appc-adapters/appc-iaas-adapter/appc-iaas-adapter-bundle/src/main/java/org/onap/appc/adapter/iaas/provider/operation/impl/RebuildServer.java

   1 /*
   2 * ============LICENSE_START=======================================================
   3 * ONAP : APPC
   4 * ================================================================================
   5 * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
   6 * ================================================================================
   7 * Copyright (C) 2017 Amdocs
   8 * =============================================================================
   9 * Modifications Copyright (C) 2019 IBM
  10 * =============================================================================
  11 * Licensed under the Apache License, Version 2.0 (the "License");
  12 * you may not use this file except in compliance with the License.
  13 * You may obtain a copy of the License at
  14 *
  15 *      http://www.apache.org/licenses/LICENSE-2.0
  16 *
  17 * Unless required by applicable law or agreed to in writing, software
  18 * distributed under the License is distributed on an "AS IS" BASIS,
  19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  20 * See the License for the specific language governing permissions and
  21 * limitations under the License.
  22 *
  23 * ============LICENSE_END=========================================================
  24 */
  25
  26 package org.onap.appc.adapter.iaas.provider.operation.impl;
  27
  28 import com.att.cdp.exceptions.ContextConnectionException;
  29 import com.att.cdp.exceptions.ResourceNotFoundException;
  30 import com.att.cdp.exceptions.ZoneException;
  31 import com.att.cdp.zones.ComputeService;
  32 import com.att.cdp.zones.Context;
  33 import com.att.cdp.zones.ImageService;
  34 import com.att.cdp.zones.Provider;
  35 import com.att.cdp.zones.model.Image;
  36 import com.att.cdp.zones.model.ModelObject;
  37 import com.att.cdp.zones.model.Server;
  38 import com.att.cdp.zones.model.ServerBootSource;
  39 import com.att.eelf.configuration.EELFLogger;
  40 import com.att.eelf.configuration.EELFManager;
  41 import com.att.eelf.i18n.EELFResourceManager;
  42 import org.glassfish.grizzly.http.util.HttpStatus;
  43 import org.onap.appc.Constants;
  44 import com.fasterxml.jackson.databind.JsonNode;
  45 import com.fasterxml.jackson.databind.ObjectMapper;
  46 import org.onap.appc.adapter.iaas.ProviderAdapter;
  47 import org.onap.appc.adapter.iaas.impl.IdentityURL;
  48 import org.onap.appc.adapter.iaas.impl.RequestContext;
  49 import org.onap.appc.adapter.iaas.impl.RequestFailedException;
  50 import org.onap.appc.adapter.iaas.impl.VMURL;
  51 import org.onap.appc.adapter.iaas.provider.operation.common.constants.Property;
  52 import org.onap.appc.adapter.iaas.provider.operation.common.enums.Operation;
  53 import org.onap.appc.adapter.iaas.provider.operation.common.enums.Outcome;
  54 import org.onap.appc.adapter.iaas.provider.operation.impl.base.ProviderServerOperation;
  55 import org.onap.appc.configuration.Configuration;
  56 import org.onap.appc.configuration.ConfigurationFactory;
  57 import org.onap.appc.exceptions.APPCException;
  58 import org.onap.appc.i18n.Msg;
  59 import org.onap.appc.logging.LoggingConstants;
  60 import org.onap.appc.logging.LoggingUtils;
  61 import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
  62 import org.slf4j.MDC;
  63 import java.text.DateFormat;
  64 import java.text.SimpleDateFormat;
  65 import java.util.Date;
  66 import java.util.List;
  67 import java.util.Map;
  68 import static org.onap.appc.adapter.iaas.provider.operation.common.enums.Operation.STOP_SERVICE;
  69 import static org.onap.appc.adapter.utils.Constants.ADAPTER_NAME;
  70 import com.att.cdp.exceptions.StateException;
  71
  72 public class RebuildServer extends ProviderServerOperation {
  73
  74     private static final EELFLogger logger = EELFManager.getInstance().getLogger(RebuildServer.class);
  75     private static EELFLogger metricsLogger = EELFManager.getInstance().getMetricsLogger();
  76     private static final Configuration configuration = ConfigurationFactory.getConfiguration();
  77     // the sleep time used by thread.sleep to give "some time for OpenStack to start
  78     // processing the request"
  79     private long rebuildSleepTime = 10L * 1000L;
  80
  81     /**
  82      * Rebuild the indicated server with the indicated image. This method assumes
  83      * the server has been determined to be in the correct state to do the rebuild.
