mongodb/jstests/sharding/addshard1.js

import {ReplSetTest} from "jstests/libs/replsettest.js";
import {ShardingTest} from "jstests/libs/shardingtest.js";
import {findChunksUtil} from "jstests/sharding/libs/find_chunks_util.js";
import {
    moveDatabaseAndUnshardedColls
} from "jstests/sharding/libs/move_database_and_unsharded_coll_helper.js";

var s = new ShardingTest({name: "add_shard1", shards: 1, useHostname: false});

// Create a shard and add a database; if the database is not duplicated the mongod should accept
// it as shard
var rs1 = new ReplSetTest({name: "addshard1-1", host: 'localhost', nodes: 1});
rs1.startSet({shardsvr: ""});
rs1.initiate();

var db1 = rs1.getPrimary().getDB("testDB");

var numObjs = 3;
for (var i = 0; i < numObjs; i++) {
    assert.commandWorked(db1.foo.save({a: i}));
}

var configDB = s.s.getDB('config');
assert.eq(null, configDB.databases.findOne({_id: 'testDB'}));

var newShard = "myShard";
assert.commandWorked(s.admin.runCommand({addShard: rs1.getURL(), name: newShard}));

assert.neq(null, configDB.databases.findOne({_id: 'testDB'}));

var newShardDoc = configDB.shards.findOne({_id: newShard});
assert(newShardDoc.topologyTime instanceof Timestamp);

// maxSize field is no longer supported
var newShardMaxSize = "myShardMaxSize";
assert.commandFailedWithCode(
    s.admin.runCommand({addShard: rs1.getURL(), name: newShardMaxSize, maxSize: 1024}),
    ErrorCodes.InvalidOptions);

// a mongod with an existing database name should not be allowed to become a shard
var rs2 = new ReplSetTest({name: "addshard1-2", nodes: 1});
rs2.startSet({shardsvr: ""});
rs2.initiate();

var db2 = rs2.getPrimary().getDB("otherDB");
assert.commandWorked(db2.foo.save({a: 1}));

var db3 = rs2.getPrimary().getDB("testDB");
assert.commandWorked(db3.foo.save({a: 1}));

s.config.databases.find().forEach(printjson);

var rejectedShard = "rejectedShard";
assert(!s.admin.runCommand({addShard: rs2.getURL(), name: rejectedShard}).ok,
       "accepted mongod with duplicate db");

// Check that all collection that were local to the mongod's are accessible through the mongos
var sdb1 = s.getDB("testDB");
assert.eq(numObjs, sdb1.foo.count(), "wrong count for database that existed before addshard");

var sdb2 = s.getDB("otherDB");
assert.eq(0, sdb2.foo.count(), "database of rejected shard appears through mongos");

// make sure we can move a DB from the original mongod to a previoulsy existing shard
assert.eq(s.normalize(s.config.databases.findOne({_id: "testDB"}).primary),
          newShard,
          "DB primary is wrong");

var origShard = s.getNonPrimaries("testDB")[0];
moveDatabaseAndUnshardedColls(s.s.getDB("testDB"), origShard);

assert.eq(s.normalize(s.config.databases.findOne({_id: "testDB"}).primary),
          origShard,
          "DB primary didn't move");
assert.eq(
    numObjs, sdb1.foo.count(), "wrong count after moving datbase that existed before addshard");

// make sure we can shard the original collections
sdb1.foo.createIndex({a: 1}, {unique: true});  // can't shard populated collection without an index
s.adminCommand({enablesharding: "testDB"});
s.adminCommand({shardcollection: "testDB.foo", key: {a: 1}});
s.adminCommand({split: "testDB.foo", middle: {a: Math.floor(numObjs / 2)}});
assert.eq(2,
          findChunksUtil.countChunksForNs(s.config, "testDB.foo"),
          "wrong chunk number after splitting collection that existed before");
assert.eq(numObjs, sdb1.foo.count(), "wrong count after splitting collection that existed before");

s.stop();
rs1.stopSet();
rs2.stopSet();