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/**
* Tests restarting the catalog in a sharded cluster on the config server and the shards.
* @tags: [requires_replication, requires_sharding, requires_majority_read_concern]
*/
(function() {
"use strict";
// Only run this test if the storage engine is "wiredTiger" or "inMemory".
const acceptedStorageEngines = ["wiredTiger", "inMemory"];
const currentStorageEngine = jsTest.options().storageEngine || "wiredTiger";
if (!acceptedStorageEngines.includes(currentStorageEngine)) {
jsTest.log("Refusing to run restartCatalog test on " + currentStorageEngine +
" storage engine");
return;
}
// Helper function for sorting documents in JavaScript.
function sortOn(fieldName) {
return (doc1, doc2) => {
return bsonWoCompare({_: doc1[fieldName]}, {_: doc2[fieldName]});
};
}
const st = new ShardingTest({
name: "restart_catalog_sharded_cluster",
mongos: 1,
config: 1,
shards: {
rs: true,
rs0: {nodes: 1},
rs1: {nodes: 1},
},
other: {
enableBalancer: false,
configOptions: {setParameter: "enableTestCommands=1"},
shardOptions: {setParameter: "enableTestCommands=1"},
}
});
const mongos = st.s0;
const shard0 = st.shard0;
const shard1 = st.shard1;
const dbName = "drinks";
// Create a sharded collection and distribute chunks amongst the shards.
const coffees = [
{_id: "americano", price: 1.5},
{_id: "espresso", price: 2.0},
{_id: "starbucks", price: 1000.0}
];
const coffeeColl = mongos.getDB(dbName).getCollection("coffee");
assert.commandWorked(mongos.adminCommand({enableSharding: dbName}));
st.ensurePrimaryShard(dbName, shard0.shardName);
assert.commandWorked(
mongos.adminCommand({shardCollection: coffeeColl.getFullName(), key: {price: 1}}));
const splitPoint = 50.0;
assert.commandWorked(
mongos.adminCommand({split: coffeeColl.getFullName(), middle: {price: splitPoint}}));
for (let coffee of coffees) {
assert.commandWorked(coffeeColl.insert(coffee, {writeConcern: {w: "majority"}}));
}
assert.commandWorked(mongos.adminCommand({
moveChunk: coffeeColl.getFullName(),
find: {price: 1000.0},
to: shard1.shardName,
_waitForDelete: true
}));
assert.commandWorked(mongos.adminCommand({
moveChunk: coffeeColl.getFullName(),
find: {price: 0.0},
to: shard0.shardName,
_waitForDelete: true
}));
// Create an unsharded collection and throw some data in.
const teaColl = mongos.getDB(dbName).getCollection("tea");
const teas =
[{_id: "darjeeling", price: 2.0}, {_id: "earl gray", price: 1.5}, {_id: "sencha", price: 3.5}];
for (let tea of teas) {
assert.commandWorked(teaColl.insert(tea, {writeConcern: {w: "majority"}}));
}
// Run queries on both the sharded and unsharded collection.
function assertShardsHaveExpectedData() {
const dbShard0 = shard0.getDB(dbName);
const dbShard1 = shard1.getDB(dbName);
// Assert that we can find all documents in the unsharded collection by either asking
// mongos, or consulting the primary shard directly.
assert.eq(teaColl.find().sort({_id: 1}).readConcern("majority").toArray(),
teas.sort(sortOn("_id")),
"couldn't find all unsharded data via mongos");
assert.eq(dbShard0.tea.find().sort({_id: 1}).toArray(),
teas.sort(sortOn("_id")),
"couldn't find all unsharded data directly via primary shard");
assert.eq(teaColl.find().sort({price: 1}).toArray(), teas.sort(sortOn("price")));
// Assert that we can find all documents in the sharded collection via scatter-gather.
assert.eq(coffeeColl.find().sort({_id: 1}).readConcern("majority").toArray(),
coffees.sort(sortOn("_id")),
"couldn't find all sharded data via mongos scatter-gather");
// Assert that we can find all documents via a query that targets multiple shards.
assert.eq(coffeeColl.find({price: {$gt: 0}}).sort({price: 1}).toArray(),
coffees.sort(sortOn("price")),
"couldn't find all sharded data via mongos multi-shard targeted query");
// Assert that we can find all sharded documents on shard0 by shard targeting via mongos,
// and by consulting shard0 directly.
const dataShard0 = coffees.filter(drink => drink.price < splitPoint).sort(sortOn("_id"));
assert.eq(coffeeColl.find({price: {$lt: splitPoint}}).sort({_id: 1}).toArray(),
dataShard0,
"couldn't find shard0 data via targeting through mongos");
jsTest.log(tojson(dbShard0.getCollectionInfos()));
assert.eq(dbShard0.coffee.find().toArray(),
dataShard0,
"couldn't find shard0 data by directly asking shard0");
// Assert that we can find all sharded documents on shard1 by shard targeting via mongos,
// and by consulting shard1 directly.