  84      *
  85      * @param rc
  86      *            The request context that manages the state and recovery of the
  87      *            request for the life of its processing.
  88      * @param server
  89      *            the server to be rebuilt
  90      * @param image
  91      *            The image to be used (or snapshot)
  92      * @throws RequestFailedException
  93      *             if the server does not change state in the allotted time
  94      */
  95     @SuppressWarnings("nls")
  96     private void rebuildServer(RequestContext rc, Server server, String image) throws RequestFailedException {
  97         logger.debug(Msg.REBUILD_SERVER, server.getId());
  98         String msg;
  99         Context context = server.getContext();
 100         Provider provider = context.getProvider();
 101         ComputeService service = context.getComputeService();
 102         /*
 103          * Set Time for Metrics Logger
 104          */
 105         setTimeForMetricsLogger();
 106         try {
 107             while (rc.attempt()) {
 108                 try {
 109                     server.rebuild(image);
 110                     break;
 111                 } catch (ContextConnectionException e) {
 112                     msg = EELFResourceManager.format(Msg.CONNECTION_FAILED_RETRY, provider.getName(), service.getURL(),
 113                             context.getTenant().getName(), context.getTenant().getId(), e.getMessage(),
 114                             Long.toString(rc.getRetryDelay()), Integer.toString(rc.getAttempts()),
 115                             Integer.toString(rc.getRetryLimit()));
 116                     logger.error(msg, e);
 117                     metricsLogger.error(msg, e);
 118                     rc.delay();
 119                 }
 120             }
 121             /*
 122              * We need to provide some time for OpenStack to start processing the request.
 123              */
 124             try {
 125                 Thread.sleep(rebuildSleepTime);
 126             } catch (InterruptedException e) {
 127                 logger.trace("Sleep threw interrupted exception, should never occur");
 128                 metricsLogger.trace("Sleep threw interrupted exception, should never occur");
 129                 Thread.currentThread().interrupt();
 130             }
 131         } catch (ZoneException e) {
 132             msg = EELFResourceManager.format(Msg.REBUILD_SERVER_FAILED, server.getName(), server.getId(),
 133                     e.getMessage());
 134             logger.error(msg);
 135             metricsLogger.error(msg);
 136             throw new RequestFailedException("Rebuild Server", msg, HttpStatus.BAD_GATEWAY_502, server);
 137         }
 138         rc.reset();
 139         /*
 140          * Once we have started the process, now we wait for the final state of stopped.
 141          * This should be the final state (since we started the rebuild with the server
 142          * stopped).
 143          */
 144         waitForStateChange(rc, server, Server.Status.READY);
 145         if (rc.isFailed()) {
 146             msg = EELFResourceManager.format(Msg.CONNECTION_FAILED, provider.getName(), service.getURL());
 147             logger.error(msg);
 148             metricsLogger.error(msg);
 149             throw new RequestFailedException("Rebuild Server", msg, HttpStatus.BAD_GATEWAY_502, server);
 150         }
 151         rc.reset();
 152     }
 153
 154     /**
 155      * This method is called to rebuild the provided server.
 156      * <p>
 157      * If the server was booted from a volume, then the request is failed
 158      * immediately and no action is taken. Rebuilding a VM from a bootable volume,
 159      * where the bootable volume itself is not rebuilt, serves no purpose.
 160      * </p>
 161      *
 162      * @param rc
 163      *            The request context that manages the state and recovery of the
 164      *            request for the life of its processing.
