Add clickhouse starter package.

orion-server/src/main/java/com/pinterest/orion/core/clickhouse/ClickHouseCluster.java

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+package com.pinterest.orion.core.clickhouse;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.logging.Logger;
+
+import com.pinterest.orion.common.NodeInfo;
+import com.pinterest.orion.core.Cluster;
+import com.pinterest.orion.core.ClusterStateSink;
+import com.pinterest.orion.core.CostCalculator;
+import com.pinterest.orion.core.Node;
+import com.pinterest.orion.core.PluginConfigurationException;
+import com.pinterest.orion.core.Utilization;
+import com.pinterest.orion.core.actions.ActionFactory;
+import com.pinterest.orion.core.actions.alert.AlertFactory;
+import com.pinterest.orion.core.actions.audit.ActionAuditor;
+import com.pinterest.orion.core.automation.operator.Operator;
+import com.pinterest.orion.core.automation.sensor.Sensor;
+
+public class ClickHouseCluster extends Cluster {
+
+  private static final long serialVersionUID = 1L;
+  private static final Logger logger = Logger.getLogger(ClickHouseNode.class.getName());
+  public static final String CLUSTER_REGION = "region";
+  public static final String DEFAULT_REGION = "us-east-1";
+  private Map<String, Object> config;
+
+  public ClickHouseCluster(String id,
+                           String name,
+                           List<Sensor> monitors,
+                           List<Operator> operators,
+                           ActionFactory actionFactory,
+                           AlertFactory alertFactory,
+                           ActionAuditor auditSink,
+                           ClusterStateSink stateSink,
+                           CostCalculator costCalculator) {
+    super(id, name, "ClickHouse", monitors, operators, actionFactory, alertFactory, auditSink, stateSink,
+        costCalculator);
+  }
+
+  @Override
+  protected void bootstrapClusterInfo(Map<String, Object> config) throws PluginConfigurationException {
+    this.config = config;
+    setAttribute(CLUSTER_REGION, config.getOrDefault(CLUSTER_REGION, DEFAULT_REGION));
+  }
+
+  @Override
+  protected Node getNodeInstance(NodeInfo info) {
+    return new ClickHouseNode(this, info, new Properties());
+  }
+
+  @Override
+  public void addNodeWithoutAgent(NodeInfo info) {
+    getNodeMap().put(info.getNodeId(), getNodeInstance(info));
+  }
+
+  @Override
+  public Logger logger() {
+    return logger;
+  }
+
+  public Map<String, Object> getConfig() {
+    return config;
+  }
+
+  @Override
+  public Map<String, Utilization> getUtilizationMap() {
+    return new HashMap<>();
+  }
+
+}

orion-server/src/main/java/com/pinterest/orion/core/clickhouse/ClickHouseNode.java

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+package com.pinterest.orion.core.clickhouse;
+
+import java.util.Properties;
+
+import com.pinterest.orion.common.NodeInfo;
+import com.pinterest.orion.core.Cluster;
+import com.pinterest.orion.core.Node;
+
+public class ClickHouseNode extends Node {
+
+  private static final long serialVersionUID = 1L;
+
+  public ClickHouseNode(Cluster cluster, NodeInfo currentNodeInfo, Properties connectionProps) {
+    super(cluster, currentNodeInfo, connectionProps);
+  }
+
+}