalance: 3});
reshardingTest.teardown();
})();
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