public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
StringBuilder sb = new StringBuilder();
try {
Monitor.fetchData();
bannerText =
sanitize(ServerConfiguration.getSystemConfiguration().get(Property.MONITOR_BANNER_TEXT));
bannerColor =
ServerConfiguration.getSystemConfiguration()
.get(Property.MONITOR_BANNER_COLOR)
.replace("'", "'");
bannerBackground =
ServerConfiguration.getSystemConfiguration()
.get(Property.MONITOR_BANNER_BACKGROUND)
.replace("'", "'");
pageStart(req, resp, sb);
pageBody(req, resp, sb);
pageEnd(req, resp, sb);
} catch (Throwable t) {
log.error("Error building page " + req.getRequestURI(), t);
sb.append("\n<pre>\n");
StringWriter sw = new StringWriter();
t.printStackTrace(new PrintWriter(sw));
sb.append(sanitize(sw.getBuffer().toString()));
sb.append("</pre>\n");
} finally {
resp.getWriter().print(sb);
resp.getWriter().flush();
}
}
private static GCStatus fetchGcStatus() {
GCStatus result = null;
HostAndPort address = null;
try {
// Read the gc location from its lock
ZooReaderWriter zk = ZooReaderWriter.getInstance();
String path = ZooUtil.getRoot(instance) + Constants.ZGC_LOCK;
List<String> locks = zk.getChildren(path, null);
if (locks != null && locks.size() > 0) {
Collections.sort(locks);
address =
new ServerServices(
new String(zk.getData(path + "/" + locks.get(0), null), StandardCharsets.UTF_8))
.getAddress(Service.GC_CLIENT);
GCMonitorService.Client client =
ThriftUtil.getClient(
new GCMonitorService.Client.Factory(), address, config.getConfiguration());
try {
result = client.getStatus(Tracer.traceInfo(), SystemCredentials.get().toThrift(instance));
} finally {
ThriftUtil.returnClient(client);
}
}
} catch (Exception ex) {
log.warn("Unable to contact the garbage collector at " + address, ex);
}
return result;
}
public static void main(String[] args) throws Exception {
SecurityUtil.serverLogin(ServerConfiguration.getSiteConfiguration());
VolumeManager fs = VolumeManagerImpl.get();
ServerOpts opts = new ServerOpts();
opts.parseArgs("monitor", args);
String hostname = opts.getAddress();
instance = HdfsZooInstance.getInstance();
config = new ServerConfiguration(instance);
Accumulo.init(fs, config, "monitor");
Monitor monitor = new Monitor();
Accumulo.enableTracing(hostname, "monitor");
monitor.run(hostname);
}
private static SystemToken get(Instance instance) {
byte[] instanceIdBytes = instance.getInstanceID().getBytes(StandardCharsets.UTF_8);
byte[] confChecksum;
MessageDigest md;
try {
md = MessageDigest.getInstance(Constants.PW_HASH_ALGORITHM);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Failed to compute configuration checksum", e);
}
// seed the config with the version and instance id, so at least it's not empty
md.update(ServerConstants.WIRE_VERSION.toString().getBytes(StandardCharsets.UTF_8));
md.update(instanceIdBytes);
for (Entry<String, String> entry : ServerConfiguration.getSiteConfiguration()) {
// only include instance properties
if (entry.getKey().startsWith(Property.INSTANCE_PREFIX.toString())) {
md.update(entry.getKey().getBytes(StandardCharsets.UTF_8));
md.update(entry.getValue().getBytes(StandardCharsets.UTF_8));
}
}
confChecksum = md.digest();
int wireVersion = ServerConstants.WIRE_VERSION;
ByteArrayOutputStream bytes =
new ByteArrayOutputStream(
3 * (Integer.SIZE / Byte.SIZE) + instanceIdBytes.length + confChecksum.length);
DataOutputStream out = new DataOutputStream(bytes);
try {
out.write(wireVersion * -1);
out.write(instanceIdBytes.length);
out.write(instanceIdBytes);
out.write(confChecksum.length);
out.write(confChecksum);
} catch (IOException e) {
// this is impossible with ByteArrayOutputStream; crash hard if this happens
throw new RuntimeException(e);
}
return new SystemToken(Base64.encodeBase64(bytes.toByteArray()));
}
private void registerInZooKeeper(String name) throws Exception {
String root = ZooUtil.getRoot(serverConfiguration.getInstance()) + Constants.ZTRACERS;
IZooReaderWriter zoo = ZooReaderWriter.getInstance();
String path = zoo.putEphemeralSequential(root + "/trace-", name.getBytes());
zoo.exists(path, this);
}
public TraceServer(ServerConfiguration serverConfiguration, String hostname) throws Exception {
this.serverConfiguration = serverConfiguration;
AccumuloConfiguration conf = serverConfiguration.getConfiguration();
table = conf.get(Property.TRACE_TABLE);
while (true) {
try {
String principal = conf.get(Property.TRACE_USER);
AuthenticationToken at;
Map<String, String> loginMap =
