397 lines
17 KiB
JavaScript
397 lines
17 KiB
JavaScript
/**
|
|
* Loading this file exposes ContinuousStepdown, which contains the "configure" function that
|
|
* extends the prototype for ReplSetTest to spawn a thread that continuously step down its primary
|
|
* node.
|
|
*
|
|
* ContinuousStepdown#configure takes a configuration object with the following options:
|
|
*
|
|
* configStepdown: boolean (default true)
|
|
* True if a stepdown thread should be started for the CSRS.
|
|
*
|
|
* electionTimeoutMS: number (default 5 seconds)
|
|
* The election timeout for the replica set.
|
|
*
|
|
* shardStepdown: boolean (default true)
|
|
* True if a stepdown thread should be started for each shard replica set.
|
|
*
|
|
* stepdownDurationSecs: number (default 10 seconds)
|
|
* Number of seconds after stepping down as primary for which the node is not re-electable.
|
|
*
|
|
* stepdownIntervalMS: number (default 8 seconds)
|
|
* Number of milliseconds to wait after issuing a step down command, and discovering the new
|
|
* primary.
|
|
*/
|
|
|
|
let ContinuousStepdown;
|
|
|
|
(function() {
|
|
"use strict";
|
|
|
|
load("jstests/libs/parallelTester.js"); // ScopedThread and CountDownLatch
|
|
load("jstests/libs/retry_on_network_error.js"); // retryOnNetworkError
|
|
load("jstests/replsets/rslib.js"); // reconfig
|
|
|
|
/**
|
|
* Helper class to manage the ScopedThread instance that will continuously step down the primary
|
|
* node.
|
|
*/
|
|
const StepdownThread = function() {
|
|
let _counter = null;
|
|
let _thread = null;
|
|
|
|
/**
|
|
* This function is intended to be called in a separate thread and it continuously
|
|
* steps down the current primary for a number of attempts.
|
|
*
|
|
* @param {CountDownLatch} stopCounter Object, which can be used to stop the thread.
|
|
*
|
|
* @param {string} seedNode The connection string of a node from which to discover
|
|
* the primary of the replica set.
|
|
*
|
|
* @param {Object} options Configuration object with the following fields:
|
|
* stepdownDurationSecs {integer}: The number of seconds after stepping down the
|
|
* primary for which the node is not re-electable.
|
|
* stepdownIntervalMS {integer}: The number of milliseconds to wait after
|
|
* issuing a step down command.
|
|
*
|
|
* @return Object with the following fields:
|
|
* ok {integer}: 0 if it failed, 1 if it succeeded.
|
|
* error {string}: Only present if ok == 0. Contains the cause for the error.
|
|
* stack {string}: Only present if ok == 0. Contains the stack at the time of
|
|
* the error.
|
|
*/
|
|
function _continuousPrimaryStepdownFn(stopCounter, seedNode, options) {
|
|
"use strict";
|
|
|
|
load("jstests/libs/retry_on_network_error.js");
|
|
|
|
print("*** Continuous stepdown thread running with seed node " + seedNode);
|
|
|
|
try {
|
|
// The config primary may unexpectedly step down during startup if under heavy
|
|
// load and too slowly processing heartbeats. When it steps down, it closes all of
|
|
// its connections. This can happen during the call to new ReplSetTest, so in order
|
|
// to account for this and make the tests stable, retry discovery of the replica
|
|
// set's configuration once (SERVER-22794).
|
|
const replSet = retryOnNetworkError(function() {
|
|
return new ReplSetTest(seedNode);
|
|
});
|
|
|
|
let primary = replSet.getPrimary();
|
|
|
|
while (stopCounter.getCount() > 0) {
|
|
print("*** Stepping down " + primary);
|
|
|
|
assert.throws(function() {
|
|
let result = primary.adminCommand(
|
|
{replSetStepDown: options.stepdownDurationSecs, force: true});
|
|
print("replSetStepDown command did not throw and returned: " +
|
|
tojson(result));
|
|
|
|
// The call to replSetStepDown should never succeed.
