Task progress view UI

5 files changed, 186 insertions, 128 deletions

diff --git a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/resources/GlusterServersResource.java b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/resources/GlusterServersResource.java
index 1999762a..e824fee7 100644
--- a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/resources/GlusterServersResource.java
+++ b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/resources/GlusterServersResource.java
@@ -457,21 +457,15 @@ public class GlusterServersResource extends AbstractServersResource {
 			return badRequestResponse("Disk name must not be empty!");
 		}
 
-		TaskResponse taskResponse = new TaskResponse();
 		InitializeDiskTask initializeTask = new InitializeDiskTask(diskName, serverName);
-		String taskId = null;
 		try {
-			TaskInfo taskInfo = initializeTask.start();
-			taskId = taskInfo.getId();
-			if (taskInfo.isSuccess()) {
-				taskResource.addTask(initializeTask);
-			}
-			taskResponse.setData(taskInfo);
-			taskResponse.setStatus(new Status(Status.STATUS_CODE_SUCCESS, ""));
+			initializeTask.start();
+			taskResource.addTask(initializeTask);
+			return acceptedResponse(RESTConstants.RESOURCE_PATH_CLUSTERS, clusterName, RESOURCE_TASKS,
+					initializeTask.getId());
 		} catch (ConnectionException e) {
 			return errorResponse(e.getMessage());
 		}
-		return acceptedResponse(RESTConstants.RESOURCE_PATH_CLUSTERS, clusterName, RESOURCE_TASKS, taskId);
 	}
 
 	private void setGlusterUtil(GlusterUtil glusterUtil) {
diff --git a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/resources/TasksResource.java b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/resources/TasksResource.java
index 4bf1c0cf..44d86b1b 100644
--- a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/resources/TasksResource.java
+++ b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/resources/TasksResource.java
@@ -20,9 +20,9 @@
  */
 package com.gluster.storage.management.server.resources;
 
+import static com.gluster.storage.management.core.constants.RESTConstants.FORM_PARAM_OPERATION;
 import static com.gluster.storage.management.core.constants.RESTConstants.PATH_PARAM_CLUSTER_NAME;
 import static com.gluster.storage.management.core.constants.RESTConstants.PATH_PARAM_TASK_ID;
-import static com.gluster.storage.management.core.constants.RESTConstants.FORM_PARAM_OPERATION;
 import static com.gluster.storage.management.core.constants.RESTConstants.RESOURCE_PATH_CLUSTERS;
 import static com.gluster.storage.management.core.constants.RESTConstants.RESOURCE_TASKS;
 
@@ -40,26 +40,25 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
 
 import com.gluster.storage.management.core.constants.RESTConstants;
 import com.gluster.storage.management.core.exceptions.GlusterRuntimeException;
-import com.gluster.storage.management.core.model.Status;
+import com.gluster.storage.management.core.exceptions.GlusterValidationException;
 import com.gluster.storage.management.core.model.Task;
 import com.gluster.storage.management.core.model.TaskInfo;
-import com.gluster.storage.management.core.response.TaskListResponse;
-import com.gluster.storage.management.core.response.TaskResponse;
+import com.gluster.storage.management.core.response.TaskInfoListResponse;
 import com.sun.jersey.spi.resource.Singleton;
 
 @Path(RESOURCE_PATH_CLUSTERS + "/{" + PATH_PARAM_CLUSTER_NAME + "}/" + RESOURCE_TASKS)
 @Singleton
-public class TasksResource {
+public class TasksResource extends AbstractResource {
 	private Map<String, Task> tasksMap = new HashMap<String, Task>();
 
 	public TasksResource() {
 	}
 
-	
-	public void addTask(Task task) { // task should be one of MuigrateDiskTask, FormatDiskTask, etc
+	public void addTask(Task task) {
 		tasksMap.put(task.getId(), task);
 	}
 
