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https://issues.apache.org/jira/browse/CLOUDSTACK-10132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16250605#comment-16250605
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ASF GitHub Bot commented on CLOUDSTACK-10132:
---------------------------------------------
nvazquez commented on a change in pull request #2309: CLOUDSTACK-10132:
Multiple Management Servers Support for agents
URL: https://github.com/apache/cloudstack/pull/2309#discussion_r150712053
##########
File path: agent/src/com/cloud/agent/Agent.java
##########
@@ -990,4 +1091,53 @@ public void doTask(final Task task) throws
TaskExecutionException {
}
}
}
+
+ public class HostLBCheckerTask extends ManagedContextTimerTask {
+
+ @Override
+ protected void runInContext() {
+ try {
+ int index = 0;
+ final String[] msList = _shell.getHosts();
+ String preferredHost = msList[index];
+ final String connectedHost = _shell.getConnectedHost();
+ if (s_logger.isTraceEnabled()) {
+ s_logger.trace("Running host LB checker task, connected
host=" + connectedHost + ", preferred host=" + preferredHost);
+ }
+ final long wait = _shell.getFailbackPollingWait();
+ while (!preferredHost.equals(connectedHost)) {
+ if (_link != null) {
+ boolean isHostUp = true;
+ try (final Socket socket = new Socket()) {
+ socket.connect(new
InetSocketAddress(preferredHost, _shell.getPort()), 5000);
+ } catch (final IOException e) {
+ isHostUp = false;
+ if (s_logger.isDebugEnabled()) {
+ s_logger.debug("Host: " + preferredHost + "
is not reachable, trying to reconnect to next host...");
+ }
+ }
+ if (isHostUp && _link != null) {
+ long initialTime = System.currentTimeMillis();
+ while (System.currentTimeMillis() - initialTime <
wait && _inProgress.get() > 0) {
+ s_logger.debug("Waiting for active commands
to be completed");
+ Thread.sleep(5000l);
+ }
+ if (_inProgress.get() == 0) {
+ if (s_logger.isDebugEnabled()) {
+ s_logger.debug("Preferred host is found
to be reachable, trying to reconnect to: " + preferredHost);
+ }
+ _shell.resetHostCounter();
+ reconnect(_link);
+ }
+ }
+ }
+ index = (index + 1) % msList.length;
Review comment:
Thanks @rhtyd, I assumed background task should attempt reconnection to any
available host starting from the preferred one at the beggining of the list and
trying in order on 'host' list. I refactored this background task to attempt
reconnection only to preferred host as you suggested, I think it simplifies the
feature
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> Multiple Management Servers Support for agents
> ----------------------------------------------
>
> Key: CLOUDSTACK-10132
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-10132
> Project: CloudStack
> Issue Type: Improvement
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Affects Versions: 4.11.0.0
> Reporter: Nicolas Vazquez
> Assignee: Nicolas Vazquez
>
> Multiple Management Servers Support for agents
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