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/**
* Tests for logging during FCV upgrade/downgrade.
* Three logs are involved:
* FCV upgrade or downgrade called (6744300)
* FCV is upgrading or downgrading (6744301)
* FCV upgrade or downgrade success (6744302).
*
* TODO SERVER-75391: Enable with config shards when config shards can downgrade FCV.
* @tags: [
* multiversion_incompatible,
* does_not_support_stepdowns,
* config_shard_incompatible,
* ]
*/
(function() {
"use strict";
load("jstests/libs/fail_point_util.js");
const latest = "latest";
const SetFCVStatus = Object.freeze({called: 1, transitioning: 2, successful: 3});
/**
* Helper function to assert logging information including FCV status and server type.
*/
function assertLogs(status, upgradeOrDowngrade, serverType, numShardServers) {
if (status >= SetFCVStatus.called) {
assert.soon(() => rawMongoProgramOutput().match(/\"id\":6744300/),
'"FCV ' + upgradeOrDowngrade + ' called" log not found');
} else {
assert(rawMongoProgramOutput().match(/\"id\":6744300/) == null,
'should not log but "FCV ' + upgradeOrDowngrade + ' called" log found');
}
if (status >= SetFCVStatus.transitioning) {
assert.soon(() => rawMongoProgramOutput().match(/\"id\":6744301/),
'"FCV ' + upgradeOrDowngrade + ' in progress" log not found');
} else {
assert(rawMongoProgramOutput().match(/\"id\":6744301/) == null,
'should not log but "FCV ' + upgradeOrDowngrade + ' in progress" log found');
}
if (status >= SetFCVStatus.successful) {
assert.soon(() => rawMongoProgramOutput().match(/\"id\":6744302/),
'"FCV ' + upgradeOrDowngrade + ' success" log not found');
} else {
assert(rawMongoProgramOutput().match(/\"id\":6744302/) == null,
'should not log but "FCV ' + upgradeOrDowngrade + ' success" log found');
}
if (serverType === "replica set/standalone") {
assert.soon(() => {
let matchRes =
rawMongoProgramOutput().match(/\"serverType\":"replica set\/standalone"/g);
return matchRes != null && matchRes.length == status;
}, "should have " + status + " log(s) with serverType: replica set/standalone");
} else if (serverType === "shardedCluster") {
assert.soon(() => {
let matchRes = rawMongoProgramOutput().match(/\"serverType\":"config server"/g);
return matchRes != null && matchRes.length == status;
}, "should have " + status + " log(s) with serverType: config server");
// If the FCV change failed before the config server reached the transitioning state,
// there should not be any logs containing 'shard server'.
if (status >= SetFCVStatus.transitioning) {
assert.soon(() => {
let matchRes = rawMongoProgramOutput().match(/\"serverType\":"shard server"/g);
return matchRes != null && matchRes.length == numShardServers * status;
}, "should have " + numShardServers * status + " log(s) with serverType: shard server");
} else {
assert(rawMongoProgramOutput().match(/\"serverType\":"shard server"/g) == null,
'should not have log containing shard server');
}
}
clearRawMongoProgramOutput(); // Clears output for next logging.
}
/**
* Test the correct logs are logged using failpoints:
*
* failBeforeTransitioning - set after FCV change is called and before setTargetVersion is set to
* true, therefore should only log 6744300 (called).
*
* failDowngrading/failUpgrading - set after setTargetVersion is true, inside the
* _runDowngrade/_runUpgrade function, therefore should only log 6744300 (called),
* 6744301 (transitioning).
*
* Each server type is tested with upgrade and downgrade with the two mentioned failpoints on/off.
*/
function assertLogsWithFailpoints(conn, adminDB, serverType, numShardServers) {
clearRawMongoProgramOutput(); // Clears output for next logging.
/* 1. Testing logging for downgrade */
// 1.1. Test that setFCV (downgrade) fails before moving to the transitional FCV:
// should have log 6744300 (called), but not 6744301 (transitioning) or 6744302 (successful).
jsTest.log("Case 1.1. Logs should show that downgrade has only reached 'called' stage.");
assert.commandWorked(
conn.adminCommand({configureFailPoint: 'failBeforeTransitioning', mode: "alwaysOn"}));
assert.commandFailed(adminDB.runCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
assertLogs(SetFCVStatus.called, "downgrade", serverType, numShardServers);
assert.commandWorked(
conn.adminCommand({configureFailPoint: 'failBeforeTransitioning', mode: "off"}));
// 1.2. Test that setFCV (downgrade) fails before finishing downgrading:
// should have log 6744300 (called), 6744301 (transitioning), but not 6744302 (successful).
jsTest.log("Case 1.2. Logs should show that downgrade has only reached 'downgrading' stage.");
assert.commandWorked(
conn.adminCommand({configureFailPoint: 'failDowngrading', mode: "alwaysOn"}));
assert.commandFailed(adminDB.runCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
assertLogs(SetFCVStatus.transitioning, "downgrade", serverType, numShardServers);
assert.commandWorked(conn.adminCommand({configureFailPoint: 'failDowngrading', mode: "off"}));
// 1.3. Test that setFCV (downgrade) succeeds:
// should have all three logs 6744300 (called), 6744301 (transitioning), 6744302 (successful).