@@ -70,18 +69,11 @@ public class TasksResource {
 	public List<TaskInfo> getAllTasksInfo() {
 		List<TaskInfo> allTasksInfo = new ArrayList<TaskInfo>();
 		for (Map.Entry<String, Task> entry : tasksMap.entrySet()) {
-			allTasksInfo.add(entry.getValue().getTaskInfo());
+			checkTaskStatus(entry.getKey());
+			allTasksInfo.add(entry.getValue().getTaskInfo()); // TaskInfo with latest status 
 		}
 		return allTasksInfo;
 	}
-	
-	public List<Task> getAllTasks() {
-		List<Task> allTasks = new ArrayList<Task>();
-		for (Map.Entry<String, Task> entry : tasksMap.entrySet()) {
-			allTasks.add(entry.getValue());
-		}
-		return allTasks;
-	}
 
 	public Task getTask(String taskId) {
 		for (Map.Entry<String, Task> entry : tasksMap.entrySet()) {
@@ -91,63 +83,95 @@ public class TasksResource {
 		}
 		return null;
 	}
-
+	
 	@GET
 	@Produces(MediaType.APPLICATION_XML)
-	public TaskListResponse getTasks() {
-		TaskListResponse taskListResponse = new TaskListResponse();
+	public Response getTasks() {
+		try {
+			return okResponse(new TaskInfoListResponse(getAllTasksInfo()), MediaType.APPLICATION_XML);
+		} catch (GlusterRuntimeException e) {
+			return errorResponse(e.getMessage());
+		}
+	}
+	
+	@GET
+	@Path("/{" + PATH_PARAM_TASK_ID + "}")
+	@Produces(MediaType.APPLICATION_XML)
+	public Response getTaskStatus( @PathParam(PATH_PARAM_TASK_ID) String taskId) {
 		try {
-			taskListResponse.setData(getAllTasksInfo());
-			taskListResponse.setStatus(new Status(Status.STATUS_CODE_SUCCESS, ""));
+			Task task = checkTaskStatus(taskId);
+			return okResponse(task.getTaskInfo(), MediaType.APPLICATION_XML);
 		} catch (GlusterRuntimeException e) {
-			taskListResponse.setStatus(new Status(e));
+			return errorResponse(e.getMessage());
 		}
-		return taskListResponse;
+	}
+
+	private Task checkTaskStatus(String taskId) {
+		Task task = getTask(taskId);
+		task.getTaskInfo().setStatus(task.checkStatus());
+		return task;
 	}
 
 	@PUT
 	@Path("/{" + PATH_PARAM_TASK_ID + "}")
 	@Produces(MediaType.APPLICATION_XML)
-	public TaskResponse performTask(@PathParam(PATH_PARAM_TASK_ID) String taskId,
-			@FormParam(FORM_PARAM_OPERATION) String taskOperation) {
+	public Response performTask(@PathParam(PATH_PARAM_CLUSTER_NAME) String clusterName,
+			@PathParam(PATH_PARAM_TASK_ID) String taskId, @FormParam(FORM_PARAM_OPERATION) String taskOperation) {
 		Task task = getTask(taskId);
-		TaskInfo taskInfo = null;
-		TaskResponse taskResponse = new TaskResponse();
-
+		
 		try {
 			if (taskOperation.equals(RESTConstants.TASK_RESUME)) {
-				taskInfo = task.resume();
-			}
-			if (taskOperation.equals(RESTConstants.TASK_PAUSE)) {
-				taskInfo = task.pause();
+				task.resume();
+			} else if (taskOperation.equals(RESTConstants.TASK_PAUSE)) {
+				task.pause();
+			} else if (taskOperation.equals(RESTConstants.TASK_STOP)) {
+				task.stop();
+			} else if(taskOperation.equals(RESTConstants.TASK_COMMIT)) {
+				task.commit();
 			}
-			if (taskOperation.equals(RESTConstants.TASK_STOP)) {
-				taskInfo = task.stop();
-			}
-			taskResponse.setData(taskInfo);
-			taskResponse.setStatus(new Status(Status.STATUS_CODE_SUCCESS, ""));
+			// updateTask(taskId, taskOperation);
+			return (Response) acceptedResponse(RESTConstants.RESOURCE_PATH_CLUSTERS, clusterName, RESOURCE_TASKS,
+					taskId);
+		} catch(GlusterValidationException ve) {
+			return badRequestResponse(ve.getMessage());
 		} catch (GlusterRuntimeException e) {
-			taskResponse.setStatus(new Status(e));
+			return errorResponse(e.getMessage());
 		}
-		return taskResponse;
 	}
 
