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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) [2018-2021] Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/master/LICENSE.txt
* See the License for the specific
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*
* When distributing the software, include this License Header Notice in each
* file and include the License.
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* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
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* GPL Classpath Exception:
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* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
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package fish.payara.healthcheck.mphealth;
import com.sun.enterprise.config.serverbeans.Domain;
import static java.net.HttpURLConnection.HTTP_OK;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import jakarta.validation.constraints.Pattern;
import jakarta.inject.Inject;
import com.sun.enterprise.config.serverbeans.Server;
import com.sun.enterprise.v3.services.impl.GrizzlyService;
import fish.payara.appserver.micro.services.PayaraInstanceImpl;
import fish.payara.micro.ClusterCommandResult;
import fish.payara.micro.data.InstanceDescriptor;
import fish.payara.microprofile.healthcheck.config.MicroprofileHealthCheckConfiguration;
import fish.payara.nucleus.healthcheck.configuration.MicroProfileHealthCheckerConfiguration;
import fish.payara.monitoring.collect.MonitoringData;
import fish.payara.monitoring.collect.MonitoringDataCollector;
import fish.payara.monitoring.collect.MonitoringDataSource;
import fish.payara.monitoring.collect.MonitoringWatchCollector;
import fish.payara.monitoring.collect.MonitoringWatchSource;
import fish.payara.notification.healthcheck.HealthCheckResultEntry;
import fish.payara.notification.healthcheck.HealthCheckResultStatus;
import fish.payara.nucleus.executorservice.PayaraExecutorService;
import fish.payara.nucleus.healthcheck.HealthCheckResult;
import fish.payara.nucleus.healthcheck.preliminary.BaseHealthCheck;
import java.net.URL;
import java.util.Map;
import java.util.Map.Entry;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeoutException;
import java.util.logging.Level;
import java.util.logging.Logger;
import jakarta.ws.rs.ProcessingException;
import org.glassfish.api.admin.ServerEnvironment;
import org.glassfish.config.support.PropertyResolver;
import org.glassfish.config.support.TranslatedConfigView;
import org.glassfish.grizzly.config.dom.NetworkListener;
import org.glassfish.hk2.api.PostConstruct;
import org.glassfish.hk2.runlevel.RunLevel;
import org.jvnet.hk2.annotations.Service;
/**
* Health Check service that pokes MicroProfile Healthcheck endpoints of instances in the current domain to see if they
* are responsive
*
* @author jonathan coustick
* @since 5.184
*/
@Service(name = "healthcheck-mp")
@RunLevel(10)
public class MicroProfileHealthChecker
extends BaseHealthCheck
implements PostConstruct, MonitoringDataSource, MonitoringWatchSource {
private static final Logger LOGGER = Logger.getLogger(MicroProfileHealthChecker.class.getPackage().getName());
private static final String UNABLE_TO_CONNECT = "UNABLE TO CONNECT - ";
private static final String GET_MP_CONFIG_STRING = "get-microprofile-healthcheck-configuration";
@Inject
private PayaraExecutorService payaraExecutorService;
@Inject
GrizzlyService grizzlyService;
@Inject
Domain domain;
@Inject
ServerEnvironment envrionment;
@Inject
private PayaraInstanceImpl payaraMicro;
private volatile Map> priorCollectionTasks;
@Override
public void postConstruct() {
postConstruct(this, MicroProfileHealthCheckerConfiguration.class);
}
@Override
protected HealthCheckResult doCheckInternal() {
HealthCheckResult result = new HealthCheckResult();
if (!envrionment.isDas()) {
// currrently this should only run on DAS
return result;
}
long timeoutMillis = options.getTimeout();
for (Future task : pingAllInstances(timeoutMillis).values()) {
try {
int statusCode = task.get(timeoutMillis, MILLISECONDS);
if (statusCode >= 0) {
result.add(entryFromHttpStatusCode(statusCode));
}
} catch (InterruptedException | TimeoutException ex) {
LOGGER.log(Level.FINE, "Error processing MP Healthcheck checker", ex);
result.add(new HealthCheckResultEntry(HealthCheckResultStatus.CRITICAL,
UNABLE_TO_CONNECT + ex.toString()));
if (ex instanceof InterruptedException) {
Thread.currentThread().interrupt();
}
} catch (ExecutionException ex) {
Throwable cause = ex.getCause();
if (cause instanceof URISyntaxException) {
result.add(new HealthCheckResultEntry(HealthCheckResultStatus.CHECK_ERROR,
"INVALID ENDPOINT: " + ((URISyntaxException) cause).getInput()));
} else if (cause instanceof ProcessingException) {
LOGGER.log(Level.FINE, "Error sending JAX-RS Request", cause);
result.add(new HealthCheckResultEntry(HealthCheckResultStatus.CRITICAL,
UNABLE_TO_CONNECT + cause.getMessage()));
} else {
LOGGER.log(Level.FINE, "Error processing MP Healthcheck checker", cause);
result.add(new HealthCheckResultEntry(HealthCheckResultStatus.CRITICAL,
UNABLE_TO_CONNECT + cause.toString()));
}
}
}
return result;
}
@Override
public void collect(MonitoringWatchCollector collector) {
if (!envrionment.isDas() || options == null || !options.isEnabled()) {
return;
}
collector.watch("ns:health LivelinessUp", "Liveliness UP", "percent")
.red(-60, null, false, null, null, false)
.amber(-100, null, false, null, null, false)
.green(100, null, false, null, null, false);
}
/**
* The idea is that every 12 seconds this data is collected.
* This triggers the tasks.
