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/**
* Tests that downgrading a clean cluster with no data from latest to last-continuous binary version
* with downgradeOnDiskChanges:true succeeds.
*/
(function() {
"use strict";
load("jstests/multiVersion/libs/multi_rs.js");
load('jstests/multiVersion/libs/multi_cluster.js');
function testStandaloneDowngrade() {
const dbpath = MongoRunner.dataPath + jsTestName();
resetDbpath(dbpath);
let conn = MongoRunner.runMongod({dbpath: dbpath, binVersion: "latest"});
assert.neq(null, conn, "mongod was unable to start up with version=latest");
let adminDB = conn.getDB("admin");
checkFCV(adminDB, latestFCV);
jsTestLog("Downgrading FCV to last-continuous with {downgradeOnDiskChanges: true}");
assert.commandWorked(adminDB.runCommand(
{setFeatureCompatibilityVersion: lastContinuousFCV, downgradeOnDiskChanges: true}));
checkFCV(adminDB, lastContinuousFCV);
checkLog.contains(conn, "Downgrading on-disk format");
jsTestLog("Downgrading binary to last-continuous");
MongoRunner.stopMongod(conn);
conn =
MongoRunner.runMongod({dbpath: dbpath, binVersion: "last-continuous", noCleanData: true});
assert.neq(null,
conn,
"mongod was unable to start up with binary version=last-continuous" +
" and featureCompatibilityVersion=" + lastContinuousFCV);
adminDB = conn.getDB("admin");
checkFCV(adminDB, lastContinuousFCV);
MongoRunner.stopMongod(conn);
}
function testReplSetDowngrade() {
const replTest = new ReplSetTest({nodes: 2});
replTest.startSet();
replTest.initiate();
let primary = replTest.getPrimary();
let primaryAdminDB = primary.getDB("admin");
checkFCV(primaryAdminDB, latestFCV);
jsTestLog("Downgrading FCV to last-continuous with {downgradeOnDiskChanges: true}");
assert.commandWorked(primary.adminCommand(
{setFeatureCompatibilityVersion: lastContinuousFCV, downgradeOnDiskChanges: true}));
checkFCV(primaryAdminDB, lastContinuousFCV);
jsTestLog("Downgrading binary to last-continuous");
replTest.upgradeSet({binVersion: "last-continuous"});
primary = replTest.getPrimary();
primaryAdminDB = primary.getDB("admin");
checkFCV(primaryAdminDB, lastContinuousFCV);
replTest.stopSet();
}
function testShardingDowngrade() {
const st = new ShardingTest({
shards: {rs0: {nodes: 2}},
config: 1,
});
let configPrimaryAdminDB = st.configRS.getPrimary().getDB("admin");
let shardPrimaryAdminDB = st.rs0.getPrimary().getDB("admin");
checkFCV(configPrimaryAdminDB, latestFCV);
checkFCV(shardPrimaryAdminDB, latestFCV);
jsTestLog("Downgrading FCV to last-continuous with {downgradeOnDiskChanges: true}");
assert.commandWorked(st.s.adminCommand(
{setFeatureCompatibilityVersion: lastContinuousFCV, downgradeOnDiskChanges: true}));
checkFCV(configPrimaryAdminDB, lastContinuousFCV);
checkFCV(shardPrimaryAdminDB, lastContinuousFCV);
jsTestLog("Downgrading binary to last-continuous");
st.upgradeCluster('last-continuous');
configPrimaryAdminDB = st.configRS.getPrimary().getDB("admin");
shardPrimaryAdminDB = st.rs0.getPrimary().getDB("admin");
checkFCV(configPrimaryAdminDB, lastContinuousFCV);
checkFCV(shardPrimaryAdminDB, lastContinuousFCV);
st.stop();
}
testStandaloneDowngrade();
testReplSetDowngrade();
testShardingDowngrade();
}());
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