 	@DELETE
 	@Path("/{" + PATH_PARAM_TASK_ID + "}")
 	@Produces(MediaType.APPLICATION_XML)
-	public TaskResponse deleteTask(@PathParam(PATH_PARAM_TASK_ID) String taskId,
+	public Response deleteTask(@PathParam(PATH_PARAM_TASK_ID) String taskId,
 			@QueryParam(FORM_PARAM_OPERATION) String taskOperation) {
-		TaskResponse taskResponse = new TaskResponse();
 		Task task = getTask(taskId);
 		if (task == null) {
-			taskResponse.setStatus( new Status(Status.STATUS_CODE_FAILURE, "No such task " + taskId + "is found ")); 
+			return notFoundResponse("Task [" + taskId + "] not found!");
 		}
-		if (taskOperation.equals("delete")) {
-			removeTask(task);
-			taskResponse.setStatus(new Status(Status.STATUS_CODE_SUCCESS, "Task [" + taskId
-						+ "] removed successfully"));
-					}
-		return null;
-	}
+		
+		if(taskOperation == null || taskOperation.isEmpty()) {
+			return badRequestResponse("Parameter [" + FORM_PARAM_OPERATION + "] is missing in request!");
+		}
+		
+		if(!taskOperation.equals(RESTConstants.TASK_STOP) && !taskOperation.equals(RESTConstants.TASK_DELETE)) {
+			return badRequestResponse("Invalid value [" + taskOperation + "] for parameter [" + FORM_PARAM_OPERATION
+					+ "]");
+		}
+		
+		try {
+			if (taskOperation.equals(RESTConstants.TASK_STOP)) {
+				task.stop();
+				// On successfully stopping the task, we can delete (forget) it as it is no more useful
+				taskOperation = RESTConstants.TASK_DELETE;
+			}
 
+			if (taskOperation.equals(RESTConstants.TASK_DELETE)) {
+				removeTask(task);
+			}
+			
+			return noContentResponse();
+		} catch (Exception e) {
+			return errorResponse(e.getMessage());
+		}
+	}
 }
diff --git a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/tasks/InitializeDiskTask.java b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/tasks/InitializeDiskTask.java
index d29d859b..018cd301 100644
--- a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/tasks/InitializeDiskTask.java
+++ b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/tasks/InitializeDiskTask.java
@@ -23,6 +23,7 @@ package com.gluster.storage.management.server.tasks;
 import com.gluster.storage.management.core.model.Status;
 import com.gluster.storage.management.core.model.Task;
 import com.gluster.storage.management.core.model.TaskInfo;
+import com.gluster.storage.management.core.model.TaskInfo.TASK_TYPE;
 import com.gluster.storage.management.core.model.TaskStatus;
 import com.gluster.storage.management.server.utils.SshUtil;
 
@@ -36,13 +37,10 @@ public class InitializeDiskTask extends Task {
 	private SshUtil sshUtil = new SshUtil();
 
 	public InitializeDiskTask( String serverName, String diskName) {
-		super(TASK_TYPE.DISK_FORMAT, diskName);
+		super(TASK_TYPE.DISK_FORMAT, diskName, "Initialize disk " + serverName + ":" + diskName, false, false, false);
 
-		getTaskInfo().setCanPause(false);
-		getTaskInfo().setCanStop(false);
 		setServerName(serverName);
 		setDiskName(diskName);
-		setTaskDescription();
 	}
 
 	public InitializeDiskTask(TaskInfo info) {
@@ -51,25 +49,27 @@ public class InitializeDiskTask extends Task {
 
 	@Override
 	public String getId() {
-		return getTaskInfo().getId();
+		return taskInfo.getType() + "-" + serverName + ":" + diskName;
 	}
 
