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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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.
*/
package org.apache.cassandra.tools.nodetool;
import io.airlift.airline.Arguments;
import io.airlift.airline.Command;
import io.airlift.airline.Option;
import java.io.PrintStream;
import java.net.UnknownHostException;
import java.text.DecimalFormat;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import org.apache.cassandra.locator.EndpointSnitchInfoMBean;
import org.apache.cassandra.tools.NodeProbe;
import org.apache.cassandra.tools.NodeTool;
import org.apache.cassandra.tools.NodeTool.NodeToolCmd;
import org.apache.cassandra.tools.nodetool.formatter.TableBuilder;
import com.google.common.collect.ArrayListMultimap;
@SuppressWarnings("UseOfSystemOutOrSystemErr")
@Command(name = "status", description = "Print cluster information (state, load, IDs, ...)")
public class Status extends NodeToolCmd
{
@Arguments(usage = "[]", description = "The keyspace name")
private String keyspace = null;
@Option(title = "resolve_ip", name = {"-r", "--resolve-ip"}, description = "Show node domain names instead of IPs")
private boolean resolveIp = false;
private boolean isTokenPerNode = true;
private Collection joiningNodes, leavingNodes, movingNodes, liveNodes, unreachableNodes;
private Map loadMap, hostIDMap;
private EndpointSnitchInfoMBean epSnitchInfo;
@Override
public void execute(NodeProbe probe)
{
PrintStream out = probe.output().out;
joiningNodes = probe.getJoiningNodes(true);
leavingNodes = probe.getLeavingNodes(true);
movingNodes = probe.getMovingNodes(true);
loadMap = probe.getLoadMap(true);
Map tokensToEndpoints = probe.getTokenToEndpointMap(true);
liveNodes = probe.getLiveNodes(true);
unreachableNodes = probe.getUnreachableNodes(true);
hostIDMap = probe.getHostIdMap(true);
epSnitchInfo = probe.getEndpointSnitchInfoProxy();
StringBuilder errors = new StringBuilder();
TableBuilder.SharedTable sharedTable = new TableBuilder.SharedTable(" ");
Map ownerships = null;
boolean hasEffectiveOwns = false;
try
{
ownerships = probe.effectiveOwnershipWithPort(keyspace);
hasEffectiveOwns = true;
}
catch (IllegalStateException e)
{
ownerships = probe.getOwnershipWithPort();
errors.append("Note: ").append(e.getMessage()).append("%n");
}
catch (IllegalArgumentException ex)
{
out.printf("%nError: %s%n", ex.getMessage());
System.exit(1);
}
SortedMap dcs = NodeTool.getOwnershipByDcWithPort(probe, resolveIp, tokensToEndpoints, ownerships);
// More tokens than nodes (aka vnodes)?
if (dcs.size() < tokensToEndpoints.size())
isTokenPerNode = false;
// Datacenters
for (Map.Entry dc : dcs.entrySet())
{
TableBuilder tableBuilder = sharedTable.next();
addNodesHeader(hasEffectiveOwns, tableBuilder);
ArrayListMultimap hostToTokens = ArrayListMultimap.create();
for (HostStatWithPort stat : dc.getValue())
hostToTokens.put(stat.endpointWithPort.getHostAddressAndPort(), stat);
for (String endpoint : hostToTokens.keySet())
{
Float owns = ownerships.get(endpoint);
List tokens = hostToTokens.get(endpoint);
addNode(endpoint, owns, tokens.get(0), tokens.size(), hasEffectiveOwns, tableBuilder);
}
}
Iterator results = sharedTable.complete().iterator();
boolean first = true;
for (Map.Entry dc : dcs.entrySet())
{
if (!first) {
out.println();
}
first = false;
String dcHeader = String.format("Datacenter: %s%n", dc.getKey());
out.print(dcHeader);
for (int i = 0; i < (dcHeader.length() - 1); i++) out.print('=');
out.println();
// Legend
out.println("Status=Up/Down");
out.println("|/ State=Normal/Leaving/Joining/Moving");
TableBuilder dcTable = results.next();
dcTable.printTo(out);
}
out.printf("%n" + errors);
}
private void addNodesHeader(boolean hasEffectiveOwns, TableBuilder tableBuilder)
{
String owns = hasEffectiveOwns ? "Owns (effective)" : "Owns";
if (isTokenPerNode)
tableBuilder.add("--", "Address", "Load", owns, "Host ID", "Token", "Rack");
else
tableBuilder.add("--", "Address", "Load", "Tokens", owns, "Host ID", "Rack");
}
private void addNode(String endpoint, Float owns, HostStatWithPort hostStat, int size, boolean hasEffectiveOwns,
TableBuilder tableBuilder)
{
String status, state, load, strOwns, hostID, rack, epDns;
if (liveNodes.contains(endpoint)) status = "U";
else if (unreachableNodes.contains(endpoint)) status = "D";
else status = "?";
if (joiningNodes.contains(endpoint)) state = "J";
else if (leavingNodes.contains(endpoint)) state = "L";
else if (movingNodes.contains(endpoint)) state = "M";
else state = "N";
String statusAndState = status.concat(state);
load = loadMap.getOrDefault(endpoint, "?");
strOwns = owns != null && hasEffectiveOwns ? new DecimalFormat("##0.0%").format(owns) : "?";
hostID = hostIDMap.get(endpoint);
try
{
rack = epSnitchInfo.getRack(endpoint);
}
catch (UnknownHostException e)
{
throw new RuntimeException(e);
}
epDns = hostStat.ipOrDns(printPort);
if (isTokenPerNode)
{
tableBuilder.add(statusAndState, epDns, load, strOwns, hostID, hostStat.token, rack);
}
else
{
tableBuilder.add(statusAndState, epDns, load, String.valueOf(size), strOwns, hostID, rack);
}
}
}