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/**
* Tests that the "shard merge" protocol is enabled only in the proper FCV.
* @tags: [requires_fcv_51, featureFlagShardMerge]
*/
(function() {
"use strict";
load("jstests/replsets/libs/tenant_migration_util.js");
function runTest(downgradeFCV) {
let rst = new ReplSetTest({nodes: 1});
rst.startSet();
rst.initiate();
let primary = rst.getPrimary();
let adminDB = primary.getDB("admin");
const kDummyConnStr = "mongodb://localhost/?replicaSet=foo";
// A function, not a constant, to ensure unique UUIDs.
function donorStartMigrationCmd() {
return {
donorStartMigration: 1,
protocol: "shard merge",
tenantId: "foo",
migrationId: UUID(),
recipientConnectionString: kDummyConnStr,
readPreference: {mode: "primary"},
};
}
// Preconditions: the shard merge feature is enabled and our fresh RS is on the latest FCV.
assert(TenantMigrationUtil.isShardMergeEnabled(adminDB));
assert.eq(getFCVConstants().latest,
adminDB.system.version.findOne({_id: 'featureCompatibilityVersion'}).version);
// Shard merge is enabled, so this call will fail for some *other* reason, e.g. no certificates,
// recipient is unavailable.
let res = adminDB.runCommand(donorStartMigrationCmd());
assert.neq(res.code,
5949300,
"donorStartMigration shouldn't reject 'shard merge' protocol when it's enabled");
assert.commandWorked(adminDB.adminCommand({setFeatureCompatibilityVersion: downgradeFCV}));
// Now that FCV is downgraded, shard merge is automatically disabled.
assert.commandFailedWithCode(
adminDB.runCommand(donorStartMigrationCmd()),
5949300,
"donorStartMigration should reject 'shard merge' protocol when it's disabled");
rst.stopSet();
}
runFeatureFlagMultiversionTest('featureFlagShardMerge', runTest);
})();
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