conf.getAllPropertiesWithPrefix(Property.TRACE_TOKEN_PROPERTY_PREFIX);
if (loginMap.isEmpty()) {
Property p = Property.TRACE_PASSWORD;
at = new PasswordToken(conf.get(p).getBytes());
} else {
Properties props = new Properties();
AuthenticationToken token =
AccumuloClassLoader.getClassLoader()
.loadClass(conf.get(Property.TRACE_TOKEN_TYPE))
.asSubclass(AuthenticationToken.class)
.newInstance();
int prefixLength = Property.TRACE_TOKEN_PROPERTY_PREFIX.getKey().length() + 1;
for (Entry<String, String> entry : loginMap.entrySet()) {
props.put(entry.getKey().substring(prefixLength), entry.getValue());
}
token.init(props);
at = token;
}
connector = serverConfiguration.getInstance().getConnector(principal, at);
if (!connector.tableOperations().exists(table)) {
connector.tableOperations().create(table);
IteratorSetting setting = new IteratorSetting(10, "ageoff", AgeOffFilter.class.getName());
AgeOffFilter.setTTL(setting, 7 * 24 * 60 * 60 * 1000l);
connector.tableOperations().attachIterator(table, setting);
}
connector
.tableOperations()
.setProperty(
table, Property.TABLE_FORMATTER_CLASS.getKey(), TraceFormatter.class.getName());
break;
} catch (Exception ex) {
log.info("Waiting to checking/create the trace table.", ex);
UtilWaitThread.sleep(1000);
}
}
int port = conf.getPort(Property.TRACE_PORT);
final ServerSocket sock = ServerSocketChannel.open().socket();
sock.setReuseAddress(true);
sock.bind(new InetSocketAddress(hostname, port));
final TServerTransport transport = new TServerSocket(sock);
TThreadPoolServer.Args options = new TThreadPoolServer.Args(transport);
options.processor(new Processor<Iface>(new Receiver()));
server = new TThreadPoolServer(options);
registerInZooKeeper(sock.getInetAddress().getHostAddress() + ":" + sock.getLocalPort());
writer =
connector.createBatchWriter(
table, new BatchWriterConfig().setMaxLatency(5, TimeUnit.SECONDS));
}
public static AccumuloConfiguration getSystemConfiguration() {
return config.getConfiguration();
}
public void run(String hostname) {
try {
getMonitorLock();
} catch (Exception e) {
log.error("Failed to get Monitor ZooKeeper lock");
throw new RuntimeException(e);
}
Monitor.START_TIME = System.currentTimeMillis();
int port = config.getConfiguration().getPort(Property.MONITOR_PORT);
try {
log.debug("Creating monitor on port " + port);
server = new EmbeddedWebServer(hostname, port);
} catch (Throwable ex) {
log.error("Unable to start embedded web server", ex);
throw new RuntimeException(ex);
}
server.addServlet(DefaultServlet.class, "/");
server.addServlet(OperationServlet.class, "/op");
server.addServlet(MasterServlet.class, "/master");
server.addServlet(TablesServlet.class, "/tables");
server.addServlet(TServersServlet.class, "/tservers");
server.addServlet(ProblemServlet.class, "/problems");
server.addServlet(GcStatusServlet.class, "/gc");
server.addServlet(LogServlet.class, "/log");
server.addServlet(XMLServlet.class, "/xml");
server.addServlet(JSONServlet.class, "/json");
server.addServlet(VisServlet.class, "/vis");
server.addServlet(Summary.class, "/trace/summary");
server.addServlet(ListType.class, "/trace/listType");
server.addServlet(ShowTrace.class, "/trace/show");
if (server.isUsingSsl()) server.addServlet(ShellServlet.class, "/shell");
server.start();
try {
hostname = InetAddress.getLocalHost().getHostName();
log.debug("Using " + hostname + " to advertise monitor location in ZooKeeper");
String monitorAddress = HostAndPort.fromParts(hostname, server.getPort()).toString();
ZooReaderWriter.getInstance()
.putPersistentData(
ZooUtil.getRoot(instance) + Constants.ZMONITOR_HTTP_ADDR,
monitorAddress.getBytes(StandardCharsets.UTF_8),
NodeExistsPolicy.OVERWRITE);
log.info("Set monitor address in zookeeper to " + monitorAddress);
} catch (Exception ex) {
log.error("Unable to set monitor HTTP address in zookeeper", ex);
}
if (null != hostname) {
LogService.startLogListener(
Monitor.getSystemConfiguration(), instance.getInstanceID(), hostname);
} else {
log.warn("Not starting log4j listener as we could not determine address to use");
}
new Daemon(new LoggingRunnable(log, new ZooKeeperStatus()), "ZooKeeperStatus").start();
// need to regularly fetch data so plot data is updated
new Daemon(
new LoggingRunnable(
log,
new Runnable() {
@Override
public void run() {
while (true) {
try {
Monitor.fetchData();
} catch (Exception e) {
log.warn(e.getMessage(), e);
}
UtilWaitThread.sleep(333);
}
}
}),
"Data fetcher")
.start();
}
