Hello Community,

I have a Cluster with Rocky 8.5 hosts, libvirt 6 and CloudStack Agent 4.18.0. I 
upgrade the first host to Rock 8.9 with libvirt 8, now the agent is not 
starting on the host.
In the log I found "ERROR [kvm.resource.LibvirtConnection] 
(Agent-Handler-1:null) (logid:) Connection with libvirtd is broken: invalid 
connection pointer in virConnectGetVersion"

I know that I cannot mix OS versions in a cluster but I thought this is only 
valid for major versions like Rock 8 / 9.
When I add the host to a new create cluster the host is successfully added.

Any idea how to upgrade my existing cluster without interrupting the instances 
to Rock 8.9?

Any help would be appreciated, thanks

BR, Christian


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