kvm: Fix RBD primary storage host port null error (#4565)

Add RBD main storage through UI, it will fail when there is no host port parameter;
Because when we created the pool, we did not add the port target in the xml

Author: div8cn

plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtDomainXMLParser.java

@@ -84,7 +84,11 @@ public boolean parseDomainXML(String domXML) {
                     String authUserName = getAttrValue("auth", "username", disk);
                     String poolUuid = getAttrValue("secret", "uuid", disk);
                     String host = getAttrValue("host", "name", disk);
-                    int port = Integer.parseInt(getAttrValue("host", "port", disk));
+                    int port = 0;
+                    String xmlPort = getAttrValue("host", "port", disk);
+                    if (StringUtils.isNotBlank(xmlPort)) {
+                        port = Integer.parseInt(xmlPort);
+                    }
                     String diskLabel = getAttrValue("target", "dev", disk);
                     String bus = getAttrValue("target", "bus", disk);
 

plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtStoragePoolXMLParser.java

@@ -23,6 +23,7 @@
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;
 
+import org.apache.commons.lang.StringUtils;
 import org.apache.log4j.Logger;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
@@ -55,7 +56,11 @@ public LibvirtStoragePoolDef parseStoragePoolXML(String poolXML) {
             String format = getAttrValue("format", "type", source);
 
             if (type.equalsIgnoreCase("rbd")) {
-                int port = Integer.parseInt(getAttrValue("host", "port", source));
+                int port = 0;
+                String xmlPort = getAttrValue("host", "port", source);
+                if (StringUtils.isNotBlank(xmlPort)) {
+                    port = Integer.parseInt(xmlPort);
+                }
                 String pool = getTagValue("name", source);
 
                 Element auth = (Element)source.getElementsByTagName("auth").item(0);