 165      * @param server
 166      *            The server to be rebuilt
 167      * @throws ZoneException
 168      *             When error occurs
 169      * @throws RequestFailedException
 170      *             When server status is error
 171      */
 172     @SuppressWarnings("nls")
 173     private void rebuildServer(RequestContext rc, Server server, SvcLogicContext ctx)
 174             throws ZoneException, RequestFailedException {
 175         ServerBootSource builtFrom = server.getBootSource();
 176         /*
 177          * Set Time for Metrics Logger
 178          */
 179         setTimeForMetricsLogger();
 180         String msg;
 181         // Throw error if boot source is unknown
 182         if (ServerBootSource.UNKNOWN.equals(builtFrom)) {
 183             logger.debug("Boot Source Unknown");
 184             msg = String.format("Error occured when retrieving server boot source [%s]!!!", server.getId());
 185             logger.error(msg);
 186             generateEvent(rc, false, msg);
 187             metricsLogger.error(msg);
 188             throw new RequestFailedException("Rebuild Server", msg, HttpStatus.INTERNAL_SERVER_ERROR_500, server);
 189         }
 190
 191         // Throw exception for non image/snap boot source
 192         if (ServerBootSource.VOLUME.equals(builtFrom)) {
 193             logger.debug("Boot Source Not Supported built from bootable volume");
 194             msg = String.format("Rebuilding is currently not supported for servers built from bootable volumes [%s]",
 195                     server.getId());
 196             generateEvent(rc, false, msg);
 197             logger.error(msg);
 198             metricsLogger.error(msg);
 199             throw new RequestFailedException("Rebuild Server", msg, HttpStatus.FORBIDDEN_403, server);
 200         }
 201         /*
 202          * Pending is a bit of a special case. If we find the server is in a pending
 203          * state, then the provider is in the process of changing state of the server.
 204          * So, lets try to wait a little bit and see if the state settles down to one we
 205          * can deal with. If not, then we have to fail the request.
 206          */
 207         Context context = server.getContext();
 208         Provider provider = context.getProvider();
 209         ComputeService service = context.getComputeService();
 210         if (server.getStatus().equals(Server.Status.PENDING)) {
 211             rc.reset();
 212             waitForStateChange(rc, server, Server.Status.READY, Server.Status.RUNNING, Server.Status.ERROR,
 213                     Server.Status.SUSPENDED, Server.Status.PAUSED);
 214         }
 215         // Is the skip Hypervisor check attribute populated?
 216         String skipHypervisorCheck = configuration.getProperty(Property.SKIP_HYPERVISOR_CHECK);
 217         if (skipHypervisorCheck == null && ctx != null) {
 218             skipHypervisorCheck = ctx.getAttribute(ProviderAdapter.SKIP_HYPERVISOR_CHECK);
 219         }
 220         // Always perform Hypervisor Status checks
 221         // unless the skip is set to true
 222         if (skipHypervisorCheck == null || (!"true".equalsIgnoreCase(skipHypervisorCheck))) {
 223             // Check of the Hypervisor for the VM Server is UP and reachable
 224             checkHypervisor(server);
 225         }
 226         /*
 227          * Get the image to use in this priority order: (1) If snapshot-id provided in
 228          * the request, use this (2) If any snapshots exist, then the latest snapshot is
 229          * used (3) Otherwise the image used to construct the VM is used.
 230          */
 231         String imageToUse = "";
 232         try {
 233             ObjectMapper mapper = new ObjectMapper();
 234             String payloadStr = configuration.getProperty(Property.PAYLOAD);
 235             if (payloadStr == null || payloadStr.isEmpty()) {
 236                 payloadStr = ctx.getAttribute(ProviderAdapter.PAYLOAD);
 237             }
 238             JsonNode payloadNode = mapper.readTree(payloadStr);
 239             imageToUse = payloadNode.get(ProviderAdapter.PROPERTY_REQUEST_SNAPSHOT_ID).textValue();
 240             logger.debug("Pulled snapshot-id " + imageToUse + " from the payload");
 241         } catch (Exception e) {
 242             logger.debug("Exception attempting to pull snapshot-id from the payload: " + e.toString());
 243         }
 244         List<Image> snapshots = server.getSnapshots();
 245         ImageService imageService = server.getContext().getImageService();
 246         List<Image> imageList = imageService.listImages();
 247         if (!imageToUse.isEmpty()) {
 248             logger.debug("Using snapshot-id " + imageToUse + " for the rebuild request");
 249             boolean imgFound = validateSnapshotId(imageToUse, snapshots, imageList);
 250
 251             if (!imgFound) {
 252                 logger.debug("Image Snapshot Not Found");
 253                 msg = EELFResourceManager.format(Msg.REBUILD_SERVER_FAILED, server.getName(), server.getId(),
 254                         "Invalid Snapshot-Id");
 255                 logger.error(msg);
 256                 metricsLogger.error(msg);
 257                 throw new RequestFailedException("Rebuild Server", msg, HttpStatus.FORBIDDEN_403, server);
 258             }
 259         } else if (snapshots != null && !snapshots.isEmpty()) {
 260             logger.debug("Using snapshot-id when image is Empty" + imageToUse + " for the rebuild request");
 261             imageToUse = snapshots.get(0).getId();
 262         } else {
 263             imageToUse = server.getImage();
 264             rc.reset();
 265             try {
 266                 while (rc.attempt()) {
 267                     try {
 268                         /*
 269                          * We are just trying to make sure that the image exists. We arent interested in
 270                          * the details at this point.