* If there are tasks from 12 seconds ago these should be done otherwise they are causing a "immediate" timeout
* as next collection is 12 seconds later.
* So from the point of view of the collector results are available "immediately" while the asynchronous tasks
* had 12 seconds to finish.
*/
@Override
@MonitoringData(ns = "health", intervalSeconds = 12)
public void collect(MonitoringDataCollector collector) {
if (!envrionment.isDas() || options == null || !options.isEnabled()) {
return;
}
Map> instances = priorCollectionTasks;
if (instances != null) {
int upCount = 0;
for (Entry> instance : instances.entrySet()) {
try {
int statusCode = instance.getValue().get(10, MILLISECONDS);
if (statusCode == HTTP_OK) {
upCount++;
}
} catch (Exception ex) {
LOGGER.log(Level.FINE, "Failed to ping " + instance.getKey(), ex);
}
}
collector.collect("LivelinessUp",100 * upCount / instances.size());
}
priorCollectionTasks = pingAllInstances(10000L);
}
/**
* Pings MP health check endpoint of all instances and returns a map containing a {@link Future} returning the ping
* status code for that instance. Any exceptions thrown in the process will raise a {@link ExecutionException} when
* the {@link Future} is resolved.
*/
private Map> pingAllInstances(long timeoutMillis) {
Map> tasks = new ConcurrentHashMap<>();
Map> configs = payaraMicro.executeClusteredASAdmin(GET_MP_CONFIG_STRING);
for (Server server : domain.getServers().getServer()) {
@Pattern(regexp = "[A-Za-z0-9_][A-Za-z0-9\\-_\\.;]*", message = "{server.invalid.name}", payload = Server.class)
String instanceName = server.getName();
tasks.put(instanceName, payaraExecutorService.submit(() -> {
// get the remote server's MP HealthCheck config
MicroprofileHealthCheckConfiguration healthCheckConfig = server.getConfig()
.getExtensionByType(MicroprofileHealthCheckConfiguration.class);
if (healthCheckConfig != null && Boolean.valueOf(healthCheckConfig.getEnabled())) {
return pingHealthEndpoint(buildURI(server, healthCheckConfig.getEndpoint()));
}
return -1;
}));
}
for (InstanceDescriptor instance : payaraMicro.getClusteredPayaras()) {
String instanceName = instance.getInstanceName();
if (tasks.containsKey(instanceName)) {
continue;
}
tasks.put(instanceName, payaraExecutorService.submit(() -> {
ClusterCommandResult mpHealthConfigResult = configs.get(instance.getMemberUUID()) //
.get(timeoutMillis, MILLISECONDS);
String values = mpHealthConfigResult.getOutput().split("\n")[1];
Boolean enabled = Boolean.parseBoolean(values.split(" ")[0]);
if (enabled) {
String endpoint = values.split(" ", 2)[1].trim();
return pingHealthEndpoint(buildURI(instance, endpoint));
}
return -1;
}));
}
return tasks;
}
@Override
public HealthCheckTimeoutExecutionOptions constructOptions(MicroProfileHealthCheckerConfiguration c) {
return new HealthCheckTimeoutExecutionOptions(Boolean.valueOf(c.getEnabled()), Long.parseLong(c.getTime()),
asTimeUnit(c.getUnit()), Boolean.valueOf(c.getAddToMicroProfileHealth()), Long.parseLong(c.getTimeout()));
}
@Override
protected String getDescription() {
return "healthcheck.description.MPhealthcheck";
}
private static URI buildURI(InstanceDescriptor instance, String endpoint) throws URISyntaxException {
URL usedURL = instance.getApplicationURLS().get(0);
return new URI(usedURL.getProtocol(), usedURL.getUserInfo(), usedURL.getHost(), usedURL.getPort(),
"/" + endpoint, null, null);
}
private URI buildURI(Server server, String endpoint) throws URISyntaxException {
NetworkListener listener = server.getConfig().getNetworkConfig().getNetworkListeners().getNetworkListener()
.get(0);
String protocol = Boolean.parseBoolean(listener.findHttpProtocol().getSecurityEnabled()) ? "https" : "http";
String basePort = listener.getPort();
Integer truePort = 8080;
try {
truePort = Integer.parseInt(basePort);
} catch (NumberFormatException e) {
PropertyResolver configProps = new PropertyResolver(domain, server.getName());
String sysPropsPort = configProps.getPropertyValue(basePort);
truePort = Integer.parseInt(sysPropsPort);
}
return new URI(protocol, null, TranslatedConfigView.expandValue(listener.getAddress()), truePort,
"/" + endpoint, null, null);
}
/**
* Sends request to remote healthcheck endpoint to get the status
*/
private static int pingHealthEndpoint(URI remote) throws IOException {
HttpURLConnection conn = (HttpURLConnection) remote.toURL().openConnection();
conn.setRequestMethod("GET");
conn.setRequestProperty("Accept", "application/json");
int statusCode = conn.getResponseCode();
conn.disconnect();
return statusCode;
}
private static HealthCheckResultEntry entryFromHttpStatusCode(int statusCode) {
switch (statusCode) {
case 200:
return new HealthCheckResultEntry(HealthCheckResultStatus.GOOD, "UP");
case 503:
return new HealthCheckResultEntry(HealthCheckResultStatus.WARNING, "DOWN");
case 500:
return new HealthCheckResultEntry(HealthCheckResultStatus.CRITICAL, "FAILURE");
default:
return new HealthCheckResultEntry(HealthCheckResultStatus.CHECK_ERROR, "UNKNOWN RESPONSE");
}
}
}
