Clickhouse-copier DB::Exception: Requested cluster 'xxx' not found - apache-zookeeper

Question

I'm testing Clickhouse-copier for copying data from one cluster to another.
I set up one-node one-replica cluster called xxx.
SELECT *
FROM system.clusters
┌─cluster─┬─shard_num─┬─shard_weight─┬─replica_num─┬─host_name─
│ xxx │ 1 │ 1 │ 1 │ 127.0.0.1
└─────────┴───────────┴──────────────┴─────────────┴───────────
┬─host_address─┬─port─┬─is_local─┬─user────┬─default_database─┐
│ 127.0.0.1 │ 9000 │ 1 │ default │ │
┴──────────────┴──────┴──────────┴─────────┴──────────────────┘
I also created database on this cluster cluster_xxx and two tables local_data and dist_data.
CREATE TABLE cluster_xxx.local_data on cluster xxx (
`countryName` String,
`countryCode` String,
`indicatorName` String,
`indicatorCode` String
) ENGINE = MergeTree()
ORDER BY countryName
SETTINGS index_granularity = 8192
CREATE TABLE cluster_xxx.dist_data on cluster xxx
(`countryName` String,
`countryCode` String,
`indicatorName` String,
`indicatorCode` String
) ENGINE = Distributed(xxx, cluster_xxx, local_data)
Then I prepared two config files for Clickhouse-copier
zookeeper.zml:
<yandex>
<logger>
<level>trace</level>
<size>100M</size>
<count>3</count>
</logger>
<zookeeper>
<node>
<host>localhost</host>
<port>2181</port>
</node>
</zookeeper>
</yandex>
and schema.xml
<yandex>
<remote_servers>
<source_cluster>
<shard>
<replica>
<host>127.0.0.1</host>
<port>9000</port>
</replica>
</shard>
</source_cluster>
<target_cluster>
<shard>
<replica>
<host>192.168.0.110</host>
<port>9000</port>
</replica>
</shard>
</target_cluster>
</remote_servers>
<max_workers>1</max_workers>
<tables>
<table_events>
<cluster_pull>xxx</cluster_pull>
<database_pull>cluster_xxx</database_pull>
<table_pull>dist_data</table_pull>
<cluster_push>test_cluster</cluster_push>
<database_push>cluster_test</database_push>
<table_push>dist_data</table_push>
<engine>ENGINE=MergeTree('/clickhouse/tables/test_cluster/cluster_test/dist_data',
'{replica}')</engine>
<sharding_key>rand()</sharding_key>
</table_events>
</tables>
</yandex>
which I put to Zookeeper zookeeper-client create /clickhouse/description "$(cat schema.xml)"
When I run clickhouse-copier --config-file=zookeeper.zml --task-path=/clickhouse exception is thrown
2019.06.12 23:06:06.668703 [ 1 ] {} <Error> : virtual int
DB::ClusterCopierApp::main(const std::vector<std::basic_string<char> >&): Code: 170, e.displayText() =
DB::Exception: Requested cluster 'xxx' not found, Stack trace:
0. clickhouse-copier(StackTrace::StackTrace()+0x16) [0x6834a66]
1. clickhouse-copier(DB::Exception::Exception(std::string const&, int)+0x1f) [0x317311f]
2. clickhouse-copier(DB::Context::getCluster(std::string const&) const+0x7f) [0x5e6115f]
3. clickhouse-copier(DB::ClusterCopier::init()+0x1181) [0x3213b51]
4. clickhouse-copier(DB::ClusterCopierApp::mainImpl()+0x5dd) [0x320383d]
5. clickhouse-copier(DB::ClusterCopierApp::main(std::vector<std::string, std::allocator<std::string> > const&)+0x1a) [0x315619a]
6. clickhouse-copier(Poco::Util::Application::run()+0x26) [0x6a84ec6]
7. clickhouse-copier(Poco::Util::ServerApplication::run(int, char**)+0x136) [0x6a9f076]
8. clickhouse-copier(mainEntryClickHouseClusterCopier(int, char**)+0x9a) [0x32001aa]
9. clickhouse-copier(main+0x179) [0x314e609]
10. /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f345138a3d5]
11. clickhouse-copier() [0x316fd37]
What might be the reason that Clickhouse-copier doesn't see my cluster? Which point in configuration process do I miss?
Additional information:
I run Clickhouse-copier on source machine.
Source and destination machines are vms and run on Centos 7
Cluster on the destination server is not set up, because there was no need for it, the error regards source cluster
Firewall is turned off.

Answer 1

It looks like the error in schema.xml: source_cluster and target_cluster tags under remote_servers should be named as names of clusters.
You need to replace source_cluster with xxx and target_cluster with test_cluster.
schema.xml:
<yandex>
<remote_servers>
<xxx> <!-- ← ← ← -->
<shard>
<replica>
<host>127.0.0.1</host>
<port>9000</port>
</replica>
</shard>
</xxx>
<test_cluster> <!-- ← ← ← -->
<shard>
<replica>
<host>192.168.0.110</host>
<port>9000</port>
</replica>
</shard>
</test_cluster>
</remote_servers>
<max_workers>1</max_workers>
<tables>
<table_events>
<cluster_pull>xxx</cluster_pull>
<database_pull>cluster_xxx</database_pull>
<table_pull>dist_data</table_pull>
<cluster_push>test_cluster</cluster_push>
<database_push>cluster_test</database_push>
<table_push>dist_data</table_push>
<engine>ENGINE=MergeTree('/clickhouse/tables/test_cluster/cluster_test/dist_data', '{replica}')</engine>
<sharding_key>rand()</sharding_key>
</table_events>
</tables>
</yandex>