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/**
* Tests --repair correctly restores a missing feature compatibility version document on startup,
* and that regular startup without --repair fails if the FCV document is missing.
*/
(function() {
"use strict";
load("jstests/libs/feature_compatibility_version.js");
let dbpath = MongoRunner.dataPath + "feature_compatibility_version";
resetDbpath(dbpath);
let connection;
let adminDB;
const latest = "latest";
/**
* Ensure that a mongod (without using --repair) fails to start up if there are non-local
* collections and the FCV document in the admin database has been removed.
*
* The mongod has 'version' binary and is started up on 'dbpath'.
*/
let doStartupFailTests = function(version, dbpath) {
// Set up a mongod with an admin database but without a FCV document in the admin database.
setupMissingFCVDoc(version, dbpath);
// Now attempt to start up a new mongod without clearing the data files from 'dbpath', which
// contain the admin database but are missing the FCV document. The mongod should fail to
// start up if there is a non-local collection and the FCV document is missing.
let conn = MongoRunner.runMongod({dbpath: dbpath, binVersion: version, noCleanData: true});
assert.eq(null,
conn,
"expected mongod to fail when data files are present but no FCV document is found.");
};
/**
* Starts up a mongod with binary 'version' on 'dbpath', then removes the FCV document from the
* admin database and returns the mongod.
*/
let setupMissingFCVDoc = function(version, dbpath) {
let conn = MongoRunner.runMongod({dbpath: dbpath, binVersion: version});
assert.neq(
null, conn, "mongod was unable to start up with version=" + version + " and no data files");
adminDB = conn.getDB("admin");
removeFCVDocument(adminDB);
MongoRunner.stopMongod(conn);
return conn;
};
// Check that start up without --repair fails if there is non-local DB data and the FCV doc was
// deleted.
doStartupFailTests(latest, dbpath);
// --repair can be used to restore a missing featureCompatibilityVersion document to an existing
// admin database, as long as all collections have UUIDs. The FCV should be initialized to
// lastStableFCV / downgraded FCV.
connection = setupMissingFCVDoc(latest, dbpath);
let returnCode =
runMongoProgram("mongod", "--port", connection.port, "--repair", "--dbpath", dbpath);
assert.eq(
returnCode,
0,
"expected mongod --repair to execute successfully when restoring a missing FCV document.");
connection = MongoRunner.runMongod({dbpath: dbpath, binVersion: latest, noCleanData: true});
assert.neq(null,
connection,
"mongod was unable to start up with version=" + latest + " and existing data files");
adminDB = connection.getDB("admin");
assert.eq(adminDB.system.version.findOne({_id: "featureCompatibilityVersion"}).version,
lastStableFCV);
assert.eq(adminDB.system.version.findOne({_id: "featureCompatibilityVersion"}).targetVersion, null);
MongoRunner.stopMongod(connection);
// If the featureCompatibilityVersion document is present, --repair should just return success.
connection = MongoRunner.runMongod({dbpath: dbpath, binVersion: latest});
assert.neq(null,
connection,
"mongod was unable to start up with version=" + latest + " and no data files");
MongoRunner.stopMongod(connection);
returnCode = runMongoProgram("mongod", "--port", connection.port, "--repair", "--dbpath", dbpath);
assert.eq(returnCode, 0);
})();
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