|
|
assert.commandWorked(result);
|
|
});
|
|
|
|
// Wait for primary to get elected and allow the test to make some progress
|
|
// before attempting another stepdown.
|
|
if (stopCounter.getCount() > 0) {
|
|
primary = replSet.getPrimary();
|
|
}
|
|
|
|
if (stopCounter.getCount() > 0) {
|
|
sleep(options.stepdownIntervalMS);
|
|
}
|
|
}
|
|
|
|
print("*** Continuous stepdown thread completed successfully");
|
|
return {ok: 1};
|
|
} catch (e) {
|
|
print("*** Continuous stepdown thread caught exception: " + tojson(e));
|
|
return {ok: 0, error: e.toString(), stack: e.stack};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns true if the stepdown thread has been created and started.
|
|
*/
|
|
this.hasStarted = function() {
|
|
return !!_thread;
|
|
};
|
|
|
|
/**
|
|
* Spawns a ScopedThread using the given seedNode to discover the replica set.
|
|
*/
|
|
this.start = function(seedNode, options) {
|
|
if (_thread) {
|
|
throw new Error("Continuous stepdown thread is already active");
|
|
}
|
|
|
|
_counter = new CountDownLatch(1);
|
|
_thread = new ScopedThread(_continuousPrimaryStepdownFn, _counter, seedNode, options);
|
|
_thread.start();
|
|
};
|
|
|
|
/**
|
|
* Sets the stepdown thread's counter to 0, and waits for it to finish. Throws if the
|
|
* stepdown thread did not exit successfully.
|
|
*/
|
|
this.stop = function() {
|
|
if (!_thread) {
|
|
throw new Error("Continuous stepdown thread is not active");
|
|
}
|
|
|
|
_counter.countDown();
|
|
_counter = null;
|
|
|
|
_thread.join();
|
|
|
|
const retVal = _thread.returnData();
|
|
_thread = null;
|
|
|
|
assert.commandWorked(retVal);
|
|
};
|
|
};
|
|
|
|
ContinuousStepdown = {};
|
|
|
|
/**
|
|
* Defines two methods on ReplSetTest, startContinuousFailover and stopContinuousFailover, that
|
|
* allow starting and stopping a separate thread that will periodically step down the replica
|
|
* set's primary node. Also defines these methods on ShardingTest, which allow starting and
|
|
* stopping a stepdown thread for the test's config server replica set and each of the shard
|
|
* replica sets, as specified by the given stepdownOptions object.
|
|
*/
|
|
ContinuousStepdown.configure = function(stepdownOptions,
|
|
{verbositySetting: verbositySetting = {}} = {}) {
|
|
const defaultOptions = {
|
|
configStepdown: true,
|
|
electionTimeoutMS: 5 * 1000,
|
|
shardStepdown: true,
|
|
stepdownDurationSecs: 10,
|
|
stepdownIntervalMS: 8 * 1000
|
|
};
|
|
stepdownOptions = Object.merge(defaultOptions, stepdownOptions);
|
|
|
|
verbositySetting = tojson(verbositySetting);
|
|
|
|
// Preserve the original ReplSetTest and ShardingTest constructors, because they are being
|
|
// overriden.
|
|
const originalReplSetTest = ReplSetTest;
|
|
const originalShardingTest = ShardingTest;
|
|
|
|
/**
|
|
* Overrides the ReplSetTest constructor to start the continuous primary stepdown thread.
|
|
*/
|
|
ReplSetTest = function ReplSetTestWithContinuousPrimaryStepdown() {
|
|
// Construct the original object
|
|
originalReplSetTest.apply(this, arguments);
|
|
|
|
// Preserve the original versions of functions that are overrided below.
|
|
const _originalStartSetFn = this.startSet;
|
|
const _originalStopSetFn = this.stopSet;
|
|
const _originalAwaitLastOpCommitted = this.awaitLastOpCommitted;
|
|
|
|
/**
|
|
* Overrides startSet call to increase logging verbosity.
