Hello Jevgeni, Whats is your linux distribution ? On ubuntu 16.04, We ran into the same problem few month ago and we had to modify the libvirt-bin.service as well.
'ExecStart=/usr/sbin/libvirtd $libvirtd_opts' >> 'ExecStart=/usr/sbin/libvirtd -l $libvirtd_opts' Add the "-l" before $libvirtd_opts Best regards, N.B -----Message d'origine----- De : Jevgeni Zolotarjov [mailto:j.zolotar...@gmail.com] Envoyé : mardi 18 septembre 2018 18:10 À : users@cloudstack.apache.org Objet : Unable to migrate instance to new host We were running cloudstack 4.11.1 with 1 host. Now we added another identical host. The procedure completed successfully. But the attempt to migrate instance to this new host fails with error message: Migration was refused connection to destination: qemu+tcp://A.B.C.D/system. Please check libvirt configuration compatibility and firewall rules on the source and destination hosts. iptables configuration on both hosts is the one suggested here http://docs.cloudstack.apache.org/projects/archived-cloudstack-installation/en/4.11/hypervisor/kvm.html#configuring-the-firewall Please help.