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/*
* Copyright (c) 2016 Cisco and/or its affiliates.
*
* 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.
*/
/*
* Modifications copyright (c) 2018 AT&T Intellectual Property
*/
package org.onap.vnf.health.read;
import org.onap.vnf.health.CrudService;
import org.onap.vnf.health.RESTManager;
import org.onap.vnf.health.RESTManager.Pair;
import io.fd.honeycomb.translate.read.ReadContext;
import io.fd.honeycomb.translate.read.ReadFailedException;
import io.fd.honeycomb.translate.spi.read.Initialized;
import io.fd.honeycomb.translate.spi.read.InitializingReaderCustomizer;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import javax.annotation.Nonnull;
import org.onap.vnf.health.CrudService;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.health.vnf.onap.plugin.rev160918.HealthVnfOnapPluginStateBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.health.vnf.onap.plugin.rev160918.health.vnf.onap.plugin.params.HealthCheckBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.health.vnf.onap.plugin.rev160918.health.vnf.onap.plugin.params.health.check.FaultsBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.health.vnf.onap.plugin.rev160918.health.vnf.onap.plugin.params.health.check.faults.Fault;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.health.vnf.onap.plugin.rev160918.health.vnf.onap.plugin.params.health.check.faults.FaultBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.health.vnf.onap.plugin.rev160918.health.vnf.onap.plugin.params.health.check.faults.FaultKey;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.health.vnf.onap.plugin.rev160918.health.vnf.onap.plugin.params.HealthCheck;
import org.opendaylight.yangtools.concepts.Builder;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Reader for {@link Element} list node from our YANG model.
*/
public final class ElementStateCustomizer implements InitializingReaderCustomizer<HealthCheck, HealthCheckBuilder> {
private final CrudService<HealthCheck> crudService;
private static final Logger LOG = LoggerFactory.getLogger(ElementStateCustomizer.class);
private final String SCRIPT;
private final String OUTPUT;
private final String VNFC;
private final Boolean PRIMARY;
private static SimpleDateFormat SDF;
public ElementStateCustomizer(final CrudService<HealthCheck> crudService) throws IOException {
this.crudService = crudService;
// initialize data format
SDF = new SimpleDateFormat("MM-dd-yyyy:HH.mm.ss");
// read properties from file
String path = "/opt/config/properties.conf";
Properties prop = new Properties();
InputStream prop_file = new FileInputStream(path);
prop.load(prop_file);
SCRIPT = prop.getProperty("script");
OUTPUT = prop.getProperty("output");
VNFC = prop.getProperty("vnfc");
PRIMARY = Boolean.parseBoolean(prop.getProperty("primary"));
prop_file.close();
}
@Override
public void merge(@Nonnull final Builder<? extends DataObject> builder, @Nonnull final HealthCheck readData) {
// merge children data to parent builder
// used by infrastructure to merge data loaded in separated customizers
((HealthVnfOnapPluginStateBuilder) builder).setHealthCheck(readData);
}
@Nonnull
@Override
public HealthCheckBuilder getBuilder(@Nonnull final InstanceIdentifier<HealthCheck> id) {
// return new builder for this data node
return new HealthCheckBuilder();
}
@Override
public void readCurrentAttributes(@Nonnull final InstanceIdentifier<HealthCheck> id,
@Nonnull final HealthCheckBuilder builder,
@Nonnull final ReadContext ctx) throws ReadFailedException {
List<String> ipAddr = new ArrayList<String>();
if(PRIMARY) {
String ret = readFromFile("/opt/config/oam_vpktgen_ip.txt");
if(ret != null) {
ipAddr.add(ret);
}
ret = readFromFile("/opt/config/oam_vdns_ip.txt");
if(ret != null) {
ipAddr.add(ret);
}
}
// assess the health status of the local service (try at most three times, otherwise return an error).
String healthStatus;
String [] cmdArgs = {"/bin/bash", "-c", SCRIPT};
int ret = -1;
int attempts = 0;
do {
try {
Process child = Runtime.getRuntime().exec(cmdArgs);
// wait for child process to terminate
ret = child.waitFor();
attempts++;
}
catch (IOException e) {
LOG.error("Command: [" + SCRIPT + "] returned an error.");
e.printStackTrace();
}
catch (InterruptedException e) {
LOG.error("Child process: [" + SCRIPT + "] returned an error. Error code: " + ret);
e.printStackTrace();
}
} while(ret != 0 && attempts < 3);
if(ret == 0) {
healthStatus = readFromFile(OUTPUT);
if(healthStatus == null) {
healthStatus = "unhealthy";
}
LOG.info("Assessing the health status of the local component... Return status = \"" + healthStatus + "\"");
}
else {
healthStatus = "unhealthy";
LOG.info("Failed to assess the health status of the local component. Return status = \"unhealthy\"");
}
// perform read of details of data specified by key of Element in id
// final HealthCheck data = crudService.readSpecific(id);
// check the status of other VNF components, if any
if(PRIMARY) {
for(int i = 0; i < ipAddr.size(); i++) {
if(!getRemoteVnfcHealthStatus(ipAddr.get(i))) {
healthStatus = "unhealthy";
}
}
}
// and sets it to builder
builder.setState(healthStatus);
builder.setVnfName(VNFC);
builder.setTime(SDF.format(new Date().getTime()));
if(healthStatus.equals("unhealthy")) {
List<Fault> faultList = new ArrayList<Fault>();
// build a FaultBuilder object in case of one or more VNF components are reporting faults
FaultBuilder faultBuilder = new FaultBuilder();
faultBuilder.setVnfComponent(VNFC);
faultBuilder.setMessage("The VNF is not running correctly");
faultBuilder.setKey(new FaultKey(faultBuilder.getVnfComponent()));
faultList.add(faultBuilder.build());
// build a FaultsBuilder object that contains a list of Fault instances
FaultsBuilder faultsBuilder = new FaultsBuilder();
faultsBuilder.setInfo("One or more VNF components are unreachable");
faultsBuilder.setFault(faultList);
// add the Faults object to HealthCheckBuilder
builder.setFaults(faultsBuilder.build());
}
// create the final HealthCheck object
builder.build();
}
/**
*
* Initialize configuration data based on operational data.
* <p/>
* Very useful when a plugin is initiated but the underlying layer already contains some operation state.
* Deriving the configuration from existing operational state enables reconciliation in case when
* Honeycomb's persistence is not available to do the work for us.
*/
@Nonnull
@Override
public Initialized<? extends DataObject> init(@Nonnull final InstanceIdentifier<HealthCheck> id,
@Nonnull final HealthCheck readValue,
@Nonnull final ReadContext ctx) {
return Initialized.create(id, readValue);
}
private String readFromFile(String path) {
// auto close the file reader
try (BufferedReader br = new BufferedReader(new FileReader(path))) {
String line;
while ((line = br.readLine()) != null) {
return line;
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private boolean getRemoteVnfcHealthStatus(String ipAddr) {
// set up the REST manager
RESTManager mgr = new RESTManager();
Map<String, String> headers = new HashMap<String, String>();
headers.put("Content-Type", "application/json");
headers.put("Accept", "application/json");
// execute the request
String URI = "http://" + ipAddr + ":8183/restconf/operational/health-vnf-onap-plugin:health-vnf-onap-plugin-state/health-check";
Pair<Integer, String> result = mgr.get(URI, "admin", "admin", headers);
return (!result.b.contains("unhealthy"));
}
}
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