|
|
*/
|
|
this.startSet = function(options) {
|
|
options = options || {};
|
|
options.setParameter = options.setParameter || {};
|
|
options.setParameter.logComponentVerbosity = verbositySetting;
|
|
return _originalStartSetFn.call(this, options);
|
|
};
|
|
|
|
/**
|
|
* Overrides stopSet to terminate the failover thread.
|
|
*/
|
|
this.stopSet = function() {
|
|
this.stopContinuousFailover({waitForPrimary: false});
|
|
_originalStopSetFn.apply(this, arguments);
|
|
};
|
|
|
|
/**
|
|
* Overrides awaitLastOpCommitted to retry on network errors.
|
|
*/
|
|
this.awaitLastOpCommitted = function() {
|
|
return retryOnNetworkError(_originalAwaitLastOpCommitted.bind(this));
|
|
};
|
|
|
|
// Handle for the continuous stepdown thread.
|
|
const _stepdownThread = new StepdownThread();
|
|
|
|
/**
|
|
* Reconfigures the replica set to change its election timeout to
|
|
* stepdownOptions.electionTimeoutMS so a new primary can get elected before the
|
|
* stepdownOptions.stepdownIntervalMS period would cause one to step down again, then
|
|
* starts the primary stepdown thread.
|
|
*/
|
|
this.startContinuousFailover = function() {
|
|
if (_stepdownThread.hasStarted()) {
|
|
throw new Error("Continuous failover thread is already active");
|
|
}
|
|
|
|
const rsconfig = this.getReplSetConfigFromNode();
|
|
if (rsconfig.settings.electionTimeoutMillis !== stepdownOptions.electionTimeoutMS) {
|
|
rsconfig.settings.electionTimeoutMillis = stepdownOptions.electionTimeoutMS;
|
|
rsconfig.version += 1;
|
|
reconfig(this, rsconfig);
|
|
assert.eq(this.getReplSetConfigFromNode().settings.electionTimeoutMillis,
|
|
stepdownOptions.electionTimeoutMS,
|
|
"Failed to set the electionTimeoutMillis to " +
|
|
stepdownOptions.electionTimeoutMS + " milliseconds.");
|
|
}
|
|
|
|
_stepdownThread.start(this.nodes[0].host, stepdownOptions);
|
|
};
|
|
|
|
/**
|
|
* Blocking method, which tells the thread running continuousPrimaryStepdownFn to stop
|
|
* and waits for it to terminate.
|
|
*
|
|
* If waitForPrimary is true, blocks until a new primary has been elected.
|
|
*/
|
|
this.stopContinuousFailover = function({waitForPrimary: waitForPrimary = false} = {}) {
|
|
if (!_stepdownThread.hasStarted()) {
|
|
return;
|
|
}
|
|
|
|
_stepdownThread.stop();
|
|
|
|
if (waitForPrimary) {
|
|
this.getPrimary();
|
|
}
|
|
};
|
|
};
|
|
|
|
Object.extend(ReplSetTest, originalReplSetTest);
|
|
|
|
/**
|
|
* Overrides the ShardingTest constructor to start the continuous primary stepdown thread.
|
|
*/
|
|
ShardingTest = function ShardingTestWithContinuousPrimaryStepdown(params) {
|
|
params.other = params.other || {};
|
|
|
|
if (stepdownOptions.configStepdown) {
|
|
params.other.configOptions = params.other.configOptions || {};
|
|
params.other.configOptions.setParameter =
|
|
params.other.configOptions.setParameter || {};
|
|
params.other.configOptions.setParameter.logComponentVerbosity = verbositySetting;
|
|
}
|
|
|
|
if (stepdownOptions.shardStepdown) {
|
|
params.other.shardOptions = params.other.shardOptions || {};
|
|
params.other.shardOptions.setParameter =
|
|
params.other.shardOptions.setParameter || {};
|
|
params.other.shardOptions.setParameter.logComponentVerbosity = verbositySetting;
|
|
}
|
|
|
|
// Construct the original object.
|
|
originalShardingTest.apply(this, arguments);
|
|
|
|
// Validate the stepdown options.
