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/*
* Test that replSetInitiate and replSetReconfig prohibit zero-vote arbiters,
* SERVER-13627.
*/
load('./jstests/multiVersion/libs/multi_rs.js');
var oldVersion = '2.6';
var newVersion = 'latest';
var NewReplicaSetConfigurationIncompatible = 103;
var InvalidReplicaSetConfig = 93;
/*
* Start 3 nodes running 'rsVersion', try to add a 0-vote arbiter at
* 'arbiterVersion' and return the replSetReconfig response.
*/
function addZeroVoteArbiter(rsVersion, arbiterVersion) {
var nodes = {
n1: {binVersion: rsVersion},
n2: {binVersion: rsVersion},
n3: {binVersion: rsVersion}};
var replTest = new ReplSetTest({nodes: nodes});
var conns = replTest.startSet();
replTest.initiate();
var arbiterConn = replTest.add({binVersion: arbiterVersion});
var admin = conns[0].getDB('admin');
var conf = replTest.conf();
jsTestLog('current config:');
printjson(conf);
conf.members.push({
_id: 3,
host: arbiterConn.host,
arbiterOnly: true,
votes: 0
});
conf.version++;
jsTestLog('Add arbiter with zero votes:');
var response = admin.runCommand({replSetReconfig: conf});
if (response.ok) {
// Old-version primary doesn't prohibit the reconfig, but the
// new-version arbiter removes itself when it sees it has 0 votes.
assert.soon(function () {
try {
var status = replTest.status();
printjson(status);
return (status.members.length == 4
&& status.members[3].state == replTest.DOWN
&& (/configuration is invalid/i).test(status.members[3].lastHeartbeatMessage));
} catch (exc) {
// Not ready.
print(exc);
return false;
}
});
// Primary stays up.
replTest.getPrimary();
}
replTest.stopSet();
return response;
}
(function newRSPlusOldArbiter() {
jsTestLog('New-version RS with 3 nodes, adding 0-vote arbiter is prohibited.');
var response = addZeroVoteArbiter(newVersion, oldVersion);
assert.commandFailed(response);
assert.eq(response.code, NewReplicaSetConfigurationIncompatible);
assert(/.*arbiter must vote.*/i.test(response.errmsg));
})();
(function oldRSPlusNewArbiter() {
jsTestLog('Old-version RS with 3 nodes, adding 0-vote arbiter is allowed.');
var response = addZeroVoteArbiter(oldVersion, newVersion);
/* Old version doesn't prohibit the reconfig. */
assert.commandWorked(response);
})();
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