 	@Override
-	public TaskInfo resume() {
+	public void resume() {
 		getTaskInfo().setStatus( new TaskStatus( new Status(Status.STATUS_CODE_FAILURE, "Can not resume disk initialization")));
-		return getTaskInfo();
 	}
 
 	@Override
-	public TaskInfo stop() {
+	public void stop() {
 		getTaskInfo().setStatus( new TaskStatus( new Status(Status.STATUS_CODE_FAILURE, "Can not stop disk initialization")));
-		return getTaskInfo();
 	}
 
 	@Override
-	public TaskInfo pause() {
+	public void pause() {
 		getTaskInfo().setStatus( new TaskStatus( new Status(Status.STATUS_CODE_FAILURE, "Can not suspend disk initialization")));
-		return getTaskInfo();
+	}
+	
+	@Override
+	public void commit() {
+		// TODO Auto-generated method stub
 	}
 
 	@Override
@@ -83,25 +83,16 @@ public class InitializeDiskTask extends Task {
 	}
 
 	@Override
-	public TaskInfo start() {
+	public void start() {
 		getTaskInfo().setStatus(
 				new TaskStatus(new Status(sshUtil.executeRemote(getServerName(), INITIALIZE_DISK_SCRIPT + " "
 						+ getDiskName()))));
-		return getTaskInfo();
-	}
-
-	@Override
-	public TaskInfo status() {
-		getTaskInfo().setStatus(
-
-				new TaskStatus(new Status(sshUtil.executeRemote(getServerName(), INITIALIZE_DISK_STATUS_SCRIPT + " "
-						+ getDiskName()))));
-		return getTaskInfo();
 	}
 
 	@Override
-	public void setTaskDescription() {
-		getTaskInfo().setDescription("Formating disk of " + getServerName() + ":" + getDiskName());
+	public TaskStatus checkStatus() {
+		return new TaskStatus(new Status(sshUtil.executeRemote(getServerName(), INITIALIZE_DISK_STATUS_SCRIPT + " "
+				+ getDiskName())));
 	}
 
 	public void setDiskName(String diskName) {
diff --git a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/tasks/MigrateDiskTask.java b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/tasks/MigrateDiskTask.java
index df637ab1..0b1b67e4 100644
--- a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/tasks/MigrateDiskTask.java
+++ b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/tasks/MigrateDiskTask.java
@@ -20,12 +20,13 @@
  */
 package com.gluster.storage.management.server.tasks;
 
-import org.springframework.beans.factory.annotation.Autowired;
-
+import com.gluster.storage.management.core.exceptions.GlusterRuntimeException;
 import com.gluster.storage.management.core.model.Status;
 import com.gluster.storage.management.core.model.Task;
 import com.gluster.storage.management.core.model.TaskInfo;
+import com.gluster.storage.management.core.model.TaskInfo.TASK_TYPE;
 import com.gluster.storage.management.core.model.TaskStatus;
+import com.gluster.storage.management.core.utils.ProcessResult;
 import com.gluster.storage.management.server.utils.SshUtil;
 
 public class MigrateDiskTask extends Task {
@@ -60,67 +61,113 @@ public class MigrateDiskTask extends Task {
 		this.autoCommit = autoCommit;
 	}
 
-	public MigrateDiskTask(TASK_TYPE type, String volumeName, String fromBrick, String toBrick) {
-		super(type, volumeName);
+	public MigrateDiskTask(String volumeName, String fromBrick, String toBrick) {
+		super(TASK_TYPE.BRICK_MIGRATE, volumeName, "Brick Migration on volume [" + volumeName + "] from [" + fromBrick
+				+ "] to [" + toBrick + "]", true, true, true);
 		setFromBrick(fromBrick);
 		setToBrick(toBrick);
-		setTaskDescription();
-		getTaskInfo().setCanPause(true);
-		getTaskInfo().setCanStop(true);
 	}
 
 	public MigrateDiskTask(TaskInfo info) {
 		super(info);
-		setTaskDescription();
 	}
 