|
|
if (stepdownOptions.configStepdown && !this.configRS) {
|
|
throw new Error(
|
|
"Continuous config server primary step down only available with CSRS");
|
|
}
|
|
|
|
if (stepdownOptions.shardStepdown && this._rs.some(rst => !rst)) {
|
|
throw new Error(
|
|
"Continuous shard primary step down only available with replica set shards");
|
|
}
|
|
|
|
/**
|
|
* Calls startContinuousFailover on the config server and/or each shard replica set as
|
|
* specifed by the stepdownOptions object.
|
|
*/
|
|
this.startContinuousFailover = function() {
|
|
if (stepdownOptions.configStepdown) {
|
|
this.configRS.startContinuousFailover();
|
|
}
|
|
|
|
if (stepdownOptions.shardStepdown) {
|
|
this._rs.forEach(function(rst) {
|
|
rst.test.startContinuousFailover();
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Calls stopContinuousFailover on the config server and each shard replica set as
|
|
* specified by the stepdownOptions object.
|
|
*
|
|
* If waitForPrimary is true, blocks until each replica set has elected a primary.
|
|
* If waitForMongosRetarget is true, blocks until each mongos has an up to date view of
|
|
* the cluster.
|
|
*/
|
|
this.stopContinuousFailover = function({
|
|
waitForPrimary: waitForPrimary = false,
|
|
waitForMongosRetarget: waitForMongosRetarget = false
|
|
} = {}) {
|
|
if (stepdownOptions.configStepdown) {
|
|
this.configRS.stopContinuousFailover({waitForPrimary: waitForPrimary});
|
|
}
|
|
|
|
if (stepdownOptions.shardStepdown) {
|
|
this._rs.forEach(function(rst) {
|
|
rst.test.stopContinuousFailover({waitForPrimary: waitForPrimary});
|
|
});
|
|
}
|
|
|
|
if (waitForMongosRetarget) {
|
|
// Run validate on each collection in each database to ensure mongos can target
|
|
// the primary for each shard with data, including the config servers.
|
|
this._mongos.forEach(s => {
|
|
const res = assert.commandWorked(s.adminCommand({listDatabases: 1}));
|
|
res.databases.forEach(dbInfo => {
|
|
const startTime = Date.now();
|
|
print("Waiting for mongos: " + s.host + " to retarget db: " +
|
|
dbInfo.name);
|
|
|
|
const db = s.getDB(dbInfo.name);
|
|
assert.soon(() => {
|
|
let collInfo;
|
|
try {
|
|
collInfo = db.getCollectionInfos();
|
|
} catch (e) {
|
|
if (ErrorCodes.isNotMasterError(e.code)) {
|
|
return false;
|
|
}
|
|
throw e;
|
|
}
|
|
|
|
collInfo.forEach(collDoc => {
|
|
const res = db.runCommand({collStats: collDoc["name"]});
|
|
if (ErrorCodes.isNotMasterError(res.code)) {
|
|
return false;
|
|
}
|
|
assert.commandWorked(res);
|
|
});
|
|
|
|
return true;
|
|
});
|
|
const totalTime = Date.now() - startTime;
|
|
print("Finished waiting for mongos: " + s.host + " to retarget db: " +
|
|
dbInfo.name + ", in " + totalTime + " ms");
|
|
});
|
|
});
|
|
}
|
|
|
|
};
|
|
|
|
/**
|
|
* This method is disabled because it runs aggregation, which doesn't handle config
|
|
* server stepdown correctly.
|
|
*/
|
|
this.printShardingStatus = function() {};
|
|
};
|
|
|
|
Object.extend(ShardingTest, originalShardingTest);
|
|
|
|
// The checkUUIDsConsistentAcrossCluster() function is defined on ShardingTest's prototype,
|
|
// but ShardingTest's prototype gets reset when ShardingTest is reassigned. We reload the
|
|
// override to redefine checkUUIDsConsistentAcrossCluster() on the new ShardingTest's
|
|
// prototype.
|
|
load('jstests/libs/override_methods/check_uuids_consistent_across_cluster.js');
|
|
};
|
|
})();
|