kvm: fix vm deployment with direct-download iso (apache#11532)

Author: shwstppr

plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/storage/KVMStorageProcessor.java

@@ -101,9 +101,8 @@
 import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.builder.ToStringBuilder;
 import org.apache.commons.lang3.builder.ToStringStyle;
-import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.LogManager;
-
+import org.apache.logging.log4j.Logger;
 import org.libvirt.Connect;
 import org.libvirt.Domain;
 import org.libvirt.DomainInfo;
@@ -3154,7 +3153,9 @@ public Answer handleDownloadTemplateToPrimaryStorage(DirectDownloadCommand cmd)
             if (template != null) {
                 templatePath = template.getPath();
             }
-            if (StringUtils.isEmpty(templatePath)) {
+            if (ImageFormat.ISO.equals(cmd.getFormat())) {
+                logger.debug("Skipping template validations as image format is {}", cmd.getFormat());
+            } else if (StringUtils.isEmpty(templatePath)) {
                 logger.warn("Skipped validation whether downloaded file is QCOW2 for template {}, due to downloaded template path is empty", template.getName());
             } else if (!new File(templatePath).exists()) {
                 logger.warn("Skipped validation whether downloaded file is QCOW2 for template {}, due to downloaded template path is not valid: {}", template.getName(), templatePath);