Fix issue with multiple KVM Host entries in host table (#12589)

Author: nvazquez

engine/components-api/src/main/java/com/cloud/resource/ResourceManager.java

@@ -154,6 +154,8 @@ public interface ResourceManager extends ResourceService, Configurable {
 
     public HostVO findHostByGuid(String guid);
 
+    HostVO findHostByGuidPrefix(String guid);
+
     public HostVO findHostByName(String name);
 
     HostStats getHostStatistics(Host host);

server/src/main/java/com/cloud/resource/ResourceManagerImpl.java

@@ -2261,15 +2261,26 @@ private boolean checkCIDR(final HostPodVO pod, final String serverPrivateIP, fin
     private HostVO getNewHost(StartupCommand[] startupCommands) {
         StartupCommand startupCommand = startupCommands[0];
 
-        HostVO host = findHostByGuid(startupCommand.getGuid());
+        String fullGuid = startupCommand.getGuid();
+        logger.debug(String.format("Trying to find Host by guid %s", fullGuid));
+        HostVO host = findHostByGuid(fullGuid);
 
         if (host != null) {
+            logger.debug(String.format("Found Host by guid %s: %s", fullGuid, host));
             return host;
         }
 
-        host = findHostByGuid(startupCommand.getGuidWithoutResource());
+        String guidPrefix = startupCommand.getGuidWithoutResource();
+        logger.debug(String.format("Trying to find Host by guid prefix %s", guidPrefix));
+        host = findHostByGuidPrefix(guidPrefix);
 
-        return host; // even when host == null!
+        if (host != null) {
+            logger.debug(String.format("Found Host by guid prefix %s: %s", guidPrefix, host));
+            return host;
+        }
+
+        logger.debug(String.format("Could not find Host by guid %s", fullGuid));
+        return null;
     }
 
     protected HostVO createHostVO(final StartupCommand[] cmds, final ServerResource resource, final Map<String, String> details, List<String> hostTags,
@@ -3296,13 +3307,23 @@ public List<HypervisorType> listAvailHypervisorInZone(final Long zoneId) {
     public HostVO findHostByGuid(final String guid) {
         final QueryBuilder<HostVO> sc = QueryBuilder.create(HostVO.class);
         sc.and(sc.entity().getGuid(), Op.EQ, guid);
+        sc.and(sc.entity().getRemoved(), Op.NULL);
+        return sc.find();
+    }
+
+    @Override
+    public HostVO findHostByGuidPrefix(String guid) {
+        final QueryBuilder<HostVO> sc = QueryBuilder.create(HostVO.class);
+        sc.and(sc.entity().getGuid(), Op.LIKE, guid + "%");
+        sc.and(sc.entity().getRemoved(), Op.NULL);
         return sc.find();
     }
 
     @Override
     public HostVO findHostByName(final String name) {
         final QueryBuilder<HostVO> sc = QueryBuilder.create(HostVO.class);
         sc.and(sc.entity().getName(), Op.EQ, name);
+        sc.and(sc.entity().getRemoved(), Op.NULL);
         return sc.find();
     }
 

server/src/test/java/com/cloud/resource/MockResourceManagerImpl.java

@@ -460,6 +460,11 @@ public HostVO findHostByGuid(final String guid) {
         return null;
     }
 
+    @Override
+    public HostVO findHostByGuidPrefix(String guid) {
+        return null;
+    }
+
     /* (non-Javadoc)
      * @see com.cloud.resource.ResourceManager#findHostByName(java.lang.String)
      */