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(function() {
'use strict';
function assertNoChunksOnConfig() {
assert.eq(0, config.chunks.count({"shard": "config"}));
}
// Database-level tests
{
var st = new ShardingTest({shards: 2});
var config = st.s.getDB('config');
var admin = st.s.getDB('admin');
// At first, there should not be an entry for config
assert.eq(0, config.databases.count({"_id": "config"}));
// Test that we can enable sharding on the config db
assert.commandWorked(admin.runCommand({enableSharding: 'config'}));
// We should never have a metadata doc for config, it is generated in-mem
assert.eq(0, config.databases.count({"_id": "config"}));
// Test that you cannot set the primary shard for config (not even to 'config')
assert.commandFailed(admin.runCommand({movePrimary: 'config', to: 'shard0000'}));
assert.commandFailed(admin.runCommand({movePrimary: 'config', to: 'config'}));
st.stop();
}
// Collection-level tests
{
var st = new ShardingTest({shards: 2});
var config = st.s.getDB('config');
var admin = st.s.getDB('admin');
// Test that we can shard an empty collection in the config db
assert.commandWorked(admin.runCommand({shardCollection: 'config.sharded', key: {_id: 1}}));
assertNoChunksOnConfig();
// Test that we cannot shard a collection in 'config' that holds data
assert.writeOK(config.withdata.insert({a: 1}));
assert.commandFailed(admin.runCommand({shardCollection: 'config.withdata', key: {_id: 1}}));
// Test that we cannot specify an initial number of chunks,
// because our shard key is not hashed.
assert.commandFailed(admin.runCommand(
{shardCollection: 'config.numchunks', key: {_id: 1}, numInitialChunks: 10}));
assertNoChunksOnConfig();
// Test that we cannot re-shard the same collection
assert.commandFailed(admin.runCommand({shardCollection: 'config.sharded', key: {a: 1}}));
assertNoChunksOnConfig();
// Test that we can drop a sharded collection in config
assert.commandWorked(admin.runCommand({shardCollection: 'config.todrop', key: {_id: 1}}));
config.todrop.insert({a: 1});
assertNoChunksOnConfig();
assert(config.todrop.drop());
assert.eq(0, config.chunks.count({"ns": "config.todrop"}));
assert.eq(0, config.todrop.count());
// Test that we can drop a non-sharded collection in config
config.newcoll.insert({a: 1});
assert(config.newcoll.drop());
assert.eq(0, config.newcoll.count());
assertNoChunksOnConfig();
st.stop();
}
// CRUD operations on sharded collections in config
{
var st = new ShardingTest({shards: 2});
var config = st.s.getDB('config');
var admin = st.s.getDB('admin');
assert.commandWorked(admin.runCommand({shardCollection: 'config.sharded', key: {_id: 1}}));
assertNoChunksOnConfig();
// Insertion and retrieval
assert.commandWorked(st.splitAt("config.sharded", {_id: 0}));
assert.commandWorked(
admin.runCommand({moveChunk: "config.sharded", find: {_id: -10}, to: "shard0000"}));
assert.commandWorked(
admin.runCommand({moveChunk: "config.sharded", find: {_id: 10}, to: "shard0001"}));
assert.writeOK(config.sharded.insert({_id: -10}));
assert.writeOK(config.sharded.insert({_id: 10}));
assert.eq({_id: -10}, config.sharded.findOne({_id: -10}));
assert.eq({_id: 10}, config.sharded.findOne({_id: 10}));
var shard0000 = st._connections[0].getDB("config");
var shard0001 = st._connections[1].getDB("config");
assert.eq({_id: -10}, shard0000.sharded.findOne());
assert.eq({_id: 10}, shard0001.sharded.findOne());
assert.eq(2, config.sharded.count());
for (var i = 0; i < 100; i++) {
assert.writeOK(config.sharded.insert({a: i}));
}
// Updates
assert.writeOK(config.sharded.update({_id: 10}, {$set: {a: 15}}));
assert.writeOK(config.sharded.update({_id: 10}, {$set: {a: 20}}));
// Deletes
assert.writeOK(config.sharded.remove({_id: 10}));
assert.writeOK(config.sharded.remove({a: {$gt: 50}}));
// Make an index
assert.commandWorked(config.sharded.createIndex({a: 1}));
st.stop();
}
// Chunk-level operations
{
var st = new ShardingTest({shards: 2});
var config = st.s.getDB('config');
var admin = st.s.getDB('admin');
assert.commandWorked(admin.runCommand({shardCollection: 'config.sharded', key: {_id: 1}}));
assertNoChunksOnConfig();
// Test that we can split chunks
assert.commandWorked(st.splitAt("config.sharded", {_id: 10}));
assert.commandWorked(st.splitAt("config.sharded", {_id: 100}));
assert.commandWorked(st.splitAt("config.sharded", {_id: 1000}));
assertNoChunksOnConfig();
// Try to move a chunk to config shard, should fail
assert.commandFailed(
admin.runCommand({moveChunk: "config.sharded", find: {_id: 40}, to: "config"}));
assertNoChunksOnConfig();
// Test that we can move chunks between two non-config shards
assert.commandWorked(
admin.runCommand({moveChunk: "config.sharded", find: {_id: 40}, to: "shard0001"}));
assert.commandWorked(
admin.runCommand({moveChunk: "config.sharded", find: {_id: 40}, to: "shard0000"}));
assertNoChunksOnConfig();
st.stop();
}
// When test commands are not enabled, only system.sessions may be sharded.
{
jsTest.setOption('enableTestCommands', false);
var st = new ShardingTest({shards: 2});
var admin = st.s.getDB('admin');
assert.commandWorked(
admin.runCommand({shardCollection: "config.system.sessions", key: {_id: 1}}));
assert.commandFailed(
admin.runCommand({shardCollection: "config.anythingelse", key: {_id: 1}}));
st.stop();
}
// Cannot shard things in config without shards.
{
var st = new ShardingTest({shards: 0});
var admin = st.s.getDB('admin');
assert.commandFailed(
admin.runCommand({shardCollection: "config.system.sessions", key: {_id: 1}}));
st.stop();
}
})();
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