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//
// Tests initialization of an empty cluster with multiple mongoses.
// Starts a bunch of mongoses in parallel, and ensures that there's only a single config
// version initialization.
//
// This test manually starts routers with the latest binary which can't connect to config server
// nodes using the last-lts binary because their wire versions are incompatible.
// @tags: [multiversion_incompatible]
//
var configRS = new ReplSetTest({name: "configRS", nodes: 3, useHostName: true});
configRS.startSet({configsvr: '', storageEngine: 'wiredTiger'});
var replConfig = configRS.getReplSetConfig();
replConfig.configsvr = true;
configRS.initiate(replConfig);
//
// Start a bunch of mongoses which will probably interfere
//
jsTest.log("Starting first set of mongoses in parallel...");
var mongoses = [];
for (var i = 0; i < 3; i++) {
var mongos = MongoRunner.runMongos(
{binVersion: "latest", configdb: configRS.getURL(), waitForConnect: false});
mongoses.push(mongos);
}
// Eventually connect to a mongo host, to be sure that the config upgrade happened
// (This can take longer on extremely slow bbots or VMs)
var mongosConn = null;
assert.soon(function() {
try {
mongosConn = new Mongo(mongoses[0].host);
return true;
} catch (e) {
print("Waiting for connect...");
printjson(e);
return false;
}
}, "Mongos " + mongoses[0].host + " did not start.", 5 * 60 * 1000);
var version = mongosConn.getCollection("config.version").findOne();
//
// Start a second set of mongoses which should respect the initialized version
//
jsTest.log("Starting second set of mongoses...");
for (var i = 0; i < 3; i++) {
var mongos = MongoRunner.runMongos(
{binVersion: "latest", configdb: configRS.getURL(), waitForConnect: false});
mongoses.push(mongos);
}
var connectToMongos = function(host) {
// Eventually connect to a host
assert.soon(function() {
try {
mongosConn = new Mongo(host);
return true;
} catch (e) {
print("Waiting for connect to " + host);
printjson(e);
return false;
}
}, "mongos " + host + " did not start.", 5 * 60 * 1000);
};
for (var i = 0; i < mongoses.length; i++) {
connectToMongos(mongoses[i].host);
}
// Shut down our mongoses now that we've tested them
for (var i = 0; i < mongoses.length; i++) {
MongoRunner.stopMongos(mongoses[i]);
}
//
// Check version and that the version was only updated once
//
assert.hasFields(version, ['clusterId'], "Version document does not contain cluster ID");
var oplog = configRS.getPrimary().getDB('local').oplog.rs;
var updates = oplog.find({ns: "config.version"}).toArray();
assert.eq(1, updates.length, 'ops to config.version: ' + tojson(updates));
configRS.stopSet(15);
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