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// Tests the state of sharding data after a replica set reconfig
//
// This test involves restarting a single-node replica set, so cannot be run on ephemeral storage
// engines. A single node replica set that is using an ephemeral engine will have no knowledge of
// the replica set configuration once restarted, so will not elect itself as primary.
// @tags: [requires_persistence]
(function() {
var st = new ShardingTest({ shards: 2,
mongos: 1,
other: {
rs: true,
rsOptions: { nodes : 1 }
}
});
var mongos = st.s0;
var admin = mongos.getDB("admin");
var shards = mongos.getCollection("config.shards").find().toArray();
var coll = mongos.getCollection("foo.bar");
var collSharded = mongos.getCollection("foo.barSharded");
assert.commandWorked(admin.runCommand({ enableSharding : coll.getDB() + "" }));
printjson(admin.runCommand({ movePrimary : coll.getDB() + "", to : shards[0]._id }));
assert.commandWorked(admin.runCommand({ shardCollection : collSharded.toString(),
key : { _id : 1 } }));
assert.commandWorked(admin.runCommand({ moveChunk : collSharded.toString(),
find : { _id : 0 },
to : shards[1]._id }));
assert.writeOK(coll.insert({ some : "data" }));
assert.writeOK(collSharded.insert({ some : "data" }));
assert.eq(2, mongos.adminCommand({ getShardVersion : collSharded.toString() }).version.t);
st.printShardingStatus();
// Restart both primaries to reset our sharding data
var restartPrimaries = function() {
var rs0Primary = st.rs0.getPrimary();
var rs1Primary = st.rs1.getPrimary();
st.rs0.stop(rs0Primary);
st.rs1.stop(rs1Primary);
ReplSetTest.awaitRSClientHosts(mongos, [rs0Primary, rs1Primary], { ok : false });
st.rs0.start(rs0Primary, { restart : true });
st.rs1.start(rs1Primary, { restart : true });
ReplSetTest.awaitRSClientHosts(mongos, [rs0Primary, rs1Primary], { ismaster : true });
};
restartPrimaries();
// Sharding data gets initialized either when shards are hit by an unsharded query or if some
// metadata operation was run before the step down, which wrote a minOpTime recovery record (CSRS
// only). In this case we did a moveChunk above from shard0 to shard1, so we will have this record
// on shard0.
if (st.configRS) {
assert.neq("",
st.rs0.getPrimary().adminCommand({ getShardVersion: coll.toString() }).configServer);
}
else {
assert.eq("",
st.rs0.getPrimary().adminCommand({ getShardVersion: coll.toString() }).configServer);
}
assert.eq("",
st.rs1.getPrimary().adminCommand({ getShardVersion : coll.toString() }).configServer);
// Doing a find only accesses the primary (rs0), which is already recovered. Ensure that the
// secondary still has no sharding knowledge.
assert.neq(null, coll.findOne({}));
assert.eq("",
st.rs1.getPrimary().adminCommand({ getShardVersion : coll.toString() }).configServer);
//
//
// Sharding data initialized when shards are hit by a sharded query
assert.neq(null, collSharded.findOne({}));
assert.neq("",
st.rs0.getPrimary().adminCommand({ getShardVersion : coll.toString() }).configServer);
assert.neq("",
st.rs1.getPrimary().adminCommand({ getShardVersion : coll.toString() }).configServer);
// Stepdown both primaries to reset our sharding data
var stepDownPrimaries = function() {
var rs0Primary = st.rs0.getPrimary();
var rs1Primary = st.rs1.getPrimary();
try {
rs0Primary.adminCommand({ replSetStepDown : 1000 * 1000, force : true });
assert(false);
}
catch(ex) {
// Expected connection exception, will check for stepdown later
}
try {
rs1Primary.adminCommand({ replSetStepDown : 1000 * 1000, force : true });
assert(false);
}
catch(ex) {
// Expected connection exception, will check for stepdown later
}
ReplSetTest.awaitRSClientHosts(mongos, [rs0Primary, rs1Primary], { secondary : true });
assert.commandWorked(new Mongo(rs0Primary.host).adminCommand({ replSetFreeze : 0 }));
assert.commandWorked(new Mongo(rs1Primary.host).adminCommand({ replSetFreeze : 0 }));
rs0Primary = st.rs0.getPrimary();
rs1Primary = st.rs1.getPrimary();
// Flush connections to avoid transient issues with conn pooling
assert.commandWorked(rs0Primary.adminCommand({ connPoolSync : true }));
assert.commandWorked(rs1Primary.adminCommand({ connPoolSync : true }));
ReplSetTest.awaitRSClientHosts(mongos, [rs0Primary, rs1Primary], { ismaster : true });
};
stepDownPrimaries();
//
//
// No sharding metadata until shards are hit by a metadata operation
assert.eq({},
st.rs0.getPrimary().adminCommand(
{ getShardVersion : collSharded.toString(), fullMetadata : true }).metadata);
assert.eq({},
st.rs1.getPrimary().adminCommand(
{ getShardVersion : collSharded.toString(), fullMetadata : true }).metadata);
//
//
// Metadata commands should enable sharding data implicitly
assert.commandWorked(mongos.adminCommand({ split : collSharded.toString(), middle : { _id : 0 }}));
assert.eq({},
st.rs0.getPrimary().adminCommand(
{ getShardVersion : collSharded.toString(), fullMetadata : true }).metadata);
assert.neq({},
st.rs1.getPrimary().adminCommand(
{ getShardVersion : collSharded.toString(), fullMetadata : true }).metadata);
//
//
// MoveChunk command should enable sharding data implicitly on TO-shard
assert.commandWorked(mongos.adminCommand({ moveChunk : collSharded.toString(), find : { _id : 0 },
to : shards[0]._id }));
assert.neq({},
st.rs0.getPrimary().adminCommand(
{ getShardVersion : collSharded.toString(), fullMetadata : true }).metadata);
assert.neq({},
st.rs1.getPrimary().adminCommand(
{ getShardVersion : collSharded.toString(), fullMetadata : true }).metadata);
jsTest.log( "DONE!" );
st.stop();
})();
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