 271                          */
 272                         imageService.getImage(imageToUse);
 273                         break;
 274                     } catch (ContextConnectionException e) {
 275                         msg = EELFResourceManager.format(Msg.CONNECTION_FAILED_RETRY, provider.getName(),
 276                                 imageService.getURL(), context.getTenant().getName(), context.getTenant().getId(),
 277                                 e.getMessage(), Long.toString(rc.getRetryDelay()), Integer.toString(rc.getAttempts()),
 278                                 Integer.toString(rc.getRetryLimit()));
 279                         logger.error(msg, e);
 280                         metricsLogger.error(msg);
 281                         rc.delay();
 282                     }
 283                 }
 284             } catch (ZoneException e) {
 285                 msg = EELFResourceManager.format(Msg.IMAGE_NOT_FOUND, imageToUse, "rebuild");
 286                 generateEvent(rc, false, msg);
 287                 logger.error(msg);
 288                 metricsLogger.error(msg);
 289                 throw new RequestFailedException("Rebuild Server", msg, HttpStatus.METHOD_NOT_ALLOWED_405, server);
 290             }
 291         }
 292         if (rc.isFailed()) {
 293             msg = EELFResourceManager.format(Msg.CONNECTION_FAILED, provider.getName(), service.getURL());
 294             logger.error(msg);
 295             metricsLogger.error(msg);
 296             throw new RequestFailedException("Rebuild Server", msg, HttpStatus.BAD_GATEWAY_502, server);
 297         }
 298         rc.reset();
 299         /*
 300          * We determine what to do based on the current state of the server
 301          */
 302         switch (server.getStatus()) {
 303         case DELETED:
 304             // Nothing to do, the server is gone
 305             msg = EELFResourceManager.format(Msg.SERVER_DELETED, server.getName(), server.getId(), server.getTenantId(),
 306                     "rebuilt");
 307             generateEvent(rc, false, msg);
 308             logger.error(msg);
 309             metricsLogger.error(msg);
 310             throw new RequestFailedException("Rebuild Server", msg, HttpStatus.METHOD_NOT_ALLOWED_405, server);
 311         case RUNNING:
 312             // Attempt to stop the server, then rebuild it
 313             stopServer(rc, server);
 314             rc.reset();
 315             rebuildServer(rc, server, imageToUse);
 316             rc.reset();
 317             startServer(rc, server);
 318             generateEvent(rc, true, Outcome.SUCCESS.toString());
 319             metricsLogger.info("Server status: RUNNING");
 320             break;
 321         case ERROR:
 322             msg = EELFResourceManager.format(Msg.SERVER_ERROR_STATE, server.getName(), server.getId(),
 323                     server.getTenantId(), "rebuild");
 324             generateEvent(rc, false, msg);
 325             logger.error(msg);
 326             metricsLogger.error(msg);
 327             throw new RequestFailedException("Rebuild Server", msg, HttpStatus.METHOD_NOT_ALLOWED_405, server);
 328         case READY:
 329             // Attempt to rebuild the server
 330             rebuildServer(rc, server, imageToUse);
 331             rc.reset();
 332             startServer(rc, server);
 333             generateEvent(rc, true, Outcome.SUCCESS.toString());
 334             metricsLogger.info("Server status: READY");
 335             break;
 336         case PAUSED:
 337             // if paused, un-pause it, stop it, and rebuild it
 338             unpauseServer(rc, server);
 339             rc.reset();
 340             stopServer(rc, server);
 341             rc.reset();
 342             rebuildServer(rc, server, imageToUse);
 343             rc.reset();
 344             startServer(rc, server);
 345             generateEvent(rc, true, Outcome.SUCCESS.toString());
 346             metricsLogger.info("Server status: PAUSED");
 347             break;
 348         case SUSPENDED:
 349             // Attempt to resume the suspended server, stop it, and rebuild it
 350             resumeServer(rc, server);
 351             rc.reset();
