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package org.openslx.taskmanager.tasks;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import org.openslx.taskmanager.api.AbstractTask;
import com.google.gson.annotations.Expose;
import com.jcabi.ssh.SSH;
import com.jcabi.ssh.Shell;
public class RemoteReboot extends AbstractTask
{
@Expose
private Client[] clients;
@Expose
private boolean shutdown;
@Expose
private int minutes;
@Expose
private String locationId;
@Expose
private String locationName;
@Expose
private String sshkey;
@Expose
private int port;
private Output status = new Output();
@Override
protected boolean initTask()
{
this.setStatusObject( this.status );
if ( minutes < 0 ) {
status.addError( "Delay cannot be negative" );
}
if ( sshkey == null || sshkey.length() == 0 ) {
status.addError( "No SSH key given" );
}
if ( port < 1 || port > 65535 ) {
status.addError( "Invalid port number" );
}
if ( status.error != null )
return false;
status.clients = clients;
Date shutdownTime = new Date(System.currentTimeMillis()+minutes*60*1000);
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
status.time = sdf.format(shutdownTime);
status.locationId = locationId;
status.locationName = locationName;
return true;
}
@Override
protected boolean execute()
{
if ( clients.length == 0 )
return true;
final List<Client> rebootingClients = new ArrayList<>();
// try to connect to every client and start the reboot/shutdown process
ExecutorService tp = Executors.newFixedThreadPool( clients.length > 4 ? 4 : clients.length );
for (final Client client : clients) {
if ( client == null || client.clientip == null || client.machineuuid == null ) {
status.addError( "null Client or missing ip/uuid in list, ignoring." );
continue;
}
status.clientStatus.put(client.machineuuid, ClientStatus.CONNECTING);
tp.submit(new Runnable() {
public void run() {
try {
Shell shell = new SSH(client.clientip, port, "root", sshkey);
if (shutdown) {
new Shell.Empty(shell).exec("/sbin/shutdown +" + minutes);
status.clientStatus.put(client.machineuuid, minutes == 0 ? ClientStatus.SHUTDOWN : ClientStatus.SHUTDOWN_AT);
} else {
new Shell.Empty(shell).exec("/sbin/reboot");
status.clientStatus.put(client.machineuuid, ClientStatus.REBOOTING);
rebootingClients.add( client );
}
} catch (IOException e) {
status.clientStatus.put(client.machineuuid, ClientStatus.ERROR);
}
}
});
}
tp.shutdown();
try {
tp.awaitTermination( clients.length * 5, TimeUnit.SECONDS );
} catch ( InterruptedException e ) {
Thread.currentThread().interrupt();
return false;
}
if (rebootingClients.size() > 0) {
// Give about 3 minutes for reboot, should be plenty
final int[] ports;
if ( this.port == 22 ) {
ports = new int[] { 22, 445 };
} else {
ports = new int[] { this.port, 22, 445 };
}
try {
Thread.sleep(30000);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
return false;
}
long lastcheck = System.currentTimeMillis();
long deadline = lastcheck + 120 * 1000;
while ( rebootingClients.size() > 0 && System.currentTimeMillis() < deadline ) {
long delay = 10000 - (System.currentTimeMillis() - lastcheck);
if ( delay > 0 ) {
try {
Thread.sleep(delay);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
return false;
}
}
lastcheck = System.currentTimeMillis();
Iterator<Client> it = rebootingClients.iterator();
while (it.hasNext()) {
Client client = it.next();
if (isOnline(client.clientip, ports)) {
it.remove();
status.clientStatus.put(client.machineuuid, ClientStatus.ONLINE);
}
}
}
}
// change status of clients that got stuck because of timeouts
for (Map.Entry<String, ClientStatus> entry : status.clientStatus.entrySet()) {
ClientStatus value = entry.getValue();
if (value == ClientStatus.CONNECTING || value == ClientStatus.REBOOTING) {
entry.setValue(ClientStatus.ERROR);
}
}
return true;
}
private boolean isOnline(String address, int... ports)
{
for ( int port : ports ) {
try ( Socket s = new Socket() ) {
s.connect( new InetSocketAddress( address, port ), 1000 );
return true;
} catch ( Exception ex ) {
}
}
return false;
}
/**
* Output - contains additional status data of this task
*/
@SuppressWarnings( "unused" )
static class Output
{
private Map<String, ClientStatus> clientStatus = new ConcurrentHashMap<>();
private Client[] clients;
private String time;
private String locationId;
private String locationName;
private String error;
private void addError( String e )
{
if ( error == null ) {
error = e + "\n";
} else {
error += e + "\n";
}
}
}
@SuppressWarnings( "unused" )
static class Client
{
@Expose
private String machineuuid;
@Expose
private String clientip;
}
static enum ClientStatus {
CONNECTING, REBOOTING, SHUTDOWN, SHUTDOWN_AT, ONLINE, ERROR;
}
}
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