org.elasticsearch.rest.action.cat.RestAllocationAction Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.rest.action.cat;
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.action.admin.indices.stats.CommonStatsFlags;
import org.elasticsearch.client.internal.node.NodeClient;
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.unit.ByteSizeValue;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.action.RestActionListener;
import org.elasticsearch.rest.action.RestResponseListener;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static org.elasticsearch.rest.RestRequest.Method.GET;
public class RestAllocationAction extends AbstractCatAction {
@Override
public List routes() {
return List.of(new Route(GET, "/_cat/allocation"), new Route(GET, "/_cat/allocation/{nodes}"));
}
@Override
public String getName() {
return "cat_allocation_action";
}
@Override
protected void documentation(StringBuilder sb) {
sb.append("/_cat/allocation\n");
}
@Override
public RestChannelConsumer doCatRequest(final RestRequest request, final NodeClient client) {
final String[] nodes = Strings.splitStringByCommaToArray(request.param("nodes", "data:true"));
final ClusterStateRequest clusterStateRequest = new ClusterStateRequest();
clusterStateRequest.clear().routingTable(true);
clusterStateRequest.local(request.paramAsBoolean("local", clusterStateRequest.local()));
clusterStateRequest.masterNodeTimeout(request.paramAsTime("master_timeout", clusterStateRequest.masterNodeTimeout()));
return channel -> client.admin().cluster().state(clusterStateRequest, new RestActionListener(channel) {
@Override
public void processResponse(final ClusterStateResponse state) {
NodesStatsRequest statsRequest = new NodesStatsRequest(nodes);
statsRequest.clear()
.addMetric(NodesStatsRequest.Metric.FS.metricName())
.indices(new CommonStatsFlags(CommonStatsFlags.Flag.Store));
client.admin().cluster().nodesStats(statsRequest, new RestResponseListener(channel) {
@Override
public RestResponse buildResponse(NodesStatsResponse stats) throws Exception {
Table tab = buildTable(request, state, stats);
return RestTable.buildResponse(tab, channel);
}
});
}
});
}
@Override
protected 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.indices", "alias:di,diskIndices;text-align:right;desc:disk used by ES indices");
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 Map allocs = new HashMap<>();
for (ShardRouting shard : state.getState().routingTable().allShards()) {
String nodeId = "UNASSIGNED";
if (shard.assignedToNode()) {
nodeId = shard.currentNodeId();
}
allocs.merge(nodeId, 1, Integer::sum);
}
Table table = getTableWithHeader(request);
for (NodeStats nodeStats : stats.getNodes()) {
DiscoveryNode node = nodeStats.getNode();
int shardCount = allocs.getOrDefault(node.getId(), 0);
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.getBytes() > 0) {
used = total.getBytes() - avail.getBytes();
if (used >= 0 && avail.getBytes() >= 0) {
diskPercent = (short) (used * 100 / (used + avail.getBytes()));
}
}
table.startRow();
table.addCell(shardCount);
table.addCell(nodeStats.getIndices().getStore().getSize());
table.addCell(used < 0 ? null : new ByteSizeValue(used));
table.addCell(avail.getBytes() < 0 ? null : avail);
table.addCell(total.getBytes() < 0 ? null : total);
table.addCell(diskPercent < 0 ? null : diskPercent);
table.addCell(node.getHostName());
table.addCell(node.getHostAddress());
table.addCell(node.getName());
table.endRow();
}
final String UNASSIGNED = "UNASSIGNED";
if (allocs.containsKey(UNASSIGNED)) {
table.startRow();
table.addCell(allocs.get(UNASSIGNED));
table.addCell(null);
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;
}
}