vcenter keeps showing everything "offline" and "disconnected"

[meddle2010]

Running 3.5 on several hosts with vCenter.  things keep being thrown offline or disconnected.  Hosts actually say "not responding" and VMs show "disconnected" If I restart the primary service, it comes back online for a while, but then happens again.

What should I check?

[Ather_Beg]

Hi,

Have you checked if port 902 is open both ways between the vCenter server and the hosts in question?  That is, of course, if there is a firewall in between.

[meddle2010]

I'll check but I don't believe there is a firewall in play.  More information:

On the cluster level, I see:

Configuration Issues

Insufficient capacity in cluster [cluster_name] to satisfy resource configuration in [datacenter_name]

Insufficient resources to satisfy HA failover level on cluster [cluster_name] in [datacenter_name]

Unable to contact a primary HA agent in cluster [cluster_name] in [datacenter_name]

On all but one of the hosts in the cluster, I see:

HA agent on [hostname] in cluster [cluster_name] in [datacenter_name] has an error

This is not my environment, but trying to help out by doing some initial discovery, thanks for the help.

[Ather_Beg]

Using the "Reconfigure for HA..." option on each host might help with this but I don't think, this will help with your original problem.  That said, there might be other issues causing these and the original problem, so fixing those first might be a good idea.

[a_p_]

Some thoughts:

• check the host's Management Network settings (including the gateway address, DNS server settings)
• double check proper DNS name resolution for the hosts as well as vCenter Server
• disable HA for the cluster, and then re-enable it to let it reconfigure the hosts

André