#1397 feature: support for dns monitoring

collector/pom.xml

@@ -172,6 +172,13 @@
             <artifactId>rocketmq-tools</artifactId>
             <version>4.9.4</version>
         </dependency>
+
+        <!--dns-->
+        <dependency>
+            <groupId>dnsjava</groupId>
+            <artifactId>dnsjava</artifactId>
+            <version>3.5.2</version>
+        </dependency>
     </dependencies>
 
     <profiles>

collector/src/main/java/org/dromara/hertzbeat/collector/collect/dns/DnsCollectImpl.java

@@ -0,0 +1,210 @@
+package org.dromara.hertzbeat.collector.collect.dns;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.StringUtils;
+import org.dromara.hertzbeat.collector.collect.AbstractCollect;
+import org.dromara.hertzbeat.collector.dispatch.DispatchConstants;
+import org.dromara.hertzbeat.common.constants.CommonConstants;
+import org.dromara.hertzbeat.common.entity.job.Metrics;
+import org.dromara.hertzbeat.common.entity.job.protocol.DnsProtocol;
+import org.dromara.hertzbeat.common.entity.message.CollectRep;
+import org.dromara.hertzbeat.common.util.CommonUtil;
+import org.springframework.util.StopWatch;
+import org.xbill.DNS.DClass;
+import org.xbill.DNS.Message;
+import org.xbill.DNS.Name;
+import org.xbill.DNS.Opcode;
+import org.xbill.DNS.RRset;
+import org.xbill.DNS.Rcode;
+import org.xbill.DNS.Record;
+import org.xbill.DNS.Resolver;
+import org.xbill.DNS.Section;
+import org.xbill.DNS.SimpleResolver;
+import org.xbill.DNS.Type;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * dns protocol collection implementation
+ * @author Calvin
+ */
+@Slf4j
+public class DnsCollectImpl extends AbstractCollect {
+    /*
+     each part of dig command output
+     */
+    private static final String HEADER = "header";
+    private static final String QUESTION = "question";
+    private static final String ANSWER = "answer";
+    private static final String AUTHORITY = "authority";
+    private static final String ADDITIONAL = "additional";
+    /*
+     * used for header key
+     * example:
+     * ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3221
+     * ;; flags: qr rd ra ; qd: 1 an: 1 au: 0 ad: 0
+     *
+     *
+     * opcode -> opcode
+     * status -> status
+     * flags -> flags
+     * qd -> questionRowCount
+     * an -> answerRowCount
+     * au -> authorityRowCount
+     * ad -> additionalRowCount
+     */
+    private static final String RESPONSE_TIME = "responseTime";
+    private static final String OP_CODE = "opcode";
+    private static final String STATUS = "status";
+    private static final String FLAGS = "flags";
+    private static final String QUESTION_ROW_COUNT = "questionRowCount";
+    private static final String ANSWER_ROW_COUNT = "answerRowCount";
+    private static final String AUTHORITY_ROW_COUNT = "authorityRowCount";
+    private static final String ADDITIONAL_ROW_COUNT = "additionalRowCount";
+
+
+    @Override
+    public void collect(CollectRep.MetricsData.Builder builder, long monitorId, String app, Metrics metrics) {
+        // check params
+        if (checkDnsProtocolFailed(metrics.getDns())) {
+            builder.setCode(CollectRep.Code.FAIL);
+            builder.setMsg("DNS collect must have a valid DNS protocol param! ");
+            return;
+        }
+
+        DNSResolveResult dnsResolveResult;
+        try {
+            // run dig command
+            dnsResolveResult = dig(metrics.getDns());
+        } catch (IOException e) {
+            log.info(CommonUtil.getMessageFromThrowable(e));
+            builder.setCode(CollectRep.Code.UN_CONNECTABLE);
+            builder.setMsg(e.getMessage());
+            return;
+        } catch (Exception e) {
+            String errorMsg = CommonUtil.getMessageFromThrowable(e);
+            log.warn("[dns collect] error: {}", e.getMessage(), e);
+            builder.setCode(CollectRep.Code.FAIL);
+            builder.setMsg(errorMsg);
+            return;
+        }
+
+        // build dns metrics data
+        CollectRep.ValueRow.Builder valueRowBuilder = CollectRep.ValueRow.newBuilder();
+        if (StringUtils.equals(HEADER, metrics.getName())) {
+            // add header columns
+            Map<String, String> headerInfo = dnsResolveResult.getHeaderInfo();
+            metrics.getAliasFields().forEach(field -> valueRowBuilder.addColumns(headerInfo.getOrDefault(field, CommonConstants.NULL_VALUE)));