jsTest.log("Case 1.3. Logs should show that downgrade has reached 'downgraded' stage.");
assert.commandWorked(adminDB.runCommand({setFeatureCompatibilityVersion: lastLTSFCV}));
assertLogs(SetFCVStatus.successful, "downgrade", serverType, numShardServers);
/* 2. Testing logging for upgrade */
// 2.1. Test that setFCV (upgrade) fails before moving to the transitional FCV:
// should have log 6744300 (called), but not 6744301 (transitioning) or 6744302 (successful).
jsTest.log("Case 2.1. Logs should show that upgrade has only reached 'called' stage.");
assert.commandWorked(
conn.adminCommand({configureFailPoint: 'failBeforeTransitioning', mode: "alwaysOn"}));
assert.commandFailed(adminDB.runCommand({setFeatureCompatibilityVersion: latestFCV}));
assertLogs(SetFCVStatus.called, "upgrade", serverType, numShardServers);
assert.commandWorked(
conn.adminCommand({configureFailPoint: 'failBeforeTransitioning', mode: "off"}));
// 2.2. Test that setFCV (upgrade) fails before finishing upgrading:
// should have log 6744300 (called), 6744301 (transitioning), but not 6744302 (successful).
jsTest.log("Case 2.2. Logs should show that upgrade has only reached 'upgrading' stage.");
assert.commandWorked(
conn.adminCommand({configureFailPoint: 'failUpgrading', mode: "alwaysOn"}));
assert.commandFailed(adminDB.runCommand({setFeatureCompatibilityVersion: latestFCV}));
assertLogs(SetFCVStatus.transitioning, "upgrade", serverType, numShardServers);
assert.commandWorked(conn.adminCommand({configureFailPoint: 'failUpgrading', mode: "off"}));
// 2.3. Test that setFCV (upgrade) succeeds:
// should have all three logs 6744300 (called), 6744301 (transitioning), 6744302 (successful).
jsTest.log("Case 2.3. Logs should show that upgrade has reached 'upgraded' stage.");
assert.commandWorked(adminDB.runCommand({setFeatureCompatibilityVersion: latestFCV}));
assertLogs(SetFCVStatus.successful, "upgrade", serverType, numShardServers);
// 2.4. Shouldn't log anything because we have already upgraded to latestFCV.
jsTest.log(
"Case 2.4. Logs should not contain fcv upgrade because it is already in upgraded state.");
assert.commandWorked(adminDB.runCommand({setFeatureCompatibilityVersion: latestFCV}));
// Ensure none of the logs have been output.
assertLogs(
0 /* status: no fcv change */, "upgrade", 0 /* serverType */, 0 /* numShardServers */);
}
function runStandaloneTest() {
// A 'latest' binary standalone should default to 'latestFCV'.
const conn = MongoRunner.runMongod({binVersion: latest});
assert.neq(
null, conn, "mongod was unable to start up with version=" + latest + " and no data files");
const adminDB = conn.getDB("admin");
checkFCV(adminDB, latestFCV);
jsTest.log("Checking for correct FCV logging on a standalone.");
assertLogsWithFailpoints(conn, adminDB, "replica set/standalone", 0 /*numShardServers*/);
MongoRunner.stopMongod(conn);
}
function runReplicaSetTest() {
const rst = new ReplSetTest({nodes: 2, nodeOpts: {binVersion: latest}});
rst.startSet();
rst.initiate();
const primary = rst.getPrimary();
const primaryAdminDB = primary.getDB("admin");
checkFCV(primaryAdminDB, latestFCV);
jsTest.log("Checking for correct FCV logging on a replica set.");
assertLogsWithFailpoints(
primary, primaryAdminDB, "replica set/standalone", 0 /*numShardServers*/);
rst.stopSet();
}
function runShardingTest() {
const st = new ShardingTest({
mongos: 1,
config: 1,
shards: 2,
other: {
mongosOptions: {binVersion: latest},
configOptions: {binVersion: latest},
rsOptions: {
binVersion: latest,
},
rs: {nodes: 2}
}
});
const mongosAdminDB = st.s.getDB("admin");
const configPrimaryAdminDB = st.configRS.getPrimary().getDB("admin");
const shardPrimaryAdminDB = st.rs0.getPrimary().getDB("admin");
checkFCV(configPrimaryAdminDB, latestFCV);
checkFCV(shardPrimaryAdminDB, latestFCV);
jsTest.log("Checking for correct FCV logging on a sharded cluster.");
assertLogsWithFailpoints(
st.configRS.getPrimary(), mongosAdminDB, "shardedCluster", 2 /*numShardServers*/);
st.stop();
}
runStandaloneTest();
runReplicaSetTest();
runShardingTest();
})();
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