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/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* 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.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
package org.opensearch.cluster.node;
import org.opensearch.common.Nullable;
import org.opensearch.common.Strings;
import org.opensearch.common.network.InetAddresses;
import org.opensearch.common.network.NetworkAddress;
import org.opensearch.common.regex.Regex;
import org.opensearch.common.settings.Settings;
import org.opensearch.common.transport.TransportAddress;
import java.util.HashMap;
import java.util.Map;
import java.util.function.BiConsumer;
import java.util.stream.Collectors;
public class DiscoveryNodeFilters {
public enum OpType {
AND,
OR
}
/**
* Validates the IP addresses in a group of {@link Settings} by looking for the keys
* "_ip", "_host_ip", and "_publish_ip" and ensuring each of their comma separated values
* that has no wildcards is a valid IP address.
*/
public static final BiConsumer IP_VALIDATOR = (propertyKey, rawValue) -> {
if (rawValue != null) {
if (propertyKey.endsWith("._ip") || propertyKey.endsWith("._host_ip") || propertyKey.endsWith("_publish_ip")) {
for (String value : Strings.tokenizeToStringArray(rawValue, ",")) {
if (Regex.isSimpleMatchPattern(value) == false && InetAddresses.isInetAddress(value) == false) {
throw new IllegalArgumentException("invalid IP address [" + value + "] for [" + propertyKey + "]");
}
}
}
}
};
/**
* Creates or updates filters returning a new {@link DiscoveryNodeFilters} object.
* If the new object has no filters, {@code null} is returned.
*/
@Nullable
public static DiscoveryNodeFilters buildOrUpdateFromKeyValue(
final DiscoveryNodeFilters original,
final OpType opType,
final Map filters
) {
final DiscoveryNodeFilters updated;
if (original == null) {
updated = new DiscoveryNodeFilters(opType, new HashMap<>());
} else {
assert opType == original.opType : "operation type should match with node filter parameter";
updated = new DiscoveryNodeFilters(original.opType, original.filters);
}
for (Map.Entry entry : filters.entrySet()) {
String[] values = Strings.tokenizeToStringArray(entry.getValue(), ",");
updated.filters.compute(entry.getKey(), (k, v) -> values.length > 0 ? values : null);
}
if (updated.filters.isEmpty()) {
return null;
}
return updated;
}
private final Map filters;
private final OpType opType;
DiscoveryNodeFilters(OpType opType, Map filters) {
this.opType = opType;
this.filters = filters;
}
private boolean matchByIP(String[] values, @Nullable String hostIp, @Nullable String publishIp) {
for (String value : values) {
boolean matchIp = Regex.simpleMatch(value, hostIp) || Regex.simpleMatch(value, publishIp);
if (matchIp) {
return matchIp;
}
}
return false;
}
/**
* Removes any filters that should not be considered, returning a new
* {@link DiscoveryNodeFilters} object. If the filtered object has no
* filters after trimming, {@code null} is returned.
*/
@Nullable
public static DiscoveryNodeFilters trimTier(@Nullable DiscoveryNodeFilters original) {
if (original == null) {
return null;
}
Map newFilters = original.filters.entrySet()
.stream()
// Remove all entries that start with "_tier", as these will be handled elsewhere
.filter(entry -> {
String attr = entry.getKey();
return attr != null && attr.startsWith("_tier") == false;
})
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
if (newFilters.size() == 0) {
return null;
} else {
return new DiscoveryNodeFilters(original.opType, newFilters);
}
}
public boolean match(DiscoveryNode node) {
for (Map.Entry entry : filters.entrySet()) {
String attr = entry.getKey();
String[] values = entry.getValue();
if ("_ip".equals(attr)) {
// We check both the host_ip or the publish_ip
String publishAddress = null;
if (node.getAddress() instanceof TransportAddress) {
publishAddress = NetworkAddress.format(node.getAddress().address().getAddress());
}
boolean match = matchByIP(values, node.getHostAddress(), publishAddress);
if (opType == OpType.AND) {
if (match) {
// If we match, we can check to the next filter
continue;
}
return false;
}
if (match && opType == OpType.OR) {
return true;
}
} else if ("_host_ip".equals(attr)) {
// We check explicitly only the host_ip
boolean match = matchByIP(values, node.getHostAddress(), null);
if (opType == OpType.AND) {
if (match) {
// If we match, we can check to the next filter
continue;
}
return false;
}
if (match && opType == OpType.OR) {
return true;
}
} else if ("_publish_ip".equals(attr)) {
// We check explicitly only the publish_ip
String address = null;
if (node.getAddress() instanceof TransportAddress) {
address = NetworkAddress.format(node.getAddress().address().getAddress());
}
boolean match = matchByIP(values, address, null);
if (opType == OpType.AND) {
if (match) {
// If we match, we can check to the next filter
continue;
}
return false;
}
if (match && opType == OpType.OR) {
return true;
}
} else if ("_host".equals(attr)) {
for (String value : values) {
if (Regex.simpleMatch(value, node.getHostName()) || Regex.simpleMatch(value, node.getHostAddress())) {
if (opType == OpType.OR) {
return true;
}
} else {
if (opType == OpType.AND) {
return false;
}
}
}
} else if ("_id".equals(attr)) {
for (String value : values) {
if (node.getId().equals(value)) {
if (opType == OpType.OR) {
return true;
}
} else {
if (opType == OpType.AND) {
return false;
}
}
}
} else if ("_name".equals(attr) || "name".equals(attr)) {
for (String value : values) {
if (Regex.simpleMatch(value, node.getName())) {
if (opType == OpType.OR) {
return true;
}
} else {
if (opType == OpType.AND) {
return false;
}
}
}
} else {
String nodeAttributeValue = node.getAttributes().get(attr);
if (nodeAttributeValue == null) {
if (opType == OpType.AND) {
return false;
} else {
continue;
}
}
for (String value : values) {
if (Regex.simpleMatch(value, nodeAttributeValue)) {
if (opType == OpType.OR) {
return true;
}
} else {
if (opType == OpType.AND) {
return false;
}
}
}
}
}
if (opType == OpType.OR) {
return false;
} else {
return true;
}
}
/**
* Generates a human-readable string for the DiscoverNodeFilters.
* Example: {@code _id:"id1 OR blah",name:"blah OR name2"}
*/
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
int entryCount = filters.size();
for (Map.Entry entry : filters.entrySet()) {
String attr = entry.getKey();
String[] values = entry.getValue();
sb.append(attr);
sb.append(":\"");
int valueCount = values.length;
for (String value : values) {
sb.append(value);
if (valueCount > 1) {
sb.append(" ").append(opType.toString()).append(" ");
}
valueCount--;
}
sb.append("\"");
if (entryCount > 1) {
sb.append(",");
}
entryCount--;
}
return sb.toString();
}
}
