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|
/* test removing a node from a replica set
*
* Start set with three nodes
* Initial sync
* Remove slave1
* Remove slave2
* Bring slave1 back up
* Bring slave2 back up
* Add them back as slave
* Make sure everyone's secondary
*/
load("jstests/replsets/rslib.js");
var name = "removeNodes";
var host = getHostName();
print("Start set with three nodes");
var replTest = new ReplSetTest( {name: name, nodes: 3} );
var nodes = replTest.startSet();
replTest.initiate();
var master = replTest.getMaster();
print("Initial sync");
master.getDB("foo").bar.baz.insert({x:1});
replTest.awaitReplication();
print("Remove slave2");
var config = replTest.getReplSetConfig();
config.members.pop();
config.version = 2;
try {
master.getDB("admin").runCommand({replSetReconfig:config});
}
catch(e) {
print(e);
}
reconnect(master);
print("Remove slave1");
config.members.pop();
config.version = 3;
try {
master.getDB("admin").runCommand({replSetReconfig:config});
}
catch(e) {
print(e);
}
reconnect(master);
print("sleeping 1");
sleep(10000);
// these are already down, but this clears their ports from memory so that they
// can be restarted later
stopMongod(replTest.getPort(1));
stopMongod(replTest.getPort(2));
print("Bring slave1 back up");
var paths = [ replTest.getPath(1), replTest.getPath(2) ];
var ports = allocatePorts(2, replTest.getPort(2)+1);
var args = ["mongod", "--port", ports[0], "--dbpath", paths[0], "--noprealloc", "--smallfiles", "--rest"];
var conn = startMongoProgram.apply( null, args );
conn.getDB("local").system.replset.remove();
printjson(conn.getDB("local").runCommand({getlasterror:1}));
print(conn);
print("sleeping 2");
sleep(10000);
stopMongod(ports[0]);
replTest.restart(1);
print("Bring slave2 back up");
args[2] = ports[1];
args[4] = paths[1];
conn = startMongoProgram.apply( null, args );
conn.getDB("local").system.replset.remove();
print("path: "+paths[1]);
print("sleeping 3");
sleep(10000);
stopMongod(ports[1]);
replTest.restart(2);
sleep(10000);
print("Add them back as slaves");
config.members.push({_id:1, host : host+":"+replTest.getPort(1)});
config.members.push({_id:2, host : host+":"+replTest.getPort(2)});
config.version = 4;
wait(function() {
try {
master.getDB("admin").runCommand({replSetReconfig:config});
}
catch(e) {
print(e);
}
reconnect(master);
master.setSlaveOk();
var newConfig = master.getDB("local").system.replset.findOne();
return newConfig.version == 4;
});
print("Make sure everyone's secondary");
wait(function() {
var status = master.getDB("admin").runCommand({replSetGetStatus:1});
occasionally(function() {
printjson(status);
});
if (!status.members || status.members.length != 3) {
return false;
}
for (var i = 0; i<3; i++) {
if (status.members[i].state != 1 && status.members[i].state != 2) {
return false;
}
}
return true;
});
replTest.stopSet();
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