+        }else {
+            // add question/answer/authority/additional columns
+            List<String> currentMetricsResolveResultList = dnsResolveResult.getList(metrics.getName());
+            for (int index = 0; index < metrics.getAliasFields().size(); index++) {
+                valueRowBuilder.addColumns(index >= currentMetricsResolveResultList.size()
+                        ? CommonConstants.NULL_VALUE
+                        : currentMetricsResolveResultList.get(index));
+            }
+        }
+
+        builder.addValues(valueRowBuilder.build());
+    }
+
+    @Override
+    public String supportProtocol() {
+        return DispatchConstants.PROTOCOL_DNS;
+    }
+
+    private boolean checkDnsProtocolFailed(DnsProtocol dnsProtocol) {
+        return Objects.isNull(dnsProtocol) || dnsProtocol.isInvalid();
+    }
+
+    /**
+     * run dig command
+     */
+    private DNSResolveResult dig(DnsProtocol dns) throws IOException {
+        StopWatch responseTimeStopWatch = new StopWatch("responseTime");
+        responseTimeStopWatch.start();
+
+        Name name = Name.fromString(dns.getAddress(), Name.root);
+        Message query = Message.newQuery(Record.newRecord(name, Type.ANY, DClass.ANY));
+        Resolver res = new SimpleResolver(dns.getDnsServerIP());
+        res.setTimeout(Duration.of(Long.parseLong(dns.getTimeout()), ChronoUnit.MILLIS));
+        res.setTCP(Boolean.parseBoolean(dns.getTcp()));
+        res.setPort(Integer.parseInt(dns.getPort()));
+
+        Message response = res.send(query);
+        responseTimeStopWatch.stop();
+        return resolve(response, responseTimeStopWatch.getLastTaskTimeMillis());
+    }
+
+    private DNSResolveResult resolve(Message message, Long responseTime) {
+        return DNSResolveResult.builder()
+                .headerInfo(getHeaderInfo(message, responseTime))
+                .questionList(getSectionInfo(message, Section.QUESTION))
+                .answerList(getSectionInfo(message, Section.ANSWER))
+                .authorityList(getSectionInfo(message, Section.AUTHORITY))
+                .additionalList(getSectionInfo(message, Section.ADDITIONAL))
+                .build();
+    }
+
+    private Map<String, String> getHeaderInfo(Message message, Long responseTime) {
+        Map<String, String> resultMap = Maps.newHashMap();
+        resultMap.put(RESPONSE_TIME, String.valueOf(responseTime));
+        resultMap.put(OP_CODE, Opcode.string(message.getHeader().getOpcode()));
+        resultMap.put(STATUS, Rcode.string(message.getHeader().getRcode()));
+        resultMap.put(FLAGS, message.getHeader().printFlags());
+        resultMap.put(QUESTION_ROW_COUNT, String.valueOf(message.getHeader().getCount(Section.QUESTION)));
+        resultMap.put(ANSWER_ROW_COUNT, String.valueOf(message.getHeader().getCount(Section.ANSWER)));
+        resultMap.put(AUTHORITY_ROW_COUNT, String.valueOf(message.getHeader().getCount(Section.AUTHORITY)));
+        resultMap.put(ADDITIONAL_ROW_COUNT, String.valueOf(message.getHeader().getCount(Section.ADDITIONAL)));
+
+        return resultMap;
+    }
+
+    private List<String> getSectionInfo(Message message, int section) {
+        List<RRset> currentRRsetList = message.getSectionRRsets(section);
+        if (currentRRsetList == null || currentRRsetList.size() <= 0) {
+            return Lists.newArrayList();
+        }
+
+        List<String> infoList = Lists.newArrayListWithCapacity(currentRRsetList.size());
+        currentRRsetList.forEach(res -> infoList.add(res.toString()));
+
+        return infoList;
+    }
+
+
+    @Data
+    @Builder
+    @NoArgsConstructor
+    @AllArgsConstructor
+    private static class DNSResolveResult {
+        private Map<String, String> headerInfo;
+        /** example: www.google.com.		140	IN	A	192.133.77.133 **/
+        private List<String> questionList;
+        private List<String> answerList;
+        private List<String> authorityList;
+        private List<String> additionalList;
+
+        public List<String> getList(String metricsName) {
+            switch (metricsName) {
+                case QUESTION: return questionList;
+                case ANSWER: return answerList;
+                case AUTHORITY: return authorityList;
+                case ADDITIONAL: return additionalList;
+                default: return Collections.emptyList();
+            }
+        }
+    }
+}

