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From bhais...@apache.org
Subject git commit: updated refs/heads/4.5 to 7a1cb28
Date Sun, 03 May 2015 13:15:50 GMT
Repository: cloudstack
Updated Branches:
  refs/heads/4.5 8f25be7c0 -> 7a1cb28c9


server: Introduce Unknown Status to be used in AbstractInvestigatorImpl

The PR #211 introduced changes where the abstract investigator testIpAddress()
would return other Status, which previously only returned null, Up or Down. In
this patch we introduce a new Status "Unknown" that replaces null's semantics.

The important changes #211 introduced was the debugging statements as semantically
the changes would work same as the consumers of testIpAddress() method only used
if returned values were Up or Down and in other cases (null, Alert etc) it would
simply continue to loop through the resources being investigated.

Keeping the debug logs, this commit only replaces the previously returned null
values with Status.Unknown and fixed the debug statements to reflect the same.
In case of trapped exceptions too, we return Unknown status but log the exception
we trapped.

server: add null assertions and remove dead code with testIpAddress usage

This closes #222

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>


Project: http://git-wip-us.apache.org/repos/asf/cloudstack/repo
Commit: http://git-wip-us.apache.org/repos/asf/cloudstack/commit/7a1cb28c
Tree: http://git-wip-us.apache.org/repos/asf/cloudstack/tree/7a1cb28c
Diff: http://git-wip-us.apache.org/repos/asf/cloudstack/diff/7a1cb28c

Branch: refs/heads/4.5
Commit: 7a1cb28c9f548ac185dcb7c59eb2fadb7d550718
Parents: 8f25be7
Author: Rohit Yadav <rohit.yadav@shapeblue.com>
Authored: Fri May 1 16:03:51 2015 +0200
Committer: Rohit Yadav <rohit.yadav@shapeblue.com>
Committed: Sun May 3 15:15:29 2015 +0200

----------------------------------------------------------------------
 api/src/com/cloud/host/Status.java                 |  3 ++-
 .../src/com/cloud/ha/AbstractInvestigatorImpl.java | 17 +++++++++--------
 .../cloud/ha/ManagementIPSystemVMInvestigator.java |  9 ++++-----
 .../src/com/cloud/ha/UserVmDomRInvestigator.java   |  8 +++-----
 4 files changed, 18 insertions(+), 19 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/cloudstack/blob/7a1cb28c/api/src/com/cloud/host/Status.java
----------------------------------------------------------------------
diff --git a/api/src/com/cloud/host/Status.java b/api/src/com/cloud/host/Status.java
index 732a066..73e6cc9 100755
--- a/api/src/com/cloud/host/Status.java
+++ b/api/src/com/cloud/host/Status.java
@@ -31,7 +31,8 @@ public enum Status {
     Alert(true, true, true),
     Removed(true, false, true),
     Error(true, false, true),
-    Rebalancing(true, false, true);
+    Rebalancing(true, false, true),
+    Unknown(false, false, false); // null
 
     private final boolean updateManagementServer;
     private final boolean checkManagementServer;

http://git-wip-us.apache.org/repos/asf/cloudstack/blob/7a1cb28c/server/src/com/cloud/ha/AbstractInvestigatorImpl.java
----------------------------------------------------------------------
diff --git a/server/src/com/cloud/ha/AbstractInvestigatorImpl.java b/server/src/com/cloud/ha/AbstractInvestigatorImpl.java
index b222386..147cecd 100755
--- a/server/src/com/cloud/ha/AbstractInvestigatorImpl.java
+++ b/server/src/com/cloud/ha/AbstractInvestigatorImpl.java
@@ -85,14 +85,15 @@ public abstract class AbstractInvestigatorImpl extends AdapterBase implements
In
         return hostIds;
     }
 
+    // Method only returns Status.Up, Status.Down and Status.Unknown
     protected Status testIpAddress(Long hostId, String testHostIp) {
         try {
             Answer pingTestAnswer = _agentMgr.send(hostId, new PingTestCommand(testHostIp));
             if (pingTestAnswer == null) {
                 if (s_logger.isDebugEnabled()) {
-                    s_logger.debug("host (" + testHostIp + ") returns null answer");
+                    s_logger.debug("host (" + testHostIp + ") returns Unknown (null) answer");
                 }
-                return Status.Alert;
+                return Status.Unknown;
             }
 
