[GitHub] rafaelweingartner commented on a change in pull request #2379: CLOUDSTACK-10146: Bypass Secondary Storage for KVM templates

[GitBox <gi...@apache.org>]

rafaelweingartner commented on a change in pull request #2379: CLOUDSTACK-10146: Bypass Secondary Storage for KVM templates
URL: https://github.com/apache/cloudstack/pull/2379#discussion_r159627375
 
 

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 File path: agent/src/com/cloud/agent/direct/download/DirectTemplateDownloaderImpl.java
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 @@ -0,0 +1,193 @@
+//
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+//
+package com.cloud.agent.direct.download;
+
+import com.cloud.utils.exception.CloudRuntimeException;
+import com.cloud.utils.script.Script;
+import org.apache.cloudstack.utils.security.ChecksumValue;
+import org.apache.commons.lang.StringUtils;
+
+import java.io.File;
+import java.util.UUID;
+
+public abstract class DirectTemplateDownloaderImpl implements DirectTemplateDownloader {
+
+    private String url;
+    private String destPoolPath;
+    private Long templateId;
+    private String downloadedFilePath;
+    private String installPath;
+    private String checksum;
+
+    protected DirectTemplateDownloaderImpl(final String url, final String destPoolPath, final Long templateId, final String checksum) {
+        this.url = url;
+        this.destPoolPath = destPoolPath;
+        this.templateId = templateId;
+        this.checksum = checksum;
+    }
+
+    private static String directDownloadDir = "template";
+
+    /**
+     * Return direct download temporary path to download template
+     * @param templateId
+     * @return
+     */
+    protected static String getDirectDownloadTempPath(Long templateId) {
+        String templateIdAsString = String.valueOf(templateId);
+        return directDownloadDir + File.separator + templateIdAsString.substring(0,1) +
+                File.separator + templateIdAsString;
+    }
+
+    /**
+     * Create folder on path if it does not exist
+     * @param path
+     */
+    protected void createFolder(String path) {
+        File dir = new File(path);
+        if (!dir.exists()) {
+            dir.mkdirs();
+        }
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public String getDestPoolPath() {
+        return destPoolPath;
+    }
+
+    public Long getTemplateId() {
+        return templateId;
+    }
+
+    public String getDownloadedFilePath() {
+        return downloadedFilePath;
+    }
+
+    public void setDownloadedFilePath(String filePath) {
+        this.downloadedFilePath = filePath;
+    }
+
+    /**
+     * Return filename from url
+     * @return
+     */
+    public String getFileNameFromUrl() {
+        String[] urlParts = url.split("/");
+        return urlParts[urlParts.length - 1];
+    }
+
+    /**
+     * Checks if downloaded template is extractable
+     * @return true if it should be extracted, false if not
+     */
+    private boolean isTemplateExtractable() {
+        String type = Script.runSimpleBashScript("file " + downloadedFilePath + " | awk -F' ' '{print $2}'");
+        return type.equalsIgnoreCase("bzip2") || type.equalsIgnoreCase("gzip") || type.equalsIgnoreCase("zip");
+    }
+
+    @Override
+    public boolean extractAndInstallDownloadedTemplate() {
+        installPath = UUID.randomUUID().toString();
+        if (isTemplateExtractable()) {
+            extractDownloadedTemplate();
+        } else {
+            Script.runSimpleBashScript("mv " + downloadedFilePath + " " + getInstallFullPath());
+        }
+        return true;
+    }
+
+    /**
+     * Return install full path
+     * @return
+     */
+    private String getInstallFullPath() {
+        return destPoolPath + File.separator + installPath;
+    }
+
+    /**
+     * Return extract command to execute given downloaded file
+     * @return
+     */
+    private String getExtractCommandForDownloadedFile() {
+        if (downloadedFilePath.endsWith(".zip")) {
+            return "unzip -p " + downloadedFilePath + " | cat > " + getInstallFullPath();
+        } else if (downloadedFilePath.endsWith(".bz2")) {
+            return "bunzip2 -c " + downloadedFilePath + " > " + getInstallFullPath();
+        } else if (downloadedFilePath.endsWith(".gz")) {
+            return "gunzip -c " + downloadedFilePath + " > " + getInstallFullPath();
+        } else {
+            throw new CloudRuntimeException("Unable to extract template " + templateId + " on " + downloadedFilePath);
+        }
+    }
+
+    /**
+     * Extract downloaded template into installPath, remove compressed file
+     */
+    private void extractDownloadedTemplate() {
+        String extractCommand = getExtractCommandForDownloadedFile();
+        Script.runSimpleBashScript(extractCommand);
+        Script.runSimpleBashScript("rm -f " + downloadedFilePath);
+    }
+
+    @Override
+    public DirectTemplateInformation getTemplateInformation() {
+        String sizeResult = Script.runSimpleBashScript("ls -als " + getInstallFullPath() + " | awk '{print $1}'");
+        long size = Long.parseLong(sizeResult);
+        return new DirectTemplateInformation(installPath, size, checksum);
+    }
+
+    /**
+     * Return checksum command from algorithm
+     * @param algorithm
 
 Review comment:
   Empty @Return and @Param

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