 	@Override
 	public String getId() {
-		return getTaskInfo().getId();
+		return taskInfo.getType() + "-" + taskInfo.getReference() + "-" + fromBrick + "-" + toBrick;
 	}
 
 	@Override
-	public TaskInfo start() {
-		getTaskInfo().setStatus(
-				new TaskStatus(new Status(sshUtil.executeRemote(getOnlineServer(), "gluster volume replace-brick "
-						+ getTaskInfo().getReference() + " " + getFromBrick() + " " + getToBrick() + " start" ) )));
-		return getTaskInfo();
+	public void start() {
+		String command = "gluster volume replace-brick " + getTaskInfo().getReference() + " " + getFromBrick() + " "
+				+ getToBrick() + " start";
+		ProcessResult processResult = sshUtil.executeRemote(serverName, command);
+		TaskStatus taskStatus = new TaskStatus();
+		if (processResult.isSuccess()) {
+			if (processResult.getOutput().trim().matches(".*started successfully$")) {
+				taskStatus.setCode(Status.STATUS_CODE_RUNNING);
+			} else {
+				taskStatus.setCode(Status.STATUS_CODE_FAILURE);
+			}
+		} else {
+			taskStatus.setCode(Status.STATUS_CODE_FAILURE);
+		}
+		taskStatus.setMessage(processResult.getOutput()); // Common
+		getTaskInfo().setStatus(taskStatus);
 	}
 
+	
+
 	@Override
-	public TaskInfo resume() {
-		return start();
+	public void pause() {
+		String command = "gluster volume replace-brick " + getTaskInfo().getReference() + " " + getFromBrick() + " " + getToBrick()
+		+ " pause";
+
+		ProcessResult processResult = sshUtil.executeRemote(serverName, command);
+		TaskStatus taskStatus = new TaskStatus();
+		if (processResult.isSuccess()) {
+			if (processResult.getOutput().matches("*pause")) {
+				taskStatus.setCode(Status.STATUS_CODE_PAUSE);
+			} else {
+				taskStatus.setCode(Status.STATUS_CODE_FAILURE);
+			}
+		} else {
+			taskStatus.setCode(Status.STATUS_CODE_FAILURE);
+		}
+		taskStatus.setMessage(processResult.getOutput()); // Common
+		getTaskInfo().setStatus(taskStatus);
 	}
-
+	
+	
 	@Override
-	public TaskInfo stop() {
-		getTaskInfo().setStatus(
-				new TaskStatus(new Status(sshUtil.executeRemote(getOnlineServer(), "gluster volume replace-brick "
-						+ getTaskInfo().getReference() + " " + getFromBrick() + " " + getToBrick() + " abort" ) )));
-		return getTaskInfo();
+	public void resume() {
+		start();
 	}
-
+	
 	@Override
-	public TaskInfo pause() {
-		getTaskInfo().setStatus(
-				new TaskStatus(new Status(sshUtil.executeRemote(getOnlineServer(), "gluster volume replace-brick "
-						+ getTaskInfo().getReference() + " " + getFromBrick() + " " + getToBrick() + " pause" ) )));
-		return getTaskInfo();
-		
+	public void commit() {
+		// TODO Auto-generated method stub
 	}
 
-	
 	@Override
-	public void setTaskDescription() {
-		TaskInfo taskInfo = getTaskInfo();
-		getTaskInfo().setDescription(
-				getTypeStr() + " on volume [" + taskInfo.getReference() + "] from [" + getFromBrick()
-						+ "] to [" + getToBrick() + "]");
+	public void stop() {
+		String command = "gluster volume replace-brick " + getTaskInfo().getReference() + " " + getFromBrick() + " " + getToBrick()
+		+ " abort";
+		
+		ProcessResult processResult = sshUtil.executeRemote(serverName, command);
+		TaskStatus taskStatus = new TaskStatus();
+		if (processResult.isSuccess()) {
+			if (processResult.getOutput().trim().matches(".*aborted successfully$")) {
+				taskStatus.setCode(Status.STATUS_CODE_SUCCESS);
+			} else {
+				taskStatus.setCode(Status.STATUS_CODE_FAILURE);
+			}
+		} else {
+			taskStatus.setCode(Status.STATUS_CODE_FAILURE);
+		}
+		taskStatus.setMessage(processResult.getOutput()); // Common
+		getTaskInfo().setStatus(taskStatus);
 	}
 
