mongo/jstests/replsets/config_server_checks.js

/*
 * Tests various combinations of the configsvr field in replica set configurations and the
 * command line options that control whether a node can function as a member of a CSRS.
 */

function expectState(rst, state) {
    assert.soon(function() {
                    var status = rst.status();
                    if (status.myState != state) {
                        print("Waiting for state " + state +
                              " in replSetGetStatus output: " + tojson(status));
                    }
                    return status.myState == state;
                });
}

(function() {
"use strict";

(function() {
// Test that node with --configsvr cmd line and configsvr in replset config goes
// into REMOVED state if storage engine is not WiredTiger
jsTestLog("configsvr in rs config and --configsvr cmd line, but mmapv1");
var rst = new ReplSetTest({name: "configrs3", nodes: 1, nodeOptions: {configsvr: "",
                                                                      journal: "",
                                                                      storageEngine: "mmapv1"}});

rst.startSet();
var conf = rst.getReplSetConfig();
conf.configsvr = true;
try {
    rst.nodes[0].adminCommand({replSetInitiate: conf});
} catch (e) {
    // expected since we close all connections after going into REMOVED
}
expectState(rst, ReplSetTest.State.REMOVED);
rst.stopSet();
})();

(function() {
// Test that node with --configsvr cmd line and configsvr in replset config does NOT go
// into REMOVED state if storage engine is not WiredTiger but we're running in SCCC mode
jsTestLog("configsvr in rs config and --configsvr cmd line, but mmapv1 with configSvrMode=sccc");
var rst = new ReplSetTest({name: "configrs4", nodes: 1, nodeOptions: {configsvr: "",
                                                                      journal: "",
                                                                      storageEngine: "mmapv1",
                                                                      configsvrMode: "sccc"}});

rst.startSet();
var conf = rst.getReplSetConfig();
conf.configsvr = true;
assert.commandWorked(rst.nodes[0].adminCommand({replSetInitiate: conf}));

rst.getPrimary();
expectState(rst, ReplSetTest.State.PRIMARY);
rst.stopSet();
})();

(function() {
// Test that node with --configsvr cmd line and configsvr in replset config and using wiredTiger
// does NOT go into REMOVED state.
jsTestLog("configsvr in rs config and --configsvr cmd line, normal case");
var rst = new ReplSetTest({name: "configrs5",
                           nodes: 1,
                           nodeOptions: {configsvr: "",
                                         journal: "",
                                         storageEngine: "wiredTiger"}});

rst.startSet();
var conf = rst.getReplSetConfig();
conf.configsvr = true;
assert.commandWorked(rst.nodes[0].adminCommand({replSetInitiate: conf}));

rst.getPrimary();
expectState(rst, ReplSetTest.State.PRIMARY);

var conf = rst.getPrimary().getDB('local').system.replset.findOne();
assert(conf.configsvr, tojson(conf));

rst.stopSet();
})();

(function() {
// Test that node with --configsvr cmd line and initiated with an empty replset config
// will result in configsvr:true getting automatically added to the config (SERVER-20247).
jsTestLog("--configsvr cmd line, empty config to replSetInitiate");
var rst = new ReplSetTest({name: "configrs6",
                           nodes: 1,
                           nodeOptions: {configsvr: "",
                                         journal: "",
                                         storageEngine: "wiredTiger"}});

rst.startSet();
assert.commandWorked(rst.nodes[0].adminCommand({replSetInitiate: 1}));

rst.getPrimary();
expectState(rst, ReplSetTest.State.PRIMARY);
rst.stopSet();
})();

(function() {
// Test that a set initialized without --configsvr but then restarted with --configsvr will fail to
// start up and won't automatically add "configsvr" to the replset config (SERVER-21236).
jsTestLog("set initiated without configsvr, restarted adding --configsvr cmd line");
var rst = new ReplSetTest({name: "configrs7",
                           nodes: 1,
                           nodeOptions: {journal: "",
                                         storageEngine: "wiredTiger"}});

rst.startSet();
var conf = rst.getReplSetConfig();
assert.commandWorked(rst.nodes[0].adminCommand({replSetInitiate: conf}));

rst.getPrimary();
expectState(rst, ReplSetTest.State.PRIMARY);
assert.throws(function() {
                  rst.restart(0, {configsvr: ""});
              });

rst.stopSet();
})();

(function() {
// Test that a set initialized with --configsvr but then restarted without --configsvr will fail to
// start up.
jsTestLog("set initiated with configsvr, restarted without --configsvr cmd line");
var rst = new ReplSetTest({name: "configrs8",
                           nodes: 1,
                           nodeOptions: {configsvr: "",
                                         journal: "",
                                         storageEngine: "wiredTiger"}});

rst.startSet();
var conf = rst.getReplSetConfig();
conf.configsvr = true;
assert.commandWorked(rst.nodes[0].adminCommand({replSetInitiate: conf}));

rst.getPrimary();
expectState(rst, ReplSetTest.State.PRIMARY);

var node = rst.nodes[0];
var options = node.savedOptions;
delete options.configsvr;
options.noCleanData = true;

MongoRunner.stopMongod(node);
var conn = MongoRunner.runMongod(options);
assert.eq(null, conn, "Mongod should have failed to start, but didn't");

rst.stopSet();
})();

})();