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