             if (pingTestAnswer.getResult()) {
@@ -103,20 +104,20 @@ public abstract class AbstractInvestigatorImpl extends AdapterBase implements
In
                 return Status.Up;
             } else {
                 if (s_logger.isDebugEnabled()) {
-                    s_logger.debug("host (" + testHostIp + ") cannot be pinged, returning
Alert state");
+                    s_logger.debug("host (" + testHostIp + ") cannot be pinged, returning
Unknown (I don't know) state");
                 }
-                return Status.Alert;
+                return Status.Unknown;
             }
         } catch (AgentUnavailableException e) {
             if (s_logger.isDebugEnabled()) {
-                s_logger.debug("host (" + testHostIp + "): " + e.getLocalizedMessage() +
", returning Disconnected state");
+                s_logger.debug("host (" + testHostIp + "): " + e.getLocalizedMessage() +
", trapped AgentUnavailableException returning Unknown state");
             }
-            return Status.Disconnected;
+            return Status.Unknown;
         } catch (OperationTimedoutException e) {
             if (s_logger.isDebugEnabled()) {
-                s_logger.debug("host (" + testHostIp + "): " + e.getLocalizedMessage() +
", returning Alert state");
+                s_logger.debug("host (" + testHostIp + "): " + e.getLocalizedMessage() +
", trapped OperationTimedoutException returning Unknown state");
             }
-            return Status.Alert;
+            return Status.Unknown;
         }
     }
 }

http://git-wip-us.apache.org/repos/asf/cloudstack/blob/7a1cb28c/server/src/com/cloud/ha/ManagementIPSystemVMInvestigator.java
----------------------------------------------------------------------
diff --git a/server/src/com/cloud/ha/ManagementIPSystemVMInvestigator.java b/server/src/com/cloud/ha/ManagementIPSystemVMInvestigator.java
index 95e803f..27ca849 100644
--- a/server/src/com/cloud/ha/ManagementIPSystemVMInvestigator.java
+++ b/server/src/com/cloud/ha/ManagementIPSystemVMInvestigator.java
@@ -78,10 +78,8 @@ public class ManagementIPSystemVMInvestigator extends AbstractInvestigatorImpl
{
             List<Long> otherHosts = findHostByPod(vmHost.getPodId(), vm.getHostId());
             for (Long otherHost : otherHosts) {
                 Status vmState = testIpAddress(otherHost, nic.getIp4Address());
-                if (vmState == null) {
-                    // can't get information from that host, try the next one
-                    continue;
-                }
+                assert vmState != null;
+                // In case of Status.Unknown, next host will be tried
                 if (vmState == Status.Up) {
                     if (s_logger.isDebugEnabled()) {
                         s_logger.debug("successfully pinged vm's private IP (" + vm.getPrivateIpAddress()
+ "), returning that the VM is up");
@@ -91,7 +89,8 @@ public class ManagementIPSystemVMInvestigator extends AbstractInvestigatorImpl
{
                     // We can't ping the VM directly...if we can ping the host, then report
the VM down.
                     // If we can't ping the host, then we don't have enough information.
                     Status vmHostState = testIpAddress(otherHost, vmHost.getPrivateIpAddress());
-                    if ((vmHostState != null) && (vmHostState == Status.Up)) {
+                    assert vmHostState != null;
+                    if (vmHostState == Status.Up) {
                         if (s_logger.isDebugEnabled()) {
                             s_logger.debug("successfully pinged vm's host IP (" + vmHost.getPrivateIpAddress()
+
                                 "), but could not ping VM, returning that the VM is down");

http://git-wip-us.apache.org/repos/asf/cloudstack/blob/7a1cb28c/server/src/com/cloud/ha/UserVmDomRInvestigator.java
----------------------------------------------------------------------
diff --git a/server/src/com/cloud/ha/UserVmDomRInvestigator.java b/server/src/com/cloud/ha/UserVmDomRInvestigator.java
index d6f7279..23db01f 100644
--- a/server/src/com/cloud/ha/UserVmDomRInvestigator.java
+++ b/server/src/com/cloud/ha/UserVmDomRInvestigator.java
@@ -116,14 +116,12 @@ public class UserVmDomRInvestigator extends AbstractInvestigatorImpl
{
         List<Long> otherHosts = findHostByPod(agent.getPodId(), agent.getId());
 
         for (Long hostId : otherHosts) {
-
             if (s_logger.isDebugEnabled()) {
                 s_logger.debug("sending ping from (" + hostId + ") to agent's host ip address
(" + agent.getPrivateIpAddress() + ")");
             }
             Status hostState = testIpAddress(hostId, agent.getPrivateIpAddress());
-            if (hostState == null) {
-                continue;
-            }
+            assert hostState != null;
+            // In case of Status.Unknown, next host will be tried
             if (hostState == Status.Up) {
                 if (s_logger.isDebugEnabled()) {
                     s_logger.debug("ping from (" + hostId + ") to agent's host ip address
(" + agent.getPrivateIpAddress() +
@@ -134,7 +132,7 @@ public class UserVmDomRInvestigator extends AbstractInvestigatorImpl {
                 if (s_logger.isDebugEnabled()) {
                     s_logger.debug("returning host state: " + hostState);
                 }
-                return hostState;
+                return Status.Down;
             }
         }
 


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