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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
* Modifications copyright (c) 2018 Nokia
* ================================================================================
*/
package org.openecomp.sdc.be.components.impl;
import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.KeyspaceMetadata;
import com.datastax.driver.core.Metadata;
import com.datastax.driver.core.Session;
import org.openecomp.sdc.be.config.ConfigurationManager;
import org.openecomp.sdc.be.dao.cassandra.schema.SdcSchemaUtils;
import org.openecomp.sdc.be.dao.cassandra.schema.Table;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.openecomp.sdc.common.util.GeneralUtility;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.*;
@Component("cassandra-health-check")
public class CassandraHealthCheck {
private static final Logger log = Logger.getLogger(CassandraHealthCheck.class.getName());
private String localDataCenterName = null;
private Set<String> sdcKeyspaces = new HashSet<>();
private int HC_FormulaNumber;
private SdcSchemaUtils sdcSchemaUtils;
@PostConstruct
private void init() {
//Initialize local data center name - this field must be filled by DevOps
localDataCenterName = ConfigurationManager.getConfigurationManager().getConfiguration().getCassandraConfig().getLocalDataCenter();
if (GeneralUtility.isEmptyString(localDataCenterName)) {
log.error("localDataCenter Name in configuration.yaml is missing.");
return;
}
//Collect all SDC keyspaces
for (Table table : Table.values()) {
sdcKeyspaces.add(table.getTableDescription().getKeyspace());
}
String janusGraphCfgFile = ConfigurationManager.getConfigurationManager()
.getConfiguration().getJanusGraphCfgFile();
Properties prop = new Properties();
InputStream janusGraphProp = null;
try {
//load a properties file
janusGraphProp = new FileInputStream(janusGraphCfgFile);
prop.load(janusGraphProp);
//Add janusgraph keyspace
String janusGraphKeyspace = prop.getProperty("storage.cassandra.keyspace");
if (!GeneralUtility.isEmptyString(janusGraphKeyspace)) {
sdcKeyspaces.add(janusGraphKeyspace);
}
} catch (Exception e) {
log.error("Failed to open titen.properties file , url is : {}", janusGraphCfgFile, e);
}
log.info("All sdc keyspaces are : {}", sdcKeyspaces);
sdcSchemaUtils = new SdcSchemaUtils();
//Calculate the Formula of Health Check
Cluster cluster = null;
try {
log.info("creating cluster for Cassandra Health Check.");
//Create cluster from nodes in cassandra configuration
cluster = sdcSchemaUtils.createCluster();
if (cluster == null) {
log.error("Failure create cassandra cluster.");
return;
}
Metadata metadata = cluster.getMetadata();
if (metadata == null) {
log.error("Failure get cassandra metadata.");
return;
}
log.info("Cluster Metadata: {}", metadata);
List<KeyspaceMetadata> keyspaces = metadata.getKeyspaces();
List<Integer> replactionFactorList = new ArrayList<>();
//Collect the keyspaces Replication Factor of current localDataCenter
for (KeyspaceMetadata keyspace : keyspaces) {
if (sdcKeyspaces.contains(keyspace.getName())) {
log.info("keyspace : {} , replication: {}", keyspace.getName(), keyspace.getReplication());
Map<String, String> replicationOptions = keyspace.getReplication();
//In 1 site with one data center
if (replicationOptions.containsKey("replication_factor")) {
replactionFactorList.add(Integer.parseInt(replicationOptions.get("replication_factor")));
}
//In multiple sites with some data center
else if (replicationOptions.containsKey(localDataCenterName)) {
replactionFactorList.add(Integer.parseInt(replicationOptions.get(localDataCenterName)));
}
}
}
if (replactionFactorList.size() == 0) {
log.error("Replication factor NOT found in all keyspaces");
return;
}
int maxReplicationFactor = Collections.max(replactionFactorList);
log.info("maxReplication Factor is: {}", maxReplicationFactor);
int localQuorum = maxReplicationFactor/2 + 1;
log.info("localQuorum is: {}", localQuorum);
HC_FormulaNumber = maxReplicationFactor - localQuorum;
log.info("Health Check formula : Replication Factor – Local_Quorum = {}", HC_FormulaNumber);
} catch (Exception e) {
log.error("create cassandra cluster failed with exception.", e);
} finally {
if (cluster != null) {
cluster.close();
}
}
}
public boolean getCassandraStatus() {
if (GeneralUtility.isEmptyString(localDataCenterName)) {
log.error("localDataCenter Name in configuration.yaml is missing.");
return false;
}
Cluster cluster = null;
Session session = null;
try {
log.info("creating cluster for Cassandra for monitoring.");
cluster = sdcSchemaUtils.createCluster();
if (cluster == null) {
log.error("Failure create cassandra cluster.");
return false;
}
session = cluster.connect();
Metadata metadata = cluster.getMetadata();
if (metadata == null) {
log.error("Failure get cassandra metadata.");
return false;
}
log.info("The number of cassandra nodes is:{}", metadata.getAllHosts().size());
//Count the number of data center nodes that are down
Long downHostsNumber = metadata.getAllHosts().stream()
.filter(x -> x.getDatacenter().equals(localDataCenterName) && !x.isUp()).count();
log.info("The cassandra down nodes number is {}", downHostsNumber);
return HC_FormulaNumber >= downHostsNumber;
} catch (Exception e) {
log.error("create cassandra cluster failed with exception.", e);
return false;
} finally {
if (session != null) {
session.close();
}
if (cluster != null) {
cluster.close();
}
}
}
}
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