 352             stopServer(rc, server);
 353             rc.reset();
 354             rebuildServer(rc, server, imageToUse);
 355             rc.reset();
 356             startServer(rc, server);
 357             generateEvent(rc, true, Outcome.SUCCESS.toString());
 358             metricsLogger.info("Server status: SUSPENDED");
 359             break;
 360         default:
 361             // Hmmm, unknown status, should never occur
 362             msg = EELFResourceManager.format(Msg.UNKNOWN_SERVER_STATE, server.getName(), server.getId(),
 363                     server.getTenantId(), server.getStatus().name());
 364             generateEvent(rc, false, msg);
 365             logger.error(msg);
 366             metricsLogger.error(msg);
 367             throw new RequestFailedException("Rebuild Server", msg, HttpStatus.METHOD_NOT_ALLOWED_405, server);
 368         }
 369     }
 370
 371     /**
 372      * @see org.onap.appc.adapter.iaas.ProviderAdapter#rebuildServer(java.util.Map,
 373      *      org.onap.ccsdk.sli.core.sli.SvcLogicContext)
 374      */
 375     @SuppressWarnings("nls")
 376     public Server rebuildServer(Map<String, String> params, SvcLogicContext ctx) throws APPCException {
 377         Server server = null;
 378         RequestContext rc = new RequestContext(ctx);
 379         rc.isAlive();
 380         setTimeForMetricsLogger();
 381         String msg;
 382         try {
 383             validateParametersExist(params, ProviderAdapter.PROPERTY_INSTANCE_URL,
 384                     ProviderAdapter.PROPERTY_PROVIDER_NAME);
 385             String appName = configuration.getProperty(Constants.PROPERTY_APPLICATION_NAME);
 386             String vm_url = params.get(ProviderAdapter.PROPERTY_INSTANCE_URL);
 387             VMURL vm = VMURL.parseURL(vm_url);
 388             if (validateVM(rc, appName, vm_url, vm))
 389                 return null;
 390             IdentityURL ident = IdentityURL.parseURL(params.get(ProviderAdapter.PROPERTY_IDENTITY_URL));
 391             String identStr = (ident == null) ? null : ident.toString();
 392             ctx.setAttribute("REBUILD_STATUS", "ERROR");
 393             Context context = null;
 394             String tenantName = "Unknown";// to be used also in case of exception
 395             try {
 396                 context = getContext(rc, vm_url, identStr);
 397                 if (context != null) {
 398                     tenantName = context.getTenantName();// this varaible also is used in case of exception
 399                     rc.reset();
 400                     server = lookupServer(rc, context, vm.getServerId());
 401                     logger.debug(Msg.SERVER_FOUND, vm_url, tenantName, server.getStatus().toString());
 402                     // Manually checking image service until new PAL release
 403                     if (hasImageAccess(rc, context)) {
 404                         rebuildServer(rc, server, ctx);
 405                         doSuccess(rc);
 406                         ctx.setAttribute("REBUILD_STATUS", "SUCCESS");
 407                     } else {
 408                         msg = EELFResourceManager.format(Msg.REBUILD_SERVER_FAILED, server.getName(), server.getId(),
 409                                 "Accessing Image Service Failed");
 410                         logger.error(msg);
 411                         metricsLogger.error(msg);
 412                         doFailure(rc, HttpStatus.FORBIDDEN_403, msg);
 413                     }
 414                     context.close();
 415                 } else {
 416                     ctx.setAttribute("REBUILD_STATUS", "CONTEXT_NOT_FOUND");
 417                 }
 418             } catch (StateException ex) {
 419                 logger.error(ex.getMessage());
 420                 ctx.setAttribute("REBUILD_STATUS", "ERROR");
 421                 doFailure(rc, HttpStatus.CONFLICT_409, ex.getMessage());
 422             } catch (RequestFailedException e) {
 423                 doFailure(rc, e.getStatus(), e.getMessage());
 424                 ctx.setAttribute("REBUILD_STATUS", "ERROR");
 425             } catch (ResourceNotFoundException e) {
 426                 msg = EELFResourceManager.format(Msg.SERVER_NOT_FOUND, e, vm_url);
