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/**
* This test checks several upgrade/downgrade routines related to sharding, namely:
* - The entries in the config server's config.collections that were marked as 'dropped: true' are
* deleted. (SERVER-52630: Remove once 5.0 becomes the LastLTS)
*/
(function() {
"use strict";
load('./jstests/multiVersion/libs/multi_cluster.js'); // for upgradeCluster()
function setupInitialStateOnOldVersion() {
let csrs_config_db = st.configRS.getPrimary().getDB('config');
// Setup sharded collections
assert.commandWorked(st.s.adminCommand({enableSharding: 'sharded'}));
assert.commandWorked(st.s.adminCommand({shardCollection: 'sharded.foo', key: {x: 1}}));
assert.commandWorked(st.s.adminCommand({shardCollection: 'sharded.bar', key: {x: 1}}));
assert.neq(null, csrs_config_db.collections.findOne({_id: 'sharded.foo'}));
assert.neq(null, csrs_config_db.collections.findOne({_id: 'sharded.bar'}));
// Drop a collection so that it's metadata is left over on the config server's
// config.collections as 'dropped: true'
st.s.getDB('sharded').foo.drop();
assert.eq(true, csrs_config_db.collections.findOne({_id: 'sharded.foo'}).dropped);
assert.neq(null, csrs_config_db.collections.findOne({_id: 'sharded.bar'}));
}
function runChecksAfterUpgrade() {
let csrs_config_db = st.configRS.getPrimary().getDB('config');
// Check that the left over metadata at csrs config.collections has been cleaned up.
assert.eq(null, csrs_config_db.collections.findOne({_id: 'sharded.foo'}));
assert.neq(null, csrs_config_db.collections.findOne({_id: 'sharded.bar'}));
}
function runChecksAfterDowngrade() {
}
// Start a sharded cluster on version 4.4
let old_version = '4.4';
var st = new ShardingTest({
shards: 2,
mongos: 1,
other: {
mongosOptions: {binVersion: old_version},
configOptions: {binVersion: old_version},
shardOptions: {binVersion: old_version},
rsOptions: {binVersion: old_version},
rs: true,
}
});
st.configRS.awaitReplication();
// Setup initial conditions on 4.4
setupInitialStateOnOldVersion();
// Upgrade the entire cluster to the latest version.
jsTest.log('upgrading cluster');
st.upgradeCluster('latest');
assert.commandWorked(st.s.adminCommand({setFeatureCompatibilityVersion: latestFCV}));
// Tests after upgrade
runChecksAfterUpgrade();
// Downgrade back to 4.4
jsTest.log('downgrading cluster');
assert.commandWorked(st.s.adminCommand({setFeatureCompatibilityVersion: old_version}));
st.upgradeCluster(old_version);
// Tests after downgrade to 4.4
runChecksAfterDowngrade();
st.stop();
})();
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