Hi Fariborz, This does not look like a Cloudstack issue, assuming this is a compute host and storage is somewhere else, why don’t you reinstall it to a stock version of the linux distro you are running and try again?
Thanks, Boris. From: Fariborz Navidan <[email protected]> Date: Tuesday, 16 June 2026 at 12:25 pm To: [email protected] <[email protected]> Subject: URGENT: KVM Host freezes even in emergency mode Hi Everbody I have a very odd issue on the KVm host where both agent and management is installed. Recently I have tried to mirror outbound smtp traffic from a test vm to IFB device to analyze it using zeek for spam filtering. I did the mirroring using tc filters. Everything was working before I added a custom libvirt hook inside */etc/libvirt/hooks/qemu.d* and restarted libvirtd service to add tc filter rule to any new VM being created. Once I restarted libvirtd host freezed and afterwards everytime host boots it freezes not accepting any input even in emergency mode. When I enter emergency mode, it only allows me a few seconds to issue a command and then freezes. This happens even if I mask NetworkManager, libvirtd and cloudstack-agent during boot to disable any service that cause system freeze I have reverted back everything but still kernel freezes As I needed to analyze existing smtp traffic I needed to do on the production server but everything is down. Please help! Best Regards