collector/src/main/java/org/dromara/hertzbeat/collector/dispatch/DispatchConstants.java

@@ -95,7 +95,11 @@ public interface DispatchConstants {
      * protocol prometheus
      */
     String PROTOCOL_PROMETHEUS = "prometheus";
-
+    /**
+     * protocol dns
+     */
+    String PROTOCOL_DNS = "dns";
+
     // Protocol type related - end
     // 协议类型相关 - end //
 

collector/src/main/resources/META-INF/services/org.dromara.hertzbeat.collector.collect.AbstractCollect

@@ -15,3 +15,4 @@ org.dromara.hertzbeat.collector.collect.ftp.FtpCollectImpl
 org.dromara.hertzbeat.collector.collect.mq.RocketmqSingleCollectImpl
 org.dromara.hertzbeat.collector.collect.udp.UdpCollectImpl
 org.dromara.hertzbeat.collector.collect.push.PushCollectImpl
+org.dromara.hertzbeat.collector.collect.dns.DnsCollectImpl

collector/src/test/java/org/dromara/hertzbeat/collector/collect/dns/DnsCollectImplTest.java

@@ -0,0 +1,38 @@
+package org.dromara.hertzbeat.collector.collect.dns;
+
+
+import org.dromara.hertzbeat.common.entity.job.Metrics;
+import org.dromara.hertzbeat.common.entity.job.protocol.DnsProtocol;
+import org.dromara.hertzbeat.common.entity.message.CollectRep;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+
+/**
+ * Test case for {@link DnsCollectImpl}
+ * @author Calvin
+ */
+public class DnsCollectImplTest {
+    private DnsProtocol dnsProtocol;
+    private DnsCollectImpl dnsCollect;
+
+    @BeforeEach
+    public void setup() {
+        dnsCollect = new DnsCollectImpl();
+        dnsProtocol = DnsProtocol.builder()
+                .dnsServerIP("8.8.8.8")
+                .address("www.google.com")
+                .build();
+    }
+
+    @Test
+    public void testCollect() {
+        CollectRep.MetricsData.Builder builder = CollectRep.MetricsData.newBuilder();
+        long monitorId = 666;
+        String app = "testDNS";
+        Metrics metrics = new Metrics();
+        metrics.setDns(dnsProtocol);
+
+        dnsCollect.collect(builder, monitorId, app, metrics);
+    }
+}

common/src/main/java/org/dromara/hertzbeat/common/entity/job/Metrics.java

@@ -182,6 +182,10 @@ public class Metrics {
      * Monitoring configuration information using the public prometheus protocol
      */
     private PrometheusProtocol prometheus;
+    /**
+     * Monitoring configuration information using the public DNS protocol
+     */
+    private DnsProtocol dns;
 
     /**
      * collector use - Temporarily store subTask metrics response data

common/src/main/java/org/dromara/hertzbeat/common/entity/job/protocol/DnsProtocol.java

@@ -0,0 +1,26 @@
+package org.dromara.hertzbeat.common.entity.job.protocol;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ * @author Calvin
+ */
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class DnsProtocol {
+    private String dnsServerIP;
+    private String port;
+    private String address;
+    private String timeout;
+    private String tcp;
+
+    public boolean isInvalid() {
+        return StringUtils.isAnyBlank(dnsServerIP, port, address, timeout, tcp);
+    }
+}