const dataShard1 = coffees.filter(drink => drink.price >= splitPoint).sort(sortOn("_id"));
assert.eq(coffeeColl.find({price: {$gte: splitPoint}}).sort({_id: 1}).toArray(),
dataShard1,
"couldn't find shard1 data via targeting through mongos");
assert.eq(dbShard1.coffee.find().toArray(),
dataShard1,
"couldn't find shard1 data by directly asking shard1");
}
assertShardsHaveExpectedData();
// Run queries on the metadata stored in the config servers.
function assertConfigServersHaveExpectedData() {
const configDBViaMongos = mongos.getDB("config");
const configDBViaConfigSvr = st.config0.getDB("config");
const projectOnlyShard = {_id: 0, shard: 1};
// Assert that we can find documents for chunk metadata, both via mongos and by asking the
// config server primary directly.
const smallestChunk = {"max.price": splitPoint};
const smallestChunkShard = {shard: "restart_catalog_sharded_cluster-rs0"};
assert.eq(configDBViaMongos.chunks.find(smallestChunk, projectOnlyShard).toArray(),
[smallestChunkShard]);
assert.eq(configDBViaConfigSvr.chunks.find(smallestChunk, projectOnlyShard).toArray(),
[smallestChunkShard]);
const largestChunk = {"min.price": splitPoint};
const largestChunkShard = {shard: "restart_catalog_sharded_cluster-rs1"};
assert.eq(configDBViaMongos.chunks.find(largestChunk, projectOnlyShard).toArray(),
[largestChunkShard]);
assert.eq(configDBViaConfigSvr.chunks.find(largestChunk, projectOnlyShard).toArray(),
[largestChunkShard]);
}
assertConfigServersHaveExpectedData();
// Restart the catalog on the config server primary, then assert that both collection data and
// sharding metadata are as expected.
assert.commandWorked(st.config0.getDB("admin").runCommand({restartCatalog: 1}));
assertConfigServersHaveExpectedData();
assertShardsHaveExpectedData();
// Remember what indexes are present, then restart the catalog on all shards via mongos.
const teaIndexesBeforeRestart = teaColl.getIndexes().sort(sortOn("_id"));
const coffeeIndexesBeforeRestart = coffeeColl.getIndexes().sort(sortOn("_id"));
assert.commandWorked(mongos.adminCommand({restartCatalog: 1}));
// Verify that the data in the collections and the metadata have not changed.
assertConfigServersHaveExpectedData();
assertShardsHaveExpectedData();
// Verify that both the sharded and unsharded collection have the same indexes as prior to the
// restart.
const teaIndexesAfterRestart = teaColl.getIndexes().sort(sortOn("_id"));
assert.eq(teaIndexesBeforeRestart, teaIndexesAfterRestart);
const coffeeIndexesAfterRestart = coffeeColl.getIndexes().sort(sortOn("_id"));
assert.eq(coffeeIndexesBeforeRestart, coffeeIndexesAfterRestart);
// Create new indexes on both collections and verify that queries return the same results.
[teaColl, coffeeColl].forEach(coll => {
assert.commandWorked(coll.createIndex({price: -1}));
assert.commandWorked(coll.createIndex({price: 1, _id: 1}));
});
assertShardsHaveExpectedData();
// Modify the existing collections.
const validator = {
price: {$gt: 0}
};
[teaColl, coffeeColl].forEach(coll => {
assert.commandWorked(coll.runCommand("collMod", {validator: validator}));
assert.writeErrorWithCode(coll.insert({price: -1}), ErrorCodes.DocumentValidationFailure);
});
// Perform another write, implicitly creating a new collection and database.
const secondTestDB = mongos.getDB("restart_catalog_sharded_cluster_2");
const foodColl = secondTestDB.getCollection("food");
const doc = {
_id: "apple",
category: "fruit"
};
assert.commandWorked(foodColl.insert(doc));
assert.commandWorked(foodColl.createIndex({category: 1}));
assert.eq(foodColl.find().toArray(), [doc]);
// Shard the new collection and verify we can find its data again.
assert.commandWorked(mongos.adminCommand({enableSharding: secondTestDB.getName()}));
assert.commandWorked(
mongos.adminCommand({shardCollection: foodColl.getFullName(), key: {category: 1}}));
assert.eq(foodColl.find().toArray(), [doc]);
// Build a new index on the new collection.
assert.commandWorked(foodColl.createIndex({category: -1}));
assert.eq(foodColl.find().hint({category: -1}).toArray(), [doc]);
st.stop();
}());
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