 427                 ctx.setAttribute("REBUILD_STATUS", "ERROR");
 428                 logger.error(msg);
 429                 metricsLogger.error(msg);
 430                 doFailure(rc, HttpStatus.NOT_FOUND_404, msg);
 431             } catch (Exception e1) {
 432                 msg = EELFResourceManager.format(Msg.SERVER_OPERATION_EXCEPTION, e1, e1.getClass().getSimpleName(),
 433                         STOP_SERVICE.toString(), vm_url, tenantName);
 434                 ctx.setAttribute("REBUILD_STATUS", "ERROR");
 435                 logger.error(msg, e1);
 436                 metricsLogger.error(msg);
 437                 doFailure(rc, HttpStatus.INTERNAL_SERVER_ERROR_500, msg);
 438             }
 439         } catch (RequestFailedException e) {
 440             ctx.setAttribute("REBUILD_STATUS", "ERROR");
 441             doFailure(rc, e.getStatus(), e.getMessage());
 442         }
 443         return server;
 444     }
 445
 446     @Override
 447     protected ModelObject executeProviderOperation(Map<String, String> params, SvcLogicContext context)
 448             throws APPCException {
 449         setMDC(Operation.REBUILD_SERVICE.toString(), "App-C IaaS Adapter:Rebuild", ADAPTER_NAME);
 450         logOperation(Msg.REBUILDING_SERVER, params, context);
 451         setTimeForMetricsLogger();
 452         metricsLogger.info("Executing Provider Operation: Rebuild");
 453         return rebuildServer(params, context);
 454     }
 455
 456     private void setTimeForMetricsLogger() {
 457         String timestamp = LoggingUtils.generateTimestampStr(((Date) new Date()).toInstant());
 458         MDC.put(LoggingConstants.MDCKeys.BEGIN_TIMESTAMP, timestamp);
 459         MDC.put(LoggingConstants.MDCKeys.END_TIMESTAMP, timestamp);
 460         MDC.put(LoggingConstants.MDCKeys.ELAPSED_TIME, "0");
 461         MDC.put(LoggingConstants.MDCKeys.STATUS_CODE, LoggingConstants.StatusCodes.COMPLETE);
 462         MDC.put(LoggingConstants.MDCKeys.TARGET_ENTITY, "cdp");
 463         MDC.put(LoggingConstants.MDCKeys.TARGET_SERVICE_NAME, "rebuild server");
 464         MDC.put(LoggingConstants.MDCKeys.CLASS_NAME,
 465                 "org.onap.appc.adapter.iaas.provider.operation.impl.RebuildServer");
 466
 467     }
 468
 469     /**
 470      * Sets the sleep time used by thread.sleep to give "some time for OpenStack to
 471      * start processing the request".
 472      *
 473      * @param millis
 474      *            Time to sleep in milliseconds
 475      */
 476     public void setRebuildSleepTime(long millis) {
 477         this.rebuildSleepTime = millis;
 478     }
 479
 480     private boolean validateSnapshotId(String imageToUse, List<Image> snapshotList, List<Image> imageList) {
 481
 482         logger.debug("Validating snapshot-id " + imageToUse + " for the rebuild request from payload");
 483         boolean imageFound = false;
 484         // If image is empty , the validation si not required . Hence return false.
 485         // Ideally function should not be called with empty image Id
 486         if (imageToUse.isEmpty()) {
 487             return imageFound;
 488         } else {
 489             // The supplied snapshot id can be a snapshot id or an image Id. Check both
 490             // available for the vnf.
 491             // Check against snapshot id list and image list
 492             return findImageExists(snapshotList, imageToUse, "snapshotidList")
 493                     || findImageExists(imageList, imageToUse, "imageidList");
 494         }
 495     }
 496
 497     boolean findImageExists(List<Image> list, String imageToUse, String source) {
 498         boolean imageExists = false;
 499         logger.debug("Available Image-ids from :" + source + "Start\n");
 500         for (Image img : list) {
 501             String imgId = img.getId();
 502             logger.debug("Image Id - " + imgId + "\n");
 503             if (imgId.equals(imageToUse)) {
 504                 logger.debug("Image found in available " + source);
 505                 imageExists = true;
 506                 break;
 507             }
 508         }
 509         return imageExists;
 510
 511     }
 512 }