Github user rhtyd commented on the pull request:
https://github.com/apache/cloudstack/pull/1549#issuecomment-220289585
@swill I was able to reproduce the addHost issue and fixed it. I was able
to deploy against a KVM env with two clusters with Ubuntu and CentOS based
hosts in each: (addHost can fail silently if we're trying to mix CentOS and
Ubuntu KVM hosts in the same cluster)
If possible, I would request for this bugfix to be added in 4.9.0 release
as it fixes:
- critical nio reconnection, improves SSL handling by making it non-blocking
- without this fix, agents (kvm, systemvm etc) can take some time (minutes
to hours) to reconnect
- the management server's agent handler on port 8250 can be pwned by a
single telnet (or similar malicious) client. To test, on existing deployments
without this patch just connect a telnet agent on port 8250 of the mgmt server,
now this mgmt server can no longer immediately handle any agent connection (try
restarting kvm agent for example).
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