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* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
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package org.elasticsearch.rest.action.cat;
import com.carrotsearch.hppc.ObjectIntOpenHashMap;
import org.elasticsearch.action.admin.cluster.node.stats.NodeStats;
import org.elasticsearch.action.admin.cluster.node.stats.NodesStatsRequest;
import org.elasticsearch.action.admin.cluster.node.stats.NodesStatsResponse;
import org.elasticsearch.action.admin.cluster.state.ClusterStateRequest;
import org.elasticsearch.action.admin.cluster.state.ClusterStateResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.Table;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.rest.*;
import org.elasticsearch.rest.action.support.RestActionListener;
import org.elasticsearch.rest.action.support.RestResponseListener;
import org.elasticsearch.rest.action.support.RestTable;
import static org.elasticsearch.rest.RestRequest.Method.GET;
public class RestAllocationAction extends AbstractCatAction {
@Inject
public RestAllocationAction(Settings settings, RestController controller, Client client) {
super(settings, controller, client);
controller.registerHandler(GET, "/_cat/allocation", this);
controller.registerHandler(GET, "/_cat/allocation/{nodes}", this);
}
@Override
void documentation(StringBuilder sb) {
sb.append("/_cat/allocation\n");
}
@Override
public void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
final String[] nodes = Strings.splitStringByCommaToArray(request.param("nodes"));
final ClusterStateRequest clusterStateRequest = new ClusterStateRequest();
clusterStateRequest.clear().routingTable(true);
clusterStateRequest.local(request.paramAsBoolean("local", clusterStateRequest.local()));
clusterStateRequest.masterNodeTimeout(request.paramAsTime("master_timeout", clusterStateRequest.masterNodeTimeout()));
client.admin().cluster().state(clusterStateRequest, new RestActionListener<ClusterStateResponse>(channel) {
@Override
public void processResponse(final ClusterStateResponse state) {
NodesStatsRequest statsRequest = new NodesStatsRequest(nodes);
statsRequest.clear().fs(true);
client.admin().cluster().nodesStats(statsRequest, new RestResponseListener<NodesStatsResponse>(channel) {
@Override
public RestResponse buildResponse(NodesStatsResponse stats) throws Exception {
Table tab = buildTable(request, state, stats);
return RestTable.buildResponse(tab, channel);
}
});
}
});
}
@Override
Table getTableWithHeader(final RestRequest request) {
final Table table = new Table();
table.startHeaders();
table.addCell("shards", "alias:s;text-align:right;desc:number of shards on node");
table.addCell("disk.used", "alias:du,diskUsed;text-align:right;desc:disk used (total, not just ES)");
table.addCell("disk.avail", "alias:da,diskAvail;text-align:right;desc:disk available");
table.addCell("disk.total", "alias:dt,diskTotal;text-align:right;desc:total capacity of all volumes");
table.addCell("disk.percent", "alias:dp,diskPercent;text-align:right;desc:percent disk used");
table.addCell("host", "alias:h;desc:host of node");
table.addCell("ip", "desc:ip of node");
table.addCell("node", "alias:n;desc:name of node");
table.endHeaders();
return table;
}
private Table buildTable(RestRequest request, final ClusterStateResponse state, final NodesStatsResponse stats) {
final ObjectIntOpenHashMap<String> allocs = new ObjectIntOpenHashMap<>();
for (ShardRouting shard : state.getState().routingTable().allShards()) {
String nodeId = "UNASSIGNED";
if (shard.assignedToNode()) {
nodeId = shard.currentNodeId();
}
allocs.addTo(nodeId, 1);
}
Table table = getTableWithHeader(request);
for (NodeStats nodeStats : stats.getNodes()) {
DiscoveryNode node = nodeStats.getNode();
int shardCount = 0;
if (allocs.containsKey(node.id())) {
shardCount = allocs.lget();
}
ByteSizeValue total = nodeStats.getFs().getTotal().getTotal();
ByteSizeValue avail = nodeStats.getFs().getTotal().getAvailable();
//if we don't know how much we use (non data nodes), it means 0
long used = 0;
short diskPercent = -1;
if (total.bytes() > 0) {
used = total.bytes() - avail.bytes();
if (used >= 0 && avail.bytes() >= 0) {
diskPercent = (short) (used * 100 / (used + avail.bytes()));
}
}
table.startRow();
table.addCell(shardCount);
table.addCell(used < 0 ? null : new ByteSizeValue(used));
table.addCell(avail.bytes() < 0 ? null : avail);
table.addCell(total.bytes() < 0 ? null : total);
table.addCell(diskPercent < 0 ? null : diskPercent);
table.addCell(node.getHostName());
table.addCell(node.getHostAddress());
table.addCell(node.name());
table.endRow();
}
if (allocs.containsKey("UNASSIGNED")) {
table.startRow();
table.addCell(allocs.lget());
table.addCell(null);
table.addCell(null);
table.addCell(null);
table.addCell(null);
table.addCell(null);
table.addCell(null);
table.addCell("UNASSIGNED");
table.endRow();
}
return table;
}
}