 	
 	@Override
-	public TaskInfo status() {
-		return getTaskInfo();
+	public TaskStatus checkStatus() {
+		String command = "gluster volume replace-brick " + getTaskInfo().getReference() + " " + getFromBrick() + " "
+				+ getToBrick() + " status";
+		ProcessResult processResult = sshUtil.executeRemote(serverName, command);
+		TaskStatus taskStatus = new TaskStatus();
+		if (processResult.isSuccess()) {
+			if (processResult.getOutput().trim().matches("^Number of files migrated.*Migration complete$")) {
+				taskStatus.setCode(Status.STATUS_CODE_SUCCESS);
+			} else if (	processResult.getOutput().trim().matches("^Number of files migrated.*Current file=.*")) {
+				taskStatus.setCode(Status.STATUS_CODE_RUNNING);
+			} else {
+				taskStatus.setCode(Status.STATUS_CODE_FAILURE);
+			}
+		} else {
+			taskStatus.setCode(Status.STATUS_CODE_FAILURE);
+		}
+		taskStatus.setMessage(processResult.getOutput()); // Common
+		return taskStatus;
 	}
 }
diff --git a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/utils/GlusterUtil.java b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/utils/GlusterUtil.java
index 670ffb5c..dc95f50a 100644
--- a/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/utils/GlusterUtil.java
+++ b/src/com.gluster.storage.management.server/src/com/gluster/storage/management/server/utils/GlusterUtil.java
@@ -36,8 +36,7 @@ import com.gluster.storage.management.core.model.Brick.BRICK_STATUS;
 import com.gluster.storage.management.core.model.GlusterServer;
 import com.gluster.storage.management.core.model.GlusterServer.SERVER_STATUS;
 import com.gluster.storage.management.core.model.Status;
-import com.gluster.storage.management.core.model.Task.TASK_TYPE;
-import com.gluster.storage.management.core.model.TaskInfo;
+import com.gluster.storage.management.core.model.TaskInfo.TASK_TYPE;
 import com.gluster.storage.management.core.model.Volume;
 import com.gluster.storage.management.core.model.Volume.TRANSPORT_TYPE;
 import com.gluster.storage.management.core.model.Volume.VOLUME_STATUS;
@@ -539,17 +538,20 @@ public class GlusterUtil {
 	
 	public String migrateBrickStart(String volumeName, String fromBrick, String toBrick, Boolean autoCommit,
 			String knownServer) {
-		MigrateDiskTask migrateDiskTask = new MigrateDiskTask(TASK_TYPE.BRICK_MIGRATE, volumeName, fromBrick, toBrick);
+		MigrateDiskTask migrateDiskTask = new MigrateDiskTask(volumeName, fromBrick, toBrick);
 		migrateDiskTask.setOnlineServer(knownServer);
 		migrateDiskTask.setAutoCommit(autoCommit);
-
-		TaskInfo taskInfo = migrateDiskTask.start();
-		if (taskInfo.isSuccess()) {
+		migrateDiskTask.start();
+		int status = migrateDiskTask.getTaskInfo().getStatus().getCode();
+		if (status != Status.STATUS_CODE_FAILURE ) {
+			TasksResource tasksResource = new TasksResource();
 			taskResource.addTask(migrateDiskTask);
+		} else {
+			throw new GlusterRuntimeException( migrateDiskTask.getTaskInfo().getStatus().getMessage());
 		}
-		
-		return taskInfo.getId();
+		return migrateDiskTask.getId();
 	}
+	
 
 	public Status removeBricks(String volumeName, List<String> bricks, String knownServer) {
 		StringBuilder command = new StringBuilder("gluster --mode=script volume remove-brick " + volumeName);