add support for jaeger tracing (#229)

demos/shared/signoz/keeper_config.xml

@@ -0,0 +1,64 @@
+<clickhouse>
+    <logger>
+        <!-- Possible levels [1]:
+
+          - none (turns off logging)
+          - fatal
+          - critical
+          - error
+          - warning
+          - notice
+          - information
+          - debug
+          - trace
+
+            [1]: https://github.com/pocoproject/poco/blob/poco-1.9.4-release/Foundation/include/Poco/Logger.h#L105-L114
+        -->
+        <level>information</level>
+        <log>/var/log/clickhouse-keeper/clickhouse-keeper.log</log>
+        <errorlog>/var/log/clickhouse-keeper/clickhouse-keeper.err.log</errorlog>
+        <!-- Rotation policy
+             See https://github.com/pocoproject/poco/blob/poco-1.9.4-release/Foundation/include/Poco/FileChannel.h#L54-L85
+          -->
+        <size>1000M</size>
+        <count>10</count>
+        <!-- <console>1</console> --> <!-- Default behavior is autodetection (log to console if not daemon mode and is tty) -->
+    </logger>
+
+    <listen_host>0.0.0.0</listen_host>
+    <max_connections>4096</max_connections>
+
+    <keeper_server>
+            <tcp_port>9181</tcp_port>
+
+            <!-- Must be unique among all keeper serves -->
+            <server_id>1</server_id>
+
+            <log_storage_path>/var/lib/clickhouse/coordination/logs</log_storage_path>
+            <snapshot_storage_path>/var/lib/clickhouse/coordination/snapshots</snapshot_storage_path>
+
+            <coordination_settings>
+                <operation_timeout_ms>10000</operation_timeout_ms>
+                <min_session_timeout_ms>10000</min_session_timeout_ms>
+                <session_timeout_ms>100000</session_timeout_ms>
+                <raft_logs_level>information</raft_logs_level>
+                <compress_logs>false</compress_logs>
+                <!-- All settings listed in https://github.com/ClickHouse/ClickHouse/blob/master/src/Coordination/CoordinationSettings.h -->
+            </coordination_settings>
+
+            <!-- enable sanity hostname checks for cluster configuration (e.g. if localhost is used with remote endpoints) -->
+            <hostname_checks_enabled>true</hostname_checks_enabled>
+            <raft_configuration>
+                <server>
+                    <id>1</id>
+
+                    <!-- Internal port and hostname -->
+                    <hostname>clickhouses-keeper-1</hostname>
+                    <port>9234</port>
+                </server>
+
+                <!-- Add more servers here -->
+
+            </raft_configuration>
+    </keeper_server>
+</clickhouse>